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linux/arch/arm64/mm
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Breno Leitao c787a235de arm64/gcs: Fix error handling in arch_set_shadow_stack_status() 
[ Upstream commit 53c998527f ]

alloc_gcs() returns an error-encoded pointer on failure, which comes
from do_mmap(), not NULL.

The current NULL check fails to detect errors, which could lead to using
an invalid GCS address.

Use IS_ERR_VALUE() to properly detect errors, consistent with the
check in gcs_alloc_thread_stack().

Fixes: b57180c75c ("arm64/gcs: Implement shadow stack prctl() interface")
Reviewed-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Breno Leitao <leitao@debian.org>
Signed-off-by: Will Deacon <will@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
History 2026-02-26 14:59:01 -08:00
..
cache.S efi: arm64: enter with MMU and caches enabled 2023-01-24 11:51:08 +00:00
context.c arm64: Ensure bits ASID[15:8] are masked out when the kernel uses 8-bit ASIDs 2024-12-05 11:24:38 +00:00
contpte.c Merge branches 'for-next/livepatch', 'for-next/user-contig-bbml2', 'for-next/misc', 'for-next/acpi', 'for-next/debug-entry', 'for-next/feat_mte_tagged_far', 'for-next/kselftest', 'for-next/mdscr-cleanup' and 'for-next/vmap-stack', remote-tracking branch 'arm64/for-next/perf' into for-next/core 2025-07-24 16:01:22 +01:00
copypage.c arm64: mte: Do not warn if the page is already tagged in copy_highpage() 2025-10-23 17:34:58 +01:00
dma-mapping.c arm64: Properly clean up iommu-dma remnants 2024-05-10 09:04:25 +02:00
extable.c arm64: mm: Handle PAN faults on uaccess CPY* instructions 2025-03-07 18:28:29 +00:00
fault.c mm/huge_memory: Fix initialization of huge zero folio 2025-11-18 08:21:27 -08:00
fixmap.c arm64: Add support for FEAT_HAFT 2024-11-05 13:18:35 +00:00
flush.c mm: introduce memdesc_flags_t 2025-09-13 16:55:07 -07:00
gcs.c arm64/gcs: Fix error handling in arch_set_shadow_stack_status() 2026-02-26 14:59:01 -08:00
hugetlbpage.c arm64/mm: Drop redundant addr increment in set_huge_pte_at() 2025-07-17 11:08:56 +01:00
init.c arm64: map [_text, _stext) virtual address range non-executable+read-only 2025-09-22 11:58:17 +01:00
ioremap.c mm/ioremap: pass pgprot_t to ioremap_prot() instead of unsigned long 2025-03-16 22:06:23 -07:00
kasan_init.c kasan: call kasan_init_generic in kasan_init 2025-09-21 14:21:58 -07:00
Makefile mm: rename GENERIC_PTDUMP and PTDUMP_CORE 2025-03-17 00:05:32 -07:00
mem_encrypt.c arm64: mm: Add top-level dispatcher for internal mem_encrypt API 2024-08-30 16:30:41 +01:00
mmap.c mm: change vm_get_page_prot() to accept vm_flags_t argument 2025-07-09 22:42:13 -07:00
mmu.c arm64/mm: Allow __create_pgd_mapping() to propagate pgtable_alloc() errors 2025-12-18 14:02:58 +01:00
mteswap.c arm64: mm: swap: support THP_SWAP on hardware with MTE 2024-04-25 20:56:07 -07:00
pageattr.c arm64/pageattr: Propagate return value from __change_memory_common 2025-12-18 14:03:27 +01:00
pgd.c asm-generic: pgalloc: provide generic __pgd_{alloc,free} 2025-01-25 20:22:24 -08:00
physaddr.c arm64: mm: Don't use %pK through printk 2025-03-20 15:34:53 +00:00
proc.S arm64: Fix cleared E0POE bit after cpu_suspend()/resume() 2026-01-17 16:35:11 +01:00
ptdump.c arm64: Enable vmalloc-huge with ptdump 2025-09-22 11:53:24 +01:00
ptdump_debugfs.c mm/ptdump: take the memory hotplug lock inside ptdump_walk_pgd() 2025-07-09 22:42:20 -07:00
trans_pgd-asm.S arm64: kexec: configure EL2 vectors for kexec 2021-10-01 13:31:00 +01:00
trans_pgd.c arm64: Fix 5-level paging support in kexec/hibernate trampoline 2025-02-04 12:23:09 +00:00