INFO: task syz.2.573:10022 blocked for more than 143 seconds.
Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.2.573 state:D stack:26688 pid:10022 tgid:10019 ppid:8588 task_flags:0x400040 flags:0x00080002
Call Trace:
context_switch kernel/sched/core.c:5295 [inline]
__schedule+0x14fb/0x52c0 kernel/sched/core.c:6907
__schedule_loop kernel/sched/core.c:6989 [inline]
rt_mutex_schedule+0x76/0xf0 kernel/sched/core.c:7285
rt_mutex_slowlock_block kernel/locking/rtmutex.c:1647 [inline]
__rt_mutex_slowlock kernel/locking/rtmutex.c:1721 [inline]
__rt_mutex_slowlock_locked+0x1f8f/0x25c0 kernel/locking/rtmutex.c:1760
__rwbase_read_lock+0xc3/0x180 kernel/locking/rwbase_rt.c:114
rwbase_read_lock kernel/locking/rwbase_rt.c:147 [inline]
__down_read kernel/locking/rwsem.c:1466 [inline]
down_read+0x132/0x200 kernel/locking/rwsem.c:1539
__super_lock fs/super.c:60 [inline]
super_lock+0x2d6/0x3d0 fs/super.c:122
__iterate_supers+0x126/0x290 fs/super.c:926
ksys_sync fs/sync.c:102 [inline]
__ia32_sys_sync+0xa0/0x120 fs/sync.c:111
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0x14d/0xf80 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f2ea1fec799
RSP: 002b:00007f2ea0246028 EFLAGS: 00000246 ORIG_RAX: 00000000000000a2
RAX: ffffffffffffffda RBX: 00007f2ea2265fa0 RCX: 00007f2ea1fec799
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00007f2ea2265fa0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f2ea2266038 R14: 00007f2ea2265fa0 R15: 00007ffd216dc8f8
Showing all locks held in the system:
1 lock held by khungtaskd/38:
#0: ffffffff8ddcd780 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:312 [inline]
#0: ffffffff8ddcd780 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:850 [inline]
#0: ffffffff8ddcd780 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180 kernel/locking/lockdep.c:6775
1 lock held by udevd/5162:
2 locks held by getty/5552:
#0: ffff888028c480a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
#1: ffffc90003e8b2e0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x462/0x13c0 drivers/tty/n_tty.c:2211
2 locks held by syz-executor/5793:
2 locks held by syz-executor/5796:
1 lock held by udevd/5975:
1 lock held by udevd/8663:
4 locks held by udevd/9432:
1 lock held by syz.2.573/10022:
#0: ffff888037dae0d0 (&type->s_umount_key#53){++++}-{4:4}, at: __super_lock fs/super.c:60 [inline]
#0: ffff888037dae0d0 (&type->s_umount_key#53){++++}-{4:4}, at: super_lock+0x2d6/0x3d0 fs/super.c:122
3 locks held by syz.9.795/11479:
1 lock held by syz.5.798/11487:
#0: ffffffff8de224d8 (kauditd_wait.lock){+.+.}-{3:3}, at: spin_lock include/linux/spinlock_rt.h:45 [inline]
#0: ffffffff8de224d8 (kauditd_wait.lock){+.+.}-{3:3}, at: __wake_up_common_lock+0x2f/0x1e0 kernel/sched/wait.c:124
1 lock held by iou-sqp-11487/11502:
2 locks held by syz.4.799/11497:
3 locks held by syz.6.797/11499:
1 lock held by dhcpcd-run-hook/11500:
#0: ffffffff8de224d8 (kauditd_wait.lock){+.+.}-{3:3}, at: spin_lock include/linux/spinlock_rt.h:45 [inline]
#0: ffffffff8de224d8 (kauditd_wait.lock){+.+.}-{3:3}, at: __wake_up_common_lock+0x2f/0x1e0 kernel/sched/wait.c:124
2 locks held by syz.3.800/11503:
=============================================
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 38 Comm: khungtaskd Not tainted syzkaller #0 PREEMPT_{RT,(full)}
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
Call Trace:
dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120
nmi_cpu_backtrace+0x274/0x2d0 lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0x17a/0x300 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:161 [inline]
__sys_info lib/sys_info.c:157 [inline]
sys_info+0x135/0x170 lib/sys_info.c:165
check_hung_uninterruptible_tasks kernel/hung_task.c:346 [inline]
watchdog+0xfd9/0x1030 kernel/hung_task.c:515
kthread+0x388/0x470 kernel/kthread.c:467
ret_from_fork+0x51e/0xb90 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 9432 Comm: udevd Not tainted syzkaller #0 PREEMPT_{RT,(full)}
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
RIP: 0010:preempt_count arch/x86/include/asm/preempt.h:27 [inline]
RIP: 0010:check_kcov_mode kernel/kcov.c:183 [inline]
RIP: 0010:write_comp_data kernel/kcov.c:246 [inline]
RIP: 0010:__sanitizer_cov_trace_const_cmp8+0x10/0xa0 kernel/kcov.c:321
Code: c3 cc cc cc cc cc 0f 1f 40 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 48 8b 04 24 65 48 8b 0d 68 a7 89 10 <65> 44 8b 05 88 a7 89 10 41 81 e0 00 00 ff 00 ba 00 01 00 00 23 91
RSP: 0018:ffffc90004157218 EFLAGS: 00000283
RAX: ffffffff8b1e0def RBX: 0000000000000037 RCX: ffff88802e0a1e40
RDX: 0000000000000000 RSI: 0000000000000002 RDI: 0000000000000018
RBP: ffffc90004157340 R08: 0000000000000000 R09: 0000000000000000
R10: ffffc900041572a0 R11: fffff5200082ae57 R12: ffff88806132901d
R13: dffffc0000000000 R14: ffff88806132901d R15: 0000000000000002
FS: 00007ff8fba7c880(0000) GS:ffff888126340000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ff8fb12c000 CR3: 00000000544a4000 CR4: 00000000003526f0
Call Trace:
number+0xbbf/0xf80 lib/vsprintf.c:573
vsnprintf+0x8e5/0xee0 lib/vsprintf.c:2912
audit_log_vformat+0x355/0x9a0 kernel/audit.c:2025
audit_log_format+0xe8/0x150 kernel/audit.c:2059
audit_log_start+0x803/0xa40 kernel/audit.c:1968
common_lsm_audit+0xb9/0x300 security/lsm_audit.c:442
smack_log+0x39a/0x3f0 security/smack/smack_access.c:391
smk_tskacc+0x311/0x3a0 security/smack/smack_access.c:255
smack_inode_permission+0x2ae/0x360 security/smack/smack_lsm.c:1251
security_inode_permission+0xf4/0x2e0 security/security.c:1816
lookup_inode_permission_may_exec fs/namei.c:693 [inline]
may_lookup fs/namei.c:1958 [inline]
link_path_walk+0x2ed/0x18d0 fs/namei.c:2595
path_parentat fs/namei.c:2851 [inline]
__filename_parentat+0x27f/0x6f0 fs/namei.c:2875
filename_parentat fs/namei.c:2893 [inline]
filename_renameat2+0x22d/0x9c0 fs/namei.c:6090
__do_sys_rename fs/namei.c:6188 [inline]
__se_sys_rename+0x55/0x2c0 fs/namei.c:6184
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0x14d/0xf80 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7ff8fbb3dcc7
Code: e8 5e a7 09 00 f7 d8 19 c0 5b c3 0f 1f 84 00 00 00 00 00 b8 ff ff ff ff 5b c3 66 0f 1f 84 00 00 00 00 00 b8 52 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 01 c3 48 8b 15 01 61 17 00 f7 d8 64 89 02 b8
RSP: 002b:00007fff87bbd6d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000052
RAX: ffffffffffffffda RBX: 000055abcd725b30 RCX: 00007ff8fbb3dcc7
RDX: 000055abcd700010 RSI: 00007fff87bbd6f0 RDI: 00007fff87bbdaf0
RBP: 000055abcd723b70 R08: 00000000000001e0 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000206 R12: 00007fff87bbd6f0
R13: 00007fff87bbdaf0 R14: 0000000000000000 R15: 000055aba40cc9dd