Li Qiong 7e28725690 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> [ struct page instead of slab ] Signed-off-by: Sasha Levin <sashal@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2025-09-09 18:50:24 +02:00
..
damon	mm/damon/vaddr: fix issue in damon_va_evenly_split_region()	2024-12-14 19:51:45 +01:00
kasan
kfence	kfence: skip __GFP_THISNODE allocations on NUMA systems	2025-03-13 12:50:50 +01:00
backing-dev.c
balloon_compaction.c
bootmem_info.c
cleancache.c
cma_debug.c
cma_sysfs.c
cma.c
cma.h
compaction.c
debug_page_ref.c
debug_vm_pgtable.c	mm/debug_vm_pgtable: clear page table entries at destroy_args()	2025-08-28 16:24:34 +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 16:24:30 +02:00
frontswap.c
gup_test.c
gup_test.h
gup.c	mm/gup: fix wrongly calculated returned value in fault_in_safe_writeable()	2025-05-02 07:44:13 +02:00
highmem.c
hmm.c	mm/hmm: move pmd_to_hmm_pfn_flags() to the respective #ifdeffery	2025-08-28 16:24:14 +02:00
huge_memory.c	mm/huge_memory: fix dereferencing invalid pmd migration entry	2025-06-27 11:05:37 +01:00
hugetlb_cgroup.c
hugetlb_vmemmap.c
hugetlb_vmemmap.h
hugetlb.c	mm/hugetlb: fix huge_pmd_unshare() vs GUP-fast race	2025-06-27 11:05:35 +01:00
hwpoison-inject.c
init-mm.c
internal.h	mm: unconditionally close VMAs on error	2024-12-14 19:50:38 +01:00
interval_tree.c
io-mapping.c
ioremap.c
Kconfig
Kconfig.debug
khugepaged.c	mm/khugepaged: fix ->anon_vma race	2025-09-09 18:50:22 +02:00
kmemleak.c	mm/kmemleak: avoid deadlock by moving pr_warn() outside kmemleak_lock	2025-08-28 16:24:27 +02:00
ksm.c
list_lru.c
maccess.c
madvise.c	mm: drop the assumption that VM_SHARED always implies writable	2025-08-28 16:24:30 +02:00
Makefile
mapping_dirty_helpers.c
memblock.c
memcontrol.c	memcg: always call cond_resched() after fn()	2025-06-04 14:38:06 +02:00
memfd.c	mm: reinstate ability to map write-sealed memfd mappings read-only	2025-08-28 16:24:30 +02:00
memory_hotplug.c
memory-failure.c	mm/memory-failure: fix infinite UCE for VM_PFNMAP pfn	2025-08-28 16:24:37 +02:00
memory.c	mm: fix apply_to_existing_page_range()	2025-05-02 07:44:24 +02:00
mempolicy.c	mm/numa_balancing: teach mpol_to_str about the balancing mode	2024-08-19 05:45:17 +02:00
mempool.c
memremap.c
memtest.c
migrate.c
mincore.c
mlock.c
mm_init.c
mmap_lock.c	mm: mmap_lock: replace get_memcg_path_buf() with on-stack buffer	2024-08-19 05:45:10 +02:00
mmap.c	mm: reinstate ability to map write-sealed memfd mappings read-only	2025-08-28 16:24:30 +02:00
mmu_gather.c
mmu_notifier.c
mmzone.c
mprotect.c
mremap.c
msync.c
nommu.c	mm: refactor arch_calc_vm_flag_bits() and arm64 MTE handling	2024-12-14 19:50:38 +01:00
oom_kill.c	memcg: fix soft lockup in the OOM process	2025-03-13 12:50:48 +01:00
page_alloc.c	mm/page_alloc: detect allocation forbidden by cpuset and bail out early	2025-08-28 16:24:37 +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_vma_mapped.c
page-writeback.c	mm: fix ratelimit_pages update error in dirty_ratio_handler()	2025-06-27 11:05:26 +01:00
pagewalk.c
percpu-internal.h
percpu-km.c
percpu-stats.c
percpu-vm.c
percpu.c	memblock: drop memblock_free_early_nid() and memblock_free_early()	2025-03-13 12:50:07 +01:00
pgalloc-track.h
pgtable-generic.c
process_vm_access.c
ptdump.c	mm/ptdump: take the memory hotplug lock inside ptdump_walk_pgd()	2025-08-28 16:24:32 +02:00
readahead.c
rmap.c
rodata_test.c
secretmem.c	secretmem: disable memfd_secret() if arch cannot set direct map	2024-10-22 15:40:41 +02:00
shmem.c	mm: update memfd seal write check to include F_SEAL_WRITE	2025-08-28 16:24:30 +02:00
shuffle.c
shuffle.h
slab_common.c	mm, slab: remove duplicate kernel-doc comment for ksize()	2025-04-10 14:32:06 +02:00
slab.c	slab: Introduce kmalloc_size_roundup()	2025-04-10 14:31:49 +02:00
slab.h
slob.c	slab: Introduce kmalloc_size_roundup()	2025-04-10 14:31:49 +02:00
slub.c	mm/slub: avoid accessing metadata when pointer is invalid in object_err()	2025-09-09 18:50:24 +02:00
sparse-vmemmap.c
sparse.c	memblock: drop memblock_free_early_nid() and memblock_free_early()	2025-03-13 12:50:07 +01:00
swap_cgroup.c
swap_slots.c
swap_state.c
swap.c
swapfile.c	mm/swapfile: skip HugeTLB pages for unuse_vma	2024-10-22 15:40:41 +02:00
truncate.c
usercopy.c
userfaultfd.c
util.c	mm: unconditionally close VMAs on error	2024-12-14 19:50:38 +01:00
vmacache.c
vmalloc.c	mm/vmalloc: leave lazy MMU mode on PTE mapping error	2025-08-28 16:24:03 +02:00
vmpressure.c
vmscan.c	mm: add missing release barrier on PGDAT_RECLAIM_LOCKED unlock	2025-05-02 07:44:04 +02:00
vmstat.c	vmstat: call fold_vm_zone_numa_events() before show per zone NUMA event	2024-12-14 19:50:33 +01:00
workingset.c
z3fold.c
zbud.c
zpool.c
zsmalloc.c	mm/zsmalloc: do not pass __GFP_MOVABLE if CONFIG_COMPACTION=n	2025-08-28 16:24:05 +02:00
zswap.c