R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000007
R13: 0000000000000007 R14: 0000000020000040 R15: 0000000000000000
------------[ cut here ]------------
------------[ cut here ]------------
WARNING: CPU: 1 PID: 15640 at fs/kernfs/dir.c:504 kernfs_get.part.0+0x69/0x80
Modules linked in:
CPU: 1 PID: 15640 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: ffff88800ecca000 RCX: 0000000000000100
RDX: ffff888043305040 RSI: ffffffff819d50a9 RDI: 0000000000000005
RBP: 0000000000000000 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000000001
R13: 1ffffffff0a01e40 R14: ffff88800ecca000 R15: ffff88800d7f5d30
FS: 0000000000000000(0000) GS:ffff88806cf00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000555ce4cd60a0 CR3: 0000000045942000 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:console_emit_next_record.constprop.0+0x4c8/0x800
Code: 83 e2 07 38 d0 7f 08 84 c0 0f 85 d5 02 00 00 88 5d 00 e8 db 3e 00 00 31 ff 4c 89 f6 e8 41 32 19 00 4d 85 f6 0f 85 76 01 00 00 43 35 19 00 48 b8 00 00 00 00 00 fc ff df 48 03 04 24 48 c7 00
RSP: 0018:ffff88804605f7b0 EFLAGS: 00000202
RAX: 000000000004ae2f RBX: 0000000000000000 RCX: ffffffff8128648f
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffff88804605f958 R08: 0000000000000001 R09: ffffffff86a5d7c7
R10: fffffbfff0d4baf8 R11: 0000000000000001 R12: 0000000000000001
R13: ffffffff86da9ba0 R14: 0000000000000200 R15: ffffffff854a0138
console_unlock+0x36c/0x590
vprintk_emit+0x1b9/0x550
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: 306743
hardirqs last enabled at (306742): [] _raw_spin_unlock_irq+0x1f/0x40
hardirqs last disabled at (306743): [] _raw_spin_lock_irqsave+0x4e/0x50
softirqs last enabled at (306492): [] __irq_exit_rcu+0x113/0x170
softirqs last disabled at (306739): [] __irq_exit_rcu+0x113/0x170
---[ end trace 0000000000000000 ]---
kernfs_put: syz3/pids.events: released with incorrect active_ref 0
WARNING: CPU: 1 PID: 15640 at fs/kernfs/dir.c:531 kernfs_put.part.0+0x433/0x540
Modules linked in:
CPU: 1 PID: 15640 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:ffff88804605fbd8 EFLAGS: 00010286
RAX: 0000000000000000 RBX: dffffc0000000000 RCX: 0000000000000000
RDX: ffff888043305040 RSI: ffffffff812b68e8 RDI: ffffed1008c0bf6d
RBP: ffff88800ecca038 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000001 R12: ffff88800ecca000
R13: ffff88800ea8bbc8 R14: 0000000000000000 R15: ffff8880155a9d20
FS: 0000000000000000(0000) GS:ffff88806cf00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
loop6: detected capacity change from 0 to 256
CR2: 0000555ce4cd60a0 CR3: 0000000045942000 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: 307695
hardirqs last enabled at (307705): [] __up_console_sem+0x78/0x80
hardirqs last disabled at (307716): [] __up_console_sem+0x5d/0x80
softirqs last enabled at (306756): [] __irq_exit_rcu+0x113/0x170
softirqs last disabled at (306739): [] __irq_exit_rcu+0x113/0x170
---[ end trace 0000000000000000 ]---
==================================================================
------------[ cut here ]------------
BUG: KASAN: use-after-free in llist_del_first+0x89/0xa0
Read of size 8 at addr ffff88800ecca080 by task kworker/1:0/15640
WARNING: CPU: 0 PID: 18243 at fs/kernfs/dir.c:504 kernfs_get.part.0+0x69/0x80
CPU: 1 PID: 15640 Comm: kworker/1:0 Tainted: G W 5.19.0-rc4-next-20220630 #1
Modules linked in:
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
CPU: 0 PID: 18243 Comm: syz-executor.3 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
Call Trace:
RIP: 0010:kernfs_get.part.0+0x69/0x80
dump_stack_lvl+0x8b/0xb3
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
print_report.cold+0x5e/0x5e1
RSP: 0018:ffff88806ce09c80 EFLAGS: 00010046
kasan_report+0xbe/0x1c0
RAX: 0000000000000000 RBX: ffff88800ecca000 RCX: 0000000000000100
RDX: ffff8880428b5040 RSI: ffffffff819d50a9 RDI: 0000000000000005
llist_del_first+0x89/0xa0
RBP: 0000000000000000 R08: 0000000000000005 R09: 0000000000000000
kernfs_notify_workfn+0x78/0x560
R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000000001
R13: 1ffffffff0a01e40 R14: ffff88800ecca000 R15: ffff88800d7f5d30
FS: 000055555636e400(0000) GS:ffff88806ce00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
process_one_work+0xa17/0x1690
CR2: 00007fad8b239000 CR3: 0000000045942000 CR4: 0000000000350ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff4ff0 DR7: 0000000000000400
Call Trace:
worker_thread+0x637/0x1250
kernfs_get+0x1b/0x30
kthread+0x2f2/0x3b0
kernfs_notify+0x180/0x350
cgroup_file_notify+0xf5/0x1a0
ret_from_fork+0x22/0x30
call_timer_fn+0x17d/0x5f0
Allocated by task 298:
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
__run_timers.part.0+0x65e/0xa50
__kernfs_create_file+0x51/0x350
cgroup_addrm_files+0x3e2/0x9d0
css_populate_dir+0x19b/0x450
cgroup_apply_control_enable+0x3ae/0xa40
run_timer_softirq+0xae/0x1a0
cgroup_mkdir+0x824/0x11f0
__do_softirq+0x270/0x8c7
kernfs_iop_mkdir+0x149/0x1d0
__irq_exit_rcu+0x113/0x170
vfs_mkdir+0x417/0x6a0
irq_exit_rcu+0x5/0x20
do_mkdirat+0x17b/0x2e0
sysvec_apic_timer_interrupt+0x8e/0xc0
__x64_sys_mkdir+0xf2/0x140
do_syscall_64+0x3b/0x90
entry_SYSCALL_64_after_hwframe+0x46/0xb0
asm_sysvec_apic_timer_interrupt+0x1b/0x20
Freed by task 15640:
RIP: 0010:_raw_spin_unlock_irq+0x25/0x40
kasan_save_stack+0x1e/0x40
Code: 0f 1f 44 00 00 55 48 8b 74 24 08 48 89 fd 48 83 c7 18 e8 5e 0a 0e fd 48 89 ef e8 56 8b 0e fd e8 a1 20 30 fd fb bf 01 00 00 00 e6 79 04 fd 65 8b 05 1f 74 e7 7b 85 c0 74 02 5d c3 0f 1f 44 00
kasan_set_track+0x21/0x30
RSP: 0018:ffff888046a3fad0 EFLAGS: 00000202
kasan_set_free_info+0x20/0x30
____kasan_slab_free+0x14b/0x1a0
RAX: 00000000000026b9 RBX: 00000000000047ab RCX: ffffffff8128648f
kmem_cache_free+0xfb/0x600
RDX: 0000000000000000 RSI: 0000000000000002 RDI: 0000000000000001
kernfs_put.part.0+0x2c7/0x540
RBP: ffffffff8500a140 R08: 0000000000000001 R09: ffffffff86a5d7cf
kernfs_put+0x42/0x50
R10: fffffbfff0d4baf9 R11: 0000000000000001 R12: dffffc0000000000
kernfs_notify_workfn+0x417/0x560
R13: 0000000000000000 R14: 0000000000035280 R15: ffff88801b9925d0
process_one_work+0xa17/0x1690
worker_thread+0x637/0x1250
alloc_pid+0x30e/0xd80
kthread+0x2f2/0x3b0
ret_from_fork+0x22/0x30
copy_process+0x396b/0x6d60
The buggy address belongs to the object at ffff88800ecca000
which belongs to the cache kernfs_node_cache of size 168
The buggy address is located 128 bytes inside of
168-byte region [ffff88800ecca000, ffff88800ecca0a8)
The buggy address belongs to the physical page:
page:00000000c25d66e4 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xecca
flags: 0x100000000000200(slab|node=0|zone=1)
kernel_clone+0xe7/0xa60
raw: 0100000000000200 0000000000000000 dead000000000122 ffff8880080718c0
raw: 0000000000000000 0000000000110011 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected
Memory state around the buggy address:
ffff88800ecc9f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
ffff88800ecca000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
__do_sys_clone+0xba/0x100
>ffff88800ecca080: fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00
^
ffff88800ecca100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
ffff88800ecca180: 00 00 fc fc fc fc fc fc fc fc 00 00 00 00 00 00
do_syscall_64+0x3b/0x90
==================================================================
entry_SYSCALL_64_after_hwframe+0x46/0xb0
RIP: 0033:0x7f227115bf41
Code: 48 85 ff 74 3d 48 85 f6 74 38 48 83 ee 10 48 89 4e 08 48 89 3e 48 89 d7 4c 89 c2 4d 89 c8 4c 8b 54 24 08 b8 38 00 00 00 0f 05 <48> 85 c0 7c 13 74 01 c3 31 ed 58 5f ff d0 48 89 c7 b8 3c 00 00 00
RSP: 002b:00007ffded63f028 EFLAGS: 00000206 ORIG_RAX: 0000000000000038
RAX: ffffffffffffffda RBX: 00007f226e6af700 RCX: 00007f227115bf41
RDX: 00007f226e6af9d0 RSI: 00007f226e6af2f0 RDI: 00000000003d0f00
RBP: 00007ffded63f260 R08: 00007f226e6af700 R09: 00007f226e6af700
R10: 00007f226e6af9d0 R11: 0000000000000206 R12: 00007ffded63f0de
R13: 00007ffded63f0df R14: 00007f226e6af300 R15: 000055555636fd50
irq event stamp: 9919
hardirqs last enabled at (9918): [] _raw_spin_unlock_irq+0x1f/0x40
hardirqs last disabled at (9919): [] _raw_spin_lock_irqsave+0x4e/0x50
softirqs last enabled at (9902): [] fpu_clone+0x3be/0xb00
softirqs last disabled at (9915): [] __irq_exit_rcu+0x113/0x170
---[ end trace 0000000000000000 ]---
FAT-fs (loop6): Invalid FSINFO signature: 0x00000000, 0x00000000 (sector = 1)
loop5: detected capacity change from 0 to 264192
----------------
Code disassembly (best guess):
0: 83 e2 07 and $0x7,%edx
3: 38 d0 cmp %dl,%al
5: 7f 08 jg 0xf
7: 84 c0 test %al,%al
9: 0f 85 d5 02 00 00 jne 0x2e4
f: 88 5d 00 mov %bl,0x0(%rbp)
12: e8 db 3e 00 00 callq 0x3ef2
17: 31 ff xor %edi,%edi
19: 4c 89 f6 mov %r14,%rsi
1c: e8 41 32 19 00 callq 0x193262
21: 4d 85 f6 test %r14,%r14
24: 0f 85 76 01 00 00 jne 0x1a0
* 2a: e8 43 35 19 00 callq 0x193572 <-- trapping instruction
2f: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax
36: fc ff df
39: 48 03 04 24 add (%rsp),%rax
3d: 48 rex.W
3e: c7 .byte 0xc7