Li Qiong f66012909e mm/slub: avoid accessing metadata when pointer is invalid in object_err() ... [ Upstream commit b4efccec8d06ceb10a7d34d7b1c449c569d53770 ] object_err() reports details of an object for further debugging, such as the freelist pointer, redzone, etc. However, if the pointer is invalid, attempting to access object metadata can lead to a crash since it does not point to a valid object. One known path to the crash is when alloc_consistency_checks() determines the pointer to the allocated object is invalid because of a freelist corruption, and calls object_err() to report it. The debug code should report and handle the corruption gracefully and not crash in the process. In case the pointer is NULL or check_valid_pointer() returns false for the pointer, only print the pointer value and skip accessing metadata. Fixes: 81819f0fc8 ("SLUB core") Cc: <stable@vger.kernel.org> Signed-off-by: Li Qiong <liqiong@nfschina.com> Reviewed-by: Harry Yoo <harry.yoo@oracle.com> Reviewed-by: Matthew Wilcox (Oracle) <willy@infradead.org> Signed-off-by: Vlastimil Babka <vbabka@suse.cz> [ struct page + print_page_info() ] Signed-off-by: Sasha Levin <sashal@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2025-09-09 18:45:22 +02:00
..
kasan	kasan: print the original fault addr when access invalid shadow	2023-11-08 17:30:43 +01:00
backing-dev.c	writeback, cgroup: remove extra percpu_ref_exit()	2023-05-30 12:57:56 +01:00
balloon_compaction.c
cleancache.c
cma_debug.c
cma.c	mm/cma: use nth_page() in place of direct struct page manipulation	2023-11-28 16:54:58 +00:00
cma.h
compaction.c	mm, vmscan: prevent infinite loop for costly GFP_NOIO | __GFP_RETRY_MAYFAIL allocations	2024-04-13 12:59:22 +02:00
debug_page_ref.c
debug_vm_pgtable.c	mm/debug_vm_pgtable: remove pte entry from the page table	2022-02-08 18:30:35 +01:00
debug.c
dmapool.c
early_ioremap.c
fadvise.c
failslab.c
filemap.c	mm: drop the assumption that VM_SHARED always implies writable	2025-08-28 16:22:54 +02:00
frame_vector.c	media: vb2: frame_vector.c: replace WARN_ONCE with a comment	2023-10-10 21:53:33 +02:00
frontswap.c
gup_benchmark.c
gup.c	mm/migration: return errno when isolate_huge_page failed	2023-02-15 17:22:21 +01:00
highmem.c
hmm.c	mm/hmm: move pmd_to_hmm_pfn_flags() to the respective #ifdeffery	2025-08-28 16:22:38 +02:00
huge_memory.c	mm/huge_memory: fix dereferencing invalid pmd migration entry	2025-06-27 11:04:24 +01:00
hugetlb_cgroup.c	hugetlb_cgroup: fix imbalanced css_get and css_put pair for shared mappings	2021-03-30 14:31:54 +02:00
hugetlb.c	mm/hugetlb: fix huge_pmd_unshare() vs GUP-fast race	2025-06-27 11:04:21 +01:00
hwpoison-inject.c
init-mm.c
internal.h	mm: unconditionally close VMAs on error	2024-12-14 19:47:40 +01:00
interval_tree.c
ioremap.c
Kconfig
Kconfig.debug
khugepaged.c	mm/khugepaged: fix ->anon_vma race	2025-09-09 18:45:21 +02:00
kmemleak.c	mm/kmemleak: avoid deadlock by moving pr_warn() outside kmemleak_lock	2025-08-28 16:22:48 +02:00
ksm.c	ksm: fix potential missing rmap_item for stable_node	2021-05-19 10:13:07 +02:00
list_lru.c
maccess.c	maccess: Fix writing offset in case of fault in strncpy_from_kernel_nofault()	2022-11-25 17:45:53 +01:00
madvise.c	mm: drop the assumption that VM_SHARED always implies writable	2025-08-28 16:22:54 +02:00
Makefile
mapping_dirty_helpers.c
memblock.c	Revert "mm: Always release pages to the buddy allocator in memblock_free_late()."	2023-02-22 12:55:56 +01:00
memcontrol.c	memcg: always call cond_resched() after fn()	2025-06-04 14:37:08 +02:00
memfd.c	mm: reinstate ability to map write-sealed memfd mappings read-only	2025-08-28 16:22:55 +02:00
memory_hotplug.c	mm/memory_hotplug: use pfn math in place of direct struct page manipulation	2023-11-28 16:54:58 +00:00
memory-failure.c	mm/memory-failure: fix an incorrect use of tail pages	2024-04-13 12:59:01 +02:00
memory.c	mm: fix apply_to_existing_page_range()	2025-05-02 07:41:09 +02:00
mempolicy.c	migrate: hugetlb: check for hugetlb shared PMD in node migration	2023-02-15 17:22:21 +01:00
mempool.c
memremap.c	mm/memremap.c: map FS_DAX device memory as decrypted	2022-11-16 09:57:17 +01:00
memtest.c	memtest: use {READ,WRITE}_ONCE in memory scanning	2024-04-13 12:58:39 +02:00
migrate.c	mm/migrate: set swap entry values of THP tail pages properly.	2024-04-13 12:59:02 +02:00
mincore.c	fs: add file and path permissions helpers	2024-06-21 14:52:58 +02:00
mlock.c
mm_init.c
mmap.c	mm: reinstate ability to map write-sealed memfd mappings read-only	2025-08-28 16:22:55 +02:00
mmu_gather.c	mm/khugepaged: fix GUP-fast interaction by sending IPI	2022-12-14 11:31:55 +01:00
mmu_notifier.c	mm/mmu_notifier.c: fix race in mmu_interval_notifier_remove()	2022-04-27 13:53:54 +02:00
mmzone.c	arm: remove CONFIG_ARCH_HAS_HOLES_MEMORYMODEL	2022-05-15 20:00:09 +02:00
mprotect.c	mm: don't try to NUMA-migrate COW pages that have other uses	2022-02-23 12:00:57 +01:00
mremap.c	mm/mremap: hold the rmap lock in write mode when moving page table entries.	2022-08-21 15:15:21 +02:00
msync.c
nommu.c	mm: refactor arch_calc_vm_flag_bits() and arm64 MTE handling	2024-12-14 19:47:40 +01:00
oom_kill.c	memcg: fix soft lockup in the OOM process	2025-03-13 12:47:26 +01:00
page_alloc.c	mm/page_alloc: detect allocation forbidden by cpuset and bail out early	2025-08-28 16:22:58 +02:00
page_counter.c
page_ext.c
page_idle.c
page_io.c	mm: fix unexpected zeroed page mapping with zram swap	2022-04-20 09:23:25 +02:00
page_isolation.c
page_owner.c
page_poison.c
page_reporting.c
page_reporting.h
page_vma_mapped.c	mm/thp: another PVMW_SYNC fix in page_vma_mapped_walk()	2021-06-30 08:47:29 -04:00
page-writeback.c	mm: fix ratelimit_pages update error in dirty_ratio_handler()	2025-06-27 11:04:14 +01:00
pagewalk.c	mm: pagewalk: Fix race between unmap and page walker	2022-09-08 11:11:38 +02:00
percpu-internal.h	percpu: make pcpu_nr_empty_pop_pages per chunk type	2021-04-14 08:42:03 +02:00
percpu-km.c
percpu-stats.c	percpu: make pcpu_nr_empty_pop_pages per chunk type	2021-04-14 08:42:03 +02:00
percpu-vm.c
percpu.c	percpu: make pcpu_nr_empty_pop_pages per chunk type	2021-04-14 08:42:03 +02:00
pgalloc-track.h
pgtable-generic.c	mm/thp: fix __split_huge_pmd_locked() on shmem migration entry	2021-06-30 08:47:26 -04:00
process_vm_access.c	mm/process_vm_access.c: include compat.h	2021-01-19 18:27:21 +01:00
ptdump.c	mm/ptdump: take the memory hotplug lock inside ptdump_walk_pgd()	2025-08-28 16:22:55 +02:00
readahead.c	vfs: fix readahead(2) on block devices	2023-11-20 11:06:44 +01:00
rmap.c	mm/rmap: Fix anon_vma->degree ambiguity leading to double-reuse	2022-09-05 10:28:56 +02:00
rodata_test.c
shmem.c	mm: update memfd seal write check to include F_SEAL_WRITE	2025-08-28 16:22:55 +02:00
shuffle.c
shuffle.h
slab_common.c	mm: krealloc: Fix MTE false alarm in __do_krealloc	2024-11-17 14:59:40 +01:00
slab.c	mm/sl?b.c: remove ctor argument from kmem_cache_flags	2021-05-14 09:50:45 +02:00
slab.h	mm: extract might_alloc() debug check	2025-08-28 16:22:37 +02:00
slob.c	mm: extract might_alloc() debug check	2025-08-28 16:22:37 +02:00
slub.c	mm/slub: avoid accessing metadata when pointer is invalid in object_err()	2025-09-09 18:45:22 +02:00
sparse-vmemmap.c
sparse.c	mm/sparsemem: fix race in accessing memory_section->usage	2024-02-23 08:42:00 +01:00
swap_cgroup.c
swap_slots.c
swap_state.c	mm: swap: get rid of livelock in swapin readahead	2022-03-23 09:13:27 +01:00
swap.c
swapfile.c	mm/swapfile: skip HugeTLB pages for unuse_vma	2024-10-22 15:39:24 +02:00
truncate.c	mm/thp: unmap_mapping_page() to fix THP truncate_cleanup_page()	2021-06-30 08:47:27 -04:00
usercopy.c	mm/usercopy: return 1 from hardened_usercopy __setup() handler	2022-04-08 14:40:43 +02:00
userfaultfd.c	userfaultfd: fix mmap_changing checking in mfill_atomic_hugetlb	2024-03-01 13:16:43 +01:00
util.c	mm: unconditionally close VMAs on error	2024-12-14 19:47:40 +01:00
vmacache.c
vmalloc.c	mm/vmalloc: leave lazy MMU mode on PTE mapping error	2025-08-28 16:22:29 +02:00
vmpressure.c
vmscan.c	mm: add missing release barrier on PGDAT_RECLAIM_LOCKED unlock	2025-05-02 07:40:56 +02:00
vmstat.c	arm: remove CONFIG_ARCH_HAS_HOLES_MEMORYMODEL	2022-05-15 20:00:09 +02:00
workingset.c
z3fold.c	mm/z3fold: use release_z3fold_page_locked() to release locked z3fold page	2021-07-14 16:56:51 +02:00
zbud.c
zpool.c
zsmalloc.c	mm/zsmalloc: do not pass __GFP_MOVABLE if CONFIG_COMPACTION=n	2025-08-28 16:22:53 +02:00
zswap.c