From 9a5125dcb0452e5ff018fc7eac46223c69ca435f Mon Sep 17 00:00:00 2001 From: Helge Deller Date: Sun, 31 Oct 2021 21:58:12 +0100 Subject: parisc: Fix set_fixmap() on PA1.x CPUs 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 Fixes: ccfbc68d41c2 ("parisc: add set_fixmap()/clear_fixmap()") Cc: stable@vger.kernel.org # v5.2+ Signed-off-by: Greg Kroah-Hartman --- arch/parisc/mm/fixmap.c | 5 +---- 1 file changed, 1 insertion(+), 4 deletions(-) diff --git a/arch/parisc/mm/fixmap.c b/arch/parisc/mm/fixmap.c index 24426a7e1a5e..cc15d737fda6 100644 --- a/arch/parisc/mm/fixmap.c +++ b/arch/parisc/mm/fixmap.c @@ -20,12 +20,9 @@ void notrace set_fixmap(enum fixed_addresses idx, phys_addr_t phys) pte_t *pte; if (pmd_none(*pmd)) - pmd = pmd_alloc(NULL, pud, 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); } -- cgit v1.2.3