INFO: task syz-executor:13692 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:21256 pid:13692 ppid:1 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5381 [inline]
__schedule+0x1553/0x45a0 kernel/sched/core.c:6700
schedule+0xbd/0x170 kernel/sched/core.c:6774
io_schedule+0x80/0xd0 kernel/sched/core.c:9023
folio_wait_bit_common+0x714/0xfa0 mm/filemap.c:1329
__filemap_get_folio+0xbc/0xbb0 mm/filemap.c:1910
truncate_inode_pages_range+0x46b/0xfb0 mm/truncate.c:401
evict+0x4dd/0x8d0 fs/inode.c:707
dispose_list fs/inode.c:738 [inline]
evict_inodes+0x606/0x6a0 fs/inode.c:792
generic_shutdown_super+0x97/0x2b0 fs/super.c:672
kill_block_super+0x44/0x90 fs/super.c:1660
deactivate_locked_super+0x97/0x100 fs/super.c:481
cleanup_mnt+0x43b/0x4d0 fs/namespace.c:1259
task_work_run+0x1d4/0x260 kernel/task_work.c:245
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:291 [inline]
syscall_exit_to_user_mode+0x1a/0x50 kernel/entry/common.c:302
do_syscall_64+0x61/0xa0 arch/x86/entry/common.c:82
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f508579d897
RSP: 002b:00007ffc22e52b38 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 00007f5085831ef0 RCX: 00007f508579d897
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffc22e52bf0
RBP: 00007ffc22e52bf0 R08: 00007ffc22e53bf0 R09: 00000000ffffffff
R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffc22e53c80
R13: 00007f5085831ef0 R14: 000000000011b714 R15: 00007ffc22e53cc0
Showing all locks held in the system:
1 lock held by rcu_tasks_trace/15:
#0: ffffffff8d132cd0 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0xadb/0xdb0 kernel/rcu/tasks.h:607
1 lock held by khungtaskd/29:
#0: ffffffff8d131fa0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:334 [inline]
#0: ffffffff8d131fa0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:786 [inline]
#0: ffffffff8d131fa0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x290 kernel/locking/lockdep.c:6633
2 locks held by getty/5530:
#0: ffff88803191a0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
#1: ffffc9000326e2f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x433/0x1390 drivers/tty/n_tty.c:2217
1 lock held by syz-executor/13692:
#0: ffff88802d2d60e0 (&type->s_umount_key#106){++++}-{3:3}, at: __super_lock fs/super.c:56 [inline]
#0: ffff88802d2d60e0 (&type->s_umount_key#106){++++}-{3:3}, at: __super_lock_excl fs/super.c:71 [inline]
#0: ffff88802d2d60e0 (&type->s_umount_key#106){++++}-{3:3}, at: deactivate_super+0xa4/0xe0 fs/super.c:513
1 lock held by syz.3.2072/15587:
#0: ffff88802d2d60e0 (&type->s_umount_key#106){++++}-{3:3}, at: __super_lock fs/super.c:58 [inline]
#0: ffff88802d2d60e0 (&type->s_umount_key#106){++++}-{3:3}, at: super_lock+0x17f/0x3a0 fs/super.c:117
1 lock held by syz.8.2708/18116:
#0: ffff8880b8f3c018 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2a/0x140 kernel/sched/core.c:559
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 29 Comm: khungtaskd Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
Call Trace:
dump_stack_lvl+0x18c/0x250 lib/dump_stack.c:106
nmi_cpu_backtrace+0x3a6/0x3e0 lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0x17a/0x2f0 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:160 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:222 [inline]
watchdog+0xf3d/0xf80 kernel/hung_task.c:379
kthread+0x2fa/0x390 kernel/kthread.c:388
ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:152
ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:293
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 62 Comm: kworker/u4:5 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
Workqueue: events_unbound nsim_dev_trap_report_work
RIP: 0010:in_aton+0x3b9/0x430 net/core/utils.c:71
Code: 06 f9 eb 19 e8 d8 1f 06 f9 eb 0c e8 d1 1f 06 f9 eb 05 e8 ca 1f 06 f9 41 09 dd 44 89 eb 0f cb 89 d8 48 83 c4 18 5b 41 5c 41 5d <41> 5e 41 5f 5d c3 44 89 f1 80 e1 07 38 c1 0f 8c 6a fc ff ff 4c 89
RSP: 0018:ffffc900015d7ab0 EFLAGS: 00000282
RAX: 00000000016433c6 RBX: 000000000000000e RCX: ffff88801daf3c00
RDX: 0000000000000000 RSI: ffffffff8e3c2890 RDI: 0000000000000000
RBP: 0000000000000000 R08: ffff88801daf3c00 R09: 0000000000000003
R10: 000000000000002e R11: 0000000000000000 R12: dffffc0000000000
R13: ffff88802feef140 R14: ffffffff8b68f86d R15: ffffffff8b68f86d
FS: 0000000000000000(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fa87465c000 CR3: 000000003cd6e000 CR4: 00000000003506e0
Call Trace:
nsim_dev_trap_skb_build drivers/net/netdevsim/dev.c:764 [inline]
nsim_dev_trap_report drivers/net/netdevsim/dev.c:805 [inline]
nsim_dev_trap_report_work+0x4ca/0xb00 drivers/net/netdevsim/dev.c:851
process_one_work kernel/workqueue.c:2634 [inline]
process_scheduled_works+0xa5d/0x15d0 kernel/workqueue.c:2711
worker_thread+0xa55/0xfc0 kernel/workqueue.c:2792
kthread+0x2fa/0x390 kernel/kthread.c:388
ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:152
ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:293