warning: checkpointing journal with EXT4_IOC_CHECKPOINT_FLAG_ZEROOUT can be slow
------------[ cut here ]------------
kernfs_put: syz4/pids.events: released with incorrect active_ref 0
WARNING: CPU: 1 PID: 32 at fs/kernfs/dir.c:531 kernfs_put.part.0+0x433/0x540
Modules linked in:
CPU: 1 PID: 32 Comm: kworker/1:1 Not tainted 5.19.0-rc5-next-20220706 #1
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.14.0-0-g155821a1990b-prebuilt.qemu.org 04/01/2014
------------[ cut here ]------------
WARNING: CPU: 1 PID: 32 at fs/kernfs/dir.c:504 kernfs_get.part.0+0x69/0x80
Modules linked in:
CPU: 1 PID: 32 Comm: kworker/1:1 Not tainted 5.19.0-rc5-next-20220706 #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 a8 fd a6 ff 85 ed 74 18 e8 cf 00 a7 ff be 04 00 00 00 48 89 df e8 d2 ba d9 ff f0 ff 03 5b 5d c3 e8 b7 00 a7 ff <0f> 0b eb df 48 89 df e8 7b b7 d9 ff eb c6 66 0f 1f 84 00 00 00 00
RSP: 0018:ffff88806cf09c80 EFLAGS: 00010046
RAX: 0000000000000000 RBX: ffff888018238740 RCX: 0000000000000100
RDX: ffff888008ec0000 RSI: ffffffff819df849 RDI: 0000000000000005
RBP: 0000000000000000 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000000001
R13: 1ffffffff0a01e40 R14: ffff888018238740 R15: ffff8880187f8130
FS: 0000000000000000(0000) GS:ffff88806cf00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f4da6ed29c8 CR3: 00000000175aa000 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+0x1c8/0x8cc
__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 61 61 19 00 4d 85 f6 0f 85 76 01 00 00 63 64 19 00 48 b8 00 00 00 00 00 fc ff df 48 03 04 24 48 c7 00
RSP: 0018:ffff888008ecf6d8 EFLAGS: 00000206
RAX: 00000000000d4e21 RBX: 0000000000000000 RCX: ffffffff8128d13f
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffff888008ecf880 R08: 0000000000000001 R09: ffffffff86a607c7
R10: fffffbfff0d4c0f8 R11: 0000000000000001 R12: 0000000000000001
R13: ffffffff86dacba0 R14: 0000000000000200 R15: ffffffff854a01b8
console_unlock+0x36c/0x590
vprintk_emit+0x1b9/0x550
vprintk+0x80/0x90
_printk+0xba/0xed
dump_stack_print_info.cold+0x1b/0x20
show_regs+0x10/0x40
__warn+0xe2/0x190
report_bug+0x1bc/0x210
handle_bug+0x3c/0x60
exc_invalid_op+0x14/0x40
asm_exc_invalid_op+0x1b/0x20
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 53 fc a6 ff 48 8b 14 24 44 89 f1 4c 89 fe 48 c7 c7 e0 5b 72 84 e8 13 aa 6c 02 <0f> 0b e9 b9 fc ff ff 48 89 ef e8 0e b3 d9 ff e9 c1 fd ff ff e8 04
RSP: 0018:ffff888008ecfbd8 EFLAGS: 00010286
RAX: 0000000000000000 RBX: dffffc0000000000 RCX: 0000000000000000
RDX: ffff888008ec0000 RSI: ffffffff812bd348 RDI: ffffed10011d9f6d
RBP: ffff888018238778 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000001 R12: ffff888018238740
R13: ffff88800e5023a0 R14: 0000000000000000 R15: ffff88800d84a488
kernfs_put+0x42/0x50
kernfs_notify_workfn+0x417/0x560
process_one_work+0xa0f/0x1690
worker_thread+0x637/0x1250
kthread+0x2ed/0x3a0
ret_from_fork+0x22/0x30
irq event stamp: 871975
hardirqs last enabled at (871974): [] _raw_spin_unlock_irq+0x1f/0x40
hardirqs last disabled at (871975): [] _raw_spin_lock_irqsave+0x4e/0x50
softirqs last enabled at (871928): [] __irq_exit_rcu+0x113/0x170
softirqs last disabled at (871971): [] __irq_exit_rcu+0x113/0x170
---[ end trace 0000000000000000 ]---
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 53 fc a6 ff 48 8b 14 24 44 89 f1 4c 89 fe 48 c7 c7 e0 5b 72 84 e8 13 aa 6c 02 <0f> 0b e9 b9 fc ff ff 48 89 ef e8 0e b3 d9 ff e9 c1 fd ff ff e8 04
RSP: 0018:ffff888008ecfbd8 EFLAGS: 00010286
RAX: 0000000000000000 RBX: dffffc0000000000 RCX: 0000000000000000
RDX: ffff888008ec0000 RSI: ffffffff812bd348 RDI: ffffed10011d9f6d
RBP: ffff888018238778 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000001 R12: ffff888018238740
R13: ffff88800e5023a0 R14: 0000000000000000 R15: ffff88800d84a488
FS: 0000000000000000(0000) GS:ffff88806cf00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f4da6ed29c8 CR3: 00000000175aa000 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+0xa0f/0x1690
worker_thread+0x637/0x1250
kthread+0x2ed/0x3a0
ret_from_fork+0x22/0x30
irq event stamp: 872903
hardirqs last enabled at (872915): [] __up_console_sem+0x78/0x80
hardirqs last disabled at (872926): [] __up_console_sem+0x5d/0x80
softirqs last enabled at (871988): [] __irq_exit_rcu+0x113/0x170
softirqs last disabled at (871971): [] __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 ffff8880182387c0 by task kworker/1:1/32
WARNING: CPU: 0 PID: 5702 at fs/kernfs/dir.c:504 kernfs_get.part.0+0x69/0x80
CPU: 1 PID: 32 Comm: kworker/1:1 Tainted: G W 5.19.0-rc5-next-20220706 #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: 5702 Comm: syz-executor.7 Tainted: G W 5.19.0-rc5-next-20220706 #1
Call Trace:
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.14.0-0-g155821a1990b-prebuilt.qemu.org 04/01/2014
RIP: 0010:kernfs_get.part.0+0x69/0x80
dump_stack_lvl+0x8b/0xb3
Code: 31 ff 89 ee e8 a8 fd a6 ff 85 ed 74 18 e8 cf 00 a7 ff be 04 00 00 00 48 89 df e8 d2 ba d9 ff f0 ff 03 5b 5d c3 e8 b7 00 a7 ff <0f> 0b eb df 48 89 df e8 7b b7 d9 ff eb c6 66 0f 1f 84 00 00 00 00
print_report.cold+0x5e/0x5e1
RSP: 0018:ffff88806ce09c80 EFLAGS: 00010046
kasan_report+0xb1/0x1b0
RAX: 0000000000000000 RBX: ffff888018238740 RCX: 0000000000000100
RDX: ffff8880202d0000 RSI: ffffffff819df849 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: ffff888018238740 R15: ffff8880187f8130
FS: 0000000000000000(0000) GS:ffff88806ce00000(0000) knlGS:0000000000000000
process_one_work+0xa0f/0x1690
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2da22000 CR3: 000000001829e000 CR4: 0000000000350ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff4ff0 DR7: 0000000000000400
worker_thread+0x637/0x1250
Call Trace:
kthread+0x2ed/0x3a0
kernfs_get+0x1b/0x30
kernfs_notify+0x180/0x350
ret_from_fork+0x22/0x30
cgroup_file_notify+0xf5/0x1a0
Allocated by task 297:
call_timer_fn+0x17d/0x5f0
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+0x1c8/0x8cc
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 32:
RIP: 0010:unwind_next_frame+0xab7/0x20a0
kasan_save_stack+0x1e/0x40
Code: 46 68 00 00 00 00 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 0f b6 04 02 4c 89 e2 83 e2 07 38 d0 7f 08 84 c0 0f 85 92 10 00 00 <4c> 89 c8 4c 89 f9 41 c6 46 41 00 48 ba 00 00 00 00 00 fc ff df 48
kasan_set_track+0x21/0x30
RSP: 0018:ffff88804726f4f0 EFLAGS: 00000246
kasan_set_free_info+0x20/0x30
__kasan_slab_free+0x108/0x190
RAX: 0000000000000000 RBX: 0000000000000001 RCX: 1ffff11008e4deb9
kmem_cache_free+0xfb/0x600
RDX: 0000000000000001 RSI: ffff88804726fc18 RDI: ffff88804726f5d8
kernfs_put.part.0+0x2c7/0x540
RBP: ffff88804726f5c8 R08: ffffffff85c2207e R09: ffffffff85c22082
kernfs_put+0x42/0x50
R10: ffffed1008e4debb R11: ffff88804726f5b0 R12: ffff88804726f5b1
kernfs_notify_workfn+0x417/0x560
R13: ffff88804726f5d0 R14: ffff88804726f570 R15: ffffffff85c22083
process_one_work+0xa0f/0x1690
worker_thread+0x637/0x1250
kthread+0x2ed/0x3a0
ret_from_fork+0x22/0x30
arch_stack_walk+0x83/0xf0
The buggy address belongs to the object at ffff888018238740
which belongs to the cache kernfs_node_cache of size 168
The buggy address is located 128 bytes inside of
168-byte region [ffff888018238740, ffff8880182387e8)
The buggy address belongs to the physical page:
stack_trace_save+0x8c/0xc0
page:00000000c52ed43d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18238
flags: 0x100000000000200(slab|node=0|zone=1)
raw: 0100000000000200 0000000000000000 dead000000000122 ffff8880080358c0
kasan_save_stack+0x1e/0x40
raw: 0000000000000000 0000000000110011 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected
Memory state around the buggy address:
ffff888018238680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
ffff888018238700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb
>ffff888018238780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc
^
ffff888018238800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00
ffff888018238880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc
==================================================================
__kasan_record_aux_stack+0x97/0xa0
call_rcu+0x6a/0xa20
kmem_cache_free+0xc1/0x600
exit_mmap+0x24f/0x680
mmput+0xd1/0x390
do_exit+0xa01/0x27d0
do_group_exit+0xd2/0x2f0
get_signal+0x2201/0x24b0
arch_do_signal_or_restart+0x89/0x1be0
exit_to_user_mode_prepare+0x131/0x1a0
irqentry_exit_to_user_mode+0x5/0x30
exc_page_fault+0xc4/0x1a0
asm_exc_page_fault+0x27/0x30
RIP: 0033:0x0
Code: Unable to access opcode bytes at RIP 0xffffffffffffffd6.
RSP: 002b:0000000020000526 EFLAGS: 00010217
RAX: 0000000000000000 RBX: 00007f16a5c2bf60 RCX: 00007f16a5b18b19
RDX: 0000000000000000 RSI: 0000000000000058 RDI: 0000000020000680
RBP: 00007f16a5b72f6d R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fff35c10b1f R14: 00007f16a308e300 R15: 0000000000022000
irq event stamp: 1777
hardirqs last enabled at (1776): [] _raw_spin_unlock_irq+0x1f/0x40
hardirqs last disabled at (1777): [] _raw_spin_lock_irqsave+0x4e/0x50
softirqs last enabled at (1414): [] __irq_exit_rcu+0x113/0x170
softirqs last disabled at (1773): [] __irq_exit_rcu+0x113/0x170
---[ end trace 0000000000000000 ]---
----------------
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 61 61 19 00 callq 0x196182
21: 4d 85 f6 test %r14,%r14
24: 0f 85 76 01 00 00 jne 0x1a0
* 2a: e8 63 64 19 00 callq 0x196492 <-- 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