INFO: task kworker/1:1H:52 blocked for more than 143 seconds. Not tainted 6.3.0-syzkaller-12049-g58390c8ce1bd #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/1:1H state:D stack:24664 pid:52 ppid:2 flags:0x00004000 Workqueue: xfs-log/loop4 xlog_ioend_work Call Trace: context_switch kernel/sched/core.c:5343 [inline] __schedule+0x187b/0x4900 kernel/sched/core.c:6669 schedule+0xc3/0x180 kernel/sched/core.c:6745 schedule_timeout+0xb0/0x310 kernel/time/timer.c:2143 ___down_common+0x33e/0x5e0 kernel/locking/semaphore.c:225 __down_common+0x64/0x250 kernel/locking/semaphore.c:246 down+0x84/0xc0 kernel/locking/semaphore.c:63 xfs_buf_lock+0x154/0x4b0 fs/xfs/xfs_buf.c:1119 xfs_buf_item_unpin+0x200/0x720 fs/xfs/xfs_buf_item.c:547 xfs_trans_committed_bulk+0x346/0x830 fs/xfs/xfs_trans.c:806 xlog_cil_committed+0x26d/0xe40 fs/xfs/xfs_log_cil.c:795 xlog_cil_process_committed+0x159/0x1a0 fs/xfs/xfs_log_cil.c:823 xlog_state_shutdown_callbacks+0x2ba/0x3b0 fs/xfs/xfs_log.c:538 xlog_force_shutdown+0x32c/0x390 fs/xfs/xfs_log.c:3837 xlog_ioend_work+0xad/0x100 fs/xfs/xfs_log.c:1429 process_one_work+0x8a0/0x10e0 kernel/workqueue.c:2405 worker_thread+0xa63/0x1210 kernel/workqueue.c:2552 kthread+0x2b8/0x350 kernel/kthread.c:379 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308 INFO: task syz-executor.4:5777 blocked for more than 144 seconds. Not tainted 6.3.0-syzkaller-12049-g58390c8ce1bd #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.4 state:D stack:26400 pid:5777 ppid:5024 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:5343 [inline] __schedule+0x187b/0x4900 kernel/sched/core.c:6669 schedule+0xc3/0x180 kernel/sched/core.c:6745 xlog_wait+0x16e/0x1e0 fs/xfs/xfs_log_priv.h:617 xlog_force_lsn+0x512/0x770 fs/xfs/xfs_log.c:3340 xfs_log_force_seq+0x1da/0x450 fs/xfs/xfs_log.c:3409 __xfs_trans_commit+0xb4a/0xff0 fs/xfs/xfs_trans.c:1014 xfs_sync_sb_buf+0x14f/0x1e0 fs/xfs/libxfs/xfs_sb.c:1112 xfs_ioc_setlabel fs/xfs/xfs_ioctl.c:1801 [inline] xfs_file_ioctl+0x1313/0x16a0 fs/xfs/xfs_ioctl.c:1899 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:870 [inline] __se_sys_ioctl+0xf1/0x160 fs/ioctl.c:856 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7fd01248c169 RSP: 002b:00007fd01324a168 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007fd0125ac120 RCX: 00007fd01248c169 RDX: 0000000020000200 RSI: 0000000041009432 RDI: 0000000000000004 RBP: 00007fd0124e7ca1 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fffa68c1a5f R14: 00007fd01324a300 R15: 0000000000022000 Showing all locks held in the system: 1 lock held by rcu_tasks_kthre/13: #0: ffffffff8cf277b0 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x29/0xd20 kernel/rcu/tasks.h:518 1 lock held by rcu_tasks_trace/14: #0: ffffffff8cf27b70 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x29/0xd20 kernel/rcu/tasks.h:518 1 lock held by khungtaskd/28: #0: ffffffff8cf275e0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30 2 locks held by kworker/1:1H/52: #0: ffff88802b030538 ((wq_completion)xfs-log/loop4){+.+.}-{0:0}, at: process_one_work+0x77e/0x10e0 kernel/workqueue.c:2378 #1: ffffc90000bd7d20 ((work_completion)(&iclog->ic_end_io_work)){+.+.}-{0:0}, at: process_one_work+0x7c8/0x10e0 kernel/workqueue.c:2380 1 lock held by udevd/4443: 2 locks held by getty/4740: #0: ffff88814b6e9098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243 #1: ffffc900015a02f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6ab/0x1db0 drivers/tty/n_tty.c:2176 2 locks held by syz-executor.2/5032: #0: ffff88808f4d00e0 (&type->s_umount_key#57){++++}-{3:3}, at: deactivate_super+0xad/0xf0 fs/super.c:361 #1: ffffffff8cf2ccb8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:293 [inline] #1: ffffffff8cf2ccb8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x3a3/0x890 kernel/rcu/tree_exp.h:992 2 locks held by kworker/0:4/5082: #0: ffff888012472538 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: process_one_work+0x77e/0x10e0 kernel/workqueue.c:2378 #1: ffffc9000448fd20 ((work_completion)(&rew->rew_work)){+.+.}-{0:0}, at: process_one_work+0x7c8/0x10e0 kernel/workqueue.c:2380 1 lock held by syz-executor.4/5777: #0: ffff8880337c6460 (sb_writers#17){.+.+}-{0:0}, at: mnt_want_write_file+0x5e/0x1f0 fs/namespace.c:438 ============================================= NMI backtrace for cpu 0 CPU: 0 PID: 28 Comm: khungtaskd Not tainted 6.3.0-syzkaller-12049-g58390c8ce1bd #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/14/2023 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+0x187/0x300 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:148 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:222 [inline] watchdog+0xec2/0xf00 kernel/hung_task.c:379 kthread+0x2b8/0x350 kernel/kthread.c:379 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 5804 Comm: kworker/u4:7 Not tainted 6.3.0-syzkaller-12049-g58390c8ce1bd #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/14/2023 Workqueue: bat_events batadv_nc_worker RIP: 0010:mark_usage kernel/locking/lockdep.c:4560 [inline] RIP: 0010:__lock_acquire+0x10ad/0x2000 kernel/locking/lockdep.c:5028 Code: c7 60 a3 ea 8a e8 b3 75 41 09 4c 89 ef e8 2b 45 00 00 48 c7 c7 40 9a ea 8a e8 9f 75 41 09 e8 fa 4f 43 09 31 c9 e9 6a 02 00 00 <4c> 89 e7 48 89 ee a9 00 00 03 00 74 4d ba 03 00 00 00 e8 ac 58 00 RSP: 0018:ffffc9000b9ff8f8 EFLAGS: 00000046 RAX: 00000000000406cd RBX: 1ffff11005979c8f RCX: 00000000000406cd RDX: dffffc0000000000 RSI: 0000000000000008 RDI: ffffffff90328338 RBP: ffff88802cbce458 R08: dffffc0000000000 R09: fffffbfff2065068 R10: 0000000000000000 R11: dffffc0000000001 R12: ffff88802cbcd940 R13: 1ffff11005979c7d R14: 0000000000000002 R15: ffff88802cbce478 FS: 0000000000000000(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000000 CR3: 000000002b137000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: lock_acquire+0x1e3/0x520 kernel/locking/lockdep.c:5691 __raw_spin_lock_bh include/linux/spinlock_api_smp.h:126 [inline] _raw_spin_lock_bh+0x35/0x50 kernel/locking/spinlock.c:178 spin_lock_bh include/linux/spinlock.h:355 [inline] batadv_nc_purge_paths+0xe8/0x3a0 net/batman-adv/network-coding.c:442 batadv_nc_worker+0x30f/0x5c0 net/batman-adv/network-coding.c:722 process_one_work+0x8a0/0x10e0 kernel/workqueue.c:2405 worker_thread+0xa63/0x1210 kernel/workqueue.c:2552 kthread+0x2b8/0x350 kernel/kthread.c:379 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308