loop7: rw=2049, sector=40, nr_sectors = 4 limit=40
Buffer I/O error on dev loop7, logical block 10, lost async page write
------------[ cut here ]------------
------------[ cut here ]------------
WARNING: CPU: 1 PID: 18043 at fs/kernfs/dir.c:504 kernfs_get.part.0+0x69/0x80
Modules linked in:
CPU: 1 PID: 18043 Comm: kworker/1:0 Not tainted 5.19.0-rc4-next-20220630 #1
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.14.0-0-g155821a1990b-prebuilt.qemu.org 04/01/2014
Workqueue: events kernfs_notify_workfn
RIP: 0010:kernfs_get.part.0+0x69/0x80
Code: 31 ff 89 ee e8 c8 0b a7 ff 85 ed 74 18 e8 ef 0e a7 ff be 04 00 00 00 48 89 df e8 c2 c3 d9 ff f0 ff 03 5b 5d c3 e8 d7 0e a7 ff <0f> 0b eb df 48 89 df e8 6b c0 d9 ff eb c6 66 0f 1f 84 00 00 00 00
RSP: 0018:ffff88806cf09c80 EFLAGS: 00010046
RAX: 0000000000000000 RBX: ffff88801d2e90e8 RCX: 0000000000000100
RDX: ffff888046a15040 RSI: ffffffff819d50a9 RDI: 0000000000000005
RBP: 0000000000000000 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000000001
R13: 1ffffffff0a01e40 R14: ffff88801d2e90e8 R15: ffff888044b5d130
FS: 0000000000000000(0000) GS:ffff88806cf00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2d927000 CR3: 000000001dc64000 CR4: 0000000000350ee0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff4ff0 DR7: 0000000000000400
Call Trace:
kernfs_get+0x1b/0x30
kernfs_notify+0x180/0x350
cgroup_file_notify+0xf5/0x1a0
call_timer_fn+0x17d/0x5f0
__run_timers.part.0+0x65e/0xa50
run_timer_softirq+0xae/0x1a0
__do_softirq+0x270/0x8c7
__irq_exit_rcu+0x113/0x170
irq_exit_rcu+0x5/0x20
sysvec_apic_timer_interrupt+0x8e/0xc0
asm_sysvec_apic_timer_interrupt+0x1b/0x20
RIP: 0010:__down_trylock_console_sem+0x43/0xd0
Code: 89 e6 e8 80 63 19 00 4d 85 e4 75 44 e8 86 66 19 00 e8 f1 6f 00 00 48 c7 c7 80 82 1f 85 e8 c5 91 fc ff 41 89 c4 e8 ed 6f 00 00 68 66 19 00 31 ff 44 89 e6 e8 2e 63 19 00 45 85 e4 74 3d e8 54
RSP: 0018:ffff88800d51f9b8 EFLAGS: 00000202
RAX: 000000000002a03d RBX: ffffffff812b68e0 RCX: ffffffff8128648f
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffff88800d51fa08 R08: 0000000000000001 R09: ffffffff86a5d81f
R10: fffffbfff0d4bb03 R11: 0000000000000001 R12: 0000000000000000
R13: 0000000000000000 R14: ffffffff846576c0 R15: ffff88800d51fa58
vprintk_emit+0x167/0x550
vprintk+0x80/0x90
_printk+0xba/0xed
__warn_printk+0x9b/0xf3
kernfs_put.part.0+0x433/0x540
kernfs_put+0x42/0x50
kernfs_notify_workfn+0x417/0x560
process_one_work+0xa17/0x1690
worker_thread+0x637/0x1250
kthread+0x2f2/0x3b0
ret_from_fork+0x22/0x30
irq event stamp: 172099
hardirqs last enabled at (172098): [] _raw_spin_unlock_irq+0x1f/0x40
hardirqs last disabled at (172099): [] _raw_spin_lock_irqsave+0x4e/0x50
softirqs last enabled at (171122): [] __irq_exit_rcu+0x113/0x170
softirqs last disabled at (172095): [] __irq_exit_rcu+0x113/0x170
---[ end trace 0000000000000000 ]---
kernfs_put: syz2/pids.events: released with incorrect active_ref 0
WARNING: CPU: 1 PID: 18043 at fs/kernfs/dir.c:531 kernfs_put.part.0+0x433/0x540
Modules linked in:
CPU: 1 PID: 18043 Comm: kworker/1:0 Tainted: G W 5.19.0-rc4-next-20220630 #1
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.14.0-0-g155821a1990b-prebuilt.qemu.org 04/01/2014
Workqueue: events kernfs_notify_workfn
RIP: 0010:kernfs_put.part.0+0x433/0x540
Code: 03 80 3c 18 00 0f 85 ea 00 00 00 4d 8b 7d 38 e8 73 0a a7 ff 48 8b 14 24 44 89 f1 4c 89 fe 48 c7 c7 20 58 72 84 e8 7e 40 6c 02 <0f> 0b e9 b9 fc ff ff 48 89 ef e8 fe bb d9 ff e9 c1 fd ff ff e8 f4
RSP: 0018:ffff88800d51fbd8 EFLAGS: 00010286
RAX: 0000000000000000 RBX: dffffc0000000000 RCX: 0000000000000000
RDX: ffff888046a15040 RSI: ffffffff812b68e8 RDI: ffffed1001aa3f6d
RBP: ffff88801d2e9120 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000001 R12: ffff88801d2e90e8
R13: ffff888042c18cb0 R14: 0000000000000000 R15: ffff888013e93d20
FS: 0000000000000000(0000) GS:ffff88806cf00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2d927000 CR3: 000000001dc64000 CR4: 0000000000350ee0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff4ff0 DR7: 0000000000000400
Call Trace:
kernfs_put+0x42/0x50
kernfs_notify_workfn+0x417/0x560
process_one_work+0xa17/0x1690
worker_thread+0x637/0x1250
kthread+0x2f2/0x3b0
ret_from_fork+0x22/0x30
irq event stamp: 172933
hardirqs last enabled at (172943): [] __up_console_sem+0x78/0x80
hardirqs last disabled at (172954): [] __up_console_sem+0x5d/0x80
softirqs last enabled at (172112): [] __irq_exit_rcu+0x113/0x170
softirqs last disabled at (172095): [] __irq_exit_rcu+0x113/0x170
---[ end trace 0000000000000000 ]---
==================================================================
BUG: KASAN: use-after-free in llist_del_first+0x89/0xa0
Read of size 8 at addr ffff88801d2e9168 by task kworker/1:0/18043
CPU: 1 PID: 18043 Comm: kworker/1:0 Tainted: G W 5.19.0-rc4-next-20220630 #1
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.14.0-0-g155821a1990b-prebuilt.qemu.org 04/01/2014
Workqueue: events kernfs_notify_workfn
Call Trace:
dump_stack_lvl+0x8b/0xb3
print_report.cold+0x5e/0x5e1
kasan_report+0xbe/0x1c0
llist_del_first+0x89/0xa0
kernfs_notify_workfn+0x78/0x560
process_one_work+0xa17/0x1690
worker_thread+0x637/0x1250
kthread+0x2f2/0x3b0
ret_from_fork+0x22/0x30
Allocated by task 851:
kasan_save_stack+0x1e/0x40
__kasan_slab_alloc+0x66/0x80
kmem_cache_alloc+0x1b1/0x490
__kernfs_new_node+0xd4/0x8b0
kernfs_new_node+0x93/0x120
__kernfs_create_file+0x51/0x350
cgroup_addrm_files+0x3e2/0x9d0
css_populate_dir+0x19b/0x450
cgroup_apply_control_enable+0x3ae/0xa40
cgroup_mkdir+0x824/0x11f0
kernfs_iop_mkdir+0x149/0x1d0
vfs_mkdir+0x417/0x6a0
do_mkdirat+0x17b/0x2e0
__x64_sys_mkdir+0xf2/0x140
do_syscall_64+0x3b/0x90
entry_SYSCALL_64_after_hwframe+0x46/0xb0
Freed by task 18043:
kasan_save_stack+0x1e/0x40
kasan_set_track+0x21/0x30
kasan_set_free_info+0x20/0x30
____kasan_slab_free+0x14b/0x1a0
kmem_cache_free+0xfb/0x600
kernfs_put.part.0+0x2c7/0x540
kernfs_put+0x42/0x50
kernfs_notify_workfn+0x417/0x560
process_one_work+0xa17/0x1690
worker_thread+0x637/0x1250
kthread+0x2f2/0x3b0
ret_from_fork+0x22/0x30
The buggy address belongs to the object at ffff88801d2e90e8
which belongs to the cache kernfs_node_cache of size 168
The buggy address is located 128 bytes inside of
168-byte region [ffff88801d2e90e8, ffff88801d2e9190)
The buggy address belongs to the physical page:
page:00000000b33a45bc refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1d2e9
flags: 0x100000000000200(slab|node=0|zone=1)
raw: 0100000000000200 0000000000000000 dead000000000122 ffff8880080718c0
raw: 0000000000000000 0000000000110011 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected
Memory state around the buggy address:
ffff88801d2e9000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
ffff88801d2e9080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb
>ffff88801d2e9100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff88801d2e9180: fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00
ffff88801d2e9200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc
==================================================================
----------------
Code disassembly (best guess):
0: 89 e6 mov %esp,%esi
2: e8 80 63 19 00 callq 0x196387
7: 4d 85 e4 test %r12,%r12
a: 75 44 jne 0x50
c: e8 86 66 19 00 callq 0x196697
11: e8 f1 6f 00 00 callq 0x7007
16: 48 c7 c7 80 82 1f 85 mov $0xffffffff851f8280,%rdi
1d: e8 c5 91 fc ff callq 0xfffc91e7
22: 41 89 c4 mov %eax,%r12d
25: e8 ed 6f 00 00 callq 0x7017
* 2a: e8 68 66 19 00 callq 0x196697 <-- trapping instruction
2f: 31 ff xor %edi,%edi
31: 44 89 e6 mov %r12d,%esi
34: e8 2e 63 19 00 callq 0x196367
39: 45 85 e4 test %r12d,%r12d
3c: 74 3d je 0x7b
3e: e8 .byte 0xe8
3f: 54 push %rsp