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:27184 pid: 276 ppid: 2 flags:0x00004000 Call Trace: context_switch kernel/sched/core.c:5049 [inline] __schedule+0x11ef/0x43c0 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+0x8e1/0x2430 fs/jfs/jfs_imap.c:959 jfs_evict_inode+0x327/0x430 fs/jfs/inode.c:162 evict+0x4c9/0x8d0 fs/inode.c:647 txLazyCommit fs/jfs/jfs_txnmgr.c:2699 [inline] jfs_lazycommit+0x435/0xb40 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: ffffffff8c31eb20 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30 2 locks held by jfsCommit/275: #0: ffff88804fa88920 (&(imap->im_aglock[index])){+.+.}-{3:3}, at: diFree+0x2d6/0x2430 fs/jfs/jfs_imap.c:889 #1: ffff88805069af78 (&jfs_ip->rdwrlock/1){++++}-{3:3}, at: diFree+0x2f4/0x2430 fs/jfs/jfs_imap.c:894 2 locks held by jfsCommit/276: #0: ffff88807add0920 (&(imap->im_aglock[index])){+.+.}-{3:3}, at: diFree+0x2d6/0x2430 fs/jfs/jfs_imap.c:889 #1: ffff888050572638 (&jfs_ip->rdwrlock/1){++++}-{3:3}, at: diFree+0x2f4/0x2430 fs/jfs/jfs_imap.c:894 1 lock held by udevd/3561: #0: ffff8880208b2118 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_get_by_dev+0x157/0xa60 block/bdev.c:820 2 locks held by getty/3951: #0: ffff88802cd14098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x21/0x70 drivers/tty/tty_ldisc.c:252 #1: ffffc90002cf62e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x5df/0x1a70 drivers/tty/n_tty.c:2158 2 locks held by syz-executor/7534: #0: ffff88804ff3a0e0 (&type->s_umount_key#82){++++}-{3:3}, at: deactivate_super+0xa0/0xd0 fs/super.c:365 #1: ffffffff8c6c60e8 (jfs_log_mutex){+.+.}-{3:3}, at: lmLogClose+0xb0/0x520 fs/jfs/jfs_logmgr.c:1452 1 lock held by udevd/8933: #0: ffff8880208b2118 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_get_by_dev+0x157/0xa60 block/bdev.c:820 2 locks held by syz-executor/12164: #0: ffff8880601840e0 (&type->s_umount_key#82){++++}-{3:3}, at: deactivate_super+0xa0/0xd0 fs/super.c:365 #1: ffffffff8c6c60e8 (jfs_log_mutex){+.+.}-{3:3}, at: lmLogClose+0xb0/0x520 fs/jfs/jfs_logmgr.c:1452 2 locks held by syz-executor/18928: #0: ffff8880521180e0 (&type->s_umount_key#82){++++}-{3:3}, at: deactivate_super+0xa0/0xd0 fs/super.c:365 #1: ffffffff8c6c60e8 (jfs_log_mutex){+.+.}-{3:3}, at: lmLogClose+0xb0/0x520 fs/jfs/jfs_logmgr.c:1452 2 locks held by syz-executor/19034: #0: ffff88802c3220e0 (&type->s_umount_key#82){++++}-{3:3}, at: deactivate_super+0xa0/0xd0 fs/super.c:365 #1: ffffffff8c6c60e8 (jfs_log_mutex){+.+.}-{3:3}, at: lmLogClose+0xb0/0x520 fs/jfs/jfs_logmgr.c:1452 2 locks held by syz-executor/19113: #0: ffff88805d2ba0e0 (&type->s_umount_key#82){++++}-{3:3}, at: deactivate_super+0xa0/0xd0 fs/super.c:365 #1: ffffffff8c6c60e8 (jfs_log_mutex){+.+.}-{3:3}, at: lmLogClose+0xb0/0x520 fs/jfs/jfs_logmgr.c:1452 2 locks held by syz-executor/19730: #0: ffff888019bd20e0 (&type->s_umount_key#82){++++}-{3:3}, at: deactivate_super+0xa0/0xd0 fs/super.c:365 #1: ffffffff8c6c60e8 (jfs_log_mutex){+.+.}-{3:3}, at: lmLogClose+0xb0/0x520 fs/jfs/jfs_logmgr.c:1452 4 locks held by syz.0.3028/20786: #0: ffff8880773a8ff0 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0x2bf/0x370 fs/file.c:1056 #1: ffff88805e902460 (sb_writers#24){.+.+}-{0:0}, at: vfs_writev fs/read_write.c:927 [inline] #1: ffff88805e902460 (sb_writers#24){.+.+}-{0:0}, at: do_writev+0x263/0x480 fs/read_write.c:971 #2: ffff8880506e8580 (&sb->s_type->i_mutex_key#31){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:787 [inline] #2: ffff8880506e8580 (&sb->s_type->i_mutex_key#31){+.+.}-{3:3}, at: jfs_fsync+0x94/0x1b0 fs/jfs/file.c:28 #3: ffff8880506e81c8 (&jfs_ip->commit_mutex){+.+.}-{3:3}, at: jfs_commit_inode+0x1c7/0x520 fs/jfs/inode.c:108 2 locks held by syz.7.3155/21562: #0: ffff8880208b2118 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_put+0xf9/0x7d0 block/bdev.c:915 #1: ffff88814745a468 (&lo->lo_mutex){+.+.}-{3:3}, at: lo_release+0x4d/0x1f0 drivers/block/loop.c:2071 2 locks held by rm/21594: ============================================= 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 04/18/2026 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+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: 1127 Comm: kworker/u4:3 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026 Workqueue: bat_events batadv_iv_send_outstanding_bat_ogm_packet RIP: 0010:arch_atomic_read arch/x86/include/asm/atomic.h:29 [inline] RIP: 0010:rcu_dynticks_curr_cpu_in_eqs kernel/rcu/tree.c:331 [inline] RIP: 0010:rcu_is_watching+0x56/0xa0 kernel/rcu/tree.c:1123 Code: f0 48 c1 e8 03 42 80 3c 38 00 74 08 4c 89 f7 e8 00 73 59 00 48 c7 c3 08 b3 03 00 49 03 1e 48 89 d8 48 c1 e8 03 42 0f b6 04 38 <84> c0 75 2b 8b 03 65 ff 0d 45 8f 9d 7e 74 08 24 01 5b 41 5e 41 5f RSP: 0018:ffffc90004637a20 EFLAGS: 00000a02 RAX: 0000000000000000 RBX: ffff8880b903b308 RCX: 9bc81f8b69882400 RDX: 0000000000000000 RSI: ffffffff8a79fe20 RDI: ffffffff8a79fde0 RBP: ffffc90004637b80 R08: dffffc0000000000 R09: 1ffffffff203aa18 R10: dffffc0000000000 R11: fffffbfff203aa19 R12: ffff888062cf8780 R13: dffffc0000000000 R14: ffffffff8be33820 R15: dffffc0000000000 FS: 0000000000000000(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffc54954f32 CR3: 00000000333d4000 CR4: 00000000003506f0 Call Trace: rcu_read_unlock include/linux/rcupdate.h:769 [inline] batadv_iv_ogm_slide_own_bcast_window net/batman-adv/bat_iv_ogm.c:774 [inline] batadv_iv_ogm_schedule_buff net/batman-adv/bat_iv_ogm.c:828 [inline] batadv_iv_ogm_schedule+0x663/0xec0 net/batman-adv/bat_iv_ogm.c:871 batadv_iv_send_outstanding_bat_ogm_packet+0x72f/0x840 net/batman-adv/bat_iv_ogm.c:1715 process_one_work+0x85f/0x1010 kernel/workqueue.c:2310 worker_thread+0xaa6/0x1290 kernel/workqueue.c:2457 kthread+0x436/0x520 kernel/kthread.c:334 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287