INFO: task kworker/0:2:1139 blocked for more than 143 seconds. Not tainted 6.6.0-syzkaller-15859-g89cdf9d55601 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/0:2 state:D stack:20968 pid:1139 tgid:1139 ppid:2 flags:0x00004000 Workqueue: events_long flush_old_commits Call Trace: context_switch kernel/sched/core.c:5376 [inline] __schedule+0x1960/0x4a80 kernel/sched/core.c:6688 __schedule_loop kernel/sched/core.c:6763 [inline] schedule+0x149/0x260 kernel/sched/core.c:6778 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:6835 __mutex_lock_common kernel/locking/mutex.c:679 [inline] __mutex_lock+0x6a3/0xd60 kernel/locking/mutex.c:747 reiserfs_write_lock+0x7a/0xd0 fs/reiserfs/lock.c:27 reiserfs_sync_fs fs/reiserfs/super.c:76 [inline] flush_old_commits+0x1e3/0x2f0 fs/reiserfs/super.c:111 process_one_work kernel/workqueue.c:2630 [inline] process_scheduled_works+0x90f/0x1400 kernel/workqueue.c:2703 worker_thread+0xa5f/0xff0 kernel/workqueue.c:2784 kthread+0x2d3/0x370 kernel/kthread.c:388 ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:242 INFO: task kworker/1:6:5069 blocked for more than 145 seconds. Not tainted 6.6.0-syzkaller-15859-g89cdf9d55601 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/1:6 state:D stack:23992 pid:5069 tgid:5069 ppid:2 flags:0x00004000 Workqueue: events_long flush_old_commits Call Trace: context_switch kernel/sched/core.c:5376 [inline] __schedule+0x1960/0x4a80 kernel/sched/core.c:6688 __schedule_loop kernel/sched/core.c:6763 [inline] schedule+0x149/0x260 kernel/sched/core.c:6778 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:6835 __mutex_lock_common kernel/locking/mutex.c:679 [inline] __mutex_lock+0x6a3/0xd60 kernel/locking/mutex.c:747 reiserfs_write_lock+0x7a/0xd0 fs/reiserfs/lock.c:27 reiserfs_sync_fs fs/reiserfs/super.c:76 [inline] flush_old_commits+0x1e3/0x2f0 fs/reiserfs/super.c:111 process_one_work kernel/workqueue.c:2630 [inline] process_scheduled_works+0x90f/0x1400 kernel/workqueue.c:2703 worker_thread+0xa5f/0xff0 kernel/workqueue.c:2784 kthread+0x2d3/0x370 kernel/kthread.c:388 ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:242 Showing all locks held in the system: 3 locks held by kworker/0:1/9: #0: ffff888012c70d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:2605 [inline] #0: ffff888012c70d38 ((wq_completion)events){+.+.}-{0:0}, at: process_scheduled_works+0x825/0x1400 kernel/workqueue.c:2703 #1: ffffc900000e7d20 ((linkwatch_work).work){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:2605 [inline] ((linkwatch_work).work){+.+.}-{0:0}, at: process_scheduled_works+0x825/0x1400 kernel/workqueue.c:2703 #2: ffffffff8eb36bc8 (rtnl_mutex){+.+.}-{3:3}, at: linkwatch_event+0xe/0x60 net/core/link_watch.c:277 1 lock held by khungtaskd/29: #0: ffffffff8d92d0a0 (rcu_read_lock ){....}-{1:2} , at: rcu_lock_acquire include/linux/rcupdate.h:301 [inline] , at: rcu_read_lock include/linux/rcupdate.h:747 [inline] , at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6613 3 locks held by kworker/u4:4/58: 4 locks held by kworker/1:2/780: #0: ffff888012c71538 ((wq_completion)events_long){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:2605 [inline] #0: ffff888012c71538 ((wq_completion)events_long){+.+.}-{0:0}, at: process_scheduled_works+0x825/0x1400 kernel/workqueue.c:2703 #1: ffffc900045dfd20 ((work_completion)(&(&sbi->old_work)->work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:2605 [inline] #1: ffffc900045dfd20 ((work_completion)(&(&sbi->old_work)->work)){+.+.}-{0:0}, at: process_scheduled_works+0x825/0x1400 kernel/workqueue.c:2703 #2: ffff8880280940e0 (&type->s_umount_key #24 ){++++}-{3:3} , at: flush_old_commits+0xcb/0x2f0 fs/reiserfs/super.c:97 #3: ffff888071406090 ( &sbi->lock){+.+.}-{3:3}, at: reiserfs_write_lock+0x7a/0xd0 fs/reiserfs/lock.c:27 4 locks held by kworker/0:2/1139: #0: ffff888012c71538 ((wq_completion)events_long){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:2605 [inline] #0: ffff888012c71538 ((wq_completion)events_long){+.+.}-{0:0}, at: process_scheduled_works+0x825/0x1400 kernel/workqueue.c:2703 #1: ffffc90005657d20 ((work_completion)(&(&sbi->old_work)->work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:2605 [inline] ((work_completion)(&(&sbi->old_work)->work)){+.+.}-{0:0}, at: process_scheduled_works+0x825/0x1400 kernel/workqueue.c:2703 #2: ffff888074cd40e0 ( &type->s_umount_key #24 ){++++}-{3:3} , at: flush_old_commits+0xcb/0x2f0 fs/reiserfs/super.c:97 #3: ffff888028c17090 (&sbi->lock){+.+.}-{3:3}, at: reiserfs_write_lock+0x7a/0xd0 fs/reiserfs/lock.c:27 1 lock held by dhcpcd/4724: #0: ffffffff8eb36bc8 (rtnl_mutex){+.+.}-{3:3}, at: devinet_ioctl+0x2ce/0x1bc0 net/ipv4/devinet.c:1091 2 locks held by getty/4809: #0: ffff88802a82a0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243 #1: ffffc900015b72f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6b4/0x1e10 drivers/tty/n_tty.c:2201 4 locks held by kworker/1:6/5069: #0: ffff888012c71538 ( (wq_completion)events_long ){+.+.}-{0:0} , at: process_one_work kernel/workqueue.c:2605 [inline] , at: process_scheduled_works+0x825/0x1400 kernel/workqueue.c:2703 #1: ffffc9000457fd20 ( (work_completion)(&(&sbi->old_work)->work) ){+.+.}-{0:0} , at: process_one_work kernel/workqueue.c:2605 [inline] , at: process_scheduled_works+0x825/0x1400 kernel/workqueue.c:2703 #2: ffff888076e220e0 (&type->s_umount_key#24){++++}-{3:3}, at: flush_old_commits+0xcb/0x2f0 fs/reiserfs/super.c:97 #3: ffff888018ba9090 (&sbi->lock){+.+.}-{3:3}, at: reiserfs_write_lock+0x7a/0xd0 fs/reiserfs/lock.c:27 4 locks held by kworker/1:7/5522: #0: ffff888012c71538 ( (wq_completion)events_long){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:2605 [inline] (wq_completion)events_long){+.+.}-{0:0}, at: process_scheduled_works+0x825/0x1400 kernel/workqueue.c:2703 #1: ffffc900060ffd20 ((work_completion)(&(&sbi->old_work)->work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:2605 [inline] #1: ffffc900060ffd20 ((work_completion)(&(&sbi->old_work)->work)){+.+.}-{0:0}, at: process_scheduled_works+0x825/0x1400 kernel/workqueue.c:2703 #2: ffff88807eeb80e0 (&type->s_umount_key#24){++++}-{3:3}, at: flush_old_commits+0xcb/0x2f0 fs/reiserfs/super.c:97 #3: ffff888027b0e090 (&sbi->lock){+.+.}-{3:3}, at: reiserfs_write_lock+0x7a/0xd0 fs/reiserfs/lock.c:27 4 locks held by kworker/0:5/5525: #0: ffff888012c71538 ((wq_completion)events_long){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:2605 [inline] #0: ffff888012c71538 ((wq_completion)events_long){+.+.}-{0:0}, at: process_scheduled_works+0x825/0x1400 kernel/workqueue.c:2703 #1: ffffc900060dfd20 ((work_completion)(&(&sbi->old_work)->work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:2605 [inline] #1: ffffc900060dfd20 ((work_completion)(&(&sbi->old_work)->work)){+.+.}-{0:0}, at: process_scheduled_works+0x825/0x1400 kernel/workqueue.c:2703 #2: ffff8880717ca0e0 (&type->s_umount_key#24){++++}-{3:3}, at: flush_old_commits+0xcb/0x2f0 fs/reiserfs/super.c:97 #3: ffff888071715090 (&sbi->lock){+.+.}-{3:3}, at: reiserfs_write_lock+0x7a/0xd0 fs/reiserfs/lock.c:27 4 locks held by kworker/1:9/5562: #0: ffff888012c71538 ((wq_completion)events_long){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:2605 [inline] #0: ffff888012c71538 ((wq_completion)events_long){+.+.}-{0:0}, at: process_scheduled_works+0x825/0x1400 kernel/workqueue.c:2703 #1: ffffc9000612fd20 ((work_completion)(&(&sbi->old_work)->work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:2605 [inline] #1: ffffc9000612fd20 ((work_completion)(&(&sbi->old_work)->work)){+.+.}-{0:0}, at: process_scheduled_works+0x825/0x1400 kernel/workqueue.c:2703 #2: ffff88807f0100e0 (&type->s_umount_key#24){++++}-{3:3}, at: flush_old_commits+0xcb/0x2f0 fs/reiserfs/super.c:97 #3: ffff88806ea1d090 (&sbi->lock){+.+.}-{3:3}, at: reiserfs_write_lock+0x7a/0xd0 fs/reiserfs/lock.c:27 4 locks held by syz-executor.1/5599: 5 locks held by syz-executor.2/5609: 4 locks held by syz-executor.4/5640: 4 locks held by syz-executor.5/5672: 4 locks held by syz-executor.3/5679: 4 locks held by syz-executor.0/5682: 3 locks held by kworker/0:8/5958: #0: ffff888012c70d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:2605 [inline] #0: ffff888012c70d38 ((wq_completion)events){+.+.}-{0:0}, at: process_scheduled_works+0x825/0x1400 kernel/workqueue.c:2703 #1: ffffc9000af87d20 (deferred_process_work){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:2605 [inline] #1: ffffc9000af87d20 (deferred_process_work){+.+.}-{0:0}, at: process_scheduled_works+0x825/0x1400 kernel/workqueue.c:2703 #2: ffffffff8eb36bc8 (rtnl_mutex){+.+.}-{3:3}, at: switchdev_deferred_process_work+0xe/0x20 net/switchdev/switchdev.c:75 2 locks held by kworker/0:9/5960: #0: ffff888012c72938 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:2605 [inline] #0: ffff888012c72938 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: process_scheduled_works+0x825/0x1400 kernel/workqueue.c:2703 #1: ffffc9000af97d20 ((work_completion)(&rew->rew_work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:2605 [inline] #1: ffffc9000af97d20 ((work_completion)(&rew->rew_work)){+.+.}-{0:0}, at: process_scheduled_works+0x825/0x1400 kernel/workqueue.c:2703 1 lock held by syz-executor.4/6018: #0: ffffffff8eb36bc8 ( rtnl_mutex ){+.+.}-{3:3} , at: rtnl_lock net/core/rtnetlink.c:79 [inline] , at: rtnetlink_rcv_msg+0x82c/0x1030 net/core/rtnetlink.c:6555 1 lock held by syz-executor.5/6025: #0: ffffffff8eb36bc8 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline] ffffffff8eb36bc8 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x82c/0x1030 net/core/rtnetlink.c:6555 1 lock held by syz-executor.3/6033: #0: ffffffff8eb36bc8 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline] #0: ffffffff8eb36bc8 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x82c/0x1030 net/core/rtnetlink.c:6555 2 locks held by syz-executor.0/6037: #0: ffffffff8eb36bc8 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline] #0: ffffffff8eb36bc8 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x82c/0x1030 net/core/rtnetlink.c:6555 #1: ffffffff8d932a78 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:293 [inline] #1: ffffffff8d932a78 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x3a3/0x890 kernel/rcu/tree_exp.h:996 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 29 Comm: khungtaskd Not tainted 6.6.0-syzkaller-15859-g89cdf9d55601 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/09/2023 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x1e7/0x2d0 lib/dump_stack.c:106 nmi_cpu_backtrace+0x498/0x4d0 lib/nmi_backtrace.c:113 nmi_trigger_cpumask_backtrace+0x198/0x310 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+0xfa9/0xff0 kernel/hung_task.c:379 kthread+0x2d3/0x370 kernel/kthread.c:388 ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:242 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 5679 Comm: syz-executor.3 Not tainted 6.6.0-syzkaller-15859-g89cdf9d55601 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/09/2023 RIP: 0010:vsnprintf+0x901/0x1d80 lib/vsprintf.c:2778 Code: 00 00 00 fc ff df 41 0f b6 04 07 84 c0 0f 85 44 12 00 00 44 89 2a 49 bd 00 00 00 00 00 fc ff df e9 f0 05 00 00 4c 8b 74 24 28 <4c> 3b 74 24 18 0f 83 01 06 00 00 e8 bf 33 7d f6 4c 8b 6c 24 18 4d RSP: 0018:ffffc9000a516400 EFLAGS: 00000246 RAX: 0000000000000000 RBX: 0000000000000001 RCX: ffff8880208a1dc0