INFO: task jfsCommit:277 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:27824 pid: 277 ppid: 2 flags:0x00004000 Call Trace: context_switch kernel/sched/core.c:5049 [inline] __schedule+0x11c3/0x4350 kernel/sched/core.c:6395 schedule+0x11b/0x1e0 kernel/sched/core.c:6478 io_schedule+0x7c/0xd0 kernel/sched/core.c:8503 __lock_metapage+0x1b8/0x390 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+0x8e1/0x2470 fs/jfs/jfs_imap.c:959 jfs_evict_inode+0x31a/0x430 fs/jfs/inode.c:162 evict+0x4b6/0x8b0 fs/inode.c:647 txLazyCommit fs/jfs/jfs_txnmgr.c:2699 [inline] jfs_lazycommit+0x445/0xb60 fs/jfs/jfs_txnmgr.c:2767 kthread+0x42e/0x520 kernel/kthread.c:334 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287 INFO: task jfsCommit:278 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:26816 pid: 278 ppid: 2 flags:0x00004000 Call Trace: context_switch kernel/sched/core.c:5049 [inline] __schedule+0x11c3/0x4350 kernel/sched/core.c:6395 schedule+0x11b/0x1e0 kernel/sched/core.c:6478 io_schedule+0x7c/0xd0 kernel/sched/core.c:8503 __lock_metapage+0x1b8/0x390 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+0x8e1/0x2470 fs/jfs/jfs_imap.c:959 jfs_evict_inode+0x31a/0x430 fs/jfs/inode.c:162 evict+0x4b6/0x8b0 fs/inode.c:647 txLazyCommit fs/jfs/jfs_txnmgr.c:2699 [inline] jfs_lazycommit+0x445/0xb60 fs/jfs/jfs_txnmgr.c:2767 kthread+0x42e/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: ffffffff8c31ef60 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30 2 locks held by jfsCommit/277: #0: ffff88807baa0920 (&(imap->im_aglock[index])){+.+.}-{3:3}, at: diFree+0x2e1/0x2470 fs/jfs/jfs_imap.c:889 #1: ffff888057ed2638 (&jfs_ip->rdwrlock/1){.+.+}-{3:3}, at: diFree+0x2ff/0x2470 fs/jfs/jfs_imap.c:894 2 locks held by jfsCommit/278: #0: ffff88802c088920 (&(imap->im_aglock[index])){+.+.}-{3:3}, at: diFree+0x2e1/0x2470 fs/jfs/jfs_imap.c:889 #1: ffff888057eb2f78 (&jfs_ip->rdwrlock/1){.+.+}-{3:3}, at: diFree+0x2ff/0x2470 fs/jfs/jfs_imap.c:894 3 locks held by kworker/u4:5/1486: 2 locks held by getty/3944: #0: ffff88802c23b098 (&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+0x594/0x1a50 drivers/tty/n_tty.c:2158 2 locks held by syz-executor/4920: #0: ffff88801eb4c0e0 (&type->s_umount_key#56){+.+.}-{3:3}, at: deactivate_super+0xa0/0xd0 fs/super.c:365 #1: ffffffff8c6c8548 (jfs_log_mutex){+.+.}-{3:3}, at: lmLogClose+0xa9/0x530 fs/jfs/jfs_logmgr.c:1452 2 locks held by syz-executor/4924: #0: ffff88807e22a0e0 (&type->s_umount_key#56){+.+.}-{3:3}, at: deactivate_super+0xa0/0xd0 fs/super.c:365 #1: ffffffff8c6c8548 (jfs_log_mutex){+.+.}-{3:3}, at: lmLogClose+0xa9/0x530 fs/jfs/jfs_logmgr.c:1452 2 locks held by syz-executor/4926: #0: ffff888073db40e0 (&type->s_umount_key#56){+.+.}-{3:3}, at: deactivate_super+0xa0/0xd0 fs/super.c:365 #1: ffffffff8c6c8548 (jfs_log_mutex){+.+.}-{3:3}, at: lmLogClose+0xa9/0x530 fs/jfs/jfs_logmgr.c:1452 2 locks held by syz-executor/4936: #0: ffff8880587480e0 (&type->s_umount_key#56){+.+.}-{3:3}, at: deactivate_super+0xa0/0xd0 fs/super.c:365 #1: ffffffff8c6c8548 (jfs_log_mutex){+.+.}-{3:3}, at: lmLogClose+0xa9/0x530 fs/jfs/jfs_logmgr.c:1452 1 lock held by udevd/5596: 2 locks held by syz-executor/5765: #0: ffff88801fcfa0e0 (&type->s_umount_key#56){+.+.}-{3:3}, at: deactivate_super+0xa0/0xd0 fs/super.c:365 #1: ffffffff8c6c8548 (jfs_log_mutex){+.+.}-{3:3}, at: lmLogClose+0xa9/0x530 fs/jfs/jfs_logmgr.c:1452 2 locks held by syz-executor/5805: #0: ffff88802b7880e0 (&type->s_umount_key#56){+.+.}-{3:3}, at: deactivate_super+0xa0/0xd0 fs/super.c:365 #1: ffffffff8c6c8548 (jfs_log_mutex){+.+.}-{3:3}, at: lmLogClose+0xa9/0x530 fs/jfs/jfs_logmgr.c:1452 2 locks held by syz-executor/5867: #0: ffff8880203da0e0 (&type->s_umount_key#56){+.+.}-{3:3}, at: deactivate_super+0xa0/0xd0 fs/super.c:365 #1: ffffffff8c6c8548 (jfs_log_mutex){+.+.}-{3:3}, at: lmLogClose+0xa9/0x530 fs/jfs/jfs_logmgr.c:1452 2 locks held by syz-executor/5868: #0: ffff88801e6da0e0 (&type->s_umount_key#56){+.+.}-{3:3}, at: deactivate_super+0xa0/0xd0 fs/super.c:365 #1: ffffffff8c6c8548 (jfs_log_mutex){+.+.}-{3:3}, at: lmLogClose+0xa9/0x530 fs/jfs/jfs_logmgr.c:1452 2 locks held by syz-executor/5898: #0: ffff88805593a0e0 (&type->s_umount_key#56){+.+.}-{3:3}, at: deactivate_super+0xa0/0xd0 fs/super.c:365 #1: ffffffff8c6c8548 (jfs_log_mutex){+.+.}-{3:3}, at: lmLogClose+0xa9/0x530 fs/jfs/jfs_logmgr.c:1452 1 lock held by syz-executor/6301: #0: ffff888074ace0e0 (&type->s_umount_key#56){+.+.}-{3:3}, at: deactivate_super+0xa0/0xd0 fs/super.c:365 1 lock held by syz-executor/6434: 2 locks held by syz.5.371/8285: 4 locks held by dhcpcd-run-hook/8297: #0: ffff8880b903a358 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x25/0x130 kernel/sched/core.c:475 #1: ffff8880b9027888 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: psi_task_switch+0x517/0x810 kernel/sched/psi.c:891 #2: ffffffff8c31ef60 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30 #3: ffff888028eba7e8 (&p->pi_lock){-.-.}-{2:2}, at: try_to_wake_up+0x5a/0x1020 kernel/sched/core.c:4049 2 locks held by dhcpcd-run-hook/8302: ============================================= 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 07/16/2026 Call Trace: dump_stack_lvl+0x188/0x250 lib/dump_stack.c:106 nmi_cpu_backtrace+0x3a2/0x3d0 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+0xe1b/0xe60 kernel/hung_task.c:369 kthread+0x42e/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: 8295 Comm: syz.0.373 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/16/2026 RIP: 0033:0x7fb189dbeb40 Code: 49 8b 47 10 48 39 f0 72 76 48 63 cd 48 01 c1 49 39 4f 08 72 54 8d 4d ff 85 ed 74 3b 66 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 <48> 39 f0 72 1b 4d 8b 07 49 89 c1 49 29 f1 47 0f b6 0c 08 45 84 c9 RSP: 002b:00007fb18916b470 EFLAGS: 00000202 RAX: 0000000000fb6d7c RBX: 00007fb18916b530 RCX: 00000000000000b0 RDX: 0000000000000000 RSI: 0000000000000001 RDI: 00007fb18916b5d0 RBP: 0000000000000102 R08: 00007fb180d4c000 R09: 0000000000000000 R10: 0000000000000000 R11: 00007fb18916b540 R12: 0000000000000001 R13: 00007fb189fb5520 R14: 0000000000000000 R15: 00007fb18916b5d0 FS: 00007fb18916c6c0 GS: 0000000000000000