INFO: task syz-executor:4264 blocked for more than 143 seconds.
Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor state:D stack:22080 pid:4264 ppid:1 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5244 [inline]
__schedule+0x10ec/0x40b0 kernel/sched/core.c:6561
schedule+0xb9/0x180 kernel/sched/core.c:6637
io_schedule+0x7c/0xd0 kernel/sched/core.c:8797
folio_wait_bit_common+0x6e1/0xf60 mm/filemap.c:1324
truncate_inode_pages_range+0x9a2/0xff0 mm/truncate.c:422
evict+0x498/0x870 fs/inode.c:707
dispose_list fs/inode.c:738 [inline]
evict_inodes+0x604/0x690 fs/inode.c:792
generic_shutdown_super+0x93/0x340 fs/super.c:480
kill_block_super+0x7c/0xe0 fs/super.c:1470
deactivate_locked_super+0x93/0xf0 fs/super.c:332
cleanup_mnt+0x463/0x4f0 fs/namespace.c:1191
task_work_run+0x1ca/0x250 kernel/task_work.c:203
resume_user_mode_work include/linux/resume_user_mode.h:49 [inline]
exit_to_user_mode_loop+0xe6/0x110 kernel/entry/common.c:177
exit_to_user_mode_prepare+0xee/0x180 kernel/entry/common.c:210
__syscall_exit_to_user_mode_work kernel/entry/common.c:292 [inline]
syscall_exit_to_user_mode+0x16/0x40 kernel/entry/common.c:303
do_syscall_64+0x58/0xa0 arch/x86/entry/common.c:87
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f69181909f7
RSP: 002b:00007ffc3bbde328 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 00007f6918211d7d RCX: 00007f69181909f7
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffc3bbde3e0
RBP: 00007ffc3bbde3e0 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000000246 R12: 00007ffc3bbdf470
R13: 00007f6918211d7d R14: 000000000006d8dd R15: 00007ffc3bbdf4b0
INFO: task syz-executor:4265 blocked for more than 143 seconds.
Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor state:D stack:22144 pid:4265 ppid:1 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5244 [inline]
__schedule+0x10ec/0x40b0 kernel/sched/core.c:6561
schedule+0xb9/0x180 kernel/sched/core.c:6637
io_schedule+0x7c/0xd0 kernel/sched/core.c:8797
folio_wait_bit_common+0x6e1/0xf60 mm/filemap.c:1324
truncate_inode_pages_range+0x9a2/0xff0 mm/truncate.c:422
evict+0x498/0x870 fs/inode.c:707
dispose_list fs/inode.c:738 [inline]
evict_inodes+0x604/0x690 fs/inode.c:792
generic_shutdown_super+0x93/0x340 fs/super.c:480
kill_block_super+0x7c/0xe0 fs/super.c:1470
deactivate_locked_super+0x93/0xf0 fs/super.c:332
cleanup_mnt+0x463/0x4f0 fs/namespace.c:1191
task_work_run+0x1ca/0x250 kernel/task_work.c:203
resume_user_mode_work include/linux/resume_user_mode.h:49 [inline]
exit_to_user_mode_loop+0xe6/0x110 kernel/entry/common.c:177
exit_to_user_mode_prepare+0xee/0x180 kernel/entry/common.c:210
__syscall_exit_to_user_mode_work kernel/entry/common.c:292 [inline]
syscall_exit_to_user_mode+0x16/0x40 kernel/entry/common.c:303
do_syscall_64+0x58/0xa0 arch/x86/entry/common.c:87
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f04079909f7
RSP: 002b:00007ffd61f4a968 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 00007f0407a11d7d RCX: 00007f04079909f7
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffd61f4aa20
RBP: 00007ffd61f4aa20 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000000246 R12: 00007ffd61f4bab0
R13: 00007f0407a11d7d R14: 000000000006f476 R15: 00007ffd61f4baf0
Showing all locks held in the system:
1 lock held by rcu_tasks_kthre/12:
#0: ffffffff8cb2b630 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x33/0xf00 kernel/rcu/tasks.h:517
1 lock held by rcu_tasks_trace/13:
#0: ffffffff8cb2be50 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x33/0xf00 kernel/rcu/tasks.h:517
1 lock held by khungtaskd/27:
#0: ffffffff8cb2aca0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:350 [inline]
#0: ffffffff8cb2aca0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:791 [inline]
#0: ffffffff8cb2aca0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x51/0x290 kernel/locking/lockdep.c:6513
1 lock held by klogd/3626:
#0: ffff8880b8f3aad8 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x26/0x140 kernel/sched/core.c:537
2 locks held by getty/4026:
#0: ffff88814cd53098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x21/0x70 drivers/tty/tty_ldisc.c:244
#1: ffffc9000327b2f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x41b/0x1380 drivers/tty/n_tty.c:2198
1 lock held by syz-executor/4264:
#0: ffff88801e3be0e0 (&type->s_umount_key#92){+.+.}-{3:3}, at: deactivate_super+0xa0/0xd0 fs/super.c:362
1 lock held by syz-executor/4265:
#0: ffff88807d17e0e0 (&type->s_umount_key#92){+.+.}-{3:3}, at: deactivate_super+0xa0/0xd0 fs/super.c:362
2 locks held by syz.4.5649/17214:
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 27 Comm: khungtaskd Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025
Call Trace:
dump_stack_lvl+0x168/0x22e lib/dump_stack.c:106
nmi_cpu_backtrace+0x3f4/0x470 lib/nmi_backtrace.c:111
nmi_trigger_cpumask_backtrace+0x1d4/0x450 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:148 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:220 [inline]
watchdog+0xeee/0xf30 kernel/hung_task.c:377
kthread+0x29d/0x330 kernel/kthread.c:376
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: 4253 Comm: syz-executor Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025
RIP: 0010:check_preemption_disabled+0x18/0x110 lib/smp_processor_id.c:14
Code: cc cc 48 c7 c7 00 f7 de 8a 48 c7 c6 40 f7 de 8a eb 00 55 41 57 41 56 53 48 83 ec 10 65 48 8b 04 25 28 00 00 00 48 89 44 24 08 <65> 8b 05 d1 32 ea 75 65 8b 0d 72 88 ea 75 f7 c1 ff ff ff 7f 74 1f
RSP: 0018:ffffc90003c67820 EFLAGS: 00000082
RAX: dc0edcaf17aa3500 RBX: ffff88802e81d940 RCX: 0000000000000001
RDX: 0000000000000009 RSI: ffffffff8a8c1700 RDI: ffffffff8adef760
RBP: 0000000000000001 R08: dffffc0000000000 R09: fffffbfff1c3ed56
R10: fffffbfff1c3ed56 R11: 1ffffffff1c3ed55 R12: 0000000000000000
R13: 0000000000000046 R14: ffff8880b8e3aad8 R15: ffff88802e81e420
FS: 0000555581b6d500(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fcc6d9b3ad8 CR3: 000000007a8ed000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
lockdep_recursion_finish kernel/locking/lockdep.c:467 [inline]
lock_is_held_type+0x100/0x190 kernel/locking/lockdep.c:5706
lock_is_held include/linux/lockdep.h:283 [inline]
lockdep_assert_rq_held kernel/sched/sched.h:1346 [inline]
rq_clock_task kernel/sched/sched.h:1501 [inline]
update_curr+0xdb/0x950 kernel/sched/fair.c:885
dequeue_entity+0x87/0x1250 kernel/sched/fair.c:4855
dequeue_task_fair+0x1a2/0x1060 kernel/sched/fair.c:6198
deactivate_task kernel/sched/core.c:2096 [inline]
__schedule+0x513/0x40b0 kernel/sched/core.c:6514
schedule+0xb9/0x180 kernel/sched/core.c:6637
do_nanosleep+0x1a9/0x5f0 kernel/time/hrtimer.c:2088
hrtimer_nanosleep+0x15b/0x340 kernel/time/hrtimer.c:2136
__do_sys_clock_nanosleep kernel/time/posix-timers.c:1314 [inline]
__se_sys_clock_nanosleep+0x2e6/0x370 kernel/time/posix-timers.c:1291
do_syscall_x64 arch/x86/entry/common.c:51 [inline]
do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:81
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7fe0fbfc1f43
Code: 1f 84 00 00 00 00 00 83 ff 03 74 7b 83 ff 02 b8 fa ff ff ff 49 89 ca 0f 44 f8 80 3d 1e 66 1f 00 00 74 14 b8 e6 00 00 00 0f 05 d8 c3 66 2e 0f 1f 84 00 00 00 00 00 48 83 ec 28 48 89 54 24 10
RSP: 002b:00007ffd08ab34b8 EFLAGS: 00000202 ORIG_RAX: 00000000000000e6
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fe0fbfc1f43
RDX: 00007ffd08ab34d0 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: 000000000000025b R09: 0033c24b2e69c77a
R10: 0000000000000000 R11: 0000000000000202 R12: 00007ffd08ab3920
R13: 0000000000000004 R14: 00007ffd08ab350c R15: 00007ffd08ab35a0