github-mirror/linux
1
0
Fork 0
mirror of https://github.com/torvalds/linux.git synced 2026-05-26 08:02:27 +02:00
Code Issues Actions Packages Projects Releases Wiki Activity Graph

arm64: mm: avoid writable executable mappings in kexec/hibernate code

Browse Source 
The temporary mappings of the low-level kexec and hibernate helpers are
created with both writable and executable attributes, which is not
necessary here, and generally best avoided. So use read-only, executable
attributes instead.

Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
Acked-by: Mark Rutland <mark.rutland@arm.com>
Link: https://lore.kernel.org/r/20220429131347.3621090-3-ardb@kernel.org
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
This commit is contained in:
Ard Biesheuvel 2022-04-29 15:13:47 +02:00 committed by Catalin Marinas
parent 6ee3cf6a20
commit 01142791b0
1 changed files with 1 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
arch/arm64/mm/trans_pgd.c
View File

@ -238,7 +238,7 @@ int trans_pgd_idmap_page(struct trans_pgd_info *info, phys_addr_t *trans_ttbr0,
int this_level, index, level_lsb, level_msb;
dst_addr &= PAGE_MASK;
prev_level_entry = pte_val(pfn_pte(pfn, PAGE_KERNEL_EXEC));
prev_level_entry = pte_val(pfn_pte(pfn, PAGE_KERNEL_ROX));
for (this_level = 3; this_level >= 0; this_level--) {
levels[this_level] = trans_alloc(info);