INFO: task syz.1.1814:13220 blocked for more than 143 seconds.
Not tainted 6.16.0-syzkaller-11129-geacf91b0c78a #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.1.1814 state:D stack:29112 pid:13220 tgid:13206 ppid:5841 task_flags:0x400040 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5357 [inline]
__schedule+0x1190/0x5de0 kernel/sched/core.c:6961
__schedule_loop kernel/sched/core.c:7043 [inline]
schedule+0xe7/0x3a0 kernel/sched/core.c:7058
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:7115
__mutex_lock_common kernel/locking/mutex.c:676 [inline]
__mutex_lock+0x82a/0x10b0 kernel/locking/mutex.c:760
blk_trace_remove+0x1f/0x40 kernel/trace/blktrace.c:406
sg_ioctl_common drivers/scsi/sg.c:1122 [inline]
sg_ioctl+0x9c9/0x2880 drivers/scsi/sg.c:1156
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:598 [inline]
__se_sys_ioctl fs/ioctl.c:584 [inline]
__x64_sys_ioctl+0x18b/0x210 fs/ioctl.c:584
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xcd/0x4c0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f630ef8eb69
RSP: 002b:00007f630c56e038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f630f1b6320 RCX: 00007f630ef8eb69
RDX: 0000000020000000 RSI: 0000000000001276 RDI: 0000000000000006
RBP: 00007f630f011df1 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000001 R14: 00007f630f1b6320 R15: 00007ffc9f475d78
Showing all locks held in the system:
7 locks held by kworker/1:0/24:
1 lock held by khungtaskd/31:
#0: ffffffff8e5c1120 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:331 [inline]
#0: ffffffff8e5c1120 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:841 [inline]
#0: ffffffff8e5c1120 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x36/0x1c0 kernel/locking/lockdep.c:6775
2 locks held by kworker/u8:6/1326:
#0: ffff88801b881148 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work+0x12a2/0x1b70 kernel/workqueue.c:3211
#1: ffff8880b8524088 (per_cpu_ptr(&psi_seq, cpu)){-.-.}-{0:0}, at: psi_sched_switch kernel/sched/stats.h:220 [inline]
#1: ffff8880b8524088 (per_cpu_ptr(&psi_seq, cpu)){-.-.}-{0:0}, at: __schedule+0x1861/0x5de0 kernel/sched/core.c:6955
2 locks held by getty/5606:
#0: ffff888035f5c0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x24/0x80 drivers/tty/tty_ldisc.c:243
#1: ffffc9000332b2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x41b/0x14f0 drivers/tty/n_tty.c:2222
4 locks held by udevd/5852:
#0: ffff8881f101e790 (&p->lock){+.+.}-{4:4}, at: seq_read_iter+0xe1/0x12c0 fs/seq_file.c:182
#1: ffff888056180c88 (&of->mutex#2){+.+.}-{4:4}, at: kernfs_seq_start+0x4d/0x240 fs/kernfs/file.c:154
#2: ffff88821a00b788 (kn->active#19){++++}-{0:0}, at: kernfs_seq_start+0x71/0x240 fs/kernfs/file.c:155
#3: ffff8880572bd198 (&dev->mutex){....}-{4:4}, at: device_lock_interruptible include/linux/device.h:916 [inline]
#3: ffff8880572bd198 (&dev->mutex){....}-{4:4}, at: manufacturer_show+0x26/0xa0 drivers/usb/core/sysfs.c:142
2 locks held by syz.1.1814/13219:
1 lock held by syz.1.1814/13220:
#0: ffff888143326178 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_trace_remove+0x1f/0x40 kernel/trace/blktrace.c:406
2 locks held by kworker/u8:25/14165:
#0: ffff8880b843a318 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested kernel/sched/core.c:644 [inline]
#0: ffff8880b843a318 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x7e/0x130 kernel/sched/core.c:629
#1: ffff8880b8424088 (per_cpu_ptr(&psi_seq, cpu)){-.-.}-{0:0}, at: psi_sched_switch kernel/sched/stats.h:220 [inline]
#1: ffff8880b8424088 (per_cpu_ptr(&psi_seq, cpu)){-.-.}-{0:0}, at: __schedule+0x1861/0x5de0 kernel/sched/core.c:6955
=============================================
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 31 Comm: khungtaskd Not tainted 6.16.0-syzkaller-11129-geacf91b0c78a #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
Call Trace:
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:120
nmi_cpu_backtrace+0x27b/0x390 lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0x29c/0x300 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:160 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:307 [inline]
watchdog+0xf0e/0x1260 kernel/hung_task.c:470
kthread+0x3c5/0x780 kernel/kthread.c:464
ret_from_fork+0x5d7/0x6f0 arch/x86/kernel/process.c:148
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 1326 Comm: kworker/u8:6 Not tainted 6.16.0-syzkaller-11129-geacf91b0c78a #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
Workqueue: events_unbound toggle_allocation_gate
RIP: 0010:get_current arch/x86/include/asm/current.h:25 [inline]
RIP: 0010:__sanitizer_cov_trace_pc+0x8/0x70 kernel/kcov.c:216
Code: e9 0d 40 5b 00 be 03 00 00 00 5b e9 82 f1 26 03 66 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 48 8b 34 24 <65> 48 8b 15 88 f7 19 12 65 8b 05 99 f7 19 12 a9 00 01 ff 00 74 1d
RSP: 0018:ffffc9000480f8c0 EFLAGS: 00000212
RAX: dffffc0000000000 RBX: ffffc9000480f9d8 RCX: 1ffff92000901f47
RDX: dffffc0000000000 RSI: ffffffff8b91d9da RDI: ffffc9000480fa38
RBP: 0000000000000001 R08: 0000000000000001 R09: 0000000000000004
R10: 0000000000000004 R11: 0000000000000000 R12: ffffc9000480fa04
R13: ffffffff8ba6860d R14: ffffc9000480f9f8 R15: ffffffff8ba6860e
FS: 0000000000000000(0000) GS:ffff8881247c8000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000555561bf25c8 CR3: 000000000e380000 CR4: 00000000003526f0
Call Trace:
insn_get_sib arch/x86/lib/insn.c:458 [inline]
insn_get_displacement+0x7ba/0x980 arch/x86/lib/insn.c:490
insn_get_immediate+0x84/0x1e00 arch/x86/lib/insn.c:656
insn_get_length arch/x86/lib/insn.c:728 [inline]
insn_decode+0x21d/0x320 arch/x86/lib/insn.c:767
__smp_text_poke_batch_add+0x168/0x7a0 arch/x86/kernel/alternative.c:2984
arch_jump_label_transform_queue+0xaf/0x120 arch/x86/kernel/jump_label.c:138
__jump_label_update+0x125/0x420 kernel/jump_label.c:513
jump_label_update+0x376/0x550 kernel/jump_label.c:919
static_key_disable_cpuslocked+0x158/0x1c0 kernel/jump_label.c:240
static_key_disable+0x1a/0x20 kernel/jump_label.c:248
toggle_allocation_gate mm/kfence/core.c:855 [inline]
toggle_allocation_gate+0x145/0x280 mm/kfence/core.c:842
process_one_work+0x9cc/0x1b70 kernel/workqueue.c:3236
process_scheduled_works kernel/workqueue.c:3319 [inline]
worker_thread+0x6c8/0xf10 kernel/workqueue.c:3400
kthread+0x3c5/0x780 kernel/kthread.c:464
ret_from_fork+0x5d7/0x6f0 arch/x86/kernel/process.c:148
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245