May 2019 - Linux-stable-mirror

Re: [PATCH 00/35] crypto: ccree: features and bug fixes for 5.2

by Gilad Ben-Yossef

On Thu, Apr 18, 2019 at 4:39 PM Gilad Ben-Yossef <gilad(a)benyossef.com> wrote: > > A set of new features, mostly support for CryptoCell 713 > features including protected keys, security disable mode and > new HW revision indetification interface alongside many bug fixes. FYI, A port of those patches from this patch series which have been marked for stable is available at https://github.com/gby/linux/tree/4.19-ccree Gilad -- Gilad Ben-Yossef Chief Coffee Drinker values of β will give rise to dom!

5 years, 11 months

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FAILED: patch "[PATCH] s390/mm: convert to the generic get_user_pages_fast code" failed to apply to 4.19-stable tree

by gregkh＠linuxfoundation.org

The patch below does not apply to the 4.19-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <stable(a)vger.kernel.org>. thanks, greg k-h ------------------ original commit in Linus's tree ------------------ >From 1a42010cdc26bb7e5912984f3c91b8c6d55f089a Mon Sep 17 00:00:00 2001 From: Martin Schwidefsky <schwidefsky(a)de.ibm.com> Date: Tue, 23 Apr 2019 10:53:21 +0200 Subject: [PATCH] s390/mm: convert to the generic get_user_pages_fast code Define the gup_fast_permitted to check against the asce_limit of the mm attached to the current task, then replace the s390 specific gup code with the generic implementation in mm/gup.c. Signed-off-by: Martin Schwidefsky <schwidefsky(a)de.ibm.com> diff --git a/arch/s390/Kconfig b/arch/s390/Kconfig index 566f0b460d21..1c3fcf19c3af 100644 --- a/arch/s390/Kconfig +++ b/arch/s390/Kconfig @@ -149,6 +149,7 @@ config S390 select HAVE_FUNCTION_TRACER select HAVE_FUTEX_CMPXCHG if FUTEX select HAVE_GCC_PLUGINS + select HAVE_GENERIC_GUP select HAVE_KERNEL_BZIP2 select HAVE_KERNEL_GZIP select HAVE_KERNEL_LZ4 diff --git a/arch/s390/include/asm/pgtable.h b/arch/s390/include/asm/pgtable.h index d48be9c27df9..394bec31cb97 100644 --- a/arch/s390/include/asm/pgtable.h +++ b/arch/s390/include/asm/pgtable.h @@ -1265,6 +1265,18 @@ static inline pte_t *pte_offset(pmd_t *pmd, unsigned long address) #define pte_offset_map(pmd, address) pte_offset_kernel(pmd, address) #define pte_unmap(pte) do { } while (0) +static inline bool gup_fast_permitted(unsigned long start, int nr_pages) +{ + unsigned long len, end; + + len = (unsigned long) nr_pages << PAGE_SHIFT; + end = start + len; + if (end < start) + return false; + return end <= current->mm->context.asce_limit; +} +#define gup_fast_permitted gup_fast_permitted + #define pfn_pte(pfn,pgprot) mk_pte_phys(__pa((pfn) << PAGE_SHIFT),(pgprot)) #define pte_pfn(x) (pte_val(x) >> PAGE_SHIFT) #define pte_page(x) pfn_to_page(pte_pfn(x)) diff --git a/arch/s390/mm/Makefile b/arch/s390/mm/Makefile index f5880bfd1b0c..3175413186b9 100644 --- a/arch/s390/mm/Makefile +++ b/arch/s390/mm/Makefile @@ -4,7 +4,7 @@ # obj-y := init.o fault.o extmem.o mmap.o vmem.o maccess.o -obj-y += page-states.o gup.o pageattr.o pgtable.o pgalloc.o +obj-y += page-states.o pageattr.o pgtable.o pgalloc.o obj-$(CONFIG_CMM) += cmm.o obj-$(CONFIG_HUGETLB_PAGE) += hugetlbpage.o diff --git a/arch/s390/mm/gup.c b/arch/s390/mm/gup.c deleted file mode 100644 index a5ffcb132191..000000000000 --- a/arch/s390/mm/gup.c +++ /dev/null @@ -1,291 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0 -/* - * Lockless get_user_pages_fast for s390 - * - * Copyright IBM Corp. 2010 - * Author(s): Martin Schwidefsky <schwidefsky(a)de.ibm.com> - */ -#include <linux/sched.h> -#include <linux/mm.h> -#include <linux/hugetlb.h> -#include <linux/vmstat.h> -#include <linux/pagemap.h> -#include <linux/rwsem.h> -#include <asm/pgtable.h> - -/* - * The performance critical leaf functions are made noinline otherwise gcc - * inlines everything into a single function which results in too much - * register pressure. - */ -static inline int gup_pte_range(pmd_t pmd, unsigned long addr, - unsigned long end, int write, struct page **pages, int *nr) -{ - struct page *head, *page; - unsigned long mask; - pte_t *ptep, pte; - - mask = (write ? _PAGE_PROTECT : 0) | _PAGE_INVALID | _PAGE_SPECIAL; - - ptep = pte_offset_map(&pmd, addr); - do { - pte = *ptep; - barrier(); - /* Similar to the PMD case, NUMA hinting must take slow path */ - if (pte_protnone(pte)) - return 0; - if ((pte_val(pte) & mask) != 0) - return 0; - VM_BUG_ON(!pfn_valid(pte_pfn(pte))); - page = pte_page(pte); - head = compound_head(page); - if (!page_cache_get_speculative(head)) - return 0; - if (unlikely(pte_val(pte) != pte_val(*ptep))) { - put_page(head); - return 0; - } - VM_BUG_ON_PAGE(compound_head(page) != head, page); - pages[*nr] = page; - (*nr)++; - - } while (ptep++, addr += PAGE_SIZE, addr != end); - - return 1; -} - -static inline int gup_huge_pmd(pmd_t *pmdp, pmd_t pmd, unsigned long addr, - unsigned long end, int write, struct page **pages, int *nr) -{ - struct page *head, *page; - unsigned long mask; - int refs; - - mask = (write ? _SEGMENT_ENTRY_PROTECT : 0) | _SEGMENT_ENTRY_INVALID; - if ((pmd_val(pmd) & mask) != 0) - return 0; - VM_BUG_ON(!pfn_valid(pmd_val(pmd) >> PAGE_SHIFT)); - - refs = 0; - head = pmd_page(pmd); - page = head + ((addr & ~PMD_MASK) >> PAGE_SHIFT); - do { - VM_BUG_ON(compound_head(page) != head); - pages[*nr] = page; - (*nr)++; - page++; - refs++; - } while (addr += PAGE_SIZE, addr != end); - - if (!page_cache_add_speculative(head, refs)) { - *nr -= refs; - return 0; - } - - if (unlikely(pmd_val(pmd) != pmd_val(*pmdp))) { - *nr -= refs; - while (refs--) - put_page(head); - return 0; - } - - return 1; -} - - -static inline int gup_pmd_range(pud_t pud, unsigned long addr, - unsigned long end, int write, struct page **pages, int *nr) -{ - unsigned long next; - pmd_t *pmdp, pmd; - - pmdp = pmd_offset(&pud, addr); - do { - pmd = *pmdp; - barrier(); - next = pmd_addr_end(addr, end); - if (pmd_none(pmd)) - return 0; - if (unlikely(pmd_large(pmd))) { - /* - * NUMA hinting faults need to be handled in the GUP - * slowpath for accounting purposes and so that they - * can be serialised against THP migration. - */ - if (pmd_protnone(pmd)) - return 0; - if (!gup_huge_pmd(pmdp, pmd, addr, next, - write, pages, nr)) - return 0; - } else if (!gup_pte_range(pmd, addr, next, - write, pages, nr)) - return 0; - } while (pmdp++, addr = next, addr != end); - - return 1; -} - -static int gup_huge_pud(pud_t *pudp, pud_t pud, unsigned long addr, - unsigned long end, int write, struct page **pages, int *nr) -{ - struct page *head, *page; - unsigned long mask; - int refs; - - mask = (write ? _REGION_ENTRY_PROTECT : 0) | _REGION_ENTRY_INVALID; - if ((pud_val(pud) & mask) != 0) - return 0; - VM_BUG_ON(!pfn_valid(pud_pfn(pud))); - - refs = 0; - head = pud_page(pud); - page = head + ((addr & ~PUD_MASK) >> PAGE_SHIFT); - do { - VM_BUG_ON_PAGE(compound_head(page) != head, page); - pages[*nr] = page; - (*nr)++; - page++; - refs++; - } while (addr += PAGE_SIZE, addr != end); - - if (!page_cache_add_speculative(head, refs)) { - *nr -= refs; - return 0; - } - - if (unlikely(pud_val(pud) != pud_val(*pudp))) { - *nr -= refs; - while (refs--) - put_page(head); - return 0; - } - - return 1; -} - -static inline int gup_pud_range(p4d_t p4d, unsigned long addr, - unsigned long end, int write, struct page **pages, int *nr) -{ - unsigned long next; - pud_t *pudp, pud; - - pudp = pud_offset(&p4d, addr); - do { - pud = *pudp; - barrier(); - next = pud_addr_end(addr, end); - if (pud_none(pud)) - return 0; - if (unlikely(pud_large(pud))) { - if (!gup_huge_pud(pudp, pud, addr, next, write, pages, - nr)) - return 0; - } else if (!gup_pmd_range(pud, addr, next, write, pages, - nr)) - return 0; - } while (pudp++, addr = next, addr != end); - - return 1; -} - -static inline int gup_p4d_range(pgd_t pgd, unsigned long addr, - unsigned long end, int write, struct page **pages, int *nr) -{ - unsigned long next; - p4d_t *p4dp, p4d; - - p4dp = p4d_offset(&pgd, addr); - do { - p4d = *p4dp; - barrier(); - next = p4d_addr_end(addr, end); - if (p4d_none(p4d)) - return 0; - if (!gup_pud_range(p4d, addr, next, write, pages, nr)) - return 0; - } while (p4dp++, addr = next, addr != end); - - return 1; -} - -/* - * Like get_user_pages_fast() except its IRQ-safe in that it won't fall - * back to the regular GUP. - * Note a difference with get_user_pages_fast: this always returns the - * number of pages pinned, 0 if no pages were pinned. - */ -int __get_user_pages_fast(unsigned long start, int nr_pages, int write, - struct page **pages) -{ - struct mm_struct *mm = current->mm; - unsigned long addr, len, end; - unsigned long next, flags; - pgd_t *pgdp, pgd; - int nr = 0; - - start &= PAGE_MASK; - addr = start; - len = (unsigned long) nr_pages << PAGE_SHIFT; - end = start + len; - if ((end <= start) || (end > mm->context.asce_limit)) - return 0; - /* - * local_irq_save() doesn't prevent pagetable teardown, but does - * prevent the pagetables from being freed on s390. - * - * So long as we atomically load page table pointers versus teardown, - * we can follow the address down to the the page and take a ref on it. - */ - local_irq_save(flags); - pgdp = pgd_offset(mm, addr); - do { - pgd = *pgdp; - barrier(); - next = pgd_addr_end(addr, end); - if (pgd_none(pgd)) - break; - if (!gup_p4d_range(pgd, addr, next, write, pages, &nr)) - break; - } while (pgdp++, addr = next, addr != end); - local_irq_restore(flags); - - return nr; -} - -/** - * get_user_pages_fast() - pin user pages in memory - * @start: starting user address - * @nr_pages: number of pages from start to pin - * @write: whether pages will be written to - * @pages: array that receives pointers to the pages pinned. - * Should be at least nr_pages long. - * - * Attempt to pin user pages in memory without taking mm->mmap_sem. - * If not successful, it will fall back to taking the lock and - * calling get_user_pages(). - * - * Returns number of pages pinned. This may be fewer than the number - * requested. If nr_pages is 0 or negative, returns 0. If no pages - * were pinned, returns -errno. - */ -int get_user_pages_fast(unsigned long start, int nr_pages, int write, - struct page **pages) -{ - int nr, ret; - - might_sleep(); - start &= PAGE_MASK; - nr = __get_user_pages_fast(start, nr_pages, write, pages); - if (nr == nr_pages) - return nr; - - /* Try to get the remaining pages with get_user_pages */ - start += nr << PAGE_SHIFT; - pages += nr; - ret = get_user_pages_unlocked(start, nr_pages - nr, pages, - write ? FOLL_WRITE : 0); - /* Have to be a bit careful with return values */ - if (nr > 0) - ret = (ret < 0) ? nr : ret + nr; - return ret; -}

5 years, 11 months

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FAILED: patch "[PATCH] s390/mm: make the pxd_offset functions more robust" failed to apply to 4.19-stable tree

by gregkh＠linuxfoundation.org

The patch below does not apply to the 4.19-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <stable(a)vger.kernel.org>. thanks, greg k-h ------------------ original commit in Linus's tree ------------------ >From d1874a0c2805fcfa9162c972d6b7541e57adb542 Mon Sep 17 00:00:00 2001 From: Martin Schwidefsky <schwidefsky(a)de.ibm.com> Date: Tue, 23 Apr 2019 10:51:12 +0200 Subject: [PATCH] s390/mm: make the pxd_offset functions more robust Change the way how pgd_offset, p4d_offset, pud_offset and pmd_offset walk the page tables. pgd_offset now always calculates the index for the top-level page table and adds it to the pgd, this is either a segment table offset for a 2-level setup, a region-3 offset for 3-levels, region-2 offset for 4-levels, or a region-1 offset for a 5-level setup. The other three functions p4d_offset, pud_offset and pmd_offset will only add the respective offset if they dereference the passed pointer. With the new way of walking the page tables a sequence like this from mm/gup.c now works: pgdp = pgd_offset(current->mm, addr); pgd = READ_ONCE(*pgdp); p4dp = p4d_offset(&pgd, addr); p4d = READ_ONCE(*p4dp); pudp = pud_offset(&p4d, addr); pud = READ_ONCE(*pudp); pmdp = pmd_offset(&pud, addr); pmd = READ_ONCE(*pmdp); Signed-off-by: Martin Schwidefsky <schwidefsky(a)de.ibm.com> diff --git a/arch/s390/include/asm/pgtable.h b/arch/s390/include/asm/pgtable.h index 76dc344edb8c..d48be9c27df9 100644 --- a/arch/s390/include/asm/pgtable.h +++ b/arch/s390/include/asm/pgtable.h @@ -1204,42 +1204,67 @@ static inline pte_t mk_pte(struct page *page, pgprot_t pgprot) #define pmd_index(address) (((address) >> PMD_SHIFT) & (PTRS_PER_PMD-1)) #define pte_index(address) (((address) >> PAGE_SHIFT) & (PTRS_PER_PTE-1)) -#define pgd_offset(mm, address) ((mm)->pgd + pgd_index(address)) -#define pgd_offset_k(address) pgd_offset(&init_mm, address) -#define pgd_offset_raw(pgd, addr) ((pgd) + pgd_index(addr)) - #define pmd_deref(pmd) (pmd_val(pmd) & _SEGMENT_ENTRY_ORIGIN) #define pud_deref(pud) (pud_val(pud) & _REGION_ENTRY_ORIGIN) #define p4d_deref(pud) (p4d_val(pud) & _REGION_ENTRY_ORIGIN) #define pgd_deref(pgd) (pgd_val(pgd) & _REGION_ENTRY_ORIGIN) -static inline p4d_t *p4d_offset(pgd_t *pgd, unsigned long address) +/* + * The pgd_offset function *always* adds the index for the top-level + * region/segment table. This is done to get a sequence like the + * following to work: + * pgdp = pgd_offset(current->mm, addr); + * pgd = READ_ONCE(*pgdp); + * p4dp = p4d_offset(&pgd, addr); + * ... + * The subsequent p4d_offset, pud_offset and pmd_offset functions + * only add an index if they dereferenced the pointer. + */ +static inline pgd_t *pgd_offset_raw(pgd_t *pgd, unsigned long address) { - p4d_t *p4d = (p4d_t *) pgd; + unsigned long rste; + unsigned int shift; - if ((pgd_val(*pgd) & _REGION_ENTRY_TYPE_MASK) == _REGION_ENTRY_TYPE_R1) - p4d = (p4d_t *) pgd_deref(*pgd); - return p4d + p4d_index(address); + /* Get the first entry of the top level table */ + rste = pgd_val(*pgd); + /* Pick up the shift from the table type of the first entry */ + shift = ((rste & _REGION_ENTRY_TYPE_MASK) >> 2) * 11 + 20; + return pgd + ((address >> shift) & (PTRS_PER_PGD - 1)); } -static inline pud_t *pud_offset(p4d_t *p4d, unsigned long address) +#define pgd_offset(mm, address) pgd_offset_raw(READ_ONCE((mm)->pgd), address) +#define pgd_offset_k(address) pgd_offset(&init_mm, address) + +static inline p4d_t *p4d_offset(pgd_t *pgd, unsigned long address) { - pud_t *pud = (pud_t *) p4d; + if ((pgd_val(*pgd) & _REGION_ENTRY_TYPE_MASK) >= _REGION_ENTRY_TYPE_R1) + return (p4d_t *) pgd_deref(*pgd) + p4d_index(address); + return (p4d_t *) pgd; +} - if ((p4d_val(*p4d) & _REGION_ENTRY_TYPE_MASK) == _REGION_ENTRY_TYPE_R2) - pud = (pud_t *) p4d_deref(*p4d); - return pud + pud_index(address); +static inline pud_t *pud_offset(p4d_t *p4d, unsigned long address) +{ + if ((p4d_val(*p4d) & _REGION_ENTRY_TYPE_MASK) >= _REGION_ENTRY_TYPE_R2) + return (pud_t *) p4d_deref(*p4d) + pud_index(address); + return (pud_t *) p4d; } static inline pmd_t *pmd_offset(pud_t *pud, unsigned long address) { - pmd_t *pmd = (pmd_t *) pud; + if ((pud_val(*pud) & _REGION_ENTRY_TYPE_MASK) >= _REGION_ENTRY_TYPE_R3) + return (pmd_t *) pud_deref(*pud) + pmd_index(address); + return (pmd_t *) pud; +} - if ((pud_val(*pud) & _REGION_ENTRY_TYPE_MASK) == _REGION_ENTRY_TYPE_R3) - pmd = (pmd_t *) pud_deref(*pud); - return pmd + pmd_index(address); +static inline pte_t *pte_offset(pmd_t *pmd, unsigned long address) +{ + return (pte_t *) pmd_deref(*pmd) + pte_index(address); } +#define pte_offset_kernel(pmd, address) pte_offset(pmd, address) +#define pte_offset_map(pmd, address) pte_offset_kernel(pmd, address) +#define pte_unmap(pte) do { } while (0) + #define pfn_pte(pfn,pgprot) mk_pte_phys(__pa((pfn) << PAGE_SHIFT),(pgprot)) #define pte_pfn(x) (pte_val(x) >> PAGE_SHIFT) #define pte_page(x) pfn_to_page(pte_pfn(x)) @@ -1249,12 +1274,6 @@ static inline pmd_t *pmd_offset(pud_t *pud, unsigned long address) #define p4d_page(p4d) pfn_to_page(p4d_pfn(p4d)) #define pgd_page(pgd) pfn_to_page(pgd_pfn(pgd)) -/* Find an entry in the lowest level page table.. */ -#define pte_offset(pmd, addr) ((pte_t *) pmd_deref(*(pmd)) + pte_index(addr)) -#define pte_offset_kernel(pmd, address) pte_offset(pmd,address) -#define pte_offset_map(pmd, address) pte_offset_kernel(pmd, address) -#define pte_unmap(pte) do { } while (0) - static inline pmd_t pmd_wrprotect(pmd_t pmd) { pmd_val(pmd) &= ~_SEGMENT_ENTRY_WRITE; diff --git a/arch/s390/mm/gup.c b/arch/s390/mm/gup.c index 2809d11c7a28..a5ffcb132191 100644 --- a/arch/s390/mm/gup.c +++ b/arch/s390/mm/gup.c @@ -18,7 +18,7 @@ * inlines everything into a single function which results in too much * register pressure. */ -static inline int gup_pte_range(pmd_t *pmdp, pmd_t pmd, unsigned long addr, +static inline int gup_pte_range(pmd_t pmd, unsigned long addr, unsigned long end, int write, struct page **pages, int *nr) { struct page *head, *page; @@ -27,7 +27,7 @@ static inline int gup_pte_range(pmd_t *pmdp, pmd_t pmd, unsigned long addr, mask = (write ? _PAGE_PROTECT : 0) | _PAGE_INVALID | _PAGE_SPECIAL; - ptep = ((pte_t *) pmd_deref(pmd)) + pte_index(addr); + ptep = pte_offset_map(&pmd, addr); do { pte = *ptep; barrier(); @@ -93,16 +93,13 @@ static inline int gup_huge_pmd(pmd_t *pmdp, pmd_t pmd, unsigned long addr, } -static inline int gup_pmd_range(pud_t *pudp, pud_t pud, unsigned long addr, +static inline int gup_pmd_range(pud_t pud, unsigned long addr, unsigned long end, int write, struct page **pages, int *nr) { unsigned long next; pmd_t *pmdp, pmd; - pmdp = (pmd_t *) pudp; - if ((pud_val(pud) & _REGION_ENTRY_TYPE_MASK) == _REGION_ENTRY_TYPE_R3) - pmdp = (pmd_t *) pud_deref(pud); - pmdp += pmd_index(addr); + pmdp = pmd_offset(&pud, addr); do { pmd = *pmdp; barrier(); @@ -120,7 +117,7 @@ static inline int gup_pmd_range(pud_t *pudp, pud_t pud, unsigned long addr, if (!gup_huge_pmd(pmdp, pmd, addr, next, write, pages, nr)) return 0; - } else if (!gup_pte_range(pmdp, pmd, addr, next, + } else if (!gup_pte_range(pmd, addr, next, write, pages, nr)) return 0; } while (pmdp++, addr = next, addr != end); @@ -166,16 +163,13 @@ static int gup_huge_pud(pud_t *pudp, pud_t pud, unsigned long addr, return 1; } -static inline int gup_pud_range(p4d_t *p4dp, p4d_t p4d, unsigned long addr, +static inline int gup_pud_range(p4d_t p4d, unsigned long addr, unsigned long end, int write, struct page **pages, int *nr) { unsigned long next; pud_t *pudp, pud; - pudp = (pud_t *) p4dp; - if ((p4d_val(p4d) & _REGION_ENTRY_TYPE_MASK) == _REGION_ENTRY_TYPE_R2) - pudp = (pud_t *) p4d_deref(p4d); - pudp += pud_index(addr); + pudp = pud_offset(&p4d, addr); do { pud = *pudp; barrier(); @@ -186,7 +180,7 @@ static inline int gup_pud_range(p4d_t *p4dp, p4d_t p4d, unsigned long addr, if (!gup_huge_pud(pudp, pud, addr, next, write, pages, nr)) return 0; - } else if (!gup_pmd_range(pudp, pud, addr, next, write, pages, + } else if (!gup_pmd_range(pud, addr, next, write, pages, nr)) return 0; } while (pudp++, addr = next, addr != end); @@ -194,23 +188,20 @@ static inline int gup_pud_range(p4d_t *p4dp, p4d_t p4d, unsigned long addr, return 1; } -static inline int gup_p4d_range(pgd_t *pgdp, pgd_t pgd, unsigned long addr, +static inline int gup_p4d_range(pgd_t pgd, unsigned long addr, unsigned long end, int write, struct page **pages, int *nr) { unsigned long next; p4d_t *p4dp, p4d; - p4dp = (p4d_t *) pgdp; - if ((pgd_val(pgd) & _REGION_ENTRY_TYPE_MASK) == _REGION_ENTRY_TYPE_R1) - p4dp = (p4d_t *) pgd_deref(pgd); - p4dp += p4d_index(addr); + p4dp = p4d_offset(&pgd, addr); do { p4d = *p4dp; barrier(); next = p4d_addr_end(addr, end); if (p4d_none(p4d)) return 0; - if (!gup_pud_range(p4dp, p4d, addr, next, write, pages, nr)) + if (!gup_pud_range(p4d, addr, next, write, pages, nr)) return 0; } while (p4dp++, addr = next, addr != end); @@ -253,7 +244,7 @@ int __get_user_pages_fast(unsigned long start, int nr_pages, int write, next = pgd_addr_end(addr, end); if (pgd_none(pgd)) break; - if (!gup_p4d_range(pgdp, pgd, addr, next, write, pages, &nr)) + if (!gup_p4d_range(pgd, addr, next, write, pages, &nr)) break; } while (pgdp++, addr = next, addr != end); local_irq_restore(flags);

5 years, 11 months

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Re: [PATCH pstore-next v2 2/4] pstore: Allocate compression during late_initcall()

by Douglas Anderson

Hi, On Thu, Oct 18, 2018 at 11:56 AM Kees Cook <keescook(a)chromium.org> wrote: > > From: "Joel Fernandes (Google)" <joel(a)joelfernandes.org> > > ramoops's call of pstore_register() was recently moved to run during > late_initcall() because the crypto backend may not have been ready during > postcore_initcall(). This meant early-boot crash dumps were not getting > caught by pstore any more. > > Instead, lets allow calls to pstore_register() earlier, and once crypto > is ready we can initialize the compression. > > Reported-by: Sai Prakash Ranjan <saiprakash.ranjan(a)codeaurora.org> > Signed-off-by: Joel Fernandes (Google) <joel(a)joelfernandes.org> > Tested-by: Sai Prakash Ranjan <saiprakash.ranjan(a)codeaurora.org> > Fixes: cb3bee0369bc ("pstore: Use crypto compress API") > [kees: trivial rebase] > Signed-off-by: Kees Cook <keescook(a)chromium.org> > --- > fs/pstore/platform.c | 10 +++++++++- > fs/pstore/ram.c | 2 +- > 2 files changed, 10 insertions(+), 2 deletions(-) I'd propose that these three patches: 95047b0519c1 pstore: Refactor compression initialization 416031653eb5 pstore: Allocate compression during late_initcall() cb095afd4476 pstore: Centralize init/exit routines Get sent to linux-stable. Specifically I'll mention that 4.19 needs it. IMO the regression of pstore not catching early boot crashes is pretty serious IMO. Thanks! -Doug

5 years, 11 months

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FAILED: patch "[PATCH] libnvdimm/namespace: Fix label tracking error" failed to apply to 4.4-stable tree

by gregkh＠linuxfoundation.org

The patch below does not apply to the 4.4-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <stable(a)vger.kernel.org>. thanks, greg k-h ------------------ original commit in Linus's tree ------------------ >From c4703ce11c23423d4b46e3d59aef7979814fd608 Mon Sep 17 00:00:00 2001 From: Dan Williams <dan.j.williams(a)intel.com> Date: Tue, 30 Apr 2019 21:51:21 -0700 Subject: [PATCH] libnvdimm/namespace: Fix label tracking error Users have reported intermittent occurrences of DIMM initialization failures due to duplicate allocations of address capacity detected in the labels, or errors of the form below, both have the same root cause. nd namespace1.4: failed to track label: 0 WARNING: CPU: 17 PID: 1381 at drivers/nvdimm/label.c:863 RIP: 0010:__pmem_label_update+0x56c/0x590 [libnvdimm] Call Trace: ? nd_pmem_namespace_label_update+0xd6/0x160 [libnvdimm] nd_pmem_namespace_label_update+0xd6/0x160 [libnvdimm] uuid_store+0x17e/0x190 [libnvdimm] kernfs_fop_write+0xf0/0x1a0 vfs_write+0xb7/0x1b0 ksys_write+0x57/0xd0 do_syscall_64+0x60/0x210 Unfortunately those reports were typically with a busy parallel namespace creation / destruction loop making it difficult to see the components of the bug. However, Jane provided a simple reproducer using the work-in-progress sub-section implementation. When ndctl is reconfiguring a namespace it may take an existing defunct / disabled namespace and reconfigure it with a new uuid and other parameters. Critically namespace_update_uuid() takes existing address resources and renames them for the new namespace to use / reconfigure as it sees fit. The bug is that this rename only happens in the resource tracking tree. Existing labels with the old uuid are not reaped leading to a scenario where multiple active labels reference the same span of address range. Teach namespace_update_uuid() to flag any references to the old uuid for reaping at the next label update attempt. Cc: <stable(a)vger.kernel.org> Fixes: bf9bccc14c05 ("libnvdimm: pmem label sets and namespace instantiation") Link: https://github.com/pmem/ndctl/issues/91 Reported-by: Jane Chu <jane.chu(a)oracle.com> Reported-by: Jeff Moyer <jmoyer(a)redhat.com> Reported-by: Erwin Tsaur <erwin.tsaur(a)oracle.com> Cc: Johannes Thumshirn <jthumshirn(a)suse.de> Signed-off-by: Dan Williams <dan.j.williams(a)intel.com> diff --git a/drivers/nvdimm/label.c b/drivers/nvdimm/label.c index f3d753d3169c..2030805aa216 100644 --- a/drivers/nvdimm/label.c +++ b/drivers/nvdimm/label.c @@ -756,6 +756,17 @@ static const guid_t *to_abstraction_guid(enum nvdimm_claim_class claim_class, return &guid_null; } +static void reap_victim(struct nd_mapping *nd_mapping, + struct nd_label_ent *victim) +{ + struct nvdimm_drvdata *ndd = to_ndd(nd_mapping); + u32 slot = to_slot(ndd, victim->label); + + dev_dbg(ndd->dev, "free: %d\n", slot); + nd_label_free_slot(ndd, slot); + victim->label = NULL; +} + static int __pmem_label_update(struct nd_region *nd_region, struct nd_mapping *nd_mapping, struct nd_namespace_pmem *nspm, int pos, unsigned long flags) @@ -763,9 +774,9 @@ static int __pmem_label_update(struct nd_region *nd_region, struct nd_namespace_common *ndns = &nspm->nsio.common; struct nd_interleave_set *nd_set = nd_region->nd_set; struct nvdimm_drvdata *ndd = to_ndd(nd_mapping); - struct nd_label_ent *label_ent, *victim = NULL; struct nd_namespace_label *nd_label; struct nd_namespace_index *nsindex; + struct nd_label_ent *label_ent; struct nd_label_id label_id; struct resource *res; unsigned long *free; @@ -834,18 +845,10 @@ static int __pmem_label_update(struct nd_region *nd_region, list_for_each_entry(label_ent, &nd_mapping->labels, list) { if (!label_ent->label) continue; - if (memcmp(nspm->uuid, label_ent->label->uuid, - NSLABEL_UUID_LEN) != 0) - continue; - victim = label_ent; - list_move_tail(&victim->list, &nd_mapping->labels); - break; - } - if (victim) { - dev_dbg(ndd->dev, "free: %d\n", slot); - slot = to_slot(ndd, victim->label); - nd_label_free_slot(ndd, slot); - victim->label = NULL; + if (test_and_clear_bit(ND_LABEL_REAP, &label_ent->flags) + || memcmp(nspm->uuid, label_ent->label->uuid, + NSLABEL_UUID_LEN) == 0) + reap_victim(nd_mapping, label_ent); } /* update index */ diff --git a/drivers/nvdimm/namespace_devs.c b/drivers/nvdimm/namespace_devs.c index f293556cbbf6..d0214644e334 100644 --- a/drivers/nvdimm/namespace_devs.c +++ b/drivers/nvdimm/namespace_devs.c @@ -1247,12 +1247,27 @@ static int namespace_update_uuid(struct nd_region *nd_region, for (i = 0; i < nd_region->ndr_mappings; i++) { struct nd_mapping *nd_mapping = &nd_region->mapping[i]; struct nvdimm_drvdata *ndd = to_ndd(nd_mapping); + struct nd_label_ent *label_ent; struct resource *res; for_each_dpa_resource(ndd, res) if (strcmp(res->name, old_label_id.id) == 0) sprintf((void *) res->name, "%s", new_label_id.id); + + mutex_lock(&nd_mapping->lock); + list_for_each_entry(label_ent, &nd_mapping->labels, list) { + struct nd_namespace_label *nd_label = label_ent->label; + struct nd_label_id label_id; + + if (!nd_label) + continue; + nd_label_gen_id(&label_id, nd_label->uuid, + __le32_to_cpu(nd_label->flags)); + if (strcmp(old_label_id.id, label_id.id) == 0) + set_bit(ND_LABEL_REAP, &label_ent->flags); + } + mutex_unlock(&nd_mapping->lock); } kfree(*old_uuid); out: diff --git a/drivers/nvdimm/nd.h b/drivers/nvdimm/nd.h index a5ac3b240293..191d62af0e51 100644 --- a/drivers/nvdimm/nd.h +++ b/drivers/nvdimm/nd.h @@ -113,8 +113,12 @@ struct nd_percpu_lane { spinlock_t lock; }; +enum nd_label_flags { + ND_LABEL_REAP, +}; struct nd_label_ent { struct list_head list; + unsigned long flags; struct nd_namespace_label *label; };

5 years, 11 months

1
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0 0

FAILED: patch "[PATCH] libnvdimm/namespace: Fix label tracking error" failed to apply to 4.9-stable tree

by gregkh＠linuxfoundation.org

The patch below does not apply to the 4.9-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <stable(a)vger.kernel.org>. thanks, greg k-h ------------------ original commit in Linus's tree ------------------ >From c4703ce11c23423d4b46e3d59aef7979814fd608 Mon Sep 17 00:00:00 2001 From: Dan Williams <dan.j.williams(a)intel.com> Date: Tue, 30 Apr 2019 21:51:21 -0700 Subject: [PATCH] libnvdimm/namespace: Fix label tracking error Users have reported intermittent occurrences of DIMM initialization failures due to duplicate allocations of address capacity detected in the labels, or errors of the form below, both have the same root cause. nd namespace1.4: failed to track label: 0 WARNING: CPU: 17 PID: 1381 at drivers/nvdimm/label.c:863 RIP: 0010:__pmem_label_update+0x56c/0x590 [libnvdimm] Call Trace: ? nd_pmem_namespace_label_update+0xd6/0x160 [libnvdimm] nd_pmem_namespace_label_update+0xd6/0x160 [libnvdimm] uuid_store+0x17e/0x190 [libnvdimm] kernfs_fop_write+0xf0/0x1a0 vfs_write+0xb7/0x1b0 ksys_write+0x57/0xd0 do_syscall_64+0x60/0x210 Unfortunately those reports were typically with a busy parallel namespace creation / destruction loop making it difficult to see the components of the bug. However, Jane provided a simple reproducer using the work-in-progress sub-section implementation. When ndctl is reconfiguring a namespace it may take an existing defunct / disabled namespace and reconfigure it with a new uuid and other parameters. Critically namespace_update_uuid() takes existing address resources and renames them for the new namespace to use / reconfigure as it sees fit. The bug is that this rename only happens in the resource tracking tree. Existing labels with the old uuid are not reaped leading to a scenario where multiple active labels reference the same span of address range. Teach namespace_update_uuid() to flag any references to the old uuid for reaping at the next label update attempt. Cc: <stable(a)vger.kernel.org> Fixes: bf9bccc14c05 ("libnvdimm: pmem label sets and namespace instantiation") Link: https://github.com/pmem/ndctl/issues/91 Reported-by: Jane Chu <jane.chu(a)oracle.com> Reported-by: Jeff Moyer <jmoyer(a)redhat.com> Reported-by: Erwin Tsaur <erwin.tsaur(a)oracle.com> Cc: Johannes Thumshirn <jthumshirn(a)suse.de> Signed-off-by: Dan Williams <dan.j.williams(a)intel.com> diff --git a/drivers/nvdimm/label.c b/drivers/nvdimm/label.c index f3d753d3169c..2030805aa216 100644 --- a/drivers/nvdimm/label.c +++ b/drivers/nvdimm/label.c @@ -756,6 +756,17 @@ static const guid_t *to_abstraction_guid(enum nvdimm_claim_class claim_class, return &guid_null; } +static void reap_victim(struct nd_mapping *nd_mapping, + struct nd_label_ent *victim) +{ + struct nvdimm_drvdata *ndd = to_ndd(nd_mapping); + u32 slot = to_slot(ndd, victim->label); + + dev_dbg(ndd->dev, "free: %d\n", slot); + nd_label_free_slot(ndd, slot); + victim->label = NULL; +} + static int __pmem_label_update(struct nd_region *nd_region, struct nd_mapping *nd_mapping, struct nd_namespace_pmem *nspm, int pos, unsigned long flags) @@ -763,9 +774,9 @@ static int __pmem_label_update(struct nd_region *nd_region, struct nd_namespace_common *ndns = &nspm->nsio.common; struct nd_interleave_set *nd_set = nd_region->nd_set; struct nvdimm_drvdata *ndd = to_ndd(nd_mapping); - struct nd_label_ent *label_ent, *victim = NULL; struct nd_namespace_label *nd_label; struct nd_namespace_index *nsindex; + struct nd_label_ent *label_ent; struct nd_label_id label_id; struct resource *res; unsigned long *free; @@ -834,18 +845,10 @@ static int __pmem_label_update(struct nd_region *nd_region, list_for_each_entry(label_ent, &nd_mapping->labels, list) { if (!label_ent->label) continue; - if (memcmp(nspm->uuid, label_ent->label->uuid, - NSLABEL_UUID_LEN) != 0) - continue; - victim = label_ent; - list_move_tail(&victim->list, &nd_mapping->labels); - break; - } - if (victim) { - dev_dbg(ndd->dev, "free: %d\n", slot); - slot = to_slot(ndd, victim->label); - nd_label_free_slot(ndd, slot); - victim->label = NULL; + if (test_and_clear_bit(ND_LABEL_REAP, &label_ent->flags) + || memcmp(nspm->uuid, label_ent->label->uuid, + NSLABEL_UUID_LEN) == 0) + reap_victim(nd_mapping, label_ent); } /* update index */ diff --git a/drivers/nvdimm/namespace_devs.c b/drivers/nvdimm/namespace_devs.c index f293556cbbf6..d0214644e334 100644 --- a/drivers/nvdimm/namespace_devs.c +++ b/drivers/nvdimm/namespace_devs.c @@ -1247,12 +1247,27 @@ static int namespace_update_uuid(struct nd_region *nd_region, for (i = 0; i < nd_region->ndr_mappings; i++) { struct nd_mapping *nd_mapping = &nd_region->mapping[i]; struct nvdimm_drvdata *ndd = to_ndd(nd_mapping); + struct nd_label_ent *label_ent; struct resource *res; for_each_dpa_resource(ndd, res) if (strcmp(res->name, old_label_id.id) == 0) sprintf((void *) res->name, "%s", new_label_id.id); + + mutex_lock(&nd_mapping->lock); + list_for_each_entry(label_ent, &nd_mapping->labels, list) { + struct nd_namespace_label *nd_label = label_ent->label; + struct nd_label_id label_id; + + if (!nd_label) + continue; + nd_label_gen_id(&label_id, nd_label->uuid, + __le32_to_cpu(nd_label->flags)); + if (strcmp(old_label_id.id, label_id.id) == 0) + set_bit(ND_LABEL_REAP, &label_ent->flags); + } + mutex_unlock(&nd_mapping->lock); } kfree(*old_uuid); out: diff --git a/drivers/nvdimm/nd.h b/drivers/nvdimm/nd.h index a5ac3b240293..191d62af0e51 100644 --- a/drivers/nvdimm/nd.h +++ b/drivers/nvdimm/nd.h @@ -113,8 +113,12 @@ struct nd_percpu_lane { spinlock_t lock; }; +enum nd_label_flags { + ND_LABEL_REAP, +}; struct nd_label_ent { struct list_head list; + unsigned long flags; struct nd_namespace_label *label; };

5 years, 11 months

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0
0 0

FAILED: patch "[PATCH] libnvdimm/namespace: Fix label tracking error" failed to apply to 4.14-stable tree

by gregkh＠linuxfoundation.org

The patch below does not apply to the 4.14-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <stable(a)vger.kernel.org>. thanks, greg k-h ------------------ original commit in Linus's tree ------------------ >From c4703ce11c23423d4b46e3d59aef7979814fd608 Mon Sep 17 00:00:00 2001 From: Dan Williams <dan.j.williams(a)intel.com> Date: Tue, 30 Apr 2019 21:51:21 -0700 Subject: [PATCH] libnvdimm/namespace: Fix label tracking error Users have reported intermittent occurrences of DIMM initialization failures due to duplicate allocations of address capacity detected in the labels, or errors of the form below, both have the same root cause. nd namespace1.4: failed to track label: 0 WARNING: CPU: 17 PID: 1381 at drivers/nvdimm/label.c:863 RIP: 0010:__pmem_label_update+0x56c/0x590 [libnvdimm] Call Trace: ? nd_pmem_namespace_label_update+0xd6/0x160 [libnvdimm] nd_pmem_namespace_label_update+0xd6/0x160 [libnvdimm] uuid_store+0x17e/0x190 [libnvdimm] kernfs_fop_write+0xf0/0x1a0 vfs_write+0xb7/0x1b0 ksys_write+0x57/0xd0 do_syscall_64+0x60/0x210 Unfortunately those reports were typically with a busy parallel namespace creation / destruction loop making it difficult to see the components of the bug. However, Jane provided a simple reproducer using the work-in-progress sub-section implementation. When ndctl is reconfiguring a namespace it may take an existing defunct / disabled namespace and reconfigure it with a new uuid and other parameters. Critically namespace_update_uuid() takes existing address resources and renames them for the new namespace to use / reconfigure as it sees fit. The bug is that this rename only happens in the resource tracking tree. Existing labels with the old uuid are not reaped leading to a scenario where multiple active labels reference the same span of address range. Teach namespace_update_uuid() to flag any references to the old uuid for reaping at the next label update attempt. Cc: <stable(a)vger.kernel.org> Fixes: bf9bccc14c05 ("libnvdimm: pmem label sets and namespace instantiation") Link: https://github.com/pmem/ndctl/issues/91 Reported-by: Jane Chu <jane.chu(a)oracle.com> Reported-by: Jeff Moyer <jmoyer(a)redhat.com> Reported-by: Erwin Tsaur <erwin.tsaur(a)oracle.com> Cc: Johannes Thumshirn <jthumshirn(a)suse.de> Signed-off-by: Dan Williams <dan.j.williams(a)intel.com> diff --git a/drivers/nvdimm/label.c b/drivers/nvdimm/label.c index f3d753d3169c..2030805aa216 100644 --- a/drivers/nvdimm/label.c +++ b/drivers/nvdimm/label.c @@ -756,6 +756,17 @@ static const guid_t *to_abstraction_guid(enum nvdimm_claim_class claim_class, return &guid_null; } +static void reap_victim(struct nd_mapping *nd_mapping, + struct nd_label_ent *victim) +{ + struct nvdimm_drvdata *ndd = to_ndd(nd_mapping); + u32 slot = to_slot(ndd, victim->label); + + dev_dbg(ndd->dev, "free: %d\n", slot); + nd_label_free_slot(ndd, slot); + victim->label = NULL; +} + static int __pmem_label_update(struct nd_region *nd_region, struct nd_mapping *nd_mapping, struct nd_namespace_pmem *nspm, int pos, unsigned long flags) @@ -763,9 +774,9 @@ static int __pmem_label_update(struct nd_region *nd_region, struct nd_namespace_common *ndns = &nspm->nsio.common; struct nd_interleave_set *nd_set = nd_region->nd_set; struct nvdimm_drvdata *ndd = to_ndd(nd_mapping); - struct nd_label_ent *label_ent, *victim = NULL; struct nd_namespace_label *nd_label; struct nd_namespace_index *nsindex; + struct nd_label_ent *label_ent; struct nd_label_id label_id; struct resource *res; unsigned long *free; @@ -834,18 +845,10 @@ static int __pmem_label_update(struct nd_region *nd_region, list_for_each_entry(label_ent, &nd_mapping->labels, list) { if (!label_ent->label) continue; - if (memcmp(nspm->uuid, label_ent->label->uuid, - NSLABEL_UUID_LEN) != 0) - continue; - victim = label_ent; - list_move_tail(&victim->list, &nd_mapping->labels); - break; - } - if (victim) { - dev_dbg(ndd->dev, "free: %d\n", slot); - slot = to_slot(ndd, victim->label); - nd_label_free_slot(ndd, slot); - victim->label = NULL; + if (test_and_clear_bit(ND_LABEL_REAP, &label_ent->flags) + || memcmp(nspm->uuid, label_ent->label->uuid, + NSLABEL_UUID_LEN) == 0) + reap_victim(nd_mapping, label_ent); } /* update index */ diff --git a/drivers/nvdimm/namespace_devs.c b/drivers/nvdimm/namespace_devs.c index f293556cbbf6..d0214644e334 100644 --- a/drivers/nvdimm/namespace_devs.c +++ b/drivers/nvdimm/namespace_devs.c @@ -1247,12 +1247,27 @@ static int namespace_update_uuid(struct nd_region *nd_region, for (i = 0; i < nd_region->ndr_mappings; i++) { struct nd_mapping *nd_mapping = &nd_region->mapping[i]; struct nvdimm_drvdata *ndd = to_ndd(nd_mapping); + struct nd_label_ent *label_ent; struct resource *res; for_each_dpa_resource(ndd, res) if (strcmp(res->name, old_label_id.id) == 0) sprintf((void *) res->name, "%s", new_label_id.id); + + mutex_lock(&nd_mapping->lock); + list_for_each_entry(label_ent, &nd_mapping->labels, list) { + struct nd_namespace_label *nd_label = label_ent->label; + struct nd_label_id label_id; + + if (!nd_label) + continue; + nd_label_gen_id(&label_id, nd_label->uuid, + __le32_to_cpu(nd_label->flags)); + if (strcmp(old_label_id.id, label_id.id) == 0) + set_bit(ND_LABEL_REAP, &label_ent->flags); + } + mutex_unlock(&nd_mapping->lock); } kfree(*old_uuid); out: diff --git a/drivers/nvdimm/nd.h b/drivers/nvdimm/nd.h index a5ac3b240293..191d62af0e51 100644 --- a/drivers/nvdimm/nd.h +++ b/drivers/nvdimm/nd.h @@ -113,8 +113,12 @@ struct nd_percpu_lane { spinlock_t lock; }; +enum nd_label_flags { + ND_LABEL_REAP, +}; struct nd_label_ent { struct list_head list; + unsigned long flags; struct nd_namespace_label *label; };

5 years, 11 months

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0
0 0

FAILED: patch "[PATCH] xen/pvh: correctly setup the PV EFI interface for dom0" failed to apply to 4.19-stable tree

by gregkh＠linuxfoundation.org

The patch below does not apply to the 4.19-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <stable(a)vger.kernel.org>. thanks, greg k-h ------------------ original commit in Linus's tree ------------------ >From 72813bfbf0276a97c82af038efb5f02dcdd9e310 Mon Sep 17 00:00:00 2001 From: Roger Pau Monne <roger.pau(a)citrix.com> Date: Tue, 23 Apr 2019 15:04:16 +0200 Subject: [PATCH] xen/pvh: correctly setup the PV EFI interface for dom0 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit This involves initializing the boot params EFI related fields and the efi global variable. Without this fix a PVH dom0 doesn't detect when booted from EFI, and thus doesn't support accessing any of the EFI related data. Reported-by: PGNet Dev <pgnet.dev(a)gmail.com> Signed-off-by: Roger Pau Monné <roger.pau(a)citrix.com> Reviewed-by: Boris Ostrovsky <boris.ostrovsky(a)oracle.com> Signed-off-by: Boris Ostrovsky <boris.ostrovsky(a)oracle.com> Cc: stable(a)vger.kernel.org # 4.19+ diff --git a/arch/x86/platform/pvh/enlighten.c b/arch/x86/platform/pvh/enlighten.c index 62f5c7045944..1861a2ba0f2b 100644 --- a/arch/x86/platform/pvh/enlighten.c +++ b/arch/x86/platform/pvh/enlighten.c @@ -44,8 +44,6 @@ void __init __weak mem_map_via_hcall(struct boot_params *ptr __maybe_unused) static void __init init_pvh_bootparams(bool xen_guest) { - memset(&pvh_bootparams, 0, sizeof(pvh_bootparams)); - if ((pvh_start_info.version > 0) && (pvh_start_info.memmap_entries)) { struct hvm_memmap_table_entry *ep; int i; @@ -103,7 +101,7 @@ static void __init init_pvh_bootparams(bool xen_guest) * If we are trying to boot a Xen PVH guest, it is expected that the kernel * will have been configured to provide the required override for this routine. */ -void __init __weak xen_pvh_init(void) +void __init __weak xen_pvh_init(struct boot_params *boot_params) { xen_raw_printk("Error: Missing xen PVH initialization\n"); BUG(); @@ -112,7 +110,7 @@ void __init __weak xen_pvh_init(void) static void hypervisor_specific_init(bool xen_guest) { if (xen_guest) - xen_pvh_init(); + xen_pvh_init(&pvh_bootparams); } /* @@ -131,6 +129,8 @@ void __init xen_prepare_pvh(void) BUG(); } + memset(&pvh_bootparams, 0, sizeof(pvh_bootparams)); + hypervisor_specific_init(xen_guest); init_pvh_bootparams(xen_guest); diff --git a/arch/x86/xen/efi.c b/arch/x86/xen/efi.c index 1fbb629a9d78..0d3365cb64de 100644 --- a/arch/x86/xen/efi.c +++ b/arch/x86/xen/efi.c @@ -158,7 +158,7 @@ static enum efi_secureboot_mode xen_efi_get_secureboot(void) return efi_secureboot_mode_unknown; } -void __init xen_efi_init(void) +void __init xen_efi_init(struct boot_params *boot_params) { efi_system_table_t *efi_systab_xen; @@ -167,12 +167,12 @@ void __init xen_efi_init(void) if (efi_systab_xen == NULL) return; - strncpy((char *)&boot_params.efi_info.efi_loader_signature, "Xen", - sizeof(boot_params.efi_info.efi_loader_signature)); - boot_params.efi_info.efi_systab = (__u32)__pa(efi_systab_xen); - boot_params.efi_info.efi_systab_hi = (__u32)(__pa(efi_systab_xen) >> 32); + strncpy((char *)&boot_params->efi_info.efi_loader_signature, "Xen", + sizeof(boot_params->efi_info.efi_loader_signature)); + boot_params->efi_info.efi_systab = (__u32)__pa(efi_systab_xen); + boot_params->efi_info.efi_systab_hi = (__u32)(__pa(efi_systab_xen) >> 32); - boot_params.secure_boot = xen_efi_get_secureboot(); + boot_params->secure_boot = xen_efi_get_secureboot(); set_bit(EFI_BOOT, &efi.flags); set_bit(EFI_PARAVIRT, &efi.flags); diff --git a/arch/x86/xen/enlighten_pv.c b/arch/x86/xen/enlighten_pv.c index c54a493e139a..4722ba2966ac 100644 --- a/arch/x86/xen/enlighten_pv.c +++ b/arch/x86/xen/enlighten_pv.c @@ -1403,7 +1403,7 @@ asmlinkage __visible void __init xen_start_kernel(void) /* We need this for printk timestamps */ xen_setup_runstate_info(0); - xen_efi_init(); + xen_efi_init(&boot_params); /* Start the world */ #ifdef CONFIG_X86_32 diff --git a/arch/x86/xen/enlighten_pvh.c b/arch/x86/xen/enlighten_pvh.c index bbffa409e0e8..80a79db72fcf 100644 --- a/arch/x86/xen/enlighten_pvh.c +++ b/arch/x86/xen/enlighten_pvh.c @@ -13,6 +13,8 @@ #include <xen/interface/memory.h> +#include "xen-ops.h" + /* * PVH variables. * @@ -21,7 +23,7 @@ */ bool xen_pvh __attribute__((section(".data"))) = 0; -void __init xen_pvh_init(void) +void __init xen_pvh_init(struct boot_params *boot_params) { u32 msr; u64 pfn; @@ -33,6 +35,8 @@ void __init xen_pvh_init(void) msr = cpuid_ebx(xen_cpuid_base() + 2); pfn = __pa(hypercall_page); wrmsr_safe(msr, (u32)pfn, (u32)(pfn >> 32)); + + xen_efi_init(boot_params); } void __init mem_map_via_hcall(struct boot_params *boot_params_p) diff --git a/arch/x86/xen/xen-ops.h b/arch/x86/xen/xen-ops.h index 0e60bd918695..2f111f47ba98 100644 --- a/arch/x86/xen/xen-ops.h +++ b/arch/x86/xen/xen-ops.h @@ -122,9 +122,9 @@ static inline void __init xen_init_vga(const struct dom0_vga_console_info *info, void __init xen_init_apic(void); #ifdef CONFIG_XEN_EFI -extern void xen_efi_init(void); +extern void xen_efi_init(struct boot_params *boot_params); #else -static inline void __init xen_efi_init(void) +static inline void __init xen_efi_init(struct boot_params *boot_params) { } #endif

5 years, 11 months

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FAILED: patch "[PATCH] jbd2: fix potential double free" failed to apply to 4.4-stable tree

by gregkh＠linuxfoundation.org

The patch below does not apply to the 4.4-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <stable(a)vger.kernel.org>. thanks, greg k-h ------------------ original commit in Linus's tree ------------------ >From 0d52154bb0a700abb459a2cbce0a30fc2549b67e Mon Sep 17 00:00:00 2001 From: Chengguang Xu <cgxu519(a)gmail.com> Date: Fri, 10 May 2019 21:15:47 -0400 Subject: [PATCH] jbd2: fix potential double free When failing from creating cache jbd2_inode_cache, we will destroy the previously created cache jbd2_handle_cache twice. This patch fixes this by moving each cache initialization/destruction to its own separate, individual function. Signed-off-by: Chengguang Xu <cgxu519(a)gmail.com> Signed-off-by: Theodore Ts'o <tytso(a)mit.edu> Cc: stable(a)kernel.org diff --git a/fs/jbd2/journal.c b/fs/jbd2/journal.c index 37e16d969925..43df0c943229 100644 --- a/fs/jbd2/journal.c +++ b/fs/jbd2/journal.c @@ -2375,22 +2375,19 @@ static struct kmem_cache *jbd2_journal_head_cache; static atomic_t nr_journal_heads = ATOMIC_INIT(0); #endif -static int jbd2_journal_init_journal_head_cache(void) +static int __init jbd2_journal_init_journal_head_cache(void) { - int retval; - - J_ASSERT(jbd2_journal_head_cache == NULL); + J_ASSERT(!jbd2_journal_head_cache); jbd2_journal_head_cache = kmem_cache_create("jbd2_journal_head", sizeof(struct journal_head), 0, /* offset */ SLAB_TEMPORARY | SLAB_TYPESAFE_BY_RCU, NULL); /* ctor */ - retval = 0; if (!jbd2_journal_head_cache) { - retval = -ENOMEM; printk(KERN_EMERG "JBD2: no memory for journal_head cache\n"); + return -ENOMEM; } - return retval; + return 0; } static void jbd2_journal_destroy_journal_head_cache(void) @@ -2636,28 +2633,38 @@ static void __exit jbd2_remove_jbd_stats_proc_entry(void) struct kmem_cache *jbd2_handle_cache, *jbd2_inode_cache; +static int __init jbd2_journal_init_inode_cache(void) +{ + J_ASSERT(!jbd2_inode_cache); + jbd2_inode_cache = KMEM_CACHE(jbd2_inode, 0); + if (!jbd2_inode_cache) { + pr_emerg("JBD2: failed to create inode cache\n"); + return -ENOMEM; + } + return 0; +} + static int __init jbd2_journal_init_handle_cache(void) { + J_ASSERT(!jbd2_handle_cache); jbd2_handle_cache = KMEM_CACHE(jbd2_journal_handle, SLAB_TEMPORARY); - if (jbd2_handle_cache == NULL) { + if (!jbd2_handle_cache) { printk(KERN_EMERG "JBD2: failed to create handle cache\n"); return -ENOMEM; } - jbd2_inode_cache = KMEM_CACHE(jbd2_inode, 0); - if (jbd2_inode_cache == NULL) { - printk(KERN_EMERG "JBD2: failed to create inode cache\n"); - kmem_cache_destroy(jbd2_handle_cache); - return -ENOMEM; - } return 0; } +static void jbd2_journal_destroy_inode_cache(void) +{ + kmem_cache_destroy(jbd2_inode_cache); + jbd2_inode_cache = NULL; +} + static void jbd2_journal_destroy_handle_cache(void) { kmem_cache_destroy(jbd2_handle_cache); jbd2_handle_cache = NULL; - kmem_cache_destroy(jbd2_inode_cache); - jbd2_inode_cache = NULL; } /* @@ -2668,11 +2675,15 @@ static int __init journal_init_caches(void) { int ret; - ret = jbd2_journal_init_revoke_caches(); + ret = jbd2_journal_init_revoke_record_cache(); + if (ret == 0) + ret = jbd2_journal_init_revoke_table_cache(); if (ret == 0) ret = jbd2_journal_init_journal_head_cache(); if (ret == 0) ret = jbd2_journal_init_handle_cache(); + if (ret == 0) + ret = jbd2_journal_init_inode_cache(); if (ret == 0) ret = jbd2_journal_init_transaction_cache(); return ret; @@ -2680,9 +2691,11 @@ static int __init journal_init_caches(void) static void jbd2_journal_destroy_caches(void) { - jbd2_journal_destroy_revoke_caches(); + jbd2_journal_destroy_revoke_record_cache(); + jbd2_journal_destroy_revoke_table_cache(); jbd2_journal_destroy_journal_head_cache(); jbd2_journal_destroy_handle_cache(); + jbd2_journal_destroy_inode_cache(); jbd2_journal_destroy_transaction_cache(); jbd2_journal_destroy_slabs(); } diff --git a/fs/jbd2/revoke.c b/fs/jbd2/revoke.c index a1143e57a718..69b9bc329964 100644 --- a/fs/jbd2/revoke.c +++ b/fs/jbd2/revoke.c @@ -178,33 +178,41 @@ static struct jbd2_revoke_record_s *find_revoke_record(journal_t *journal, return NULL; } -void jbd2_journal_destroy_revoke_caches(void) +void jbd2_journal_destroy_revoke_record_cache(void) { kmem_cache_destroy(jbd2_revoke_record_cache); jbd2_revoke_record_cache = NULL; +} + +void jbd2_journal_destroy_revoke_table_cache(void) +{ kmem_cache_destroy(jbd2_revoke_table_cache); jbd2_revoke_table_cache = NULL; } -int __init jbd2_journal_init_revoke_caches(void) +int __init jbd2_journal_init_revoke_record_cache(void) { J_ASSERT(!jbd2_revoke_record_cache); - J_ASSERT(!jbd2_revoke_table_cache); - jbd2_revoke_record_cache = KMEM_CACHE(jbd2_revoke_record_s, SLAB_HWCACHE_ALIGN|SLAB_TEMPORARY); - if (!jbd2_revoke_record_cache) - goto record_cache_failure; + if (!jbd2_revoke_record_cache) { + pr_emerg("JBD2: failed to create revoke_record cache\n"); + return -ENOMEM; + } + return 0; +} + +int __init jbd2_journal_init_revoke_table_cache(void) +{ + J_ASSERT(!jbd2_revoke_table_cache); jbd2_revoke_table_cache = KMEM_CACHE(jbd2_revoke_table_s, SLAB_TEMPORARY); - if (!jbd2_revoke_table_cache) - goto table_cache_failure; - return 0; -table_cache_failure: - jbd2_journal_destroy_revoke_caches(); -record_cache_failure: + if (!jbd2_revoke_table_cache) { + pr_emerg("JBD2: failed to create revoke_table cache\n"); return -ENOMEM; + } + return 0; } static struct jbd2_revoke_table_s *jbd2_journal_init_revoke_table(int hash_size) diff --git a/fs/jbd2/transaction.c b/fs/jbd2/transaction.c index f940d31c2adc..8ca4fddc705f 100644 --- a/fs/jbd2/transaction.c +++ b/fs/jbd2/transaction.c @@ -42,9 +42,11 @@ int __init jbd2_journal_init_transaction_cache(void) 0, SLAB_HWCACHE_ALIGN|SLAB_TEMPORARY, NULL); - if (transaction_cache) - return 0; - return -ENOMEM; + if (!transaction_cache) { + pr_emerg("JBD2: failed to create transaction cache\n"); + return -ENOMEM; + } + return 0; } void jbd2_journal_destroy_transaction_cache(void) diff --git a/include/linux/jbd2.h b/include/linux/jbd2.h index 0f919d5fe84f..2cf6e04b08fc 100644 --- a/include/linux/jbd2.h +++ b/include/linux/jbd2.h @@ -1318,7 +1318,7 @@ extern void __wait_on_journal (journal_t *); /* Transaction cache support */ extern void jbd2_journal_destroy_transaction_cache(void); -extern int jbd2_journal_init_transaction_cache(void); +extern int __init jbd2_journal_init_transaction_cache(void); extern void jbd2_journal_free_transaction(transaction_t *); /* @@ -1446,8 +1446,10 @@ static inline void jbd2_free_inode(struct jbd2_inode *jinode) /* Primary revoke support */ #define JOURNAL_REVOKE_DEFAULT_HASH 256 extern int jbd2_journal_init_revoke(journal_t *, int); -extern void jbd2_journal_destroy_revoke_caches(void); -extern int jbd2_journal_init_revoke_caches(void); +extern void jbd2_journal_destroy_revoke_record_cache(void); +extern void jbd2_journal_destroy_revoke_table_cache(void); +extern int __init jbd2_journal_init_revoke_record_cache(void); +extern int __init jbd2_journal_init_revoke_table_cache(void); extern void jbd2_journal_destroy_revoke(journal_t *); extern int jbd2_journal_revoke (handle_t *, unsigned long long, struct buffer_head *);

5 years, 11 months

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FAILED: patch "[PATCH] jbd2: fix potential double free" failed to apply to 4.9-stable tree

by gregkh＠linuxfoundation.org

The patch below does not apply to the 4.9-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <stable(a)vger.kernel.org>. thanks, greg k-h ------------------ original commit in Linus's tree ------------------ >From 0d52154bb0a700abb459a2cbce0a30fc2549b67e Mon Sep 17 00:00:00 2001 From: Chengguang Xu <cgxu519(a)gmail.com> Date: Fri, 10 May 2019 21:15:47 -0400 Subject: [PATCH] jbd2: fix potential double free When failing from creating cache jbd2_inode_cache, we will destroy the previously created cache jbd2_handle_cache twice. This patch fixes this by moving each cache initialization/destruction to its own separate, individual function. Signed-off-by: Chengguang Xu <cgxu519(a)gmail.com> Signed-off-by: Theodore Ts'o <tytso(a)mit.edu> Cc: stable(a)kernel.org diff --git a/fs/jbd2/journal.c b/fs/jbd2/journal.c index 37e16d969925..43df0c943229 100644 --- a/fs/jbd2/journal.c +++ b/fs/jbd2/journal.c @@ -2375,22 +2375,19 @@ static struct kmem_cache *jbd2_journal_head_cache; static atomic_t nr_journal_heads = ATOMIC_INIT(0); #endif -static int jbd2_journal_init_journal_head_cache(void) +static int __init jbd2_journal_init_journal_head_cache(void) { - int retval; - - J_ASSERT(jbd2_journal_head_cache == NULL); + J_ASSERT(!jbd2_journal_head_cache); jbd2_journal_head_cache = kmem_cache_create("jbd2_journal_head", sizeof(struct journal_head), 0, /* offset */ SLAB_TEMPORARY | SLAB_TYPESAFE_BY_RCU, NULL); /* ctor */ - retval = 0; if (!jbd2_journal_head_cache) { - retval = -ENOMEM; printk(KERN_EMERG "JBD2: no memory for journal_head cache\n"); + return -ENOMEM; } - return retval; + return 0; } static void jbd2_journal_destroy_journal_head_cache(void) @@ -2636,28 +2633,38 @@ static void __exit jbd2_remove_jbd_stats_proc_entry(void) struct kmem_cache *jbd2_handle_cache, *jbd2_inode_cache; +static int __init jbd2_journal_init_inode_cache(void) +{ + J_ASSERT(!jbd2_inode_cache); + jbd2_inode_cache = KMEM_CACHE(jbd2_inode, 0); + if (!jbd2_inode_cache) { + pr_emerg("JBD2: failed to create inode cache\n"); + return -ENOMEM; + } + return 0; +} + static int __init jbd2_journal_init_handle_cache(void) { + J_ASSERT(!jbd2_handle_cache); jbd2_handle_cache = KMEM_CACHE(jbd2_journal_handle, SLAB_TEMPORARY); - if (jbd2_handle_cache == NULL) { + if (!jbd2_handle_cache) { printk(KERN_EMERG "JBD2: failed to create handle cache\n"); return -ENOMEM; } - jbd2_inode_cache = KMEM_CACHE(jbd2_inode, 0); - if (jbd2_inode_cache == NULL) { - printk(KERN_EMERG "JBD2: failed to create inode cache\n"); - kmem_cache_destroy(jbd2_handle_cache); - return -ENOMEM; - } return 0; } +static void jbd2_journal_destroy_inode_cache(void) +{ + kmem_cache_destroy(jbd2_inode_cache); + jbd2_inode_cache = NULL; +} + static void jbd2_journal_destroy_handle_cache(void) { kmem_cache_destroy(jbd2_handle_cache); jbd2_handle_cache = NULL; - kmem_cache_destroy(jbd2_inode_cache); - jbd2_inode_cache = NULL; } /* @@ -2668,11 +2675,15 @@ static int __init journal_init_caches(void) { int ret; - ret = jbd2_journal_init_revoke_caches(); + ret = jbd2_journal_init_revoke_record_cache(); + if (ret == 0) + ret = jbd2_journal_init_revoke_table_cache(); if (ret == 0) ret = jbd2_journal_init_journal_head_cache(); if (ret == 0) ret = jbd2_journal_init_handle_cache(); + if (ret == 0) + ret = jbd2_journal_init_inode_cache(); if (ret == 0) ret = jbd2_journal_init_transaction_cache(); return ret; @@ -2680,9 +2691,11 @@ static int __init journal_init_caches(void) static void jbd2_journal_destroy_caches(void) { - jbd2_journal_destroy_revoke_caches(); + jbd2_journal_destroy_revoke_record_cache(); + jbd2_journal_destroy_revoke_table_cache(); jbd2_journal_destroy_journal_head_cache(); jbd2_journal_destroy_handle_cache(); + jbd2_journal_destroy_inode_cache(); jbd2_journal_destroy_transaction_cache(); jbd2_journal_destroy_slabs(); } diff --git a/fs/jbd2/revoke.c b/fs/jbd2/revoke.c index a1143e57a718..69b9bc329964 100644 --- a/fs/jbd2/revoke.c +++ b/fs/jbd2/revoke.c @@ -178,33 +178,41 @@ static struct jbd2_revoke_record_s *find_revoke_record(journal_t *journal, return NULL; } -void jbd2_journal_destroy_revoke_caches(void) +void jbd2_journal_destroy_revoke_record_cache(void) { kmem_cache_destroy(jbd2_revoke_record_cache); jbd2_revoke_record_cache = NULL; +} + +void jbd2_journal_destroy_revoke_table_cache(void) +{ kmem_cache_destroy(jbd2_revoke_table_cache); jbd2_revoke_table_cache = NULL; } -int __init jbd2_journal_init_revoke_caches(void) +int __init jbd2_journal_init_revoke_record_cache(void) { J_ASSERT(!jbd2_revoke_record_cache); - J_ASSERT(!jbd2_revoke_table_cache); - jbd2_revoke_record_cache = KMEM_CACHE(jbd2_revoke_record_s, SLAB_HWCACHE_ALIGN|SLAB_TEMPORARY); - if (!jbd2_revoke_record_cache) - goto record_cache_failure; + if (!jbd2_revoke_record_cache) { + pr_emerg("JBD2: failed to create revoke_record cache\n"); + return -ENOMEM; + } + return 0; +} + +int __init jbd2_journal_init_revoke_table_cache(void) +{ + J_ASSERT(!jbd2_revoke_table_cache); jbd2_revoke_table_cache = KMEM_CACHE(jbd2_revoke_table_s, SLAB_TEMPORARY); - if (!jbd2_revoke_table_cache) - goto table_cache_failure; - return 0; -table_cache_failure: - jbd2_journal_destroy_revoke_caches(); -record_cache_failure: + if (!jbd2_revoke_table_cache) { + pr_emerg("JBD2: failed to create revoke_table cache\n"); return -ENOMEM; + } + return 0; } static struct jbd2_revoke_table_s *jbd2_journal_init_revoke_table(int hash_size) diff --git a/fs/jbd2/transaction.c b/fs/jbd2/transaction.c index f940d31c2adc..8ca4fddc705f 100644 --- a/fs/jbd2/transaction.c +++ b/fs/jbd2/transaction.c @@ -42,9 +42,11 @@ int __init jbd2_journal_init_transaction_cache(void) 0, SLAB_HWCACHE_ALIGN|SLAB_TEMPORARY, NULL); - if (transaction_cache) - return 0; - return -ENOMEM; + if (!transaction_cache) { + pr_emerg("JBD2: failed to create transaction cache\n"); + return -ENOMEM; + } + return 0; } void jbd2_journal_destroy_transaction_cache(void) diff --git a/include/linux/jbd2.h b/include/linux/jbd2.h index 0f919d5fe84f..2cf6e04b08fc 100644 --- a/include/linux/jbd2.h +++ b/include/linux/jbd2.h @@ -1318,7 +1318,7 @@ extern void __wait_on_journal (journal_t *); /* Transaction cache support */ extern void jbd2_journal_destroy_transaction_cache(void); -extern int jbd2_journal_init_transaction_cache(void); +extern int __init jbd2_journal_init_transaction_cache(void); extern void jbd2_journal_free_transaction(transaction_t *); /* @@ -1446,8 +1446,10 @@ static inline void jbd2_free_inode(struct jbd2_inode *jinode) /* Primary revoke support */ #define JOURNAL_REVOKE_DEFAULT_HASH 256 extern int jbd2_journal_init_revoke(journal_t *, int); -extern void jbd2_journal_destroy_revoke_caches(void); -extern int jbd2_journal_init_revoke_caches(void); +extern void jbd2_journal_destroy_revoke_record_cache(void); +extern void jbd2_journal_destroy_revoke_table_cache(void); +extern int __init jbd2_journal_init_revoke_record_cache(void); +extern int __init jbd2_journal_init_revoke_table_cache(void); extern void jbd2_journal_destroy_revoke(journal_t *); extern int jbd2_journal_revoke (handle_t *, unsigned long long, struct buffer_head *);

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