kernfs_put: syz2/memory.events.local: released with incorrect active_ref 0
WARNING: CPU: 1 PID: 51 at fs/kernfs/dir.c:531 kernfs_put.part.0+0x433/0x540
Modules linked in:
CPU: 1 PID: 51 Comm: kworker/1:2 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_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:ffff8880089f7bd8 EFLAGS: 00010286
------------[ cut here ]------------
WARNING: CPU: 1 PID: 51 at fs/kernfs/dir.c:504 kernfs_get.part.0+0x69/0x80
Modules linked in:
CPU: 1 PID: 51 Comm: kworker/1:2 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: ffff88800cc06000 RCX: 0000000000000100
RDX: ffff8880089f8000 RSI: ffffffff819df849 RDI: 0000000000000005
RBP: 0000000000000000 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000000001
R13: 1ffffffff0a01e40 R14: ffff88800cc06000 R15: ffff8880447944f0
FS: 0000000000000000(0000) GS:ffff88806cf00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007faca86a0000 CR3: 000000000d87e000 CR4: 0000000000350ee0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff4ff0 DR7: 0000000000000400
Call Trace:
<IRQ>
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
</IRQ>
<TASK>
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 <e8> 63 64 19 00 48 b8 00 00 00 00 00 fc ff df 48 03 04 24 48 c7 00
RSP: 0018:ffff8880089f76b0 EFLAGS: 00000206
RAX: 000000000002cddb RBX: 0000000000000000 RCX: ffffffff8128d13f
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffff8880089f7858 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
__show_regs.cold+0xc/0x481
show_regs+0x2f/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:ffff8880089f7bd8 EFLAGS: 00010286
RAX: 0000000000000000 RBX: dffffc0000000000 RCX: 0000000000000000
RDX: ffff8880089f8000 RSI: ffffffff812bd348 RDI: ffffed100113ef6d
RBP: ffff88800cc06038 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000001 R12: ffff88800cc06000
R13: ffff88800ec07658 R14: 0000000000000000 R15: ffff88801564a9b0
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
</TASK>
irq event stamp: 183781
hardirqs last enabled at (183780): [<ffffffff841c1d1f>] _raw_spin_unlock_irq+0x1f/0x40
hardirqs last disabled at (183781): [<ffffffff841c1b4e>] _raw_spin_lock_irqsave+0x4e/0x50
softirqs last enabled at (183754): [<ffffffff81168a63>] __irq_exit_rcu+0x113/0x170
softirqs last disabled at (183773): [<ffffffff81168a63>] __irq_exit_rcu+0x113/0x170
---[ end trace 0000000000000000 ]---
RAX: 0000000000000000 RBX: dffffc0000000000 RCX: 0000000000000000
RDX: ffff8880089f8000 RSI: ffffffff812bd348 RDI: ffffed100113ef6d
RBP: ffff88800cc06038 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000001 R12: ffff88800cc06000
R13: ffff88800ec07658 R14: 0000000000000000 R15: ffff88801564a9b0
FS: 0000000000000000(0000) GS:ffff88806cf00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007faca86a0000 CR3: 000000000d87e000 CR4: 0000000000350ee0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff4ff0 DR7: 0000000000000400
Call Trace:
<TASK>
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
</TASK>
irq event stamp: 185247
hardirqs last enabled at (185259): [<ffffffff812b62a8>] __up_console_sem+0x78/0x80
hardirqs last disabled at (185268): [<ffffffff812b628d>] __up_console_sem+0x5d/0x80
softirqs last enabled at (184914): [<ffffffff81168a63>] __irq_exit_rcu+0x113/0x170
softirqs last disabled at (184813): [<ffffffff81168a63>] __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 ffff88800cc06080 by task kworker/1:2/51
CPU: 1 PID: 51 Comm: kworker/1:2 Tainted: G W 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
Call Trace:
<TASK>
dump_stack_lvl+0x8b/0xb3
print_report.cold+0x5e/0x5e1
kasan_report+0xb1/0x1b0
llist_del_first+0x89/0xa0
kernfs_notify_workfn+0x78/0x560
process_one_work+0xa0f/0x1690
worker_thread+0x637/0x1250
kthread+0x2ed/0x3a0
ret_from_fork+0x22/0x30
</TASK>
Allocated by task 294:
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 51:
kasan_save_stack+0x1e/0x40
kasan_set_track+0x21/0x30
kasan_set_free_info+0x20/0x30
__kasan_slab_free+0x108/0x190
kmem_cache_free+0xfb/0x600
kernfs_put.part.0+0x2c7/0x540
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
The buggy address belongs to the object at ffff88800cc06000
which belongs to the cache kernfs_node_cache of size 168
The buggy address is located 128 bytes inside of
168-byte region [ffff88800cc06000, ffff88800cc060a8)
The buggy address belongs to the physical page:
page:00000000fedc7cb9 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xcc06
flags: 0x100000000000200(slab|node=0|zone=1)
raw: 0100000000000200 0000000000000000 dead000000000122 ffff8880080358c0
raw: 0000000000000000 0000000000110011 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected
Memory state around the buggy address:
ffff88800cc05f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
ffff88800cc06000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff88800cc06080: fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00
^
ffff88800cc06100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
ffff88800cc06180: 00 00 fc fc fc fc fc fc fc fc 00 00 00 00 00 00
==================================================================
blktrace: Concurrent blktraces are not allowed on sg0
blktrace: Concurrent blktraces are not allowed on sg0
general protection fault, probably for non-canonical address 0x3ff93de03fbdf08: 0000 [#1] PREEMPT SMP KASAN NOPTI
CPU: 0 PID: 8280 Comm: systemd-udevd Tainted: G B W 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
RIP: 0010:qlist_free_all+0xaf/0x190
Code: 80 4c 01 c2 0f 82 f0 00 00 00 48 c7 c0 00 00 00 80 48 2b 05 c3 76 7b 03 48 01 d0 48 c1 e8 0c 48 c1 e0 06 48 03 05 a1 76 7b 03 <48> 8b 48 08 48 89 c2 f6 c1 01 0f 85 b6 00 00 00 0f 1f 44 00 00 48
RSP: 0018:ffff88804640faa0 EFLAGS: 00010207
RAX: 03ff93de03fbdf00 RBX: ffea0000fef7c0ff RCX: 000000000013000f
RDX: ffea00017ef7c0ff RSI: ffffea0000603240 RDI: 0000000040000000
RBP: 0000000000000000 R08: ffea0000fef7c0ff R09: 000000000013000f
R10: ffffea0000603240 R11: 0000000000000000 R12: dffffc0000000000
R13: ffff88804640fae0 R14: 0000000000000000 R15: ffff8880180c9e7f
FS: 00007fe4eaa648c0(0000) GS:ffff88806ce00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000c011b32f50 CR3: 000000000f6e2000 CR4: 0000000000350ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff4ff0 DR7: 0000000000000400
Call Trace:
<TASK>
kasan_quarantine_reduce+0x180/0x200
__kasan_slab_alloc+0x78/0x80
kmem_cache_alloc+0x1b1/0x490
mas_alloc_nodes+0x36e/0x6a0
mas_preallocate+0xff/0x2d0
do_mas_align_munmap.constprop.0+0x111/0xff0
do_mas_munmap+0x1e8/0x2b0
__vm_munmap+0x14c/0x280
__x64_sys_munmap+0x55/0x80
do_syscall_64+0x3b/0x90
entry_SYSCALL_64_after_hwframe+0x46/0xb0
RIP: 0033:0x7fe4eaf1dbf7
Code: 38 eb 85 48 8b 15 99 52 0c 00 f7 d8 64 89 02 48 c7 c0 ff ff ff ff eb 85 66 2e 0f 1f 84 00 00 00 00 00 90 b8 0b 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d 69 52 0c 00 f7 d8 64 89 01 48
RSP: 002b:00007ffca02a74e8 EFLAGS: 00000206 ORIG_RAX: 000000000000000b
RAX: ffffffffffffffda RBX: 000055f155b54b58 RCX: 00007fe4eaf1dbf7
RDX: 00000000ffffffff RSI: 0000000000a38e0a RDI: 00007fe4e96ef000
RBP: 000055f158004520 R08: 018342a5e22fa2d7 R09: 847306e072881c30
R10: 58d8df3bda4eea2f R11: 0000000000000206 R12: 000055f15803e0f0
R13: 000055f1580297d0 R14: 00007ffca02a75c0 R15: 000055f158032aa0
</TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:qlist_free_all+0xaf/0x190
Code: 80 4c 01 c2 0f 82 f0 00 00 00 48 c7 c0 00 00 00 80 48 2b 05 c3 76 7b 03 48 01 d0 48 c1 e8 0c 48 c1 e0 06 48 03 05 a1 76 7b 03 <48> 8b 48 08 48 89 c2 f6 c1 01 0f 85 b6 00 00 00 0f 1f 44 00 00 48
RSP: 0018:ffff88804640faa0 EFLAGS: 00010207
RAX: 03ff93de03fbdf00 RBX: ffea0000fef7c0ff RCX: 000000000013000f
RDX: ffea00017ef7c0ff RSI: ffffea0000603240 RDI: 0000000040000000
RBP: 0000000000000000 R08: ffea0000fef7c0ff R09: 000000000013000f
R10: ffffea0000603240 R11: 0000000000000000 R12: dffffc0000000000
R13: ffff88804640fae0 R14: 0000000000000000 R15: ffff8880180c9e7f
FS: 00007fe4eaa648c0(0000) GS:ffff88806ce00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000c011b32f50 CR3: 000000000f6e2000 CR4: 0000000000350ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff4ff0 DR7: 0000000000000400
----------------
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