INFO: task syz-executor:16158 blocked for more than 143 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor    state:D stack:22688 pid:16158 tgid:16158 ppid:1      task_flags:0x400140 flags:0x00080002
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5298 [inline]
 __schedule+0x1553/0x5240 kernel/sched/core.c:6911
 __schedule_loop kernel/sched/core.c:6993 [inline]
 rt_mutex_schedule+0x76/0xf0 kernel/sched/core.c:7289
 rt_mutex_slowlock_block+0x508/0x680 kernel/locking/rtmutex.c:1647
 __rt_mutex_slowlock kernel/locking/rtmutex.c:1721 [inline]
 __rt_mutex_slowlock_locked kernel/locking/rtmutex.c:1760 [inline]
 rt_mutex_slowlock+0x2dc/0x7b0 kernel/locking/rtmutex.c:1800
 __rt_mutex_lock kernel/locking/rtmutex.c:1815 [inline]
 __mutex_lock_common kernel/locking/rtmutex_api.c:534 [inline]
 mutex_lock_nested+0x168/0x1d0 kernel/locking/rtmutex_api.c:552
 lmLogClose+0xb4/0x520 fs/jfs/jfs_logmgr.c:1443
 jfs_umount+0x2ef/0x3c0 fs/jfs/jfs_umount.c:114
 jfs_put_super+0x8c/0x190 fs/jfs/super.c:194
 generic_shutdown_super+0x13d/0x2d0 fs/super.c:646
 kill_block_super+0x44/0x90 fs/super.c:1725
 deactivate_locked_super+0xbc/0x130 fs/super.c:476
 cleanup_mnt+0x437/0x4d0 fs/namespace.c:1312
 task_work_run+0x1d9/0x270 kernel/task_work.c:233
 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
 __exit_to_user_mode_loop kernel/entry/common.c:67 [inline]
 exit_to_user_mode_loop+0xed/0x480 kernel/entry/common.c:98
 __exit_to_user_mode_prepare include/linux/irq-entry-common.h:226 [inline]
 syscall_exit_to_user_mode_prepare include/linux/irq-entry-common.h:256 [inline]
 syscall_exit_to_user_mode include/linux/entry-common.h:325 [inline]
 do_syscall_64+0x32d/0xf80 arch/x86/entry/syscall_64.c:100
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fe8b207da57
RSP: 002b:00007fff2c5fbc08 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 00007fe8b2112048 RCX: 00007fe8b207da57
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007fff2c5fbcc0
RBP: 00007fff2c5fbcc0 R08: 00007fff2c5fccc0 R09: 00000000ffffffff
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fff2c5fcd50
R13: 00007fe8b2112048 R14: 00000000000eeff9 R15: 00007fff2c5fcd90
 </TASK>

Showing all locks held in the system:
4 locks held by kworker/u8:1/13:
1 lock held by khungtaskd/38:
 #0: ffffffff8ddcb9c0 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:312 [inline]
 #0: ffffffff8ddcb9c0 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:850 [inline]
 #0: ffffffff8ddcb9c0 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180 kernel/locking/lockdep.c:6775
3 locks held by kworker/u8:2/43:
 #0: ffff888019c44138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3251 [inline]
 #0: ffff888019c44138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_scheduled_works+0xa52/0x18c0 kernel/workqueue.c:3359
 #1: ffffc90000b47c40 ((linkwatch_work).work){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3252 [inline]
 #1: ffffc90000b47c40 ((linkwatch_work).work){+.+.}-{0:0}, at: process_scheduled_works+0xa8d/0x18c0 kernel/workqueue.c:3359
 #2: ffffffff8f15d1b8 (rtnl_mutex){+.+.}-{4:4}, at: linkwatch_event+0xe/0x60 net/core/link_watch.c:313
1 lock held by dhcpcd/5463:
2 locks held by getty/5562:
 #0: ffff8880372b00a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
 #1: ffffc90003e762e0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x462/0x13c0 drivers/tty/n_tty.c:2211
3 locks held by kworker/0:4/5868:
2 locks held by syz-executor/14028:
2 locks held by syz-executor/15383:
 #0: ffff88805ae2a0d0 (&type->s_umount_key#84){++++}-{4:4}, at: __super_lock fs/super.c:58 [inline]
 #0: ffff88805ae2a0d0 (&type->s_umount_key#84){++++}-{4:4}, at: __super_lock_excl fs/super.c:73 [inline]
 #0: ffff88805ae2a0d0 (&type->s_umount_key#84){++++}-{4:4}, at: deactivate_super+0xa9/0xe0 fs/super.c:508
 #1: ffffffff8e24e6b8 (jfs_log_mutex){+.+.}-{4:4}, at: lmLogClose+0xb4/0x520 fs/jfs/jfs_logmgr.c:1443
2 locks held by syz-executor/15474:
 #0: ffff88802a9be0d0 (&type->s_umount_key#84){++++}-{4:4}, at: __super_lock fs/super.c:58 [inline]
 #0: ffff88802a9be0d0 (&type->s_umount_key#84){++++}-{4:4}, at: __super_lock_excl fs/super.c:73 [inline]
 #0: ffff88802a9be0d0 (&type->s_umount_key#84){++++}-{4:4}, at: deactivate_super+0xa9/0xe0 fs/super.c:508
 #1: ffffffff8e24e6b8 (jfs_log_mutex){+.+.}-{4:4}, at: lmLogClose+0xb4/0x520 fs/jfs/jfs_logmgr.c:1443
2 locks held by syz-executor/16111:
 #0: ffff88803b81e0d0 (&type->s_umount_key#84){++++}-{4:4}, at: __super_lock fs/super.c:58 [inline]
 #0: ffff88803b81e0d0 (&type->s_umount_key#84){++++}-{4:4}, at: __super_lock_excl fs/super.c:73 [inline]
 #0: ffff88803b81e0d0 (&type->s_umount_key#84){++++}-{4:4}, at: deactivate_super+0xa9/0xe0 fs/super.c:508
 #1: ffffffff8e24e6b8 (jfs_log_mutex){+.+.}-{4:4}, at: lmLogClose+0xb4/0x520 fs/jfs/jfs_logmgr.c:1443
2 locks held by syz-executor/16158:
 #0: ffff8880409e80d0 (&type->s_umount_key#84){++++}-{4:4}, at: __super_lock fs/super.c:58 [inline]
 #0: ffff8880409e80d0 (&type->s_umount_key#84){++++}-{4:4}, at: __super_lock_excl fs/super.c:73 [inline]
 #0: ffff8880409e80d0 (&type->s_umount_key#84){++++}-{4:4}, at: deactivate_super+0xa9/0xe0 fs/super.c:508
 #1: ffffffff8e24e6b8 (jfs_log_mutex){+.+.}-{4:4}, at: lmLogClose+0xb4/0x520 fs/jfs/jfs_logmgr.c:1443
2 locks held by syz-executor/16576:
 #0: ffff88805641e0d0 (&type->s_umount_key#84){++++}-{4:4}, at: __super_lock fs/super.c:58 [inline]
 #0: ffff88805641e0d0 (&type->s_umount_key#84){++++}-{4:4}, at: __super_lock_excl fs/super.c:73 [inline]
 #0: ffff88805641e0d0 (&type->s_umount_key#84){++++}-{4:4}, at: deactivate_super+0xa9/0xe0 fs/super.c:508
 #1: ffffffff8e24e6b8 (jfs_log_mutex){+.+.}-{4:4}, at: lmLogClose+0xb4/0x520 fs/jfs/jfs_logmgr.c:1443
2 locks held by syz-executor/16880:
 #0: ffff888029d3e0d0 (&type->s_umount_key#84){++++}-{4:4}, at: __super_lock fs/super.c:58 [inline]
 #0: ffff888029d3e0d0 (&type->s_umount_key#84){++++}-{4:4}, at: __super_lock_excl fs/super.c:73 [inline]
 #0: ffff888029d3e0d0 (&type->s_umount_key#84){++++}-{4:4}, at: deactivate_super+0xa9/0xe0 fs/super.c:508
 #1: ffffffff8e24e6b8 (jfs_log_mutex){+.+.}-{4:4}, at: lmLogClose+0xb4/0x520 fs/jfs/jfs_logmgr.c:1443
1 lock held by syz.9.1244/17511:
 #0: ffff88805f2060d0 (&type->s_umount_key#56){++++}-{4:4}, at: __super_lock fs/super.c:60 [inline]
 #0: ffff88805f2060d0 (&type->s_umount_key#56){++++}-{4:4}, at: super_lock+0x2d6/0x3d0 fs/super.c:122
1 lock held by syz.5.1250/17561:
 #0: ffff88805f2060d0 (&type->s_umount_key#56){++++}-{4:4}, at: __super_lock fs/super.c:60 [inline]
 #0: ffff88805f2060d0 (&type->s_umount_key#56){++++}-{4:4}, at: super_lock+0x2d6/0x3d0 fs/super.c:122
1 lock held by syz.0.1266/17966:
 #0: ffff88805ae2a0d0 (&type->s_umount_key#84){++++}-{4:4}, at: __super_lock fs/super.c:60 [inline]
 #0: ffff88805ae2a0d0 (&type->s_umount_key#84){++++}-{4:4}, at: super_lock+0x2d6/0x3d0 fs/super.c:122
1 lock held by syz.4.1308/18023:
 #0: ffff88802a9be0d0 (&type->s_umount_key#84){++++}-{4:4}, at: __super_lock fs/super.c:60 [inline]
 #0: ffff88802a9be0d0 (&type->s_umount_key#84){++++}-{4:4}, at: super_lock+0x2d6/0x3d0 fs/super.c:122
8 locks held by syz-executor/18075:
3 locks held by syz.8.1327/18091:
4 locks held by syz.1.1328/18093:
4 locks held by syz.3.1331/18099:

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

NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 38 Comm: khungtaskd Not tainted syzkaller #0 PREEMPT_{RT,(full)} 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026
Call Trace:
 <TASK>
 dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120
 nmi_cpu_backtrace+0x274/0x2d0 lib/nmi_backtrace.c:113
 nmi_trigger_cpumask_backtrace+0x17a/0x300 lib/nmi_backtrace.c:62
 trigger_all_cpu_backtrace include/linux/nmi.h:161 [inline]
 __sys_info lib/sys_info.c:157 [inline]
 sys_info+0x135/0x170 lib/sys_info.c:165
 check_hung_uninterruptible_tasks kernel/hung_task.c:346 [inline]
 watchdog+0xfd9/0x1030 kernel/hung_task.c:515
 kthread+0x388/0x470 kernel/kthread.c:436
 ret_from_fork+0x51e/0xb90 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 5464 Comm: dhcpcd Not tainted syzkaller #0 PREEMPT_{RT,(full)} 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026
RIP: 0010:__sanitizer_cov_trace_switch+0x12c/0x140 kernel/kcov.c:-1
Code: 3b 4a 89 4c 33 08 4e 89 5c 33 10 4a 89 7c 33 18 4a 89 54 33 20 e9 6e ff ff ff 5b 41 5c 41 5d 41 5e 41 5f 5d c3 cc cc cc cc cc <b9> 05 00 00 00 48 85 c0 0f 85 2e ff ff ff c3 cc cc cc cc cc 90 90
RSP: 0018:ffffc9000423f5b8 EFLAGS: 00000246
RAX: 0000000000000003 RBX: ffffc9000423f8c0 RCX: 0000000000000003
RDX: 0000000000000000 RSI: ffffffff8f517570 RDI: 0000000000000003
RBP: dffffc0000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000100 R11: 0000000000000003 R12: ffff8880295a7000
R13: 000055602c3cd000 R14: 0000000000000000 R15: 0000000000000003
FS:  00007feed6fa5780(0000) GS:ffff888126332000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffd7488d310 CR3: 000000003e2ca000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 ma_pivots lib/maple_tree.c:602 [inline]
 mas_next_node+0x11f/0xd70 lib/maple_tree.c:4284
 mas_next_slot+0x407/0xd00 lib/maple_tree.c:4389
 mas_find+0xb0e/0xd30 lib/maple_tree.c:5622
 vma_next include/linux/mm.h:1323 [inline]
 dup_mmap+0xfbe/0x1d50 mm/mmap.c:1763
 dup_mm kernel/fork.c:1531 [inline]
 copy_mm+0x13b/0x4a0 kernel/fork.c:1583
 copy_process+0x18be/0x3cd0 kernel/fork.c:2223
 kernel_clone+0x249/0x840 kernel/fork.c:2653
 __do_sys_clone kernel/fork.c:2794 [inline]
 __se_sys_clone kernel/fork.c:2778 [inline]
 __x64_sys_clone+0x1b6/0x230 kernel/fork.c:2778
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x14d/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7feed7079636
Code: 89 df e8 6d e8 f6 ff 45 31 c0 31 d2 31 f6 64 48 8b 04 25 10 00 00 00 bf 11 00 20 01 4c 8d 90 d0 02 00 00 b8 38 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 52 89 c5 85 c0 75 31 64 48 8b 04 25 10 00 00
RSP: 002b:00007ffd7486ca20 EFLAGS: 00000246 ORIG_RAX: 0000000000000038
RAX: ffffffffffffffda RBX: 00007ffd7486ca28 RCX: 00007feed7079636
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011
RBP: 00007ffd7488cf70 R08: 0000000000000000 R09: 0000000000000001
R10: 00007feed6fa5a50 R11: 0000000000000246 R12: 00007ffd7486cb60
R13: 0000000000000000 R14: 0000000000000000 R15: 000055601efa3ac0
 </TASK>