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BUG: KASAN: slab-use-after-free in instrument_atomic_read include/linux/instrumented.h:68 [inline]
BUG: KASAN: slab-use-after-free in _test_bit include/asm-generic/bitops/instrumented-non-atomic.h:141 [inline]
BUG: KASAN: slab-use-after-free in mapping_inaccessible include/linux/pagemap.h:335 [inline]
BUG: KASAN: slab-use-after-free in move_to_new_folio+0x12e/0x700 mm/migrate.c:1040
Read of size 8 at addr ffff888023b62570 by task kcompactd0/44
CPU: 1 UID: 0 PID: 44 Comm: kcompactd0 Not tainted 6.14.0-syzkaller-01103-g2df0c02dab82 #0 PREEMPT(full)
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
Call Trace:
<TASK>
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:120
print_address_description mm/kasan/report.c:408 [inline]
print_report+0xc3/0x670 mm/kasan/report.c:521
kasan_report+0xe0/0x110 mm/kasan/report.c:634
check_region_inline mm/kasan/generic.c:183 [inline]
kasan_check_range+0xef/0x1a0 mm/kasan/generic.c:189
instrument_atomic_read include/linux/instrumented.h:68 [inline]
_test_bit include/asm-generic/bitops/instrumented-non-atomic.h:141 [inline]
mapping_inaccessible include/linux/pagemap.h:335 [inline]
move_to_new_folio+0x12e/0x700 mm/migrate.c:1040
migrate_folio_move mm/migrate.c:1358 [inline]
migrate_folios_move mm/migrate.c:1710 [inline]
migrate_pages_batch+0x201d/0x31a0 mm/migrate.c:1957
migrate_pages_sync+0x12d/0x8a0 mm/migrate.c:1987
migrate_pages+0x1b28/0x2350 mm/migrate.c:2096
compact_zone+0x1f6d/0x4220 mm/compaction.c:2663
compact_node+0x1a4/0x2d0 mm/compaction.c:2932
kcompactd+0x762/0xea0 mm/compaction.c:3227
kthread+0x3a4/0x760 kernel/kthread.c:464
ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:153
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
</TASK>
Allocated by task 11060:
kasan_save_stack+0x33/0x60 mm/kasan/common.c:47
kasan_save_track+0x14/0x30 mm/kasan/common.c:68
unpoison_slab_object mm/kasan/common.c:319 [inline]
__kasan_slab_alloc+0x89/0x90 mm/kasan/common.c:345
kasan_slab_alloc include/linux/kasan.h:250 [inline]
slab_post_alloc_hook mm/slub.c:4138 [inline]
slab_alloc_node mm/slub.c:4187 [inline]
kmem_cache_alloc_lru_noprof+0x1d0/0x3b0 mm/slub.c:4206
shmem_alloc_inode+0x25/0x50 mm/shmem.c:5160
alloc_inode+0x61/0x240 fs/inode.c:346
new_inode+0x22/0x1c0 fs/inode.c:1145
__shmem_get_inode mm/shmem.c:3058 [inline]
shmem_get_inode+0x19a/0xfb0 mm/shmem.c:3132
shmem_mknod+0x1a8/0x450 mm/shmem.c:3854
lookup_open.isra.0+0x11d0/0x1580 fs/namei.c:3666
open_last_lookups fs/namei.c:3765 [inline]
path_openat+0x905/0x2d40 fs/namei.c:4001
do_filp_open+0x20b/0x470 fs/namei.c:4031
do_sys_openat2+0x11b/0x1d0 fs/open.c:1429
do_sys_open fs/open.c:1444 [inline]
__do_sys_openat fs/open.c:1460 [inline]
__se_sys_openat fs/open.c:1455 [inline]
__x64_sys_openat+0x174/0x210 fs/open.c:1455
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xcd/0x260 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
Freed by task 19867:
kasan_save_stack+0x33/0x60 mm/kasan/common.c:47
kasan_save_track+0x14/0x30 mm/kasan/common.c:68
kasan_save_free_info+0x3b/0x60 mm/kasan/generic.c:576
poison_slab_object mm/kasan/common.c:247 [inline]
__kasan_slab_free+0x51/0x70 mm/kasan/common.c:264
kasan_slab_free include/linux/kasan.h:233 [inline]
slab_free_hook mm/slub.c:2376 [inline]
slab_free mm/slub.c:4633 [inline]
kmem_cache_free+0x2d4/0x4d0 mm/slub.c:4735
i_callback+0x43/0x70 fs/inode.c:325
rcu_do_batch kernel/rcu/tree.c:2568 [inline]
rcu_core+0x799/0x14e0 kernel/rcu/tree.c:2824
handle_softirqs+0x216/0x8e0 kernel/softirq.c:561
__do_softirq kernel/softirq.c:595 [inline]
invoke_softirq kernel/softirq.c:435 [inline]
__irq_exit_rcu+0x109/0x170 kernel/softirq.c:662
irq_exit_rcu+0x9/0x30 kernel/softirq.c:678
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1049 [inline]
sysvec_apic_timer_interrupt+0xa4/0xc0 arch/x86/kernel/apic/apic.c:1049
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
Last potentially related work creation:
kasan_save_stack+0x33/0x60 mm/kasan/common.c:47
kasan_record_aux_stack+0xb8/0xd0 mm/kasan/generic.c:548
__call_rcu_common.constprop.0+0x9a/0x9f0 kernel/rcu/tree.c:3082
destroy_inode+0x12c/0x1b0 fs/inode.c:401
evict+0x5b4/0x920 fs/inode.c:834
iput_final fs/inode.c:1898 [inline]
iput fs/inode.c:1924 [inline]
iput+0x521/0x880 fs/inode.c:1910
dentry_unlink_inode+0x29c/0x480 fs/dcache.c:440
__dentry_kill+0x1d0/0x600 fs/dcache.c:643
dput.part.0+0x4b1/0x9b0 fs/dcache.c:885
dput+0x1f/0x30 fs/dcache.c:875
do_renameat2+0x83b/0xc90 fs/namei.c:5237
__do_sys_rename fs/namei.c:5282 [inline]
__se_sys_rename fs/namei.c:5280 [inline]
__x64_sys_rename+0x7d/0xa0 fs/namei.c:5280
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xcd/0x260 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
The buggy address belongs to the object at ffff888023b620a8
which belongs to the cache shmem_inode_cache of size 1544
The buggy address is located 1224 bytes inside of
freed 1544-byte region [ffff888023b620a8, ffff888023b626b0)
The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x23b60
head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
memcg:ffff888025d16b01
flags: 0xfff00000000040(head|node=0|zone=1|lastcpupid=0x7ff)
page_type: f5(slab)
raw: 00fff00000000040 ffff888040491cc0 ffffea0001aad000 dead000000000002
raw: 0000000000000000 0000000000130013 00000000f5000000 ffff888025d16b01
head: 00fff00000000040 ffff888040491cc0 ffffea0001aad000 dead000000000002
head: 0000000000000000 0000000000130013 00000000f5000000 ffff888025d16b01
head: 00fff00000000003 ffffea00008ed801 ffffffffffffffff 0000000000000000
head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 3, migratetype Unmovable, gfp_mask 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 36, tgid 36 (kdevtmpfs), ts 6786308075, free_ts 0
set_page_owner include/linux/page_owner.h:32 [inline]
post_alloc_hook+0x181/0x1b0 mm/page_alloc.c:1551
prep_new_page mm/page_alloc.c:1559 [inline]
get_page_from_freelist+0x10c4/0x34c0 mm/page_alloc.c:3477
__alloc_frozen_pages_noprof+0x223/0x24d0 mm/page_alloc.c:4740
alloc_pages_mpol+0x1fb/0x540 mm/mempolicy.c:2301
alloc_slab_page mm/slub.c:2446 [inline]
allocate_slab mm/slub.c:2610 [inline]
new_slab+0x23c/0x330 mm/slub.c:2663
___slab_alloc+0xd9c/0x1940 mm/slub.c:3849
__slab_alloc.constprop.0+0x56/0xb0 mm/slub.c:3939
__slab_alloc_node mm/slub.c:4014 [inline]
slab_alloc_node mm/slub.c:4175 [inline]
kmem_cache_alloc_lru_noprof+0xf4/0x3b0 mm/slub.c:4206
shmem_alloc_inode+0x25/0x50 mm/shmem.c:5160
alloc_inode+0x61/0x240 fs/inode.c:346
new_inode+0x22/0x1c0 fs/inode.c:1145
__shmem_get_inode mm/shmem.c:3058 [inline]
shmem_get_inode+0x19a/0xfb0 mm/shmem.c:3132
shmem_mknod+0x1a8/0x450 mm/shmem.c:3854
vfs_mknod+0x5d7/0x8e0 fs/namei.c:4193
handle_create drivers/base/devtmpfs.c:233 [inline]
handle drivers/base/devtmpfs.c:393 [inline]
devtmpfs_work_loop+0x1c8/0x8e0 drivers/base/devtmpfs.c:408
devtmpfsd+0x4c/0x50 drivers/base/devtmpfs.c:450
page_owner free stack trace missing
Memory state around the buggy address:
ffff888023b62400: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff888023b62480: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff888023b62500: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff888023b62580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff888023b62600: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
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