INFO: task kworker/0:9:4598 blocked for more than 143 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/0:9     state:D stack:23168 pid: 4598 ppid:     2 flags:0x00004000
Workqueue: gfs_recovery gfs2_recover_func
Call Trace:
 <TASK>
 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
 wait_on_page_bit_common+0x8bf/0xeb0 mm/filemap.c:1356
 wait_on_page_locked include/linux/pagemap.h:688 [inline]
 gfs2_jhead_process_page+0x252/0xbf0 fs/gfs2/lops.c:476
 gfs2_find_jhead+0xdaf/0xf00 fs/gfs2/lops.c:597
 gfs2_recover_func+0x73a/0x1cd0 fs/gfs2/recovery.c:462
 process_one_work+0x867/0xff0 kernel/workqueue.c:2310
 worker_thread+0xad7/0x12a0 kernel/workqueue.c:2457
 kthread+0x42e/0x520 kernel/kthread.c:334
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287
 </TASK>
INFO: task syz.4.491:6821 blocked for more than 144 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.4.491       state:D stack:24272 pid: 6821 ppid:  4189 flags:0x00004204
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5049 [inline]
 __schedule+0x11c3/0x4350 kernel/sched/core.c:6395
 schedule+0x11b/0x1e0 kernel/sched/core.c:6478
 bit_wait+0xd/0xc0 kernel/sched/wait_bit.c:199
 __wait_on_bit kernel/sched/wait_bit.c:49 [inline]
 out_of_line_wait_on_bit+0x173/0x230 kernel/sched/wait_bit.c:64
 wait_on_bit include/linux/wait_bit.h:76 [inline]
 gfs2_recover_journal+0x104/0x150 fs/gfs2/recovery.c:579
 init_journal+0x17fa/0x22d0 fs/gfs2/ops_fstype.c:837
 init_inodes+0xdb/0x320 fs/gfs2/ops_fstype.c:891
 gfs2_fill_super+0x1671/0x1ea0 fs/gfs2/ops_fstype.c:1249
 get_tree_bdev+0x3e6/0x610 fs/super.c:1336
 gfs2_get_tree+0x4d/0x1e0 fs/gfs2/ops_fstype.c:1332
 vfs_get_tree+0x88/0x270 fs/super.c:1541
 do_new_mount+0x247/0xa50 fs/namespace.c:3060
 do_mount fs/namespace.c:3431 [inline]
 __do_sys_mount fs/namespace.c:3639 [inline]
 __se_sys_mount+0x2e3/0x3d0 fs/namespace.c:3616
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7f7633d3fd8a
RSP: 002b:00007f7631f94e58 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f7631f94ee0 RCX: 00007f7633d3fd8a
RDX: 0000200000000500 RSI: 0000200000002440 RDI: 00007f7631f94ea0
RBP: 0000200000000500 R08: 00007f7631f94ee0 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000200000002440
R13: 00007f7631f94ea0 R14: 0000000000037f98 R15: 0000200000000100
 </TASK>

Showing all locks held in the system:
2 locks held by kworker/u4:0/9:
1 lock held by ksoftirqd/0/14:
 #0: ffff8880b8e3a358 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x25/0x130 kernel/sched/core.c:475
1 lock held by khungtaskd/27:
 #0: ffffffff8d11efa0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30
2 locks held by getty/3943:
 #0: ffff88802cbcc098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x21/0x70 drivers/tty/tty_ldisc.c:252
 #1: ffffc900025e62e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x594/0x1a50 drivers/tty/n_tty.c:2158
2 locks held by syz-executor/4194:
 #0: ffff88804f6b20e0 (&type->s_umount_key#50){+.+.}-{3:3}, at: deactivate_super+0xa0/0xd0 fs/super.c:365
 #1: ffffffff8d123a28 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:290 [inline]
 #1: ffffffff8d123a28 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x2d1/0x750 kernel/rcu/tree_exp.h:845
2 locks held by kworker/u5:7/4205:
 #0: ffff888021563938 ((wq_completion)nbd0-recv){+.+.}-{0:0}, at: process_one_work+0x75c/0xff0 kernel/workqueue.c:-1
 #1: ffffc9000302fd00 ((work_completion)(&args->work)){+.+.}-{0:0}, at: process_one_work+0x79e/0xff0 kernel/workqueue.c:2285
2 locks held by kworker/0:9/4598:
 #0: ffff88814669c538 ((wq_completion)gfs_recovery){+.+.}-{0:0}, at: process_one_work+0x75c/0xff0 kernel/workqueue.c:-1
 #1: ffffc9000358fd00 ((work_completion)(&jd->jd_work)){+.+.}-{0:0}, at: process_one_work+0x79e/0xff0 kernel/workqueue.c:2285
2 locks held by kworker/0:20/4692:
 #0: ffff888017872138 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: process_one_work+0x75c/0xff0 kernel/workqueue.c:-1
 #1: ffffc900035ffd00 ((work_completion)(&rew.rew_work)){+.+.}-{0:0}, at: process_one_work+0x79e/0xff0 kernel/workqueue.c:2285
1 lock held by syz.4.491/6821:
 #0: ffff88807bc560e0 (&type->s_umount_key#98/1){+.+.}-{3:3}, at: alloc_super+0x200/0x970 fs/super.c:229
1 lock held by syz.7.620/7682:
 #0: ffff88807bc560e0 (&type->s_umount_key#122){.+.+}-{3:3}, at: iterate_supers+0xa4/0x1d0 fs/super.c:716
1 lock held by syz-executor/7988:
3 locks held by syz.9.1064/10343:
 #0: ffff8880704b7410 (&sb->s_type->i_mutex_key#11){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:793 [inline]
 #0: ffff8880704b7410 (&sb->s_type->i_mutex_key#11){+.+.}-{3:3}, at: __sock_release net/socket.c:650 [inline]
 #0: ffff8880704b7410 (&sb->s_type->i_mutex_key#11){+.+.}-{3:3}, at: sock_close+0x82/0x210 net/socket.c:1346
 #1: ffff88802083e120 (sk_lock-AF_CAN){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1744 [inline]
 #1: ffff88802083e120 (sk_lock-AF_CAN){+.+.}-{0:0}, at: bcm_release+0x213/0x920 net/can/bcm.c:1882
 #2: ffffffff8d123a28 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:322 [inline]
 #2: ffffffff8d123a28 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x3a5/0x750 kernel/rcu/tree_exp.h:845
1 lock held by dhcpcd-run-hook/10393:

=============================================

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 10/15/2026
Call Trace:
 <TASK>
 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
 </TASK>
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 10404 Comm: dhcpcd-run-hook Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/15/2026
RIP: 0010:check_wait_context kernel/locking/lockdep.c:4782 [inline]
RIP: 0010:__lock_acquire+0xadb/0x7d40 kernel/locking/lockdep.c:5070
Code: 0f b6 cd 44 0f b6 e8 38 c1 44 0f 42 e9 48 8b 44 24 68 42 0f b6 04 00 84 c0 0f 85 e0 00 00 00 48 ff c3 48 8b 44 24 28 48 63 00 <49> 83 c4 28 49 83 c7 28 48 39 c3 0f 8c 11 ff ff ff e9 4b 01 00 00
RSP: 0018:ffffc9000310f1e0 EFLAGS: 00000002
RAX: 0000000000000002 RBX: 0000000000000001 RCX: 0000000000000004
RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffffff91047100
RBP: ffffc9000310f428 R08: dffffc0000000000 R09: 1ffffffff2208e20
R10: dffffc0000000000 R11: fffffbfff2208e21 R12: ffff88802a0b8b10
R13: 0000000000000003 R14: ffffffff909c9d48 R15: ffff88802a0b8b10
FS:  0000000000000000(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f0a40a3a286 CR3: 0000000053e56000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 lock_acquire+0x19f/0x400 kernel/locking/lockdep.c:5737
 __raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline]
 _raw_spin_lock+0x2a/0x40 kernel/locking/spinlock.c:154
 spin_lock include/linux/spinlock.h:364 [inline]
 zap_pte_range mm/memory.c:1342 [inline]
 zap_pmd_range mm/memory.c:1505 [inline]
 zap_pud_range mm/memory.c:1534 [inline]
 zap_p4d_range mm/memory.c:1555 [inline]
 unmap_page_range+0x928/0x2410 mm/memory.c:1576
 unmap_vmas+0x131/0x250 mm/memory.c:1653
 exit_mmap+0x3b9/0x640 mm/mmap.c:3224
 __mmput+0x115/0x390 kernel/fork.c:1136
 exec_mmap+0x50f/0x600 fs/exec.c:1035
 begin_new_exec+0x81f/0x1180 fs/exec.c:1307
 load_elf_binary+0x9af/0x2910 fs/binfmt_elf.c:1001
 search_binary_handler fs/exec.c:1748 [inline]
 exec_binprm fs/exec.c:1789 [inline]
 bprm_execve+0xa8d/0x1740 fs/exec.c:1858
 do_execveat_common+0x504/0x6b0 fs/exec.c:1963
 do_execve fs/exec.c:2033 [inline]
 __do_sys_execve fs/exec.c:2109 [inline]
 __se_sys_execve fs/exec.c:2104 [inline]
 __x64_sys_execve+0x8e/0xa0 fs/exec.c:2104
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7f0a40980107
Code: Unable to access opcode bytes at RIP 0x7f0a409800dd.
RSP: 002b:00007ffed0e9db48 EFLAGS: 00000246 ORIG_RAX: 000000000000003b
RAX: ffffffffffffffda RBX: 000055ba0f6d80c8 RCX: 00007f0a40980107
RDX: 000055ba0f6d80e8 RSI: 000055ba0f6d80c8 RDI: 000055ba0f6d8170
RBP: 000055ba0f6d8170 R08: 00007ffed0ea1e26 R09: 0000000000000000
R10: 0000000000000008 R11: 0000000000000246 R12: 000055ba0f6d80e8
R13: 00007f0a40b45e8b R14: 000055ba0f6d80e8 R15: 0000000000000000
 </TASK>