Li Qiong 1f0797f179 mm/slub: avoid accessing metadata when pointer is invalid in object_err() ... [ Upstream commit b4efccec8d ] 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> [ Adjust context ] Signed-off-by: Sasha Levin <sashal@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2025-09-09 18:54:18 +02:00
..
damon	mm/damon/vaddr: fix issue in damon_va_evenly_split_region()	2024-12-14 19:54:52 +01:00
kasan	kasan: use vmalloc_dump_obj() for vmalloc error reports	2025-08-15 12:04:49 +02:00
kfence	kfence: skip __GFP_THISNODE allocations on NUMA systems	2025-02-21 13:49:48 +01:00
kmsan	dma: kmsan: export kmsan_handle_dma() for modules	2025-03-13 12:53:15 +01:00
backing-dev.c
balloon_compaction.c
bootmem_info.c
cma_debug.c
cma_sysfs.c
cma.c	mm/cma: drop incorrect alignment check in cma_init_reserved_mem	2024-06-16 13:41:39 +02:00
cma.h
compaction.c	mm, vmscan: prevent infinite loop for costly GFP_NOIO | __GFP_RETRY_MAYFAIL allocations	2024-04-03 15:19:42 +02:00
debug_page_ref.c
debug_vm_pgtable.c	mm/debug_vm_pgtable: clear page table entries at destroy_args()	2025-08-28 16:26:13 +02:00
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 16:26:12 +02:00
folio-compat.c
frontswap.c
gup_test.c
gup_test.h
gup.c	mm: Fix is_zero_page() usage in try_grab_page()	2025-04-25 10:44:01 +02:00
highmem.c
hmm.c	mm/hmm: move pmd_to_hmm_pfn_flags() to the respective #ifdeffery	2025-08-15 12:05:13 +02:00
huge_memory.c	mm/huge_memory: fix dereferencing invalid pmd migration entry	2025-06-27 11:07:38 +01:00
hugetlb_cgroup.c	mm/hugetlb_cgroup: convert hugetlb_cgroup_uncharge_page() to folios	2024-05-17 11:55:52 +02:00
hugetlb_vmemmap.c
hugetlb_vmemmap.h
hugetlb.c	mm/hugetlb: fix huge_pmd_unshare() vs GUP-fast race	2025-06-27 11:07:38 +01:00
hwpoison-inject.c
init-mm.c
internal.h	mm: unconditionally close VMAs on error	2024-11-22 15:37:34 +01:00
interval_tree.c
io-mapping.c
ioremap.c
Kconfig	mm: z3fold: deprecate CONFIG_Z3FOLD	2024-10-17 15:22:05 +02:00
Kconfig.debug
khugepaged.c	mm: khugepaged: fix call hpage_collapse_scan_file() for anonymous vma	2025-08-15 12:04:51 +02:00
kmemleak.c	mm/kmemleak: avoid deadlock by moving pr_warn() outside kmemleak_lock	2025-08-28 16:26:04 +02:00
ksm.c
list_lru.c
maccess.c
madvise.c	mm: drop the assumption that VM_SHARED always implies writable	2025-08-28 16:26:12 +02:00
Makefile
mapping_dirty_helpers.c
memblock.c	x86/numa: Fix the address overlap check in numa_fill_memblks()	2024-03-01 13:26:36 +01:00
memcontrol.c	memcg: always call cond_resched() after fn()	2025-06-04 14:40:21 +02:00
memfd.c	mm: reinstate ability to map write-sealed memfd mappings read-only	2025-08-28 16:26:12 +02:00
memory_hotplug.c	hwpoison, memory_hotplug: lock folio before unmap hwpoisoned folio	2025-05-22 14:10:09 +02:00
memory-failure.c	mm/memory-failure: fix infinite UCE for VM_PFNMAP pfn	2025-08-28 16:26:16 +02:00
memory-tiers.c
memory.c	mm: fix apply_to_existing_page_range()	2025-04-25 10:44:04 +02:00
mempolicy.c	mm/numa_balancing: teach mpol_to_str about the balancing mode	2024-08-03 08:49:40 +02:00
mempool.c
memremap.c
memtest.c	memtest: use {READ,WRITE}_ONCE in memory scanning	2024-04-03 15:19:36 +02:00
migrate_device.c
migrate.c	mm/vmscan: fix a bug calling wakeup_kswapd() with a wrong zone index	2025-05-22 14:10:08 +02:00
mincore.c
mlock.c
mm_init.c
mm_slot.h
mmap_lock.c	mm: mmap_lock: replace get_memcg_path_buf() with on-stack buffer	2024-08-03 08:49:30 +02:00
mmap.c	mm: reinstate ability to map write-sealed memfd mappings read-only	2025-08-28 16:26:12 +02:00
mmu_gather.c
mmu_notifier.c
mmzone.c
mprotect.c
mremap.c
msync.c
nommu.c	mm: add nommu variant of vm_insert_pages()	2025-03-28 21:58:53 +01:00
oom_kill.c	memcg: fix soft lockup in the OOM process	2025-03-07 16:56:29 +01:00
page_alloc.c	mm/page_alloc.c: avoid infinite retries caused by cpuset race	2025-06-04 14:40:21 +02:00
page_counter.c
page_ext.c
page_idle.c
page_io.c
page_isolation.c
page_owner.c
page_poison.c
page_reporting.c
page_reporting.h
page_table_check.c	mm/page_table_check: fix crash on ZONE_DEVICE	2024-06-27 13:46:22 +02:00
page_vma_mapped.c
page-writeback.c	mm: fix ratelimit_pages update error in dirty_ratio_handler()	2025-06-27 11:07:30 +01:00
pagewalk.c
percpu-internal.h
percpu-km.c
percpu-stats.c
percpu-vm.c
percpu.c
pgalloc-track.h
pgtable-generic.c	mm: fix race between __split_huge_pmd_locked() and GUP-fast	2024-06-16 13:41:38 +02:00
process_vm_access.c
ptdump.c	mm/ptdump: take the memory hotplug lock inside ptdump_walk_pgd()	2025-08-28 16:26:11 +02:00
readahead.c	mm/readahead: fix large folio support in async readahead	2025-01-09 13:30:06 +01:00
rmap.c	mm/rmap: reject hugetlb folios in folio_make_device_exclusive()	2025-04-25 10:43:42 +02:00
rodata_test.c
secretmem.c	fs: export anon_inode_make_secure_inode() and fix secretmem LSM bypass	2025-07-17 18:32:10 +02:00
shmem.c	mm: update memfd seal write check to include F_SEAL_WRITE	2025-08-28 16:26:12 +02:00
shrinker_debug.c
shuffle.c
shuffle.h
slab_common.c	mm: krealloc: Fix MTE false alarm in __do_krealloc	2024-11-17 15:07:22 +01:00
slab.c
slab.h
slob.c
slub.c	mm/slub: avoid accessing metadata when pointer is invalid in object_err()	2025-09-09 18:54:18 +02:00
sparse-vmemmap.c
sparse.c	x86/kaslr: Expose and use the end of the physical memory address space	2024-09-12 11:10:17 +02:00
swap_cgroup.c
swap_slots.c
swap_state.c
swap.c	mm: page_alloc: move mlocked flag clearance into free_pages_prepare()	2024-12-14 19:54:31 +01:00
swap.h
swapfile.c	mm/swapfile: skip HugeTLB pages for unuse_vma	2024-10-22 15:56:43 +02:00
truncate.c	mm: Fix missing folio invalidation calls during truncation	2024-09-04 13:25:00 +02:00
usercopy.c
userfaultfd.c
util.c	mm: unconditionally close VMAs on error	2024-11-22 15:37:34 +01:00
vmalloc.c	mm/vmalloc: leave lazy MMU mode on PTE mapping error	2025-07-24 08:51:55 +02:00
vmpressure.c
vmscan.c	mm: add missing release barrier on PGDAT_RECLAIM_LOCKED unlock	2025-04-25 10:43:42 +02:00
vmstat.c	vmstat: call fold_vm_zone_numa_events() before show per zone NUMA event	2024-12-14 19:54:13 +01:00
workingset.c
z3fold.c
zbud.c
zpool.c
zsmalloc.c	mm/zsmalloc: do not pass __GFP_MOVABLE if CONFIG_COMPACTION=n	2025-08-15 12:04:50 +02:00
zswap.c	mm: zswap: fix missing folio cleanup in writeback race path	2024-03-01 13:26:39 +01:00