==================================================================
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+0x231/0x1330 mm/migrate.c:1048
Read of size 8 at addr ffff8880249c5328 by task syz.2.2159/15692
CPU: 0 UID: 0 PID: 15692 Comm: syz.2.2159 Not tainted 6.12.0-rc3-syzkaller-00389-g3d5ad2d4eca3 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
Call Trace:
<TASK>
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120
print_address_description mm/kasan/report.c:377 [inline]
print_report+0x169/0x550 mm/kasan/report.c:488
kasan_report+0x143/0x180 mm/kasan/report.c:601
kasan_check_range+0x282/0x290 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+0x231/0x1330 mm/migrate.c:1048
migrate_folio_move mm/migrate.c:1366 [inline]
migrate_pages_batch+0x266b/0x36d0 mm/migrate.c:1897
migrate_pages_sync mm/migrate.c:1963 [inline]
migrate_pages+0x2062/0x3560 mm/migrate.c:2072
compact_zone+0x3404/0x4af0 mm/compaction.c:2641
compact_node mm/compaction.c:2910 [inline]
compact_nodes mm/compaction.c:2932 [inline]
sysctl_compaction_handler+0x496/0x990 mm/compaction.c:2983
proc_sys_call_handler+0x550/0x8b0 fs/proc/proc_sysctl.c:595
iter_file_splice_write+0xbfa/0x1510 fs/splice.c:743
do_splice_from fs/splice.c:941 [inline]
direct_splice_actor+0x11b/0x220 fs/splice.c:1164
splice_direct_to_actor+0x586/0xc80 fs/splice.c:1108
do_splice_direct_actor fs/splice.c:1207 [inline]
do_splice_direct+0x289/0x3e0 fs/splice.c:1233
do_sendfile+0x561/0xe10 fs/read_write.c:1388
__do_sys_sendfile64 fs/read_write.c:1449 [inline]
__se_sys_sendfile64+0x100/0x1e0 fs/read_write.c:1441
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f591757dff9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f591844e038 EFLAGS: 00000246 ORIG_RAX: 0000000000000028
RAX: ffffffffffffffda RBX: 00007f5917735f80 RCX: 00007f591757dff9
RDX: 00000000200000c0 RSI: 0000000000000003 RDI: 0000000000000005
RBP: 00007f59175f0296 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000005 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f5917735f80 R15: 00007f591785fa28
</TASK>
Allocated by task 27:
kasan_save_stack mm/kasan/common.c:47 [inline]
kasan_save_track+0x3f/0x80 mm/kasan/common.c:68
unpoison_slab_object mm/kasan/common.c:319 [inline]
__kasan_slab_alloc+0x66/0x80 mm/kasan/common.c:345
kasan_slab_alloc include/linux/kasan.h:247 [inline]
slab_post_alloc_hook mm/slub.c:4085 [inline]
slab_alloc_node mm/slub.c:4134 [inline]
kmem_cache_alloc_lru_noprof+0x139/0x2b0 mm/slub.c:4153
shmem_alloc_inode+0x28/0x40 mm/shmem.c:4764
alloc_inode+0x65/0x1a0 fs/inode.c:265
new_inode_pseudo fs/inode.c:1104 [inline]
new_inode+0x22/0x1d0 fs/inode.c:1123
__shmem_get_inode mm/shmem.c:2801 [inline]
shmem_get_inode+0x34a/0xd70 mm/shmem.c:2872
shmem_mknod+0x5f/0x1e0 mm/shmem.c:3568
vfs_mknod+0x36d/0x3b0 fs/namei.c:4135
handle_create drivers/base/devtmpfs.c:219 [inline]
handle drivers/base/devtmpfs.c:384 [inline]
devtmpfs_work_loop+0x963/0x1040 drivers/base/devtmpfs.c:399
devtmpfsd+0x4c/0x50 drivers/base/devtmpfs.c:441
kthread+0x2f0/0x390 kernel/kthread.c:389
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
Freed by task 24:
kasan_save_stack mm/kasan/common.c:47 [inline]
kasan_save_track+0x3f/0x80 mm/kasan/common.c:68
kasan_save_free_info+0x40/0x50 mm/kasan/generic.c:579
poison_slab_object mm/kasan/common.c:247 [inline]
__kasan_slab_free+0x59/0x70 mm/kasan/common.c:264
kasan_slab_free include/linux/kasan.h:230 [inline]
slab_free_hook mm/slub.c:2342 [inline]
slab_free mm/slub.c:4579 [inline]
kmem_cache_free+0x1a2/0x420 mm/slub.c:4681
rcu_do_batch kernel/rcu/tree.c:2567 [inline]
rcu_core+0xaaa/0x17a0 kernel/rcu/tree.c:2823
handle_softirqs+0x2c5/0x980 kernel/softirq.c:554
run_ksoftirqd+0xca/0x130 kernel/softirq.c:927
smpboot_thread_fn+0x544/0xa30 kernel/smpboot.c:164
kthread+0x2f0/0x390 kernel/kthread.c:389
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
Last potentially related work creation:
kasan_save_stack+0x3f/0x60 mm/kasan/common.c:47
__kasan_record_aux_stack+0xac/0xc0 mm/kasan/generic.c:541
__call_rcu_common kernel/rcu/tree.c:3086 [inline]
call_rcu+0x167/0xa70 kernel/rcu/tree.c:3190
destroy_inode fs/inode.c:320 [inline]
evict+0x83c/0x9b0 fs/inode.c:756
do_unlinkat+0x512/0x830 fs/namei.c:4540
__do_sys_unlink fs/namei.c:4581 [inline]
__se_sys_unlink fs/namei.c:4579 [inline]
__x64_sys_unlink+0x47/0x50 fs/namei.c:4579
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
The buggy address belongs to the object at ffff8880249c4e60
which belongs to the cache shmem_inode_cache of size 1544
The buggy address is located 1224 bytes inside of
freed 1544-byte region [ffff8880249c4e60, ffff8880249c5468)
The buggy address belongs to the physical page:
page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x249c0
head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
flags: 0xfff00000000040(head|node=0|zone=1|lastcpupid=0x7ff)
page_type: f5(slab)
raw: 00fff00000000040 ffff888140aaf140 dead000000000122 0000000000000000
raw: 0000000000000000 0000000000130013 00000001f5000000 0000000000000000
head: 00fff00000000040 ffff888140aaf140 dead000000000122 0000000000000000
head: 0000000000000000 0000000000130013 00000001f5000000 0000000000000000
head: 00fff00000000003 ffffea0000927001 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 27, tgid 27 (kdevtmpfs), ts 8737131921, free_ts 0
set_page_owner include/linux/page_owner.h:32 [inline]
post_alloc_hook+0x1f3/0x230 mm/page_alloc.c:1537
prep_new_page mm/page_alloc.c:1545 [inline]
get_page_from_freelist+0x3045/0x3190 mm/page_alloc.c:3457
__alloc_pages_noprof+0x292/0x710 mm/page_alloc.c:4733
alloc_pages_mpol_noprof+0x3e8/0x680 mm/mempolicy.c:2265
alloc_slab_page+0x6a/0x120 mm/slub.c:2412
allocate_slab+0x5a/0x2f0 mm/slub.c:2578
new_slab mm/slub.c:2631 [inline]
___slab_alloc+0xcd1/0x14b0 mm/slub.c:3818
__slab_alloc+0x58/0xa0 mm/slub.c:3908
__slab_alloc_node mm/slub.c:3961 [inline]
slab_alloc_node mm/slub.c:4122 [inline]
kmem_cache_alloc_lru_noprof+0x1c5/0x2b0 mm/slub.c:4153
shmem_alloc_inode+0x28/0x40 mm/shmem.c:4764
alloc_inode+0x65/0x1a0 fs/inode.c:265
new_inode_pseudo fs/inode.c:1104 [inline]
new_inode+0x22/0x1d0 fs/inode.c:1123
__shmem_get_inode mm/shmem.c:2801 [inline]
shmem_get_inode+0x34a/0xd70 mm/shmem.c:2872
shmem_mknod+0x5f/0x1e0 mm/shmem.c:3568
vfs_mknod+0x36d/0x3b0 fs/namei.c:4135
handle_create drivers/base/devtmpfs.c:219 [inline]
handle drivers/base/devtmpfs.c:384 [inline]
devtmpfs_work_loop+0x963/0x1040 drivers/base/devtmpfs.c:399
page_owner free stack trace missing
Memory state around the buggy address:
ffff8880249c5200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff8880249c5280: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff8880249c5300: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff8880249c5380: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff8880249c5400: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc
==================================================================