September 2025 - Linux-stable-mirror

[DISCUSSION] Fixing bad pmd due to a race condition between change_prot_numa() and THP migration in pre-6.5 kernels.

by Harry Yoo

Hi. This is supposed to be a patch, but I think it's worth discussing how it should be backported to -stable, so I've labeled it as [DISCUSSION]. The bug described below was unintentionally fixed in v6.5 and not backported to -stable. So technically I would need to use "Option 3" [A], but since the original patch [B] did not intend to fix a bug (and it's also part of a larger patch series), it looks quite different from the patch below, and I'm not sure what the backport should look like. I think there are probably two options: 1. Provide the description of the original patch along with a very long, detailed explanation of why the patch deviates from the upstream version, or 2. Post the patch below with a clarification that it was fixed upstream by commit 670ddd8cdcbd1. Any thoughts? [A] https://www.kernel.org/doc/html/latest/process/stable-kernel-rules.html#opt… [B] https://lkml.kernel.org/r/725a42a9-91e9-c868-925-e3a5fd40bb4f@google.com (Upstream commit 670ddd8cdcbd1) In any case, no matter how we backport this, it needs some review and feedback would be appreciated. The patch applies to v6.1 and v5.15, and v5.10 but not v5.4. From cf45867ab8e48b42160b7253390db7bdecef1455 Mon Sep 17 00:00:00 2001 From: Harry Yoo <harry.yoo(a)oracle.com> Date: Thu, 11 Sep 2025 20:05:40 +0900 Subject: [PATCH] mm, numa: fix bad pmd by atomically checking is_swap_pmd() in change_prot_numa() It was observed that a bad pmd is seen when automatic NUMA balancing is marking page table entries as prot_numa: [2437548.196018] mm/pgtable-generic.c:50: bad pmd 00000000af22fc02(dffffffe71fbfe02) With some kernel modification, the call stack was dumped: [2437548.235022] Call Trace: [2437548.238234] <TASK> [2437548.241060] dump_stack_lvl+0x46/0x61 [2437548.245689] panic+0x106/0x2e5 [2437548.249497] pmd_clear_bad+0x3c/0x3c [2437548.253967] change_pmd_range.isra.0+0x34d/0x3a7 [2437548.259537] change_p4d_range+0x156/0x20e [2437548.264392] change_protection_range+0x116/0x1a9 [2437548.269976] change_prot_numa+0x15/0x37 [2437548.274774] task_numa_work+0x1b8/0x302 [2437548.279512] task_work_run+0x62/0x95 [2437548.283882] exit_to_user_mode_loop+0x1a4/0x1a9 [2437548.289277] exit_to_user_mode_prepare+0xf4/0xfc [2437548.294751] ? sysvec_apic_timer_interrupt+0x34/0x81 [2437548.300677] irqentry_exit_to_user_mode+0x5/0x25 [2437548.306153] asm_sysvec_apic_timer_interrupt+0x16/0x1b This is due to a race condition between change_prot_numa() and THP migration because the kernel doesn't check is_swap_pmd() and pmd_trans_huge() atomically: change_prot_numa() THP migration ====================================================================== - change_pmd_range() -> is_swap_pmd() returns false, meaning it's not a PMD migration entry. - do_huge_pmd_numa_page() -> migrate_misplaced_page() sets migration entries for the THP. - change_pmd_range() -> pmd_none_or_clear_bad_unless_trans_huge() -> pmd_none() and pmd_trans_huge() returns false - pmd_none_or_clear_bad_unless_trans_huge() -> pmd_bad() returns true for the migration entry! For the race condition described above to occur: 1) AutoNUMA must be unmapping a range of pages, with at least part of the range already unmapped by AutoNUMA. 2) While AutoNUMA is in the process of unmapping, a NUMA hinting fault occurs within that range, specifically when we are about to unmap the PMD entry, between the is_swap_pmd() and pmd_trans_huge() checks. So this is a really rare race condition and it's observed that it takes usually a few days of autonuma-intensive testing to trigger. A bit of history on a similar race condition in the past: In fact, a similar race condition caused by not checking pmd_trans_huge() atomically was reported [1] in 2017. However, instead of the patch [1], another patch series [3] fixed the problem [2] by not clearing the pmd entry but invaliding it instead (so that pmd_trans_huge() would still return true). Despite patch series [3], the bad pmd error continued to be reported in mainline. As a result, [1] was resurrected [4] and it landed mainline in 2020 in a hope that it would resolve the issue. However, now it turns out that [3] was not sufficient. Fix this race condition by checking is_swap_pmd() and pmd_trans_huge() atomically. With that, the kernel should see either pmd_trans_huge() == true, or is_swap_pmd() == true when another task is migrating the page concurrently. This bug was introduced when THP migration support was added. More specifically, by commit 84c3fc4e9c56 ("mm: thp: check pmd migration entry in common path")). It is unintentionally fixed since v6.5 by commit 670ddd8cdcbd1 ("mm/mprotect: delete pmd_none_or_clear_bad_unless_trans_huge()") while removing pmd_none_or_clear_bad_unless_trans_huge() function. But it's not backported to -stable because it was fixed unintentionally. Link: https://lore.kernel.org/linux-mm/20170410094825.2yfo5zehn7pchg6a@techsingul… [1] Link: https://lore.kernel.org/linux-mm/8A6309F4-DB76-48FA-BE7F-BF9536A4C4E5@cs.ru… [2] Link: https://lore.kernel.org/linux-mm/20170302151034.27829-1-kirill.shutemov@lin… [3] Link: https://lore.kernel.org/linux-mm/20200216191800.22423-1-aquini@redhat.com [4] Fixes: 84c3fc4e9c56 ("mm: thp: check pmd migration entry in common path") Signed-off-by: Harry Yoo <harry.yoo(a)oracle.com> --- mm/mprotect.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/mm/mprotect.c b/mm/mprotect.c index 668bfaa6ed2a..c0e796c0f9b0 100644 --- a/mm/mprotect.c +++ b/mm/mprotect.c @@ -303,7 +303,7 @@ static inline int pmd_none_or_clear_bad_unless_trans_huge(pmd_t *pmd) if (pmd_none(pmdval)) return 1; - if (pmd_trans_huge(pmdval)) + if (is_swap_pmd(pmdval) || pmd_trans_huge(pmdval)) return 0; if (unlikely(pmd_bad(pmdval))) { pmd_clear_bad(pmd); @@ -373,7 +373,7 @@ static inline unsigned long change_pmd_range(struct mmu_gather *tlb, * Hence, it's necessary to atomically read the PMD value * for all the checks. */ - if (!is_swap_pmd(*pmd) && !pmd_devmap(*pmd) && + if (!pmd_devmap(*pmd) && pmd_none_or_clear_bad_unless_trans_huge(pmd)) goto next; -- 2.43.0

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[PATCH 6.12 000/140] 6.12.48-rc1 review

by Greg Kroah-Hartman

This is the start of the stable review cycle for the 6.12.48 release. There are 140 patches in this series, all will be posted as a response to this one. If anyone has any issues with these being applied, please let me know. Responses should be made by Fri, 19 Sep 2025 12:32:53 +0000. Anything received after that time might be too late. The whole patch series can be found in one patch at: https://www.kernel.org/pub/linux/kernel/v6.x/stable-review/patch-6.12.48-rc… or in the git tree and branch at: git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git linux-6.12.y and the diffstat can be found below. thanks, greg k-h ------------- Pseudo-Shortlog of commits: Greg Kroah-Hartman <gregkh(a)linuxfoundation.org> Linux 6.12.48-rc1 Alex Deucher <alexander.deucher(a)amd.com> drm/amdgpu: fix a memory leak in fence cleanup when unloading Jani Nikula <jani.nikula(a)intel.com> drm/i915/power: fix size for for_each_set_bit() in abox iteration Buday Csaba <buday.csaba(a)prolan.hu> net: mdiobus: release reset_gpio in mdiobus_unregister_device() K Prateek Nayak <kprateek.nayak(a)amd.com> x86/cpu/topology: Always try cpu_parse_topology_ext() on AMD/Hygon Johan Hovold <johan(a)kernel.org> phy: ti-pipe3: fix device leak at unbind Johan Hovold <johan(a)kernel.org> phy: ti: omap-usb2: fix device leak at unbind Johan Hovold <johan(a)kernel.org> phy: tegra: xusb: fix device and OF node leak at probe Miaoqian Lin <linmq006(a)gmail.com> dmaengine: dw: dmamux: Fix device reference leak in rzn1_dmamux_route_allocate Stephan Gerhold <stephan.gerhold(a)linaro.org> dmaengine: qcom: bam_dma: Fix DT error handling for num-channels/ees Takashi Iwai <tiwai(a)suse.de> usb: gadget: midi2: Fix MIDI2 IN EP max packet size Takashi Iwai <tiwai(a)suse.de> usb: gadget: midi2: Fix missing UMP group attributes initialization RD Babiera <rdbabiera(a)google.com> usb: typec: tcpm: properly deliver cable vdms to altmode drivers Alan Stern <stern(a)rowland.harvard.edu> USB: gadget: dummy-hcd: Fix locking bug in RT-enabled kernels Mathias Nyman <mathias.nyman(a)linux.intel.com> xhci: fix memory leak regression when freeing xhci vdev devices depth first Palmer Dabbelt <palmer(a)rivosinc.com> RISC-V: Remove unnecessary include from compat.h Andreas Kemnade <akemnade(a)kernel.org> regulator: sy7636a: fix lifecycle of power good gpio Anders Roxell <anders.roxell(a)linaro.org> dmaengine: ti: edma: Fix memory allocation size for queue_priority_map Dan Carpenter <dan.carpenter(a)linaro.org> dmaengine: idxd: Fix double free in idxd_setup_wqs() Yi Sun <yi.sun(a)intel.com> dmaengine: idxd: Fix refcount underflow on module unload Yi Sun <yi.sun(a)intel.com> dmaengine: idxd: Remove improper idxd_free Pengyu Luo <mitltlatltl(a)gmail.com> phy: qualcomm: phy-qcom-eusb2-repeater: fix override properties Hangbin Liu <liuhangbin(a)gmail.com> hsr: use hsr_for_each_port_rtnl in hsr_port_get_hsr Hangbin Liu <liuhangbin(a)gmail.com> hsr: use rtnl lock when iterating over ports Murali Karicheri <m-karicheri2(a)ti.com> net: hsr: Add VLAN CTAG filter support Florian Westphal <fw(a)strlen.de> netfilter: nf_tables: restart set lookup on base_seq change Florian Westphal <fw(a)strlen.de> netfilter: nf_tables: make nft_set_do_lookup available unconditionally Florian Westphal <fw(a)strlen.de> netfilter: nf_tables: place base_seq in struct net Phil Sutter <phil(a)nwl.cc> netfilter: nf_tables: Reintroduce shortened deletion notifications Florian Westphal <fw(a)strlen.de> netfilter: nft_set_rbtree: continue traversal if element is inactive Florian Westphal <fw(a)strlen.de> netfilter: nft_set_pipapo: don't check genbit from packetpath lookups Florian Westphal <fw(a)strlen.de> netfilter: nft_set_pipapo: don't return bogus extension pointer Florian Westphal <fw(a)strlen.de> netfilter: nft_set_pipapo: merge pipapo_get/lookup Florian Westphal <fw(a)strlen.de> netfilter: nft_set: remove one argument from lookup and update functions Florian Westphal <fw(a)strlen.de> netfilter: nft_set_pipapo: remove unused arguments Anssi Hannula <anssi.hannula(a)bitwise.fi> can: xilinx_can: xcan_write_frame(): fix use-after-free of transmitted SKB Tetsuo Handa <penguin-kernel(a)I-love.SAKURA.ne.jp> can: j1939: j1939_local_ecu_get(): undo increment when j1939_local_ecu_get() fails Tetsuo Handa <penguin-kernel(a)I-love.SAKURA.ne.jp> can: j1939: j1939_sk_bind(): call j1939_priv_put() immediately when j1939_local_ecu_get() failed Alex Deucher <alexander.deucher(a)amd.com> drm/amd/display: use udelay rather than fsleep Michal Schmidt <mschmidt(a)redhat.com> i40e: fix IRQ freeing in i40e_vsi_request_irq_msix error path Kohei Enju <enjuk(a)amazon.com> igb: fix link test skipping when interface is admin down Alex Tran <alex.t.tran(a)gmail.com> docs: networking: can: change bcm_msg_head frames member to support flexible array Antoine Tenart <atenart(a)kernel.org> tunnels: reset the GSO metadata before reusing the skb Petr Machata <petrm(a)nvidia.com> net: bridge: Bounce invalid boolopts Alok Tiwari <alok.a.tiwari(a)oracle.com> genetlink: fix genl_bind() invoking bind() after -EPERM Stefan Wahren <wahrenst(a)gmx.net> net: fec: Fix possible NPD in fec_enet_phy_reset_after_clk_enable() Chia-I Wu <olvaffe(a)gmail.com> drm/panthor: validate group queue count Linus Torvalds <torvalds(a)linux-foundation.org> Disable SLUB_TINY for build testing Fabio Porcedda <fabio.porcedda(a)gmail.com> USB: serial: option: add Telit Cinterion LE910C4-WWX new compositions Fabio Porcedda <fabio.porcedda(a)gmail.com> USB: serial: option: add Telit Cinterion FN990A w/audio compositions Krzysztof Kozlowski <krzysztof.kozlowski(a)linaro.org> dt-bindings: serial: brcm,bcm7271-uart: Constrain clocks Hugo Villeneuve <hvilleneuve(a)dimonoff.com> serial: sc16is7xx: fix bug in flow control levels init Fabian Vogt <fvogt(a)suse.de> tty: hvc_console: Call hvc_kick in hvc_write unconditionally Paolo Abeni <pabeni(a)redhat.com> Revert "net: usb: asix: ax88772: drop phylink use in PM to avoid MDIO runtime PM wakeups" Christoffer Sandberg <cs(a)tuxedo.de> Input: i8042 - add TUXEDO InfinityBook Pro Gen10 AMD to i8042 quirk table Jeff LaBundy <jeff(a)labundy.com> Input: iqs7222 - avoid enabling unused interrupts Xiongfeng Wang <wangxiongfeng2(a)huawei.com> hrtimers: Unconditionally update target CPU base after offline timer migration Qu Wenruo <wqu(a)suse.com> btrfs: fix corruption reading compressed range when block size is smaller than page size Boris Burkov <boris(a)bur.io> btrfs: use readahead_expand() on compressed extents Santhosh Kumar K <s-k6(a)ti.com> mtd: spinand: winbond: Fix oob_layout for W25N01JW Jeongjun Park <aha310510(a)gmail.com> mm/hugetlb: add missing hugetlb_lock in __unmap_hugepage_range() Quanmin Yan <yanquanmin1(a)huawei.com> mm/damon/reclaim: avoid divide-by-zero in damon_reclaim_apply_parameters() Stanislav Fort <stanislav.fort(a)aisle.com> mm/damon/sysfs: fix use-after-free in state_show() Alex Markuze <amarkuze(a)redhat.com> ceph: fix race condition where r_parent becomes stale before sending message Alex Markuze <amarkuze(a)redhat.com> ceph: fix race condition validating r_parent before applying state Ilya Dryomov <idryomov(a)gmail.com> libceph: fix invalid accesses to ceph_connection_v1_info Chen Ridong <chenridong(a)huawei.com> kernfs: Fix UAF in polling when open file is released Matthieu Baerts (NGI0) <matttbe(a)kernel.org> netlink: specs: mptcp: fix if-idx attribute type Jakub Kicinski <kuba(a)kernel.org> netlink: specs: mptcp: replace underscores with dashes in names Matthieu Baerts (NGI0) <matttbe(a)kernel.org> netlink: specs: mptcp: clearly mention attributes Matthieu Baerts (NGI0) <matttbe(a)kernel.org> netlink: specs: mptcp: add missing 'server-side' attr David Rosca <david.rosca(a)amd.com> drm/amdgpu/vcn4: Fix IB parsing with multiple engine info packages David Rosca <david.rosca(a)amd.com> drm/amdgpu/vcn: Allow limiting ctx to instance 0 for AV1 at any time Thomas Hellström <thomas.hellstrom(a)linux.intel.com> drm/xe: Attempt to bring bos back to VRAM after eviction Johan Hovold <johan(a)kernel.org> drm/mediatek: fix potential OF node use-after-free Quanmin Yan <yanquanmin1(a)huawei.com> mm/damon/lru_sort: avoid divide-by-zero in damon_lru_sort_apply_parameters() Sang-Heon Jeon <ekffu200098(a)gmail.com> mm/damon/core: set quota->charged_from to jiffies at first charge window Kyle Meyer <kyle.meyer(a)hpe.com> mm/memory-failure: fix redundant updates for already poisoned pages Miaohe Lin <linmiaohe(a)huawei.com> mm/memory-failure: fix VM_BUG_ON_PAGE(PagePoisoned(page)) when unpoison memory Wei Yang <richard.weiyang(a)gmail.com> mm/khugepaged: fix the address passed to notifier on testing young Miklos Szeredi <mszeredi(a)redhat.com> fuse: prevent overflow in copy_file_range return value Miklos Szeredi <mszeredi(a)redhat.com> fuse: check if copy_file_range() returns larger than requested size Amir Goldstein <amir73il(a)gmail.com> fuse: do not allow mapping a non-regular backing file Christophe Kerello <christophe.kerello(a)foss.st.com> mtd: rawnand: stm32_fmc2: fix ECC overwrite Christophe Kerello <christophe.kerello(a)foss.st.com> mtd: rawnand: stm32_fmc2: avoid overlapping mappings on ECC buffer Alexander Sverdlin <alexander.sverdlin(a)siemens.com> mtd: nand: raw: atmel: Respect tAR, tCLR in read setup timing Oleksij Rempel <o.rempel(a)pengutronix.de> net: usb: asix: ax88772: drop phylink use in PM to avoid MDIO runtime PM wakeups Chiasheng Lee <chiasheng.lee(a)linux.intel.com> i2c: i801: Hide Intel Birch Stream SoC TCO WDT Omar Sandoval <osandov(a)fb.com> btrfs: fix subvolume deletion lockup caused by inodes xarray race Boris Burkov <boris(a)bur.io> btrfs: fix squota compressed stats leak Mark Tinguely <mark.tinguely(a)oracle.com> ocfs2: fix recursive semaphore deadlock in fiemap call Krister Johansen <kjlx(a)templeofstupid.com> mptcp: sockopt: make sync_socket_options propagate SOCK_KEEPOPEN Nathan Chancellor <nathan(a)kernel.org> compiler-clang.h: define __SANITIZE_*__ macros only when undefined Trond Myklebust <trond.myklebust(a)hammerspace.com> Revert "SUNRPC: Don't allow waiting for exiting tasks" Salah Triki <salah.triki(a)gmail.com> EDAC/altera: Delete an inappropriate dma_free_coherent() call wangzijie <wangzijie1(a)honor.com> proc: fix type confusion in pde_set_flags() Kuniyuki Iwashima <kuniyu(a)google.com> tcp_bpf: Call sk_msg_free() when tcp_bpf_send_verdict() fails to allocate psock->cork. Peilin Ye <yepeilin(a)google.com> bpf: Tell memcg to use allow_spinning=false path in bpf_timer_init() KaFai Wan <kafai.wan(a)linux.dev> bpf: Allow fall back to interpreter for programs with stack size <= 512 Daniel Borkmann <daniel(a)iogearbox.net> bpf: Fix out-of-bounds dynptr write in bpf_crypto_crypt Thomas Richter <tmricht(a)linux.ibm.com> s390/cpum_cf: Deny all sampling events by counter PMU Thomas Richter <tmricht(a)linux.ibm.com> s390/pai: Deny all events not handled by this PMU Pu Lehui <pulehui(a)huawei.com> tracing: Silence warning when chunk allocation fails in trace_pid_write Jonathan Curley <jcurley(a)purestorage.com> NFSv4/flexfiles: Fix layout merge mirror check. Trond Myklebust <trond.myklebust(a)hammerspace.com> NFS: nfs_invalidate_folio() must observe the offset and size arguments Trond Myklebust <trond.myklebust(a)hammerspace.com> NFSv4.2: Serialise O_DIRECT i/o and copy range Trond Myklebust <trond.myklebust(a)hammerspace.com> NFSv4.2: Serialise O_DIRECT i/o and clone range Trond Myklebust <trond.myklebust(a)hammerspace.com> NFSv4.2: Serialise O_DIRECT i/o and fallocate() Trond Myklebust <trond.myklebust(a)hammerspace.com> NFS: Serialise O_DIRECT i/o and truncate() Max Kellermann <max.kellermann(a)ionos.com> fs/nfs/io: make nfs_start_io_*() killable Vladimir Riabchun <ferr.lambarginio(a)gmail.com> ftrace/samples: Fix function size computation Scott Mayhew <smayhew(a)redhat.com> nfs/localio: restore creds before releasing pageio data Mike Snitzer <snitzer(a)kernel.org> nfs/localio: add direct IO enablement with sync and async IO support Mike Snitzer <snitzer(a)kernel.org> nfs/localio: remove extra indirect nfs_to call to check {read,write}_iter Luo Gengkun <luogengkun(a)huaweicloud.com> tracing: Fix tracing_marker may trigger page fault during preempt_disable Trond Myklebust <trond.myklebust(a)hammerspace.com> NFSv4: Clear the NFS_CAP_XATTR flag if not supported by the server Trond Myklebust <trond.myklebust(a)hammerspace.com> NFSv4: Clear NFS_CAP_OPEN_XOR and NFS_CAP_DELEGTIME if not supported Trond Myklebust <trond.myklebust(a)hammerspace.com> NFSv4: Clear the NFS_CAP_FS_LOCATIONS flag if it is not set Guenter Roeck <linux(a)roeck-us.net> trace/fgraph: Fix error handling Trond Myklebust <trond.myklebust(a)hammerspace.com> NFSv4: Don't clear capabilities that won't be reset Justin Worrell <jworrell(a)gmail.com> SUNRPC: call xs_sock_process_cmsg for all cmsg Tigran Mkrtchyan <tigran.mkrtchyan(a)desy.de> flexfiles/pNFS: fix NULL checks on result of ff_layout_choose_ds_for_read David Rosca <david.rosca(a)amd.com> drm/amdgpu: Add back JPEG to video caps for carrizo and newer Takashi Iwai <tiwai(a)suse.de> ALSA: hda/realtek: Fix built-in mic assignment on ASUS VivoBook X515UA Aurabindo Pillai <aurabindo.pillai(a)amd.com> Revert "drm/amd/display: Optimize cursor position updates" Srinivasan Shanmugam <srinivasan.shanmugam(a)amd.com> drm/amd/display: Fix error pointers in amdgpu_dm_crtc_mem_type_changed Umesh Nerlige Ramappa <umesh.nerlige.ramappa(a)intel.com> drm/i915/pmu: Fix zero delta busyness issue Theodore Ts'o <tytso(a)mit.edu> ext4: introduce linear search for dentries Huan Yang <link(a)vivo.com> Revert "udmabuf: fix vmap_udmabuf error page set" Maurizio Lombardi <mlombard(a)redhat.com> nvme-pci: skip nvme_write_sq_db on empty rqlist Fedor Pchelkin <pchelkin(a)ispras.ru> dma-debug: fix physical address calculation for struct dma_debug_entry Sean Anderson <sean.anderson(a)linux.dev> dma-mapping: fix swapped dir/flags arguments to trace_dma_alloc_sgt_err Harry Yoo <harry.yoo(a)oracle.com> mm: introduce and use {pgd,p4d}_populate_kernel() Yevgeny Kliteynik <kliteyn(a)nvidia.com> net/mlx5: HWS, change error flow on matcher disconnect Yeoreum Yun <yeoreum.yun(a)arm.com> kunit: kasan_test: disable fortify string checker on kasan_strings() test Baochen Qiang <baochen.qiang(a)oss.qualcomm.com> dma-debug: don't enforce dma mapping check on noncoherent allocations Sean Anderson <sean.anderson(a)linux.dev> dma-mapping: trace more error paths Sean Anderson <sean.anderson(a)linux.dev> dma-mapping: use trace_dma_alloc for dma_alloc* instead of using trace_dma_map Sean Anderson <sean.anderson(a)linux.dev> dma-mapping: trace dma_alloc/free direction Christoph Hellwig <hch(a)lst.de> dma-debug: store a phys_addr_t in struct dma_debug_entry Amir Goldstein <amir73il(a)gmail.com> fhandle: use more consistent rules for decoding file handle from userns ------------- Diffstat: .../bindings/serial/brcm,bcm7271-uart.yaml | 2 +- Documentation/filesystems/nfs/localio.rst | 13 ++ Documentation/netlink/specs/mptcp_pm.yaml | 52 ++--- Documentation/networking/can.rst | 2 +- Makefile | 4 +- arch/riscv/include/asm/compat.h | 1 - arch/s390/kernel/perf_cpum_cf.c | 4 +- arch/s390/kernel/perf_pai_crypto.c | 4 +- arch/s390/kernel/perf_pai_ext.c | 2 +- arch/x86/kernel/cpu/topology_amd.c | 25 +-- drivers/dma-buf/Kconfig | 1 - drivers/dma-buf/udmabuf.c | 22 +-- drivers/dma/dw/rzn1-dmamux.c | 15 +- drivers/dma/idxd/init.c | 39 ++-- drivers/dma/qcom/bam_dma.c | 8 +- drivers/dma/ti/edma.c | 4 +- drivers/edac/altera_edac.c | 1 - drivers/gpu/drm/amd/amdgpu/amdgpu_ring.c | 3 - drivers/gpu/drm/amd/amdgpu/vcn_v3_0.c | 12 +- drivers/gpu/drm/amd/amdgpu/vcn_v4_0.c | 60 +++--- drivers/gpu/drm/amd/amdgpu/vi.c | 7 + drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 5 + .../gpu/drm/amd/display/dc/dpp/dcn10/dcn10_dpp.c | 7 +- .../drm/amd/display/dc/dpp/dcn401/dcn401_dpp_cm.c | 6 +- .../gpu/drm/amd/display/dc/hubp/dcn20/dcn20_hubp.c | 8 +- .../drm/amd/display/dc/hubp/dcn401/dcn401_hubp.c | 10 +- .../drm/amd/display/dc/hwss/dcn20/dcn20_hwseq.c | 2 +- drivers/gpu/drm/i915/display/intel_display_power.c | 6 +- drivers/gpu/drm/i915/gt/uc/intel_guc_submission.c | 16 ++ drivers/gpu/drm/mediatek/mtk_drm_drv.c | 11 +- drivers/gpu/drm/panthor/panthor_drv.c | 2 +- drivers/gpu/drm/xe/tests/xe_bo.c | 2 +- drivers/gpu/drm/xe/tests/xe_dma_buf.c | 10 +- drivers/gpu/drm/xe/xe_bo.c | 16 +- drivers/gpu/drm/xe/xe_bo.h | 2 +- drivers/gpu/drm/xe/xe_dma_buf.c | 2 +- drivers/i2c/busses/i2c-i801.c | 2 +- drivers/input/misc/iqs7222.c | 3 + drivers/input/serio/i8042-acpipnpio.h | 14 ++ drivers/mtd/nand/raw/atmel/nand-controller.c | 16 +- drivers/mtd/nand/raw/stm32_fmc2_nand.c | 46 ++--- drivers/mtd/nand/spi/winbond.c | 37 +++- drivers/net/can/xilinx_can.c | 16 +- drivers/net/ethernet/freescale/fec_main.c | 3 +- drivers/net/ethernet/intel/i40e/i40e_main.c | 2 +- drivers/net/ethernet/intel/igb/igb_ethtool.c | 5 +- .../mlx5/core/steering/hws/mlx5hws_matcher.c | 24 +-- drivers/net/phy/mdio_bus.c | 4 +- drivers/nvme/host/pci.c | 3 + drivers/phy/qualcomm/phy-qcom-eusb2-repeater.c | 4 +- drivers/phy/tegra/xusb-tegra210.c | 6 +- drivers/phy/ti/phy-omap-usb2.c | 13 ++ drivers/phy/ti/phy-ti-pipe3.c | 13 ++ drivers/regulator/sy7636a-regulator.c | 7 +- drivers/tty/hvc/hvc_console.c | 6 +- drivers/tty/serial/sc16is7xx.c | 14 +- drivers/usb/gadget/function/f_midi2.c | 11 +- drivers/usb/gadget/udc/dummy_hcd.c | 8 +- drivers/usb/host/xhci-mem.c | 2 +- drivers/usb/serial/option.c | 17 ++ drivers/usb/typec/tcpm/tcpm.c | 12 +- fs/btrfs/extent_io.c | 72 ++++++- fs/btrfs/inode.c | 12 +- fs/btrfs/qgroup.c | 6 +- fs/ceph/debugfs.c | 14 +- fs/ceph/dir.c | 17 +- fs/ceph/file.c | 24 +-- fs/ceph/inode.c | 88 +++++++-- fs/ceph/mds_client.c | 172 ++++++++++------- fs/ceph/mds_client.h | 18 +- fs/ext4/namei.c | 14 +- fs/fhandle.c | 8 + fs/fuse/file.c | 5 +- fs/fuse/passthrough.c | 5 + fs/kernfs/file.c | 58 ++++-- fs/nfs/client.c | 2 + fs/nfs/direct.c | 22 ++- fs/nfs/file.c | 21 +- fs/nfs/flexfilelayout/flexfilelayout.c | 21 +- fs/nfs/inode.c | 4 +- fs/nfs/internal.h | 17 +- fs/nfs/io.c | 55 ++++-- fs/nfs/localio.c | 125 +++++++++--- fs/nfs/nfs42proc.c | 2 + fs/nfs/nfs4file.c | 2 + fs/nfs/nfs4proc.c | 7 +- fs/nfs/write.c | 1 + fs/ocfs2/extent_map.c | 10 +- fs/proc/generic.c | 3 +- include/linux/compiler-clang.h | 31 ++- include/linux/fs.h | 10 +- include/linux/nfs_xdr.h | 1 + include/linux/pgalloc.h | 29 +++ include/linux/pgtable.h | 13 +- include/net/netfilter/nf_tables.h | 11 +- include/net/netfilter/nf_tables_core.h | 49 ++--- include/net/netns/nftables.h | 1 + include/trace/events/dma.h | 153 ++++++++++++++- include/uapi/linux/mptcp_pm.h | 50 ++--- kernel/bpf/core.c | 16 +- kernel/bpf/crypto.c | 2 +- kernel/bpf/helpers.c | 7 +- kernel/dma/debug.c | 135 ++++++++----- kernel/dma/debug.h | 20 ++ kernel/dma/mapping.c | 41 ++-- kernel/time/hrtimer.c | 11 +- kernel/trace/fgraph.c | 3 +- kernel/trace/trace.c | 10 +- mm/Kconfig | 2 +- mm/damon/core.c | 4 + mm/damon/lru_sort.c | 5 + mm/damon/reclaim.c | 5 + mm/damon/sysfs.c | 14 +- mm/hugetlb.c | 9 +- mm/kasan/init.c | 12 +- mm/kasan/kasan_test_c.c | 1 + mm/khugepaged.c | 4 +- mm/memory-failure.c | 20 +- mm/percpu.c | 6 +- mm/sparse-vmemmap.c | 6 +- net/bridge/br.c | 7 + net/can/j1939/bus.c | 5 +- net/can/j1939/socket.c | 3 + net/ceph/messenger.c | 7 +- net/hsr/hsr_device.c | 97 +++++++++- net/hsr/hsr_main.c | 4 +- net/hsr/hsr_main.h | 3 + net/ipv4/ip_tunnel_core.c | 6 + net/ipv4/tcp_bpf.c | 5 +- net/mptcp/sockopt.c | 11 +- net/netfilter/nf_tables_api.c | 123 +++++++----- net/netfilter/nft_dynset.c | 5 +- net/netfilter/nft_lookup.c | 67 +++++-- net/netfilter/nft_objref.c | 5 +- net/netfilter/nft_set_bitmap.c | 11 +- net/netfilter/nft_set_hash.c | 54 +++--- net/netfilter/nft_set_pipapo.c | 211 ++++++++------------- net/netfilter/nft_set_pipapo_avx2.c | 29 +-- net/netfilter/nft_set_rbtree.c | 46 +++-- net/netlink/genetlink.c | 3 + net/sunrpc/sched.c | 2 - net/sunrpc/xprtsock.c | 6 +- samples/ftrace/ftrace-direct-modify.c | 2 +- sound/pci/hda/patch_realtek.c | 1 + 144 files changed, 1887 insertions(+), 986 deletions(-)

2 months

16
157
0 0

[PATCH v2] crypto: zero initialize memory allocated via sock_kmalloc

by Shivani Agarwal

Several crypto user API contexts and requests allocated with sock_kmalloc() were left uninitialized, relying on callers to set fields explicitly. This resulted in the use of uninitialized data in certain error paths or when new fields are added in the future. The ACVP patches also contain two user-space interface files: algif_kpp.c and algif_akcipher.c. These too rely on proper initialization of their context structures. A particular issue has been observed with the newly added 'inflight' variable introduced in af_alg_ctx by commit: 67b164a871af ("crypto: af_alg - Disallow multiple in-flight AIO requests") Because the context is not memset to zero after allocation, the inflight variable has contained garbage values. As a result, af_alg_alloc_areq() has incorrectly returned -EBUSY randomly when the garbage value was interpreted as true: https://github.com/gregkh/linux/blame/master/crypto/af_alg.c#L1209 The check directly tests ctx->inflight without explicitly comparing against true/false. Since inflight is only ever set to true or false later, an uninitialized value has triggered -EBUSY failures. Zero-initializing memory allocated with sock_kmalloc() ensures inflight and other fields start in a known state, removing random issues caused by uninitialized data. Fixes: fe869cdb89c9 ("crypto: algif_hash - User-space interface for hash operations") Fixes: 5afdfd22e6ba ("crypto: algif_rng - add random number generator support") Fixes: 2d97591ef43d ("crypto: af_alg - consolidation of duplicate code") Fixes: 67b164a871af ("crypto: af_alg - Disallow multiple in-flight AIO requests") Cc: stable(a)vger.kernel.org Signed-off-by: Shivani Agarwal <shivani.agarwal(a)broadcom.com> --- Changes in v2: - Dropped algif_skcipher_export changes, The ctx->state will immediately be overwritten by crypto_skcipher_export. - No other changes. --- crypto/af_alg.c | 5 ++--- crypto/algif_hash.c | 3 +-- crypto/algif_rng.c | 3 +-- 3 files changed, 4 insertions(+), 7 deletions(-) diff --git a/crypto/af_alg.c b/crypto/af_alg.c index ca6fdcc6c54a..6c271e55f44d 100644 --- a/crypto/af_alg.c +++ b/crypto/af_alg.c @@ -1212,15 +1212,14 @@ struct af_alg_async_req *af_alg_alloc_areq(struct sock *sk, if (unlikely(!areq)) return ERR_PTR(-ENOMEM); + memset(areq, 0, areqlen); + ctx->inflight = true; areq->areqlen = areqlen; areq->sk = sk; areq->first_rsgl.sgl.sgt.sgl = areq->first_rsgl.sgl.sgl; - areq->last_rsgl = NULL; INIT_LIST_HEAD(&areq->rsgl_list); - areq->tsgl = NULL; - areq->tsgl_entries = 0; return areq; } diff --git a/crypto/algif_hash.c b/crypto/algif_hash.c index e3f1a4852737..4d3dfc60a16a 100644 --- a/crypto/algif_hash.c +++ b/crypto/algif_hash.c @@ -416,9 +416,8 @@ static int hash_accept_parent_nokey(void *private, struct sock *sk) if (!ctx) return -ENOMEM; - ctx->result = NULL; + memset(ctx, 0, len); ctx->len = len; - ctx->more = false; crypto_init_wait(&ctx->wait); ask->private = ctx; diff --git a/crypto/algif_rng.c b/crypto/algif_rng.c index 10c41adac3b1..1a86e40c8372 100644 --- a/crypto/algif_rng.c +++ b/crypto/algif_rng.c @@ -248,9 +248,8 @@ static int rng_accept_parent(void *private, struct sock *sk) if (!ctx) return -ENOMEM; + memset(ctx, 0, len); ctx->len = len; - ctx->addtl = NULL; - ctx->addtl_len = 0; /* * No seeding done at that point -- if multiple accepts are -- 2.40.4

2 months

2
1
0 0

[PATCH v3] crypto: caam: Add check for kcalloc() in test_len()

by Guangshuo Li

As kcalloc() may fail, check its return value to avoid a NULL pointer dereference when passing the buffer to rng->read(). On allocation failure, log the error and return since test_len() returns void. Fixes: 2be0d806e25e ("crypto: caam - add a test for the RNG") Cc: stable(a)vger.kernel.org Signed-off-by: Guangshuo Li <lgs201920130244(a)gmail.com> --- changelog: v3: - Fix build error: test_len() returns void; return without a value. - No functional changes beyond the allocation failure path. v2: - Return on allocation failure to avoid possible NULL dereference. --- drivers/crypto/caam/caamrng.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/drivers/crypto/caam/caamrng.c b/drivers/crypto/caam/caamrng.c index b3d14a7f4dd1..0eb43c862516 100644 --- a/drivers/crypto/caam/caamrng.c +++ b/drivers/crypto/caam/caamrng.c @@ -181,7 +181,9 @@ static inline void test_len(struct hwrng *rng, size_t len, bool wait) struct device *dev = ctx->ctrldev; buf = kcalloc(CAAM_RNG_MAX_FIFO_STORE_SIZE, sizeof(u8), GFP_KERNEL); - + if (!buf) { + return; + } while (len > 0) { read_len = rng->read(rng, buf, len, wait); -- 2.43.0

2 months

2
1
0 0

[PATCH 6.1 0/6] fix invalid sleeping in detect_cache_attributes()

by Wen Yang

commit 3fcbf1c77d08 ("arch_topology: Fix cache attributes detection in the CPU hotplug path") adds a call to detect_cache_attributes() to populate the cacheinfo before updating the siblings mask. detect_cache_attributes() allocates memory and can take the PPTT mutex (on ACPI platforms). On PREEMPT_RT kernels, on secondary CPUs, this triggers a: 'BUG: sleeping function called from invalid context' as the code is executed with preemption and interrupts disabled: | BUG: sleeping function called from invalid context at kernel/locking/spinlock_rt.c:46 | in_atomic(): 1, irqs_disabled(): 128, non_block: 0, pid: 0, name: swapper/111 | preempt_count: 1, expected: 0 | RCU nest depth: 1, expected: 1 | 3 locks held by swapper/111/0: | #0: (&pcp->lock){+.+.}-{3:3}, at: get_page_from_freelist+0x218/0x12c8 | #1: (rcu_read_lock){....}-{1:3}, at: rt_spin_trylock+0x48/0xf0 | #2: (&zone->lock){+.+.}-{3:3}, at: rmqueue_bulk+0x64/0xa80 | irq event stamp: 0 | hardirqs last enabled at (0): 0x0 | hardirqs last disabled at (0): copy_process+0x5dc/0x1ab8 | softirqs last enabled at (0): copy_process+0x5dc/0x1ab8 | softirqs last disabled at (0): 0x0 | Preemption disabled at: | migrate_enable+0x30/0x130 | CPU: 111 PID: 0 Comm: swapper/111 Tainted: G W 6.0.0-rc4-rt6-[...] | Call trace: | __kmalloc+0xbc/0x1e8 | detect_cache_attributes+0x2d4/0x5f0 | update_siblings_masks+0x30/0x368 | store_cpu_topology+0x78/0xb8 | secondary_start_kernel+0xd0/0x198 | __secondary_switched+0xb0/0xb4 Pierre fixed this issue in the upstream 6.3 and the original series is follows: https://lore.kernel.org/all/167404285593.885445.6219705651301997538.b4-ty@a… We also encountered the same issue on 6.1 stable branch, and need to backport this series. Pierre Gondois (6): cacheinfo: Use RISC-V's init_cache_level() as generic OF implementation cacheinfo: Return error code in init_of_cache_level() cacheinfo: Check 'cache-unified' property to count cache leaves ACPI: PPTT: Remove acpi_find_cache_levels() ACPI: PPTT: Update acpi_find_last_cache_level() to acpi_get_cache_info() arch_topology: Build cacheinfo from primary CPU arch/arm64/kernel/cacheinfo.c | 11 ++- arch/riscv/kernel/cacheinfo.c | 42 ----------- drivers/acpi/pptt.c | 93 +++++++++++++---------- drivers/base/arch_topology.c | 12 ++- drivers/base/cacheinfo.c | 134 +++++++++++++++++++++++++++++----- include/linux/cacheinfo.h | 11 ++- 6 files changed, 196 insertions(+), 107 deletions(-) -- 2.25.1

2 months

2
9
0 0

[PATCH v3] platform/x86: alienware-wmi-wmax: Add AWCC support to Dell G15 5530

by tr1x_em

Makes alienware-wmi load on G15 5530 by default Cc: stable(a)vger.kernel.org Signed-off-by: Saumya <admin(a)trix.is-a.dev> --- drivers/platform/x86/dell/alienware-wmi-wmax.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/drivers/platform/x86/dell/alienware-wmi-wmax.c b/drivers/platform/x86/dell/alienware-wmi-wmax.c index 31f9643a6..3b25a8283 100644 --- a/drivers/platform/x86/dell/alienware-wmi-wmax.c +++ b/drivers/platform/x86/dell/alienware-wmi-wmax.c @@ -209,6 +209,14 @@ static const struct dmi_system_id awcc_dmi_table[] __initconst = { }, .driver_data = &g_series_quirks, }, + { + .ident = "Dell Inc. G15 5530", + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), + DMI_MATCH(DMI_PRODUCT_NAME, "Dell G15 5530"), + }, + .driver_data = &g_series_quirks, + }, { .ident = "Dell Inc. G16 7630", .matches = { -- 2.51.0

2 months

3
2
0 0

[PATCH] perf tools: Fix bool return value in gzip_is_compressed()

by Miaoqian Lin

gzip_is_compressed() returns -1 on error but is declared as bool. And -1 gets converted to true, which could be misleading. Return false instead to match the declared type. Fixes: 88c74dc76a30 ("perf tools: Add gzip_is_compressed function") Cc: <stable(a)vger.kernel.org> Signed-off-by: Miaoqian Lin <linmq006(a)gmail.com> --- tools/perf/util/zlib.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/tools/perf/util/zlib.c b/tools/perf/util/zlib.c index 78d2297c1b67..1f7c06523059 100644 --- a/tools/perf/util/zlib.c +++ b/tools/perf/util/zlib.c @@ -88,7 +88,7 @@ bool gzip_is_compressed(const char *input) ssize_t rc; if (fd < 0) - return -1; + return false; rc = read(fd, buf, sizeof(buf)); close(fd); -- 2.39.5 (Apple Git-154)

2 months

4
5
0 0

[PATCH v4 0/2] media: pci: Fix invalid access to file *

by Jacopo Mondi

Since commits 7b9eb53e8591 ("media: cx18: Access v4l2_fh from file") 9ba9d11544f9 ("media: ivtv: Access v4l2_fh from file") All the ioctl handlers access their private data structures from file * The ivtv and cx18 drivers call the ioctl handlers from their DVB layer without a valid file *, causing invalid memory access. The issue has been reported by smatch in "[bug report] media: cx18: Access v4l2_fh from file" Fix this by providing wrappers for the ioctl handlers to be used by the DVB layer that do not require a valid file *. Signed-off-by: Jacopo Mondi <jacopo.mondi(a)ideasonboard.com> --- Changes in v4: - Slightly adjust commit messages - Link to v3: https://lore.kernel.org/r/20250818-cx18-v4l2-fh-v3-0-5e2f08f3cadc@ideasonbo… Changes in v3: - Change helpers to accept the type they're going to operate on instead of using the open_id wrapper type as suggested by Laurent - Link to v2: https://lore.kernel.org/r/20250818-cx18-v4l2-fh-v2-0-3f53ce423663@ideasonbo… Changes in v2: - Add Cc: stable(a)vger.kernel.org per-patch --- Jacopo Mondi (2): media: cx18: Fix invalid access to file * media: ivtv: Fix invalid access to file * drivers/media/pci/cx18/cx18-driver.c | 9 +++------ drivers/media/pci/cx18/cx18-ioctl.c | 30 +++++++++++++++++++----------- drivers/media/pci/cx18/cx18-ioctl.h | 8 +++++--- drivers/media/pci/ivtv/ivtv-driver.c | 11 ++++------- drivers/media/pci/ivtv/ivtv-ioctl.c | 22 +++++++++++++++++----- drivers/media/pci/ivtv/ivtv-ioctl.h | 6 ++++-- 6 files changed, 52 insertions(+), 34 deletions(-) --- base-commit: a75b8d198c55e9eb5feb6f6e155496305caba2dc change-id: 20250818-cx18-v4l2-fh-7eaa6199fdde Best regards, -- Jacopo Mondi <jacopo.mondi(a)ideasonboard.com>

2 months

2
7
0 0

[PATCH v5 1/1] mm/rmap: fix soft-dirty and uffd-wp bit loss when remapping zero-filled mTHP subpage to shared zeropage

by Lance Yang

From: Lance Yang <lance.yang(a)linux.dev> When splitting an mTHP and replacing a zero-filled subpage with the shared zeropage, try_to_map_unused_to_zeropage() currently drops several important PTE bits. For userspace tools like CRIU, which rely on the soft-dirty mechanism for incremental snapshots, losing the soft-dirty bit means modified pages are missed, leading to inconsistent memory state after restore. As pointed out by David, the more critical uffd-wp bit is also dropped. This breaks the userfaultfd write-protection mechanism, causing writes to be silently missed by monitoring applications, which can lead to data corruption. Preserve both the soft-dirty and uffd-wp bits from the old PTE when creating the new zeropage mapping to ensure they are correctly tracked. Cc: <stable(a)vger.kernel.org> Fixes: b1f202060afe ("mm: remap unused subpages to shared zeropage when splitting isolated thp") Suggested-by: David Hildenbrand <david(a)redhat.com> Suggested-by: Dev Jain <dev.jain(a)arm.com> Acked-by: David Hildenbrand <david(a)redhat.com> Reviewed-by: Dev Jain <dev.jain(a)arm.com> Signed-off-by: Lance Yang <lance.yang(a)linux.dev> --- v4 -> v5: - Move ptep_get() call after the !pvmw.pte check, which handles PMD-mapped THP migration entries. - https://lore.kernel.org/linux-mm/20250930071053.36158-1-lance.yang@linux.de… v3 -> v4: - Minor formatting tweak in try_to_map_unused_to_zeropage() function signature (per David and Dev) - Collect Reviewed-by from Dev - thanks! - https://lore.kernel.org/linux-mm/20250930060557.85133-1-lance.yang@linux.de… v2 -> v3: - ptep_get() gets called only once per iteration (per Dev) - https://lore.kernel.org/linux-mm/20250930043351.34927-1-lance.yang@linux.de… v1 -> v2: - Avoid calling ptep_get() multiple times (per Dev) - Double-check the uffd-wp bit (per David) - Collect Acked-by from David - thanks! - https://lore.kernel.org/linux-mm/20250928044855.76359-1-lance.yang@linux.de… mm/migrate.c | 15 ++++++++++----- 1 file changed, 10 insertions(+), 5 deletions(-) diff --git a/mm/migrate.c b/mm/migrate.c index ce83c2c3c287..e3065c9edb55 100644 --- a/mm/migrate.c +++ b/mm/migrate.c @@ -296,8 +296,7 @@ bool isolate_folio_to_list(struct folio *folio, struct list_head *list) } static bool try_to_map_unused_to_zeropage(struct page_vma_mapped_walk *pvmw, - struct folio *folio, - unsigned long idx) + struct folio *folio, pte_t old_pte, unsigned long idx) { struct page *page = folio_page(folio, idx); pte_t newpte; @@ -306,7 +305,7 @@ static bool try_to_map_unused_to_zeropage(struct page_vma_mapped_walk *pvmw, return false; VM_BUG_ON_PAGE(!PageAnon(page), page); VM_BUG_ON_PAGE(!PageLocked(page), page); - VM_BUG_ON_PAGE(pte_present(ptep_get(pvmw->pte)), page); + VM_BUG_ON_PAGE(pte_present(old_pte), page); if (folio_test_mlocked(folio) || (pvmw->vma->vm_flags & VM_LOCKED) || mm_forbids_zeropage(pvmw->vma->vm_mm)) @@ -322,6 +321,12 @@ static bool try_to_map_unused_to_zeropage(struct page_vma_mapped_walk *pvmw, newpte = pte_mkspecial(pfn_pte(my_zero_pfn(pvmw->address), pvmw->vma->vm_page_prot)); + + if (pte_swp_soft_dirty(old_pte)) + newpte = pte_mksoft_dirty(newpte); + if (pte_swp_uffd_wp(old_pte)) + newpte = pte_mkuffd_wp(newpte); + set_pte_at(pvmw->vma->vm_mm, pvmw->address, pvmw->pte, newpte); dec_mm_counter(pvmw->vma->vm_mm, mm_counter(folio)); @@ -364,13 +369,13 @@ static bool remove_migration_pte(struct folio *folio, continue; } #endif + old_pte = ptep_get(pvmw.pte); if (rmap_walk_arg->map_unused_to_zeropage && - try_to_map_unused_to_zeropage(&pvmw, folio, idx)) + try_to_map_unused_to_zeropage(&pvmw, folio, old_pte, idx)) continue; folio_get(folio); pte = mk_pte(new, READ_ONCE(vma->vm_page_prot)); - old_pte = ptep_get(pvmw.pte); entry = pte_to_swp_entry(old_pte); if (!is_migration_entry_young(entry)) -- 2.49.0

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[PATCH v2 0/2] media: az6007: overall refactor to fix bugs

by Jeongjun Park

This patch series refactors the az6007 driver to address root causes of persistent bugs that have persisted for some time. Jeongjun Park (2): media: az6007: fix out-of-bounds in az6007_i2c_xfer() media: az6007: refactor to properly use dvb-usb-v2 drivers/media/usb/dvb-usb-v2/az6007.c | 211 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++-------------------------------------------------------------------------------------------------------- 1 file changed, 107 insertions(+), 104 deletions(-)

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Linux-stable-mirror September 2025