linux-yocto/mm
Li Qiong 7e28725690 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 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 kasan: disable kasan_non_canonical_hook() for HW tags 2023-12-23 10:42:00 +01:00
kfence kfence: skip __GFP_THISNODE allocations on NUMA systems 2025-03-13 12:50:50 +01:00
backing-dev.c writeback, cgroup: fix null-ptr-deref write in bdi_split_work_to_wbs 2023-05-11 23:00:18 +09:00
balloon_compaction.c
bootmem_info.c bootmem: remove the vmemmap pages from kmemleak in put_page_bootmem 2022-08-31 17:16:48 +02:00
cleancache.c
cma_debug.c
cma_sysfs.c
cma.c mm/cma: drop incorrect alignment check in cma_init_reserved_mem 2024-07-05 09:14:13 +02:00
cma.h
compaction.c mm, vmscan: prevent infinite loop for costly GFP_NOIO | __GFP_RETRY_MAYFAIL allocations 2024-04-10 16:19:37 +02:00
debug_page_ref.c
debug_vm_pgtable.c mm/debug_vm_pgtable: clear page table entries at destroy_args() 2025-08-28 16:24:34 +02:00
debug.c mm/debug: sync up latest migrate_reason to migrate_reason_names 2021-09-24 16:13:35 -07:00
dmapool.c
early_ioremap.c mm/early_ioremap.c: remove redundant early_ioremap_shutdown() 2021-09-08 11:50:24 -07:00
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 highmem: fix checks in __kmap_local_sched_{in,out} 2022-04-13 20:59:21 +02:00
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 mm/hwpoison: avoid the impact of hwpoison_filter() return value on mce handler 2022-07-12 16:35:05 +02:00
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 mm: move ioremap_page_range to vmalloc.c 2021-09-08 11:50:24 -07:00
Kconfig kmap_local: don't assume kmap PTEs are linear arrays in memory 2021-11-25 09:48:43 +01:00
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 mm/ksm: remove old GCC 4.9+ check 2021-09-13 10:18:28 -07:00
list_lru.c
maccess.c maccess: Fix writing offset in case of fault in strncpy_from_kernel_nofault() 2022-11-26 09:24:47 +01:00
madvise.c mm: drop the assumption that VM_SHARED always implies writable 2025-08-28 16:24:30 +02:00
Makefile mm: introduce Data Access MONitor (DAMON) 2021-09-08 11:50:24 -07:00
mapping_dirty_helpers.c
memblock.c memblock: allow to specify flags with memblock_add_node() 2023-12-20 15:17:33 +01:00
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 memblock: allow to specify flags with memblock_add_node() 2023-12-20 15:17:33 +01:00
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 mm/memremap.c: map FS_DAX device memory as decrypted 2022-11-16 09:58:27 +01:00
memtest.c memtest: use {READ,WRITE}_ONCE in memory scanning 2024-04-10 16:18:42 +02:00
migrate.c mm/migrate: set swap entry values of THP tail pages properly. 2024-04-10 16:19:31 +02:00
mincore.c
mlock.c mm/mlock: fix potential imbalanced rlimit ucounts adjustment 2022-05-15 20:18:53 +02:00
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 mm/khugepaged: fix GUP-fast interaction by sending IPI 2022-12-14 11:37:17 +01:00
mmu_notifier.c mm/mmu_notifier.c: fix race in mmu_interval_notifier_remove() 2022-04-27 14:38:58 +02:00
mmzone.c
mprotect.c mm: don't try to NUMA-migrate COW pages that have other uses 2022-02-23 12:03:03 +01:00
mremap.c mmmremap.c: avoid pointless invalidate_range_start/end on mremap(old_size=0) 2022-04-13 20:59:22 +02:00
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 mm/migrate: add CPU hotplug to demotion #ifdef 2021-10-18 20:22:02 -10:00
page_idle.c mm/idle_page_tracking: make PG_idle reusable 2021-09-08 11:50:24 -07:00
page_io.c mm: fix unexpected zeroed page mapping with zram swap 2022-04-20 09:34:18 +02:00
page_isolation.c Merge branch 'akpm' (patches from Andrew) 2021-09-08 12:55:35 -07:00
page_owner.c mm: remove pfn_valid_within() and CONFIG_HOLES_IN_ZONE 2021-09-08 11:50:22 -07:00
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 mm: pagewalk: Fix race between unmap and page walker 2022-09-08 12:28:05 +02:00
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 vfs: fix readahead(2) on block devices 2023-11-20 11:08:13 +01:00
rmap.c mm/rmap: Fix anon_vma->degree ambiguity leading to double-reuse 2022-09-05 10:30:07 +02:00
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 mm, kfence: support kmem_dump_obj() for KFENCE objects 2022-04-27 14:38:51 +02:00
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 mm: Replace deprecated CPU-hotplug functions. 2021-08-28 01:46:17 +02:00
swap_state.c mm: swap: get rid of livelock in swapin readahead 2022-03-23 09:16:41 +01:00
swap.c mm: fs: invalidate bh_lrus for only cold path 2021-09-24 16:13:35 -07:00
swapfile.c mm/swapfile: skip HugeTLB pages for unuse_vma 2024-10-22 15:40:41 +02:00
truncate.c Merge branch 'akpm' (patches from Andrew) 2021-09-03 10:08:28 -07:00
usercopy.c mm/usercopy: return 1 from hardened_usercopy __setup() handler 2022-04-08 14:24:14 +02:00
userfaultfd.c userfaultfd: fix mmap_changing checking in mfill_atomic_hugetlb 2024-03-01 13:21:43 +01:00
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 net-memcg: Fix scope of sockmem pressure indicators 2023-09-19 12:22:33 +02:00
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 memcg: sync flush only if periodic flush is delayed 2022-04-27 14:38:57 +02:00
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