INFO: task jfsCommit:276 blocked for more than 143 seconds. Not tainted syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:jfsCommit state:D stack:27584 pid: 276 ppid: 2 flags:0x00004000 Call Trace: context_switch kernel/sched/core.c:5049 [inline] __schedule+0x11bb/0x4390 kernel/sched/core.c:6395 schedule+0x11b/0x1e0 kernel/sched/core.c:6478 io_schedule+0x7c/0xd0 kernel/sched/core.c:8503 __lock_metapage+0x1a9/0x380 fs/jfs/jfs_metapage.c:49 lock_metapage fs/jfs/jfs_metapage.c:63 [inline] __get_metapage+0x43e/0x1060 fs/jfs/jfs_metapage.c:640 diIAGRead+0xce/0x140 fs/jfs/jfs_imap.c:2672 diFree+0x898/0x2460 fs/jfs/jfs_imap.c:959 jfs_evict_inode+0x327/0x430 fs/jfs/inode.c:162 evict+0x485/0x870 fs/inode.c:647 txLazyCommit fs/jfs/jfs_txnmgr.c:2699 [inline] jfs_lazycommit+0x437/0xb20 fs/jfs/jfs_txnmgr.c:2767 kthread+0x436/0x520 kernel/kthread.c:334 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287 INFO: task jfsCommit:277 blocked for more than 144 seconds. Not tainted syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:jfsCommit state:D stack:26824 pid: 277 ppid: 2 flags:0x00004000 Call Trace: context_switch kernel/sched/core.c:5049 [inline] __schedule+0x11bb/0x4390 kernel/sched/core.c:6395 schedule+0x11b/0x1e0 kernel/sched/core.c:6478 io_schedule+0x7c/0xd0 kernel/sched/core.c:8503 __lock_metapage+0x1a9/0x380 fs/jfs/jfs_metapage.c:49 lock_metapage fs/jfs/jfs_metapage.c:63 [inline] __get_metapage+0x43e/0x1060 fs/jfs/jfs_metapage.c:640 diIAGRead+0xce/0x140 fs/jfs/jfs_imap.c:2672 diFree+0x898/0x2460 fs/jfs/jfs_imap.c:959 jfs_evict_inode+0x327/0x430 fs/jfs/inode.c:162 evict+0x485/0x870 fs/inode.c:647 txLazyCommit fs/jfs/jfs_txnmgr.c:2699 [inline] jfs_lazycommit+0x437/0xb20 fs/jfs/jfs_txnmgr.c:2767 kthread+0x436/0x520 kernel/kthread.c:334 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287 Showing all locks held in the system: 1 lock held by khungtaskd/27: #0: ffffffff8c11c720 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30 2 locks held by jfsCommit/276: #0: ffff88807d940920 (&(imap->im_aglock[index])){+.+.}-{3:3}, at: diFree+0x2a4/0x2460 fs/jfs/jfs_imap.c:889 #1: ffff8880607a2638 (&jfs_ip->rdwrlock/1){.+.+}-{3:3}, at: diFree+0x2c2/0x2460 fs/jfs/jfs_imap.c:894 2 locks held by jfsCommit/277: #0: ffff888027b20920 (&(imap->im_aglock[index])){+.+.}-{3:3}, at: diFree+0x2a4/0x2460 fs/jfs/jfs_imap.c:889 #1: ffff88806061a638 (&jfs_ip->rdwrlock/1){.+.+}-{3:3}, at: diFree+0x2c2/0x2460 fs/jfs/jfs_imap.c:894 2 locks held by getty/3943: #0: ffff88802bf57098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x21/0x70 drivers/tty/tty_ldisc.c:252 #1: ffffc900026562e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x5ba/0x1a30 drivers/tty/n_tty.c:2158 2 locks held by syz-executor/4181: #0: ffff88807a5560e0 (&type->s_umount_key#55){++++}-{3:3}, at: deactivate_super+0xa0/0xd0 fs/super.c:365 #1: ffffffff8c4c3d08 (jfs_log_mutex){+.+.}-{3:3}, at: lmLogClose+0xb0/0x520 fs/jfs/jfs_logmgr.c:1452 2 locks held by syz-executor/4183: #0: ffff88801e6e40e0 (&type->s_umount_key#55){++++}-{3:3}, at: deactivate_super+0xa0/0xd0 fs/super.c:365 #1: ffffffff8c4c3d08 (jfs_log_mutex){+.+.}-{3:3}, at: lmLogClose+0xb0/0x520 fs/jfs/jfs_logmgr.c:1452 2 locks held by syz-executor/4184: #0: ffff88807b49e0e0 (&type->s_umount_key#55){++++}-{3:3}, at: deactivate_super+0xa0/0xd0 fs/super.c:365 #1: ffffffff8c4c3d08 (jfs_log_mutex){+.+.}-{3:3}, at: lmLogClose+0xb0/0x520 fs/jfs/jfs_logmgr.c:1452 2 locks held by syz-executor/4190: #0: ffff88801adc20e0 (&type->s_umount_key#55){++++}-{3:3}, at: deactivate_super+0xa0/0xd0 fs/super.c:365 #1: ffffffff8c4c3d08 (jfs_log_mutex){+.+.}-{3:3}, at: lmLogClose+0xb0/0x520 fs/jfs/jfs_logmgr.c:1452 2 locks held by kworker/1:6/4327: #0: ffff888016872138 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: process_one_work+0x760/0x1000 kernel/workqueue.c:-1 #1: ffffc90002fffd00 ((work_completion)(&rew.rew_work)){+.+.}-{0:0}, at: process_one_work+0x7a3/0x1000 kernel/workqueue.c:2285 2 locks held by syz-executor/4579: #0: ffff88807c1640e0 (&type->s_umount_key#55){++++}-{3:3}, at: deactivate_super+0xa0/0xd0 fs/super.c:365 #1: ffffffff8c4c3d08 (jfs_log_mutex){+.+.}-{3:3}, at: lmLogClose+0xb0/0x520 fs/jfs/jfs_logmgr.c:1452 2 locks held by syz-executor/4681: #0: ffff8880600040e0 (&type->s_umount_key#55){++++}-{3:3}, at: deactivate_super+0xa0/0xd0 fs/super.c:365 #1: ffffffff8c4c3d08 (jfs_log_mutex){+.+.}-{3:3}, at: lmLogClose+0xb0/0x520 fs/jfs/jfs_logmgr.c:1452 1 lock held by syz-executor/4695: #0: ffff8880251a40e0 (&type->s_umount_key#55){++++}-{3:3}, at: deactivate_super+0xa0/0xd0 fs/super.c:365 2 locks held by syz-executor/4786: #0: ffff88807acbc0e0 (&type->s_umount_key#55){++++}-{3:3}, at: deactivate_super+0xa0/0xd0 fs/super.c:365 #1: ffffffff8c4c3d08 (jfs_log_mutex){+.+.}-{3:3}, at: lmLogClose+0xb0/0x520 fs/jfs/jfs_logmgr.c:1452 2 locks held by syz-executor/4875: #0: ffff888078c7e0e0 (&type->s_umount_key#55){++++}-{3:3}, at: deactivate_super+0xa0/0xd0 fs/super.c:365 #1: ffffffff8c4c3d08 (jfs_log_mutex){+.+.}-{3:3}, at: lmLogClose+0xb0/0x520 fs/jfs/jfs_logmgr.c:1452 1 lock held by syz-executor/4978: #0: ffffffff8c1211a8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:290 [inline] #0: ffffffff8c1211a8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x347/0x6b0 kernel/rcu/tree_exp.h:845 2 locks held by dhcpcd/5335: #0: ffff888058d34410 (&sb->s_type->i_mutex_key#11){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:787 [inline] #0: ffff888058d34410 (&sb->s_type->i_mutex_key#11){+.+.}-{3:3}, at: __sock_release net/socket.c:650 [inline] #0: ffff888058d34410 (&sb->s_type->i_mutex_key#11){+.+.}-{3:3}, at: sock_close+0x90/0x240 net/socket.c:1346 #1: ffffffff8c1211a8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:322 [inline] #1: ffffffff8c1211a8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x320/0x6b0 kernel/rcu/tree_exp.h:845 1 lock held by syz.4.231/6172: #0: ffff88807a5560e0 (&type->s_umount_key#55){++++}-{3:3}, at: iterate_supers+0xa4/0x1d0 fs/super.c:716 1 lock held by syz.3.345/6905: #0: ffff88801e6e40e0 (&type->s_umount_key#55){++++}-{3:3}, at: user_get_super+0x118/0x240 fs/super.c:850 1 lock held by dhcpcd-run-hook/7118: ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 27 Comm: khungtaskd Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025 Call Trace: dump_stack_lvl+0x168/0x230 lib/dump_stack.c:106 nmi_cpu_backtrace+0x397/0x3d0 lib/nmi_backtrace.c:111 nmi_trigger_cpumask_backtrace+0x163/0x280 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:148 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:212 [inline] watchdog+0xe0f/0xe50 kernel/hung_task.c:369 kthread+0x436/0x520 kernel/kthread.c:334 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 1092 Comm: kworker/0:1H Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025 Workqueue: 0x0 (kblockd) RIP: 0010:irq_time_read kernel/sched/sched.h:2811 [inline] RIP: 0010:update_rq_clock_task kernel/sched/core.c:620 [inline] RIP: 0010:update_rq_clock+0x161/0x450 kernel/sched/core.c:686 Code: 00 00 48 8b 04 24 44 8b 38 49 83 ff 08 0f 83 9b 02 00 00 49 63 c7 4c 8d 3c c5 20 08 bc 8b 4c 89 f8 48 c1 e8 03 42 80 3c 28 00 <74> 08 4c 89 ff e8 c5 b3 6a 00 49 c7 c4 80 77 02 00 4d 03 27 4c 89 RSP: 0000:ffffc900046efb78 EFLAGS: 00000046 RAX: 1ffffffff1778104 RBX: ffff8880b903a340 RCX: 0000000000000001 RDX: 1ffffffff1dd7e00 RSI: ffffffff8eebf01c RDI: ffffffff8eebf000 RBP: 0000000000013d27 R08: ffffffff8eebf008 R09: ffffffff8eebf018 R10: ffffffff8eebf010 R11: ffffffff8eebf003 R12: ffff8880b903ad88 R13: dffffc0000000000 R14: 1ffff110172075b1 R15: ffffffff8bbc0820 FS: 0000000000000000(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f11052b0636 CR3: 0000000054c17000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __schedule+0x35d/0x4390 kernel/sched/core.c:6314 schedule+0x11b/0x1e0 kernel/sched/core.c:6478 worker_thread+0xf5c/0x12a0 kernel/workqueue.c:2478 kthread+0x436/0x520 kernel/kthread.c:334 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287