From: Helge Deller deller@gmx.de
commit 6e866a462867b60841202e900f10936a0478608c upstream.
Fix a kernel crash which happens on PA1.x CPUs while initializing the FTRACE/KPROBE breakpoints. The PTE table entries for the fixmap area were not created correctly.
Signed-off-by: Helge Deller deller@gmx.de Fixes: ccfbc68d41c2 ("parisc: add set_fixmap()/clear_fixmap()") Cc: stable@vger.kernel.org # v5.2+ Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
--- arch/parisc/mm/fixmap.c | 5 +---- 1 file changed, 1 insertion(+), 4 deletions(-)
--- a/arch/parisc/mm/fixmap.c +++ b/arch/parisc/mm/fixmap.c @@ -18,12 +18,9 @@ void notrace set_fixmap(enum fixed_addre pte_t *pte;
if (pmd_none(*pmd)) - pmd = pmd_alloc(NULL, pgd, vaddr); - - pte = pte_offset_kernel(pmd, vaddr); - if (pte_none(*pte)) pte = pte_alloc_kernel(pmd, vaddr);
+ pte = pte_offset_kernel(pmd, vaddr); set_pte_at(&init_mm, vaddr, pte, __mk_pte(phys, PAGE_KERNEL_RWX)); flush_tlb_kernel_range(vaddr, vaddr + PAGE_SIZE); }