INFO: task jfsCommit:112 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:27656 pid:112 ppid:2 flags:0x00004000 Call Trace: context_switch kernel/sched/core.c:5380 [inline] __schedule+0x14d2/0x44d0 kernel/sched/core.c:6699 schedule+0xbd/0x170 kernel/sched/core.c:6773 io_schedule+0x80/0xd0 kernel/sched/core.c:9022 __lock_metapage fs/jfs/jfs_metapage.c:50 [inline] lock_metapage+0x1ec/0x310 fs/jfs/jfs_metapage.c:64 __get_metapage+0x4ca/0xfa0 fs/jfs/jfs_metapage.c:639 diIAGRead+0xce/0x140 fs/jfs/jfs_imap.c:2672 diFree+0x978/0x2c10 fs/jfs/jfs_imap.c:959 jfs_evict_inode+0x32b/0x440 fs/jfs/inode.c:162 evict+0x486/0x870 fs/inode.c:705 txLazyCommit fs/jfs/jfs_txnmgr.c:2665 [inline] jfs_lazycommit+0x42b/0xa60 fs/jfs/jfs_txnmgr.c:2733 kthread+0x2fa/0x390 kernel/kthread.c:388 ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:152 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:293 INFO: task jfsCommit:113 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:27272 pid:113 ppid:2 flags:0x00004000 Call Trace: context_switch kernel/sched/core.c:5380 [inline] __schedule+0x14d2/0x44d0 kernel/sched/core.c:6699 schedule+0xbd/0x170 kernel/sched/core.c:6773 io_schedule+0x80/0xd0 kernel/sched/core.c:9022 __lock_metapage fs/jfs/jfs_metapage.c:50 [inline] lock_metapage+0x1ec/0x310 fs/jfs/jfs_metapage.c:64 __get_metapage+0x4ca/0xfa0 fs/jfs/jfs_metapage.c:639 diIAGRead+0xce/0x140 fs/jfs/jfs_imap.c:2672 diFree+0x978/0x2c10 fs/jfs/jfs_imap.c:959 jfs_evict_inode+0x32b/0x440 fs/jfs/inode.c:162 evict+0x486/0x870 fs/inode.c:705 txLazyCommit fs/jfs/jfs_txnmgr.c:2665 [inline] jfs_lazycommit+0x42b/0xa60 fs/jfs/jfs_txnmgr.c:2733 kthread+0x2fa/0x390 kernel/kthread.c:388 ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:152 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:293 Showing all locks held in the system: 1 lock held by khungtaskd/29: #0: ffffffff8cd2fee0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:334 [inline] #0: ffffffff8cd2fee0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:786 [inline] #0: ffffffff8cd2fee0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x290 kernel/locking/lockdep.c:6633 3 locks held by kworker/u4:3/49: 2 locks held by jfsCommit/112: #0: ffff88801d340920 (&(imap->im_aglock[index])){+.+.}-{3:3}, at: diFree+0x2a0/0x2c10 fs/jfs/jfs_imap.c:889 #1: ffff88805d49af78 (&jfs_ip->rdwrlock/1){.+.+}-{3:3}, at: diFree+0x2be/0x2c10 fs/jfs/jfs_imap.c:894 2 locks held by jfsCommit/113: #0: ffff88801bfd8920 (&(imap->im_aglock[index])){+.+.}-{3:3}, at: diFree+0x2a0/0x2c10 fs/jfs/jfs_imap.c:889 #1: ffff88805d7aaf78 (&jfs_ip->rdwrlock/1){.+.+}-{3:3}, at: diFree+0x2be/0x2c10 fs/jfs/jfs_imap.c:894 2 locks held by kworker/1:2/1899: #0: ffff888017870938 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:2609 [inline] #0: ffff888017870938 ((wq_completion)events){+.+.}-{0:0}, at: process_scheduled_works+0x957/0x15b0 kernel/workqueue.c:2711 #1: ffffc90005037d00 (key_gc_work){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:2609 [inline] #1: ffffc90005037d00 (key_gc_work){+.+.}-{0:0}, at: process_scheduled_works+0x957/0x15b0 kernel/workqueue.c:2711 2 locks held by getty/5549: #0: ffff888030c920a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243 #1: ffffc9000326e2f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x425/0x1380 drivers/tty/n_tty.c:2217 2 locks held by syz-executor/5791: #0: ffff88803070a0e0 (&type->s_umount_key#70){+.+.}-{3:3}, at: __super_lock fs/super.c:56 [inline] #0: ffff88803070a0e0 (&type->s_umount_key#70){+.+.}-{3:3}, at: __super_lock_excl fs/super.c:71 [inline] #0: ffff88803070a0e0 (&type->s_umount_key#70){+.+.}-{3:3}, at: deactivate_super+0xa4/0xe0 fs/super.c:513 #1: ffffffff8d1478e8 (jfs_log_mutex){+.+.}-{3:3}, at: lmLogClose+0xb4/0x520 fs/jfs/jfs_logmgr.c:1444 2 locks held by syz-executor/5800: #0: ffff8880766ba0e0 (&type->s_umount_key#70){+.+.}-{3:3}, at: __super_lock fs/super.c:56 [inline] #0: ffff8880766ba0e0 (&type->s_umount_key#70){+.+.}-{3:3}, at: __super_lock_excl fs/super.c:71 [inline] #0: ffff8880766ba0e0 (&type->s_umount_key#70){+.+.}-{3:3}, at: deactivate_super+0xa4/0xe0 fs/super.c:513 #1: ffffffff8d1478e8 (jfs_log_mutex){+.+.}-{3:3}, at: lmLogClose+0xb4/0x520 fs/jfs/jfs_logmgr.c:1444 3 locks held by kworker/1:4/5910: #0: ffff888017870938 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:2609 [inline] #0: ffff888017870938 ((wq_completion)events){+.+.}-{0:0}, at: process_scheduled_works+0x957/0x15b0 kernel/workqueue.c:2711 #1: ffffc90004d77d00 (free_ipc_work){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:2609 [inline] #1: ffffc90004d77d00 (free_ipc_work){+.+.}-{0:0}, at: process_scheduled_works+0x957/0x15b0 kernel/workqueue.c:2711 #2: ffffffff8cd358b8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:324 [inline] #2: ffffffff8cd358b8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x360/0x830 kernel/rcu/tree_exp.h:1004 3 locks held by kworker/u4:12/6349: #0: ffff888017873938 ((wq_completion)netns){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:2609 [inline] #0: ffff888017873938 ((wq_completion)netns){+.+.}-{0:0}, at: process_scheduled_works+0x957/0x15b0 kernel/workqueue.c:2711 #1: ffffc9000fd17d00 (net_cleanup_work){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:2609 [inline] #1: ffffc9000fd17d00 (net_cleanup_work){+.+.}-{0:0}, at: process_scheduled_works+0x957/0x15b0 kernel/workqueue.c:2711 #2: ffffffff8cd35780 (rcu_state.barrier_mutex){+.+.}-{3:3}, at: rcu_barrier+0x4c/0x580 kernel/rcu/tree.c:4089 2 locks held by syz-executor/7333: #0: ffff88802c9d80e0 (&type->s_umount_key#70){+.+.}-{3:3}, at: __super_lock fs/super.c:56 [inline] #0: ffff88802c9d80e0 (&type->s_umount_key#70){+.+.}-{3:3}, at: __super_lock_excl fs/super.c:71 [inline] #0: ffff88802c9d80e0 (&type->s_umount_key#70){+.+.}-{3:3}, at: deactivate_super+0xa4/0xe0 fs/super.c:513 #1: ffffffff8d1478e8 (jfs_log_mutex){+.+.}-{3:3}, at: lmLogClose+0xb4/0x520 fs/jfs/jfs_logmgr.c:1444 2 locks held by syz-executor/7486: #0: ffff88802e8420e0 (&type->s_umount_key#70){+.+.}-{3:3}, at: __super_lock fs/super.c:56 [inline] #0: ffff88802e8420e0 (&type->s_umount_key#70){+.+.}-{3:3}, at: __super_lock_excl fs/super.c:71 [inline] #0: ffff88802e8420e0 (&type->s_umount_key#70){+.+.}-{3:3}, at: deactivate_super+0xa4/0xe0 fs/super.c:513 #1: ffffffff8d1478e8 (jfs_log_mutex){+.+.}-{3:3}, at: lmLogClose+0xb4/0x520 fs/jfs/jfs_logmgr.c:1444 1 lock held by syz-executor/7498: #0: ffff8880252020e0 (&type->s_umount_key#70){+.+.}-{3:3}, at: __super_lock fs/super.c:56 [inline] #0: ffff8880252020e0 (&type->s_umount_key#70){+.+.}-{3:3}, at: __super_lock_excl fs/super.c:71 [inline] #0: ffff8880252020e0 (&type->s_umount_key#70){+.+.}-{3:3}, at: deactivate_super+0xa4/0xe0 fs/super.c:513 2 locks held by syz-executor/7526: #0: ffff888030d320e0 (&type->s_umount_key#70){+.+.}-{3:3}, at: __super_lock fs/super.c:56 [inline] #0: ffff888030d320e0 (&type->s_umount_key#70){+.+.}-{3:3}, at: __super_lock_excl fs/super.c:71 [inline] #0: ffff888030d320e0 (&type->s_umount_key#70){+.+.}-{3:3}, at: deactivate_super+0xa4/0xe0 fs/super.c:513 #1: ffffffff8d1478e8 (jfs_log_mutex){+.+.}-{3:3}, at: lmLogClose+0xb4/0x520 fs/jfs/jfs_logmgr.c:1444 2 locks held by syz-executor/7966: #0: ffff8880573d20e0 (&type->s_umount_key#70){+.+.}-{3:3}, at: __super_lock fs/super.c:56 [inline] #0: ffff8880573d20e0 (&type->s_umount_key#70){+.+.}-{3:3}, at: __super_lock_excl fs/super.c:71 [inline] #0: ffff8880573d20e0 (&type->s_umount_key#70){+.+.}-{3:3}, at: deactivate_super+0xa4/0xe0 fs/super.c:513 #1: ffffffff8d1478e8 (jfs_log_mutex){+.+.}-{3:3}, at: lmLogClose+0xb4/0x520 fs/jfs/jfs_logmgr.c:1444 2 locks held by syz-executor/8023: #0: ffff88805a3980e0 (&type->s_umount_key#70){+.+.}-{3:3}, at: __super_lock fs/super.c:56 [inline] #0: ffff88805a3980e0 (&type->s_umount_key#70){+.+.}-{3:3}, at: __super_lock_excl fs/super.c:71 [inline] #0: ffff88805a3980e0 (&type->s_umount_key#70){+.+.}-{3:3}, at: deactivate_super+0xa4/0xe0 fs/super.c:513 #1: ffffffff8d1478e8 (jfs_log_mutex){+.+.}-{3:3}, at: lmLogClose+0xb4/0x520 fs/jfs/jfs_logmgr.c:1444 1 lock held by syz-executor/8059: #0: ffff88804df140e0 (&type->s_umount_key#70){+.+.}-{3:3}, at: __super_lock fs/super.c:56 [inline] #0: ffff88804df140e0 (&type->s_umount_key#70){+.+.}-{3:3}, at: __super_lock_excl fs/super.c:71 [inline] #0: ffff88804df140e0 (&type->s_umount_key#70){+.+.}-{3:3}, at: deactivate_super+0xa4/0xe0 fs/super.c:513 3 locks held by syz-executor/8279: #0: ffff88802da2ce70 (&hdev->req_lock){+.+.}-{3:3}, at: hci_dev_do_close net/bluetooth/hci_core.c:521 [inline] #0: ffff88802da2ce70 (&hdev->req_lock){+.+.}-{3:3}, at: hci_unregister_dev+0x212/0x510 net/bluetooth/hci_core.c:2709 #1: ffff88802da2c0b8 (&hdev->lock){+.+.}-{3:3}, at: hci_dev_close_sync+0x4c9/0xfb0 net/bluetooth/hci_sync.c:5273 #2: ffffffff8e1296c8 (hci_cb_list_lock){+.+.}-{3:3}, at: hci_disconn_cfm include/net/bluetooth/hci_core.h:2011 [inline] #2: ffffffff8e1296c8 (hci_cb_list_lock){+.+.}-{3:3}, at: hci_conn_hash_flush+0xa1/0x220 net/bluetooth/hci_conn.c:2540 3 locks held by syz-executor/8793: #0: ffff88804a750e70 (&hdev->req_lock){+.+.}-{3:3}, at: hci_dev_do_close net/bluetooth/hci_core.c:521 [inline] #0: ffff88804a750e70 (&hdev->req_lock){+.+.}-{3:3}, at: hci_unregister_dev+0x212/0x510 net/bluetooth/hci_core.c:2709 #1: ffff88804a7500b8 (&hdev->lock){+.+.}-{3:3}, at: hci_dev_close_sync+0x4c9/0xfb0 net/bluetooth/hci_sync.c:5273 #2: ffffffff8e1296c8 (hci_cb_list_lock){+.+.}-{3:3}, at: hci_disconn_cfm include/net/bluetooth/hci_core.h:2011 [inline] #2: ffffffff8e1296c8 (hci_cb_list_lock){+.+.}-{3:3}, at: hci_conn_hash_flush+0xa1/0x220 net/bluetooth/hci_conn.c:2540 3 locks held by syz.1.652/8947: #0: ffff888076760e70 (&hdev->req_lock){+.+.}-{3:3}, at: hci_dev_do_close net/bluetooth/hci_core.c:521 [inline] #0: ffff888076760e70 (&hdev->req_lock){+.+.}-{3:3}, at: hci_unregister_dev+0x212/0x510 net/bluetooth/hci_core.c:2709 #1: ffff8880767600b8 (&hdev->lock){+.+.}-{3:3}, at: hci_dev_close_sync+0x4c9/0xfb0 net/bluetooth/hci_sync.c:5273 #2: ffffffff8e1296c8 (hci_cb_list_lock){+.+.}-{3:3}, at: hci_disconn_cfm include/net/bluetooth/hci_core.h:2011 [inline] #2: ffffffff8e1296c8 (hci_cb_list_lock){+.+.}-{3:3}, at: hci_conn_hash_flush+0xa1/0x220 net/bluetooth/hci_conn.c:2540 5 locks held by syz.3.654/8957: #0: ffff88805b6f8e70 (&hdev->req_lock){+.+.}-{3:3}, at: hci_dev_do_close net/bluetooth/hci_core.c:521 [inline] #0: ffff88805b6f8e70 (&hdev->req_lock){+.+.}-{3:3}, at: hci_unregister_dev+0x212/0x510 net/bluetooth/hci_core.c:2709 #1: ffff88805b6f80b8 (&hdev->lock){+.+.}-{3:3}, at: hci_dev_close_sync+0x4c9/0xfb0 net/bluetooth/hci_sync.c:5273 #2: ffffffff8e1296c8 (hci_cb_list_lock){+.+.}-{3:3}, at: hci_disconn_cfm include/net/bluetooth/hci_core.h:2011 [inline] #2: ffffffff8e1296c8 (hci_cb_list_lock){+.+.}-{3:3}, at: hci_conn_hash_flush+0xa1/0x220 net/bluetooth/hci_conn.c:2540 #3: ffff888025a2d338 (&conn->lock#2){+.+.}-{3:3}, at: l2cap_conn_del+0x70/0x660 net/bluetooth/l2cap_core.c:1763 #4: ffffffff8cd358b8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:324 [inline] #4: ffffffff8cd358b8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x360/0x830 kernel/rcu/tree_exp.h:1004 5 locks held by dhcpcd-run-hook/8996: #0: ffff8880b8e3c018 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0xad/0x140 kernel/sched/core.c:566 #1: ffff8880b8f289c0 (psi_seq){-.-.}-{0:0}, at: psi_sched_switch kernel/sched/stats.h:189 [inline] #1: ffff8880b8f289c0 (psi_seq){-.-.}-{0:0}, at: __schedule+0x20ee/0x44d0 kernel/sched/core.c:6694 #2: ffff888062b34258 (ptlock_ptr(ptdesc)#2){+.+.}-{2:2}, at: spin_lock include/linux/spinlock.h:351 [inline] #2: ffff888062b34258 (ptlock_ptr(ptdesc)#2){+.+.}-{2:2}, at: __pte_offset_map_lock+0x107/0x1e0 mm/pgtable-generic.c:375 #3: ffffffff8cd2fee0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:334 [inline] #3: ffffffff8cd2fee0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:786 [inline] #3: ffffffff8cd2fee0 (rcu_read_lock){....}-{1:2}, at: page_ext_get+0x22/0x2b0 mm/page_ext.c:508 #4: ffff8880b8f289c0 (psi_seq){-.-.}-{0:0}, at: psi_enqueue kernel/sched/stats.h:143 [inline] #4: ffff8880b8f289c0 (psi_seq){-.-.}-{0:0}, at: enqueue_task+0x275/0x2c0 kernel/sched/core.c:2097 ============================================= NMI backtrace for cpu 0 CPU: 0 PID: 29 Comm: khungtaskd Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025 Call Trace: dump_stack_lvl+0x16c/0x230 lib/dump_stack.c:106 nmi_cpu_backtrace+0x39b/0x3d0 lib/nmi_backtrace.c:113 nmi_trigger_cpumask_backtrace+0x17a/0x2f0 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:160 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:222 [inline] watchdog+0xf41/0xf80 kernel/hung_task.c:379 kthread+0x2fa/0x390 kernel/kthread.c:388 ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:152 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:293 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 5910 Comm: kworker/1:4 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025 Workqueue: events free_obj_work RIP: 0010:unwind_next_frame+0x751/0x2970 arch/x86/kernel/unwind_orc.c:515 Code: 24 08 88 18 45 0f b7 37 41 83 e6 0f 4c 89 f7 48 c7 c6 20 e7 b9 8c e8 be ea 4a 00 41 83 fe 05 7f 7b 41 83 fe 03 48 8b 5c 24 30 <0f> 8f e3 00 00 00 41 83 fe 02 0f 84 a3 01 00 00 41 83 fe 03 0f 85 RSP: 0018:ffffc90004d77578 EFLAGS: 00000202 RAX: 0000000000000008 RBX: ffffffff8ecec164 RCX: 0000000000000003 RDX: ffffffff813aba82 RSI: ffffffff8cb9e720 RDI: 0000000000000005 RBP: ffffc90004d77698 R08: ffff88802a343c00 R09: 0000000000000008 R10: 0000000000000009 R11: 0000000000000000 R12: ffffc90004d77648 R13: dffffc0000000000 R14: 0000000000000005 R15: ffffffff8ecec168 FS: 0000000000000000(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f8d2c172368 CR3: 000000007d2d9000 CR4: 00000000003506e0 Call Trace: arch_stack_walk+0x144/0x190 arch/x86/kernel/stacktrace.c:25 stack_trace_save+0x9c/0xe0 kernel/stacktrace.c:122 kasan_save_stack mm/kasan/common.c:45 [inline] kasan_set_track+0x4e/0x70 mm/kasan/common.c:52 kasan_save_free_info+0x2e/0x50 mm/kasan/generic.c:522 ____kasan_slab_free+0x126/0x1e0 mm/kasan/common.c:236 kasan_slab_free include/linux/kasan.h:164 [inline] slab_free_hook mm/slub.c:1811 [inline] slab_free_freelist_hook+0x130/0x1b0 mm/slub.c:1837 slab_free mm/slub.c:3830 [inline] kmem_cache_free+0xf8/0x280 mm/slub.c:3852 free_obj_work+0x414/0x580 lib/debugobjects.c:332 process_one_work kernel/workqueue.c:2634 [inline] process_scheduled_works+0xa45/0x15b0 kernel/workqueue.c:2711 worker_thread+0xa55/0xfc0 kernel/workqueue.c:2792 kthread+0x2fa/0x390 kernel/kthread.c:388 ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:152 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:293