INFO: task kworker/1:3:4064 blocked for more than 144 seconds.
Not tainted 6.1.143-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/1:3 state:D stack:23912 pid:4064 ppid:2 flags:0x00004000
Workqueue: events_long flush_old_commits
Call Trace:
context_switch kernel/sched/core.c:5244 [inline]
__schedule+0x10e9/0x40d0 kernel/sched/core.c:6561
schedule+0xb9/0x180 kernel/sched/core.c:6637
schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6696
__mutex_lock_common kernel/locking/mutex.c:679 [inline]
__mutex_lock+0x555/0xaf0 kernel/locking/mutex.c:747
reiserfs_write_lock+0x75/0xd0 fs/reiserfs/lock.c:27
reiserfs_sync_fs fs/reiserfs/super.c:76 [inline]
flush_old_commits+0x1de/0x2f0 fs/reiserfs/super.c:111
process_one_work+0x898/0x1160 kernel/workqueue.c:2292
worker_thread+0xaa2/0x1250 kernel/workqueue.c:2439
kthread+0x29d/0x330 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
INFO: task syz.6.1506:11934 blocked for more than 144 seconds.
Not tainted 6.1.143-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.6.1506 state:D stack:22976 pid:11934 ppid:6481 flags:0x00004006
Call Trace:
context_switch kernel/sched/core.c:5244 [inline]
__schedule+0x10e9/0x40d0 kernel/sched/core.c:6561
schedule+0xb9/0x180 kernel/sched/core.c:6637
schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6696
__mutex_lock_common kernel/locking/mutex.c:679 [inline]
__mutex_lock+0x555/0xaf0 kernel/locking/mutex.c:747
reiserfs_write_lock_nested+0x5c/0xd0 fs/reiserfs/lock.c:78
reiserfs_cond_resched fs/reiserfs/reiserfs.h:849 [inline]
search_by_key+0x9ee/0x45e0 fs/reiserfs/stree.c:712
reiserfs_update_sd_size+0x1eb/0xe30 fs/reiserfs/inode.c:1455
reiserfs_update_sd fs/reiserfs/reiserfs.h:3099 [inline]
reiserfs_do_truncate+0xe5a/0x13e0 fs/reiserfs/stree.c:2036
reiserfs_truncate_file+0x376/0x7c0 fs/reiserfs/inode.c:2310
reiserfs_file_release+0x8e0/0xa50 fs/reiserfs/file.c:109
__fput+0x22c/0x920 fs/file_table.c:320
task_work_run+0x1ca/0x250 kernel/task_work.c:203
get_signal+0x11a6/0x1350 kernel/signal.c:2648
arch_do_signal_or_restart+0xb0/0x1230 arch/x86/kernel/signal.c:871
exit_to_user_mode_loop+0x70/0x110 kernel/entry/common.c:174
exit_to_user_mode_prepare+0xb1/0x140 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: 0033:0x7f401918e929
RSP: 002b:00007f4019f62038 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: 0000000000000012 RBX: 00007f40193b6160 RCX: 00007f401918e929
RDX: 0000000000000012 RSI: 00002000000002c0 RDI: 0000000000000009
RBP: 00007f4019210b39 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f40193b6160 R15: 00007ffc7d0aff58
INFO: task syz.6.1506:11935 blocked for more than 144 seconds.
Not tainted 6.1.143-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.6.1506 state:D stack:26384 pid:11935 ppid:6481 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5244 [inline]
__schedule+0x10e9/0x40d0 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
__filemap_get_folio+0x406/0xdd0 mm/filemap.c:1959
pagecache_get_page+0x26/0x250 mm/folio-compat.c:110
find_or_create_page include/linux/pagemap.h:646 [inline]
grab_cache_page include/linux/pagemap.h:778 [inline]
convert_tail_for_hole fs/reiserfs/inode.c:592 [inline]
reiserfs_get_block+0x2c91/0x3ef0 fs/reiserfs/inode.c:921
__block_write_begin_int+0x54b/0x1a70 fs/buffer.c:1991
reiserfs_write_begin+0x206/0x4c0 fs/reiserfs/inode.c:2775
generic_cont_expand_simple+0x136/0x1f0 fs/buffer.c:2347
reiserfs_setattr+0x639/0x1240 fs/reiserfs/inode.c:3305
notify_change+0xc74/0xf40 fs/attr.c:499
do_truncate+0x197/0x220 fs/open.c:65
vfs_truncate+0x262/0x2f0 fs/open.c:111
do_sys_truncate+0xdc/0x190 fs/open.c:134
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: 0033:0x7f401918e929
RSP: 002b:00007f4019f41038 EFLAGS: 00000246 ORIG_RAX: 000000000000004c
RAX: ffffffffffffffda RBX: 00007f40193b6240 RCX: 00007f401918e929
RDX: 0000000000000000 RSI: 00000000003a6000 RDI: 0000200000000080
RBP: 00007f4019210b39 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000001 R14: 00007f40193b6240 R15: 00007ffc7d0aff58
Showing all locks held in the system:
1 lock held by rcu_tasks_kthre/12:
#0: ffffffff8cb2b430 (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: ffffffff8cb2bc50 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x33/0xf00 kernel/rcu/tasks.h:517
3 locks held by kworker/1:1/26:
#0: ffff888017471938 ((wq_completion)events_power_efficient){+.+.}-{0:0}, at: process_one_work+0x7a1/0x1160 kernel/workqueue.c:2267
#1: ffffc90000a2fd00 ((reg_check_chans).work){+.+.}-{0:0}, at: process_one_work+0x7a1/0x1160 kernel/workqueue.c:2267
#2: ffffffff8dd419a8 (rtnl_mutex){+.+.}-{3:3}, at: reg_check_chans_work+0x8b/0xd80 net/wireless/reg.c:2499
1 lock held by khungtaskd/28:
#0: ffffffff8cb2aaa0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:350 [inline]
#0: ffffffff8cb2aaa0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:791 [inline]
#0: ffffffff8cb2aaa0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x51/0x290 kernel/locking/lockdep.c:6513
2 locks held by getty/4028:
#0: ffff88807e140098 (&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
4 locks held by kworker/1:3/4064:
#0: ffff888017471138 ((wq_completion)events_long){+.+.}-{0:0}, at: process_one_work+0x7a1/0x1160 kernel/workqueue.c:2267
#1: ffffc90003897d00 ((work_completion)(&(&sbi->old_work)->work)){+.+.}-{0:0}, at: process_one_work+0x7a1/0x1160 kernel/workqueue.c:2267
#2: ffff888026b800e0 (&type->s_umount_key#69){++++}-{3:3}, at: flush_old_commits+0xc8/0x2f0 fs/reiserfs/super.c:97
#3: ffff888077558090 (&sbi->lock){+.+.}-{3:3}, at: reiserfs_write_lock+0x75/0xd0 fs/reiserfs/lock.c:27
3 locks held by kworker/0:4/4331:
#0: ffff888017470938 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x7a1/0x1160 kernel/workqueue.c:2267
#1: ffffc900047f7d00 (deferred_process_work){+.+.}-{0:0}, at: process_one_work+0x7a1/0x1160 kernel/workqueue.c:2267
#2: ffffffff8dd419a8 (rtnl_mutex){+.+.}-{3:3}, at: switchdev_deferred_process_work+0xa/0x20 net/switchdev/switchdev.c:104
5 locks held by kworker/u4:8/4387:
2 locks held by kworker/u4:11/4398:
2 locks held by kworker/u4:18/4977:
2 locks held by syz.6.1506/11934:
#0: ffff88805477dd78 (&ei->tailpack){+.+.}-{3:3}, at: reiserfs_file_release+0xbf/0xa50 fs/reiserfs/file.c:41
#1: ffff888077558090 (&sbi->lock){+.+.}-{3:3}, at: reiserfs_write_lock_nested+0x5c/0xd0 fs/reiserfs/lock.c:78
3 locks held by syz.6.1506/11935:
#0: ffff888026b80460 (sb_writers#19){.+.+}-{0:0}, at: mnt_want_write+0x3d/0x90 fs/namespace.c:393
#1: ffff88805477dfa0 (&sb->s_type->i_mutex_key#24){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline]
#1: ffff88805477dfa0 (&sb->s_type->i_mutex_key#24){+.+.}-{3:3}, at: do_truncate+0x183/0x220 fs/open.c:63
#2: ffff888077558090 (&sbi->lock){+.+.}-{3:3}, at: reiserfs_write_lock_nested+0x5c/0xd0 fs/reiserfs/lock.c:78
3 locks held by kworker/u4:20/13130:
#0: ffff888017479138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work+0x7a1/0x1160 kernel/workqueue.c:2267
#1: ffffc90003c37d00 ((linkwatch_work).work){+.+.}-{0:0}, at: process_one_work+0x7a1/0x1160 kernel/workqueue.c:2267
#2: ffffffff8dd419a8 (rtnl_mutex){+.+.}-{3:3}, at: linkwatch_event+0xa/0x50 net/core/link_watch.c:263
5 locks held by syz.7.1797/13518:
1 lock held by syz.9.1798/13530:
2 locks held by rm/13527:
1 lock held by syz.0.1800/13537:
#0: ffffffff8dd419a8 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:74 [inline]
#0: ffffffff8dd419a8 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x740/0xed0 net/core/rtnetlink.c:6150
3 locks held by syz.0.1800/13538:
1 lock held by syz.1.1801/13535:
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 28 Comm: khungtaskd Not tainted 6.1.143-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
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: 13538 Comm: syz.0.1800 Not tainted 6.1.143-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
RIP: 0010:check_wait_context kernel/locking/lockdep.c:4739 [inline]
RIP: 0010:__lock_acquire+0x718/0x7c50 kernel/locking/lockdep.c:4999
Code: 5c c5 00 48 89 d8 48 c1 e8 03 42 0f b6 04 00 84 c0 75 45 8b 1b 48 8b 44 24 50 42 0f b6 04 00 84 c0 75 55 48 8b 44 24 18 33 18 <41> ff ce 49 ff cf f7 c3 00 60 00 00 74 a8 e9 22 01 00 00 48 c7 c7
RSP: 0018:ffffc90007f5f6e0 EFLAGS: 00000002
RAX: ffff88802e9f8b50 RBX: 00000000000107dc RCX: ffff88802e9f8000
RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffffff90ae12a8
RBP: ffffc90007f5f930 R08: dffffc0000000000 R09: fffffbfff215c256
R10: fffffbfff215c256 R11: 1ffffffff215c255 R12: 0000000000000000
R13: ffff88802e9f8b00 R14: 0000000000000002 R15: 0000000000000000
FS: 00007ff395e236c0(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f8764033a10 CR3: 000000006282d000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
lock_acquire+0x1b4/0x490 kernel/locking/lockdep.c:5662
__raw_spin_lock include/linux/spinlock_api_smp.h:133 [inline]
_raw_spin_lock+0x2a/0x40 kernel/locking/spinlock.c:154
__mutex_lock_common kernel/locking/mutex.c:617 [inline]
__mutex_lock+0x270/0xaf0 kernel/locking/mutex.c:747
tty_write_lock+0x56/0x80 drivers/tty/tty_io.c:947
set_termios+0x460/0x6a0 drivers/tty/tty_ioctl.c:509
tty_mode_ioctl+0x4b4/0x620 drivers/tty/tty_ioctl.c:-1
tty_ioctl+0x87c/0xba0 drivers/tty/tty_io.c:2785
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:870 [inline]
__se_sys_ioctl+0xfa/0x170 fs/ioctl.c:856
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: 0033:0x7ff394f8e929
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ff395e23038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007ff3951b6240 RCX: 00007ff394f8e929
RDX: 0000200000000000 RSI: 0000000000005404 RDI: 0000000000000007
RBP: 00007ff395010b39 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007ff3951b6240 R15: 00007ffd96613198