==================================================================
BUG: KASAN: use-after-free in instrument_atomic_read_write include/linux/instrumented.h:101 [inline]
BUG: KASAN: use-after-free in atomic_inc include/linux/atomic/atomic-instrumented.h:181 [inline]
BUG: KASAN: use-after-free in kernfs_get+0x5c/0x90 fs/kernfs/dir.c:505
Write of size 4 at addr ffff888155704af0 by task kworker/0:4/16876
CPU: 0 PID: 16876 Comm: kworker/0:4 Tainted: G W 5.15.169-syzkaller-00127-gfa1d8b6c5d4d #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
Workqueue: events flush_stashed_error_work
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x151/0x1c0 lib/dump_stack.c:106
print_address_description+0x87/0x3b0 mm/kasan/report.c:248
__kasan_report mm/kasan/report.c:427 [inline]
kasan_report+0x179/0x1c0 mm/kasan/report.c:444
kasan_check_range+0x293/0x2a0 mm/kasan/generic.c:189
__kasan_check_write+0x14/0x20 mm/kasan/shadow.c:37
instrument_atomic_read_write include/linux/instrumented.h:101 [inline]
atomic_inc include/linux/atomic/atomic-instrumented.h:181 [inline]
kernfs_get+0x5c/0x90 fs/kernfs/dir.c:505
sysfs_notify+0x9a/0xd0 fs/sysfs/file.c:190
ext4_notify_error_sysfs+0x25/0x30 fs/ext4/sysfs.c:516
flush_stashed_error_work+0x302/0x320
process_one_work+0x6bb/0xc10 kernel/workqueue.c:2325
worker_thread+0xad5/0x12a0 kernel/workqueue.c:2472
kthread+0x421/0x510 kernel/kthread.c:337
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287
Allocated by task 20328:
kasan_save_stack mm/kasan/common.c:38 [inline]
kasan_set_track mm/kasan/common.c:45 [inline]
set_alloc_info mm/kasan/common.c:433 [inline]
__kasan_slab_alloc+0xb1/0xe0 mm/kasan/common.c:466
kasan_slab_alloc include/linux/kasan.h:217 [inline]
slab_post_alloc_hook+0x53/0x2c0 mm/slab.h:550
slab_alloc_node mm/slub.c:3240 [inline]
slab_alloc mm/slub.c:3248 [inline]
kmem_cache_alloc+0xf5/0x200 mm/slub.c:3253
kmem_cache_zalloc include/linux/slab.h:723 [inline]
__kernfs_new_node+0xdb/0x700 fs/kernfs/dir.c:593
kernfs_new_node+0x130/0x230 fs/kernfs/dir.c:669
kernfs_create_dir_ns+0x44/0x130 fs/kernfs/dir.c:1017
sysfs_create_dir_ns+0x185/0x390 fs/sysfs/dir.c:59
create_dir lib/kobject.c:89 [inline]
kobject_add_internal+0x763/0xd90 lib/kobject.c:263
kobject_add_varg lib/kobject.c:398 [inline]
kobject_init_and_add+0x120/0x190 lib/kobject.c:481
ext4_register_sysfs+0xbf/0x2c0 fs/ext4/sysfs.c:529
ext4_fill_super+0x8a31/0x96e0 fs/ext4/super.c:4941
mount_bdev+0x282/0x3b0 fs/super.c:1400
ext4_mount+0x34/0x40 fs/ext4/super.c:6594
legacy_get_tree+0xf1/0x190 fs/fs_context.c:611
vfs_get_tree+0x88/0x290 fs/super.c:1530
do_new_mount+0x2ba/0xb30 fs/namespace.c:3012
path_mount+0x671/0x1070 fs/namespace.c:3342
do_mount fs/namespace.c:3355 [inline]
__do_sys_mount fs/namespace.c:3563 [inline]
__se_sys_mount+0x2c4/0x3b0 fs/namespace.c:3540
__x64_sys_mount+0xbf/0xd0 fs/namespace.c:3540
x64_sys_call+0x49d/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:166
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x66/0xd0
The buggy address belongs to the object at ffff888155704af0
which belongs to the cache kernfs_node_cache of size 136
The buggy address is located 0 bytes inside of
136-byte region [ffff888155704af0, ffff888155704b78)
The buggy address belongs to the page:
page:ffffea000555c100 refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff888155704e10 pfn:0x155704
flags: 0x4000000000000200(slab|zone=1)
raw: 4000000000000200 0000000000000000 0000000100000001 ffff8881001c5980
raw: ffff888155704e10 0000000080140008 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 0, migratetype Unmovable, gfp_mask 0x112cc0(GFP_USER|__GFP_NOWARN|__GFP_NORETRY), pid 2094, ts 163595118488, free_ts 163592333259
set_page_owner include/linux/page_owner.h:33 [inline]
post_alloc_hook+0x1a3/0x1b0 mm/page_alloc.c:2605
prep_new_page+0x1b/0x110 mm/page_alloc.c:2611
get_page_from_freelist+0x3550/0x35d0 mm/page_alloc.c:4485
__alloc_pages+0x27e/0x8f0 mm/page_alloc.c:5779
allocate_slab mm/slub.c:1932 [inline]
new_slab+0x9a/0x4e0 mm/slub.c:1995
___slab_alloc+0x39e/0x830 mm/slub.c:3028
__slab_alloc+0x4a/0x90 mm/slub.c:3115
slab_alloc_node mm/slub.c:3206 [inline]
slab_alloc mm/slub.c:3248 [inline]
kmem_cache_alloc+0x134/0x200 mm/slub.c:3253
kmem_cache_zalloc include/linux/slab.h:723 [inline]
__kernfs_new_node+0xdb/0x700 fs/kernfs/dir.c:593
kernfs_new_node+0x130/0x230 fs/kernfs/dir.c:669
__kernfs_create_file+0x4a/0x270 fs/kernfs/file.c:987
sysfs_add_file_mode_ns+0x273/0x320 fs/sysfs/file.c:317
sysfs_merge_group+0x1fe/0x450 fs/sysfs/group.c:343
dpm_sysfs_add+0xec/0x2b0 drivers/base/power/sysfs.c:707
device_add+0x6df/0xf10 drivers/base/core.c:3382
netdev_register_kobject+0x177/0x320 net/core/net-sysfs.c:2014
page last free stack trace:
reset_page_owner include/linux/page_owner.h:26 [inline]
free_pages_prepare mm/page_alloc.c:1472 [inline]
free_pcp_prepare mm/page_alloc.c:1544 [inline]
free_unref_page_prepare+0x7c8/0x7d0 mm/page_alloc.c:3534
free_unref_page+0xe8/0x750 mm/page_alloc.c:3616
free_the_page mm/page_alloc.c:805 [inline]
__free_pages+0x61/0xf0 mm/page_alloc.c:5855
__free_slab+0xec/0x1d0 mm/slub.c:2020
free_slab mm/slub.c:2035 [inline]
discard_slab mm/slub.c:2041 [inline]
__unfreeze_partials+0x165/0x1a0 mm/slub.c:2527
put_cpu_partial+0xc4/0x120 mm/slub.c:2607
__slab_free+0x1c8/0x290 mm/slub.c:3388
do_slab_free mm/slub.c:3507 [inline]
___cache_free+0x109/0x120 mm/slub.c:3526
qlink_free+0x4d/0x90 mm/kasan/quarantine.c:157
qlist_free_all+0x44/0xb0 mm/kasan/quarantine.c:176
kasan_quarantine_reduce+0x15a/0x180 mm/kasan/quarantine.c:283
__kasan_slab_alloc+0x2f/0xe0 mm/kasan/common.c:443
kasan_slab_alloc include/linux/kasan.h:217 [inline]
slab_post_alloc_hook+0x53/0x2c0 mm/slab.h:550
slab_alloc_node mm/slub.c:3240 [inline]
slab_alloc mm/slub.c:3248 [inline]
kmem_cache_alloc+0xf5/0x200 mm/slub.c:3253
kmem_cache_alloc_node include/linux/slab.h:474 [inline]
__alloc_skb+0xbe/0x550 net/core/skbuff.c:416
alloc_skb include/linux/skbuff.h:1183 [inline]
nlmsg_new include/net/netlink.h:953 [inline]
rtmsg_ifa+0x1e7/0x3a0 net/ipv4/devinet.c:1927
Memory state around the buggy address:
ffff888155704980: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc
ffff888155704a00: fc fc fc fc fc fb fb fb fb fb fb fb fb fb fb fb
>ffff888155704a80: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fb fb
^
ffff888155704b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc
ffff888155704b80: fc fc fc fc fc fc fc fb fb fb fb fb fb fb fb fb
==================================================================
general protection fault, probably for non-canonical address 0xf44ffc292000092a: 0000 [#1] PREEMPT SMP KASAN
KASAN: maybe wild-memory-access in range [0xa280014900004950-0xa280014900004957]
CPU: 0 PID: 16876 Comm: kworker/0:4 Tainted: G B W 5.15.169-syzkaller-00127-gfa1d8b6c5d4d #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
Workqueue: events flush_stashed_error_work
RIP: 0010:kernfs_root fs/kernfs/kernfs-internal.h:50 [inline]
RIP: 0010:kernfs_find_and_get_ns+0x52/0x110 fs/kernfs/dir.c:884
Code: 08 48 89 f8 48 c1 e8 03 42 80 3c 30 00 74 05 e8 74 1f d5 ff 49 8b 5d 08 48 85 db 49 0f 44 dd 48 83 c3 50 48 89 d8 48 c1 e8 03 <42> 80 3c 30 00 74 08 48 89 df e8 4f 1f d5 ff 4c 8b 33 49 83 c6 68
RSP: 0018:ffffc90000aa7c58 EFLAGS: 00010a02
RAX: 145000292000092a RBX: a280014900004951 RCX: ffffffff81dd9f4c
RDX: 0000000000000000 RSI: 0000000000000292 RDI: ffff888155704af8
RBP: ffffc90000aa7c80 R08: ffffffff8141a43b R09: 0000000000000003
R10: fffffbfff0e9a84c R11: dffffc0000000001 R12: ffffffff858f19e0
R13: ffff888155704af0 R14: dffffc0000000000 R15: 0000000000000000
FS: 0000000000000000(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffd21246000 CR3: 0000000136a32000 CR4: 00000000003506b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
kernfs_find_and_get include/linux/kernfs.h:574 [inline]
sysfs_notify+0x73/0xd0 fs/sysfs/file.c:193
ext4_notify_error_sysfs+0x25/0x30 fs/ext4/sysfs.c:516
flush_stashed_error_work+0x302/0x320
process_one_work+0x6bb/0xc10 kernel/workqueue.c:2325
worker_thread+0xad5/0x12a0 kernel/workqueue.c:2472
kthread+0x421/0x510 kernel/kthread.c:337
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287
Modules linked in:
---[ end trace 2e1927221c725f15 ]---
RIP: 0010:kernfs_root fs/kernfs/kernfs-internal.h:50 [inline]
RIP: 0010:kernfs_find_and_get_ns+0x52/0x110 fs/kernfs/dir.c:884
Code: 08 48 89 f8 48 c1 e8 03 42 80 3c 30 00 74 05 e8 74 1f d5 ff 49 8b 5d 08 48 85 db 49 0f 44 dd 48 83 c3 50 48 89 d8 48 c1 e8 03 <42> 80 3c 30 00 74 08 48 89 df e8 4f 1f d5 ff 4c 8b 33 49 83 c6 68
RSP: 0018:ffffc90000aa7c58 EFLAGS: 00010a02
RAX: 145000292000092a RBX: a280014900004951 RCX: ffffffff81dd9f4c
RDX: 0000000000000000 RSI: 0000000000000292 RDI: ffff888155704af8
RBP: ffffc90000aa7c80 R08: ffffffff8141a43b R09: 0000000000000003
R10: fffffbfff0e9a84c R11: dffffc0000000001 R12: ffffffff858f19e0
R13: ffff888155704af0 R14: dffffc0000000000 R15: 0000000000000000
FS: 0000000000000000(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000110c303ba2 CR3: 000000010c73d000 CR4: 00000000003506b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
0: 08 48 89 or %cl,-0x77(%rax)
3: f8 clc
4: 48 c1 e8 03 shr $0x3,%rax
8: 42 80 3c 30 00 cmpb $0x0,(%rax,%r14,1)
d: 74 05 je 0x14
f: e8 74 1f d5 ff call 0xffd51f88
14: 49 8b 5d 08 mov 0x8(%r13),%rbx
18: 48 85 db test %rbx,%rbx
1b: 49 0f 44 dd cmove %r13,%rbx
1f: 48 83 c3 50 add $0x50,%rbx
23: 48 89 d8 mov %rbx,%rax
26: 48 c1 e8 03 shr $0x3,%rax
* 2a: 42 80 3c 30 00 cmpb $0x0,(%rax,%r14,1) <-- trapping instruction
2f: 74 08 je 0x39
31: 48 89 df mov %rbx,%rdi
34: e8 4f 1f d5 ff call 0xffd51f88
39: 4c 8b 33 mov (%rbx),%r14
3c: 49 83 c6 68 add $0x68,%r14