INFO: task kworker/0:1H:44 blocked for more than 143 seconds. Not tainted 6.11.0-rc3-syzkaller-00036-g9d5906799f7d #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/0:1H state:D stack:26712 pid:44 tgid:44 ppid:2 flags:0x00004000 Workqueue: xfs-log/loop1 xlog_ioend_work Call Trace: context_switch kernel/sched/core.c:5188 [inline] __schedule+0x17ae/0x4a10 kernel/sched/core.c:6529 __schedule_loop kernel/sched/core.c:6606 [inline] schedule+0x14b/0x320 kernel/sched/core.c:6621 schedule_timeout+0xb0/0x310 kernel/time/timer.c:2557 ___down_common kernel/locking/semaphore.c:225 [inline] __down_common+0x343/0x7f0 kernel/locking/semaphore.c:246 down+0x84/0xc0 kernel/locking/semaphore.c:63 xfs_buf_lock+0x164/0x510 fs/xfs/xfs_buf.c:1196 xfs_buf_item_unpin+0x1dd/0x710 fs/xfs/xfs_buf_item.c:582 xlog_cil_committed+0x82f/0xf00 fs/xfs/xfs_log_cil.c:910 xlog_cil_process_committed+0x15c/0x1b0 fs/xfs/xfs_log_cil.c:941 xlog_state_shutdown_callbacks+0x2ba/0x3b0 fs/xfs/xfs_log.c:487 xlog_force_shutdown+0x32c/0x390 fs/xfs/xfs_log.c:3530 xlog_ioend_work+0xad/0x100 fs/xfs/xfs_log.c:1244 process_one_work kernel/workqueue.c:3231 [inline] process_scheduled_works+0xa2c/0x1830 kernel/workqueue.c:3312 worker_thread+0x86d/0xd40 kernel/workqueue.c:3390 kthread+0x2f0/0x390 kernel/kthread.c:389 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 INFO: task syz.1.44:5605 blocked for more than 144 seconds. Not tainted 6.11.0-rc3-syzkaller-00036-g9d5906799f7d #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz.1.44 state:D stack:26040 pid:5605 tgid:5577 ppid:5231 flags:0x00004006 Call Trace: context_switch kernel/sched/core.c:5188 [inline] __schedule+0x17ae/0x4a10 kernel/sched/core.c:6529 __schedule_loop kernel/sched/core.c:6606 [inline] schedule+0x14b/0x320 kernel/sched/core.c:6621 xlog_wait fs/xfs/xfs_log_priv.h:587 [inline] xlog_wait_on_iclog+0x501/0x770 fs/xfs/xfs_log.c:840 xlog_force_lsn+0x523/0x9e0 fs/xfs/xfs_log.c:3066 xfs_log_force_seq+0x1da/0x450 fs/xfs/xfs_log.c:3103 __xfs_trans_commit+0xb98/0x1290 fs/xfs/xfs_trans.c:900 xfs_sync_sb_buf+0x2dc/0x370 fs/xfs/libxfs/xfs_sb.c:1178 xfs_ioc_setlabel fs/xfs/xfs_ioctl.c:1143 [inline] xfs_file_ioctl+0x165b/0x19e0 fs/xfs/xfs_ioctl.c:1298 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:907 [inline] __se_sys_ioctl+0xfc/0x170 fs/ioctl.c:893 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f68687799f9 RSP: 002b:00007f68694f3038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f6868916058 RCX: 00007f68687799f9 RDX: 0000000020000040 RSI: 0000000041009432 RDI: 000000000000000a RBP: 00007f68687e78ee R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f6868916058 R15: 00007ffc98eaeaf8 Showing all locks held in the system: 1 lock held by pool_workqueue_/3: #0: ffffffff8e73d6b8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:328 [inline] #0: ffffffff8e73d6b8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x451/0x830 kernel/rcu/tree_exp.h:958 1 lock held by khungtaskd/30: #0: ffffffff8e7382e0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:326 [inline] #0: ffffffff8e7382e0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:838 [inline] #0: ffffffff8e7382e0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6626 2 locks held by kworker/0:1H/44: #0: ffff88807c19d148 ((wq_completion)xfs-log/loop1){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3206 [inline] #0: ffff88807c19d148 ((wq_completion)xfs-log/loop1){+.+.}-{0:0}, at: process_scheduled_works+0x90a/0x1830 kernel/workqueue.c:3312 #1: ffffc90000b47d00 ((work_completion)(&iclog->ic_end_io_work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3207 [inline] #1: ffffc90000b47d00 ((work_completion)(&iclog->ic_end_io_work)){+.+.}-{0:0}, at: process_scheduled_works+0x945/0x1830 kernel/workqueue.c:3312 2 locks held by kworker/u8:6/1060: 1 lock held by udevd/4671: 2 locks held by getty/4975: #0: ffff88802fc180a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243 #1: ffffc900031332f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6ac/0x1e00 drivers/tty/n_tty.c:2211 2 locks held by kworker/1:4/5275: 1 lock held by syz.1.44/5605: #0: ffff888056f00420 (sb_writers#14){.+.+}-{0:0}, at: mnt_want_write_file+0x61/0x200 fs/namespace.c:559 1 lock held by syz-executor/7340: ============================================= NMI backtrace for cpu 1 CPU: 1 UID: 0 PID: 30 Comm: khungtaskd Not tainted 6.11.0-rc3-syzkaller-00036-g9d5906799f7d #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/27/2024 Call Trace: __dump_stack lib/dump_stack.c:93 [inline] dump_stack_lvl+0x241/0x360 lib/dump_stack.c:119 nmi_cpu_backtrace+0x49c/0x4d0 lib/nmi_backtrace.c:113 nmi_trigger_cpumask_backtrace+0x198/0x320 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:162 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:223 [inline] watchdog+0xfee/0x1030 kernel/hung_task.c:379 kthread+0x2f0/0x390 kernel/kthread.c:389 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 UID: 0 PID: 5274 Comm: kworker/0:6 Not tainted 6.11.0-rc3-syzkaller-00036-g9d5906799f7d #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/27/2024 Workqueue: rcu_gp process_srcu RIP: 0010:delay_tsc+0x5c/0xe0 arch/x86/lib/delay.c:79 Code: 90 48 89 d5 48 c1 e5 20 48 09 c5 48 29 dd 4c 39 f5 73 67 bf 01 00 00 00 e8 e1 21 b9 f5 65 8b 05 52 07 5a 74 85 c0 74 2f f3 90 01 00 00 00 e8 2a 20 b9 f5 e8 d5 f7 03 00 41 39 c7 75 20 0f 01 RSP: 0018:ffffc90003ff7a30 EFLAGS: 00000286 RAX: 0000000080000000 RBX: 00000082efa667c9 RCX: 0000000000000001 RDX: 0000000000000082 RSI: ffffffff8c3f9520 RDI: 0000000000000001 RBP: 00000000000003f0 R08: ffff8880b934640f R09: 1ffff11017268c81 R10: dffffc0000000000 R11: ffffffff8ba9cf60 R12: ffffffff94d5ab08 R13: 0000000000000002 R14: 0000000000002af9 R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff8880b9200000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055556b2e4808 CR3: 000000000e534000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: try_check_zero+0x392/0x3e0 kernel/rcu/srcutree.c:1084 srcu_advance_state kernel/rcu/srcutree.c:1705 [inline] process_srcu+0x24a/0x1320 kernel/rcu/srcutree.c:1814 process_one_work kernel/workqueue.c:3231 [inline] process_scheduled_works+0xa2c/0x1830 kernel/workqueue.c:3312 worker_thread+0x86d/0xd40 kernel/workqueue.c:3390 kthread+0x2f0/0x390 kernel/kthread.c:389 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244