INFO: task syz-executor:5852 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:22040 pid:5852 tgid:5852 ppid:1 task_flags:0x400140 flags:0x00080002
Call Trace:
context_switch kernel/sched/core.c:5354 [inline]
__schedule+0x165c/0x5520 kernel/sched/core.c:6966
__schedule_loop kernel/sched/core.c:7049 [inline]
schedule+0x164/0x360 kernel/sched/core.c:7064
bit_wait+0x11/0xd0 kernel/sched/wait_bit.c:240
__wait_on_bit+0xb9/0x310 kernel/sched/wait_bit.c:52
out_of_line_wait_on_bit+0x13b/0x190 kernel/sched/wait_bit.c:67
wait_on_bit include/linux/wait_bit.h:77 [inline]
gfs2_glock_wait+0xbd/0x2a0 fs/gfs2/glock.c:1268
gfs2_glock_nq_init fs/gfs2/glock.h:253 [inline]
__gfs2_lookup+0x134/0x2a0 fs/gfs2/inode.c:998
__lookup_slow+0x2b7/0x410 fs/namei.c:1915
lookup_slow+0x53/0x70 fs/namei.c:1932
walk_component fs/namei.c:2278 [inline]
lookup_last fs/namei.c:2785 [inline]
path_lookupat+0x3f5/0x8c0 fs/namei.c:2809
filename_lookup+0x256/0x5d0 fs/namei.c:2838
user_path_at+0x40/0x160 fs/namei.c:3643
ksys_umount fs/namespace.c:2062 [inline]
__do_sys_umount fs/namespace.c:2070 [inline]
__se_sys_umount fs/namespace.c:2068 [inline]
__x64_sys_umount+0xf6/0x170 fs/namespace.c:2068
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0x15f/0xf80 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f303e99da57
RSP: 002b:00007fff76de9d88 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: ffffffffffffffda RBX: 00007f303ea32048 RCX: 00007f303e99da57
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007fff76de9e40
RBP: 00007fff76de9e40 R08: 0000000000000000 R09: 00000000ffffffff
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fff76deaf30
R13: 00007f303ea32048 R14: 0000000000066420 R15: 00007fff76ded0f0
Showing all locks held in the system:
1 lock held by khungtaskd/30:
#0: ffffffff8e95d260 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:312 [inline]
#0: ffffffff8e95d260 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:850 [inline]
#0: ffffffff8e95d260 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180 kernel/locking/lockdep.c:6775
2 locks held by dhcpcd/5506:
2 locks held by getty/5601:
#0: ffff888033c460a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
#1: ffffc9000322b2e8 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x45c/0x13a0 drivers/tty/n_tty.c:2211
1 lock held by syz-executor/5852:
#0: ffff88805739c150 (&type->i_mutex_dir_key#26){++++}-{4:4}, at: inode_lock_shared include/linux/fs.h:1044 [inline]
#0: ffff88805739c150 (&type->i_mutex_dir_key#26){++++}-{4:4}, at: lookup_slow+0x46/0x70 fs/namei.c:1931
1 lock held by udevd/6069:
1 lock held by syz-executor/12117:
4 locks held by syz.0.1584/13220:
#0: ffff888059914410 (sb_writers#21){.+.+}-{0:0}, at: ioctl_file_clone fs/ioctl.c:239 [inline]
#0: ffff888059914410 (sb_writers#21){.+.+}-{0:0}, at: ioctl_file_clone_range fs/ioctl.c:257 [inline]
#0: ffff888059914410 (sb_writers#21){.+.+}-{0:0}, at: do_vfs_ioctl+0xe0f/0x1530 fs/ioctl.c:544
#1: ffff8880589e7148 (&sb->s_type->i_mutex_key#41){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:1029 [inline]
#1: ffff8880589e7148 (&sb->s_type->i_mutex_key#41){+.+.}-{4:4}, at: btrfs_inode_lock+0x51/0xe0 fs/btrfs/inode.c:368
#2: ffff8880589e6fe0 (&ei->i_mmap_lock){+.+.}-{4:4}, at: btrfs_inode_lock+0xcb/0xe0 fs/btrfs/inode.c:371
#3: ffff8880b863ae60 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0xb6/0x150 kernel/sched/core.c:655
2 locks held by dhcpcd/13273:
#0: ffff888052107440 (&sb->s_type->i_mutex_key#13){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:1029 [inline]
#0: ffff888052107440 (&sb->s_type->i_mutex_key#13){+.+.}-{4:4}, at: __sock_release net/socket.c:720 [inline]
#0: ffff888052107440 (&sb->s_type->i_mutex_key#13){+.+.}-{4:4}, at: sock_close+0x9b/0x240 net/socket.c:1513
#1: ffffffff8e963568 (rcu_state.exp_mutex){+.+.}-{4:4}, at: exp_funnel_lock kernel/rcu/tree_exp.h:311 [inline]
#1: ffffffff8e963568 (rcu_state.exp_mutex){+.+.}-{4:4}, at: synchronize_rcu_expedited+0x2d0/0x770 kernel/rcu/tree_exp.h:961
2 locks held by dhcpcd/13274:
#0: ffff888078d78260 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1713 [inline]
#0: ffff888078d78260 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: packet_do_bind+0x33/0xe10 net/packet/af_packet.c:3198
#1: ffffffff8e963568 (rcu_state.exp_mutex){+.+.}-{4:4}, at: exp_funnel_lock kernel/rcu/tree_exp.h:343 [inline]
#1: ffffffff8e963568 (rcu_state.exp_mutex){+.+.}-{4:4}, at: synchronize_rcu_expedited+0x38d/0x770 kernel/rcu/tree_exp.h:961
1 lock held by dhcpcd/13279:
#0: ffff888025394260 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1713 [inline]
#0: ffff888025394260 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: packet_do_bind+0x33/0xe10 net/packet/af_packet.c:3198
1 lock held by udevadm/13280:
8 locks held by dhcpcd-run-hook/13282:
=============================================
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 30 Comm: khungtaskd Not tainted syzkaller #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026
Call Trace:
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:162 [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:353 [inline]
watchdog+0xfd3/0x1030 kernel/hung_task.c:561
kthread+0x388/0x470 kernel/kthread.c:436
ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 13280 Comm: udevadm Not tainted syzkaller #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026
RIP: 0010:__lock_unpin_lock kernel/locking/lockdep.c:5675 [inline]
RIP: 0010:lock_unpin_lock+0xcd/0x170 kernel/locking/lockdep.c:5997
Code: 11 48 c7 c7 30 b9 82 8e 4c 89 e6 e8 cd c0 49 03 eb cb 48 8d 3d 84 b5 92 0e 67 48 0f b9 3a eb 10 41 8b 47 24 85 c0 74 76 29 d8 <41> 89 47 24 78 7c 48 c7 c7 fb 58 23 8e e8 01 07 0d 0a b8 ff ff ff
RSP: 0018:ffffc90003337648 EFLAGS: 00000046
RAX: 0000000000000000 RBX: 000000000000c231 RCX: 0000000080000002
RDX: 0000000000000001 RSI: ffff8880b863ae60 RDI: ffff88807e7ee6d0
RBP: ffff88807e7edb80 R08: ffff88807a372ed3 R09: 1ffff1100f46e5da
R10: dffffc0000000000 R11: ffffed100f46e5db R12: 0000000000000000
R13: 0000000000000046 R14: ffff8880b863ae60 R15: ffff88807e7ee6d0
FS: 00007f0991547880(0000) GS:ffff88812525c000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000563cb9df04b0 CR3: 0000000076f86000 CR4: 00000000003526f0
Call Trace:
rq_unpin_lock kernel/sched/sched.h:1895 [inline]
prepare_lock_switch kernel/sched/core.c:5067 [inline]
context_switch kernel/sched/core.c:5351 [inline]
__schedule+0x15dc/0x5520 kernel/sched/core.c:6966
preempt_schedule_irq+0x4d/0xa0 kernel/sched/core.c:7294
irqentry_exit+0x5e4/0x700 kernel/entry/common.c:240
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697
RIP: 0010:lock_release+0x2d7/0x3c0 kernel/locking/lockdep.c:5893
Code: 32 9a 11 00 00 00 00 eb b5 e8 c5 f0 0c 0a f7 c3 00 02 00 00 74 b9 65 48 8b 05 85 ec 99 11 48 3b 44 24 28 75 44 fb 48 83 c4 30 <5b> 41 5c 41 5d 41 5e 41 5f 5d c3 cc cc cc cc cc 48 8d 3d 72 ba 92
RSP: 0018:ffffc900033379c8 EFLAGS: 00000282
RAX: 159974936f7de700 RBX: 0000000000000202 RCX: 0000000000000046
RDX: 0000000000000000 RSI: ffffffff8e2358fb RDI: ffffffff8c287de0
RBP: ffff88807e7ee6d0 R08: ffffffff846b05e2 R09: ffffffff8e95d260
R10: dffffc0000000000 R11: ffffed1006c91304 R12: 0000000000000000
R13: 0000000000000000 R14: ffffffff8e95d260 R15: ffff88807e7edb80
rcu_lock_release include/linux/rcupdate.h:322 [inline]
rcu_read_unlock include/linux/rcupdate.h:881 [inline]
aa_file_perm+0x509/0x15e0 security/apparmor/file.c:652
common_file_perm security/apparmor/lsm.c:529 [inline]
apparmor_file_permission+0x14d/0x300 security/apparmor/lsm.c:542
security_file_permission+0x8d/0x260 security/security.c:2367
rw_verify_area+0xbb/0x4d0 fs/read_write.c:475
vfs_read+0x160/0xa70 fs/read_write.c:565
ksys_read+0x150/0x270 fs/read_write.c:717
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0x15f/0xf80 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f0990ea7407
Code: Unable to access opcode bytes at 0x7f0990ea73dd.
RSP: 002b:00007ffe579c7ad0 EFLAGS: 00000202 ORIG_RAX: 0000000000000000
RAX: ffffffffffffffda RBX: 00007f0991547880 RCX: 00007f0990ea7407
RDX: 0000000000001000 RSI: 0000558a519e8e50 RDI: 0000000000000005
RBP: 00007f0990fefff0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000202 R12: 000000000000000a
R13: 00007f0990fefea0 R14: 0000558a519e8e75 R15: 0000558a519d62a0