INFO: task syz-executor.1:21824 blocked for more than 143 seconds.
Not tainted 5.16.0-rc4-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.1 state:D stack:29568 pid:21824 ppid: 3638 flags:0x00000004
Call Trace:
context_switch kernel/sched/core.c:4972 [inline]
__schedule+0xa9a/0x4940 kernel/sched/core.c:6253
schedule+0xd2/0x260 kernel/sched/core.c:6326
rwsem_down_read_slowpath+0x589/0xa70 kernel/locking/rwsem.c:1041
__down_read_common kernel/locking/rwsem.c:1223 [inline]
__down_read kernel/locking/rwsem.c:1232 [inline]
down_read+0xe2/0x440 kernel/locking/rwsem.c:1472
inode_lock_shared include/linux/fs.h:793 [inline]
lookup_slow fs/namei.c:1673 [inline]
walk_component+0x400/0x6a0 fs/namei.c:1970
lookup_last fs/namei.c:2425 [inline]
path_lookupat+0x1bb/0x860 fs/namei.c:2449
filename_lookup+0x1c6/0x590 fs/namei.c:2478
user_path_at_empty+0x42/0x60 fs/namei.c:2801
user_path_at include/linux/namei.h:57 [inline]
do_mount fs/namespace.c:3328 [inline]
__do_sys_mount fs/namespace.c:3539 [inline]
__se_sys_mount fs/namespace.c:3516 [inline]
__x64_sys_mount+0x1ea/0x300 fs/namespace.c:3516
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7f4319f44e99
RSP: 002b:00007f4318878168 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f431a058100 RCX: 00007f4319f44e99
RDX: 0000000020000080 RSI: 0000000020000040 RDI: 0000000000000000
RBP: 00007f4319f9f031 R08: 0000000020000280 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fff644c08cf R14: 00007f4318878300 R15: 0000000000022000
Showing all locks held in the system:
1 lock held by khungtaskd/27:
#0: ffffffff8bb83d20 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6458
2 locks held by getty/3281:
#0: ffff888023456098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:252
#1: ffffc90002b962e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xcf0/0x1230 drivers/tty/n_tty.c:2113
3 locks held by kworker/u4:7/3735:
1 lock held by udevd/3858:
3 locks held by udevd/3873:
#0: ffff8880b9c39a98 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2b/0x120 kernel/sched/core.c:478
#1: ffff88802260ec30 (&type->i_mutex_dir_key#3/1){+.+.}-{3:3}, at: inode_lock_nested include/linux/fs.h:818 [inline]
#1: ffff88802260ec30 (&type->i_mutex_dir_key#3/1){+.+.}-{3:3}, at: lock_rename+0x225/0x280 fs/namei.c:2915
#2: ffff88807f5ec558 (&ep->lock){...-}-{2:2}, at: ep_poll_callback+0x75/0xf90 fs/eventpoll.c:1136
1 lock held by udevd/7509:
1 lock held by udevd/7521:
1 lock held by udevd/18501:
#0: ffff8880b9d39a98 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2b/0x120 kernel/sched/core.c:478
2 locks held by kworker/u4:26/20816:
#0: ffff8880b9d39a98 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2b/0x120 kernel/sched/core.c:478
#1: ffff8880b9d279c8 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: psi_task_switch+0x3a6/0x490 kernel/sched/psi.c:880
2 locks held by syz-executor.1/21820:
1 lock held by syz-executor.1/21824:
#0: ffff88803daa06e0 (&type->i_mutex_dir_key#9){++++}-{3:3}, at: inode_lock_shared include/linux/fs.h:793 [inline]
#0: ffff88803daa06e0 (&type->i_mutex_dir_key#9){++++}-{3:3}, at: lookup_slow fs/namei.c:1673 [inline]
#0: ffff88803daa06e0 (&type->i_mutex_dir_key#9){++++}-{3:3}, at: walk_component+0x400/0x6a0 fs/namei.c:1970
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 27 Comm: khungtaskd Not tainted 5.16.0-rc4-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106
nmi_cpu_backtrace.cold+0x47/0x144 lib/nmi_backtrace.c:111
nmi_trigger_cpumask_backtrace+0x1b3/0x230 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:210 [inline]
watchdog+0xc1d/0xf50 kernel/hung_task.c:295
kthread+0x405/0x4f0 kernel/kthread.c:327
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 7509 Comm: udevd Not tainted 5.16.0-rc4-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:preempt_count arch/x86/include/asm/preempt.h:27 [inline]
RIP: 0010:check_kcov_mode kernel/kcov.c:166 [inline]
RIP: 0010:__sanitizer_cov_trace_pc+0x0/0x60 kernel/kcov.c:200
Code: 48 89 ef 5d e9 31 22 46 00 5d be 03 00 00 00 e9 d6 33 63 02 66 0f 1f 44 00 00 48 8b be b0 01 00 00 e8 b4 ff ff ff 31 c0 c3 90 <65> 8b 05 b9 c4 8a 7e 89 c1 48 8b 34 24 81 e1 00 01 00 00 65 48 8b
RSP: 0018:ffffc900055475a0 EFLAGS: 00000246
RAX: 0000000000000000 RBX: 0000000000000009 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffff88807e11d700 RDI: 0000000000000003
RBP: ffff888018c79b80 R08: 0000000000000000 R09: 0000000000000009
R10: ffffffff83a33b57 R11: 0000000000000010 R12: 0000000000000002
R13: 00000000000000b1 R14: dffffc0000000000 R15: 0000000000000000
FS: 00007f0ba4e22840(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f43188ba9e0 CR3: 000000001c116000 CR4: 0000000000350ef0
Call Trace:
tomoyo_domain_quota_is_ok+0x31a/0x550 security/tomoyo/util.c:1092
tomoyo_supervisor+0x2f2/0xf00 security/tomoyo/common.c:2089
tomoyo_audit_path_log security/tomoyo/file.c:168 [inline]
tomoyo_path_permission security/tomoyo/file.c:587 [inline]
tomoyo_path_permission+0x270/0x3a0 security/tomoyo/file.c:573
tomoyo_check_open_permission+0x33e/0x380 security/tomoyo/file.c:777
tomoyo_file_open security/tomoyo/tomoyo.c:311 [inline]
tomoyo_file_open+0xa3/0xd0 security/tomoyo/tomoyo.c:306
security_file_open+0x45/0xb0 security/security.c:1635
do_dentry_open+0x353/0x1250 fs/open.c:809
do_open fs/namei.c:3426 [inline]
path_openat+0x1cad/0x2750 fs/namei.c:3559
do_filp_open+0x1aa/0x400 fs/namei.c:3586
do_sys_openat2+0x16d/0x4d0 fs/open.c:1212
do_sys_open fs/open.c:1228 [inline]
__do_sys_openat fs/open.c:1244 [inline]
__se_sys_openat fs/open.c:1239 [inline]
__x64_sys_openat+0x13f/0x1f0 fs/open.c:1239
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7f0ba4f79697
Code: 25 00 00 41 00 3d 00 00 41 00 74 37 64 8b 04 25 18 00 00 00 85 c0 75 5b 44 89 e2 48 89 ee bf 9c ff ff ff b8 01 01 00 00 0f 05 <48> 3d 00 f0 ff ff 0f 87 85 00 00 00 48 83 c4 68 5d 41 5c c3 0f 1f
RSP: 002b:00007ffe3e8edb00 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 000055b562af2810 RCX: 00007f0ba4f79697
RDX: 0000000000080000 RSI: 000055b562b12cc0 RDI: 00000000ffffff9c
RBP: 000055b562b12cc0 R08: 000055b562b12cc0 R09: 00007f0ba5049a60
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000080000
R13: 0000000000000701 R14: 0000000000000000 R15: 0000000000000000
----------------
Code disassembly (best guess):
0: 48 89 ef mov %rbp,%rdi
3: 5d pop %rbp
4: e9 31 22 46 00 jmpq 0x46223a
9: 5d pop %rbp
a: be 03 00 00 00 mov $0x3,%esi
f: e9 d6 33 63 02 jmpq 0x26333ea
14: 66 0f 1f 44 00 00 nopw 0x0(%rax,%rax,1)
1a: 48 8b be b0 01 00 00 mov 0x1b0(%rsi),%rdi
21: e8 b4 ff ff ff callq 0xffffffda
26: 31 c0 xor %eax,%eax
28: c3 retq
29: 90 nop
* 2a: 65 8b 05 b9 c4 8a 7e mov %gs:0x7e8ac4b9(%rip),%eax # 0x7e8ac4ea <-- trapping instruction
31: 89 c1 mov %eax,%ecx
33: 48 8b 34 24 mov (%rsp),%rsi
37: 81 e1 00 01 00 00 and $0x100,%ecx
3d: 65 gs
3e: 48 rex.W
3f: 8b .byte 0x8b