INFO: task syz.3.343:7625 blocked for more than 144 seconds.
Not tainted 6.13.0-rc3-next-20241220-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.3.343 state:D stack:25952 pid:7625 tgid:7614 ppid:5844 flags:0x00000004
Call Trace:
context_switch kernel/sched/core.c:5371 [inline]
__schedule+0x189f/0x4c80 kernel/sched/core.c:6758
__schedule_loop kernel/sched/core.c:6835 [inline]
schedule+0x14b/0x320 kernel/sched/core.c:6850
d_wait_lookup fs/dcache.c:2477 [inline]
d_alloc_parallel+0xc16/0x1600 fs/dcache.c:2559
__lookup_slow+0x117/0x3f0 fs/namei.c:1776
lookup_slow+0x53/0x70 fs/namei.c:1808
walk_component+0x2e1/0x410 fs/namei.c:2112
lookup_last fs/namei.c:2610 [inline]
path_lookupat+0x16f/0x450 fs/namei.c:2634
filename_lookup+0x2a3/0x670 fs/namei.c:2663
filename_listxattr fs/xattr.c:955 [inline]
path_listxattrat+0x147/0x410 fs/xattr.c:988
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f0228f85d29
RSP: 002b:00007f0229d6e038 EFLAGS: 00000246 ORIG_RAX: 00000000000000c3
RAX: ffffffffffffffda RBX: 00007f0229176080 RCX: 00007f0228f85d29
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000040
RBP: 00007f0229001b08 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f0229176080 R15: 00007ffd94313a28
Showing all locks held in the system:
1 lock held by khungtaskd/30:
#0: ffffffff8e937da0 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:337 [inline]
#0: ffffffff8e937da0 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
#0: ffffffff8e937da0 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6744
1 lock held by udevd/5207:
2 locks held by getty/5590:
#0: ffff8880319a60a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
#1: ffffc90002fde2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x6a6/0x1e00 drivers/tty/n_tty.c:2211
2 locks held by syz-executor/5829:
#0: ffffffff8f05e928 (bio_slab_lock){+.+.}-{4:4}, at: bio_put_slab block/bio.c:140 [inline]
#0: ffffffff8f05e928 (bio_slab_lock){+.+.}-{4:4}, at: bioset_exit+0x42f/0x650 block/bio.c:1755
#1: ffffffff8e93d140 (rcu_state.barrier_mutex){+.+.}-{4:4}, at: rcu_barrier+0x4c/0x530 kernel/rcu/tree.c:3741
5 locks held by kworker/1:4/5883:
1 lock held by syz-executor/7263:
#0: ffff88801c7e00e0 (&type->s_umount_key#93){++++}-{4:4}, at: __super_lock fs/super.c:56 [inline]
#0: ffff88801c7e00e0 (&type->s_umount_key#93){++++}-{4:4}, at: __super_lock_excl fs/super.c:71 [inline]
#0: ffff88801c7e00e0 (&type->s_umount_key#93){++++}-{4:4}, at: deactivate_super+0xb5/0xf0 fs/super.c:505
1 lock held by syz.3.343/7617:
1 lock held by syz.3.343/7625:
#0: ffff888078370180 (&type->i_mutex_dir_key#23){.+.+}-{4:4}, at: inode_lock_shared include/linux/fs.h:873 [inline]
#0: ffff888078370180 (&type->i_mutex_dir_key#23){.+.+}-{4:4}, at: lookup_slow+0x45/0x70 fs/namei.c:1807
3 locks held by dhcpcd-run-hook/9607:
=============================================
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 30 Comm: khungtaskd Not tainted 6.13.0-rc3-next-20241220-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
Call Trace:
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120
nmi_cpu_backtrace+0x49c/0x4d0 lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0x198/0x320 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:162 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:234 [inline]
watchdog+0xff6/0x1040 kernel/hung_task.c:397
kthread+0x7a9/0x920 kernel/kthread.c:464
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:148
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 5851 Comm: udevd Not tainted 6.13.0-rc3-next-20241220-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
RIP: 0010:mark_lock+0x136/0x360
Code: 9b 0a 8c e8 2c e4 e4 ff 90 0f 0b 90 90 90 31 db 48 83 c3 60 48 89 d8 48 c1 e8 03 42 80 3c 28 00 74 08 48 89 df e8 9a 9b 8a 00 <41> bc 01 00 00 00 44 85 33 74 16 44 89 e0 48 83 c4 10 5b 41 5c 41
RSP: 0018:ffffc90003f4fc08 EFLAGS: 00000046
RAX: 1ffffffff2791fbb RBX: ffffffff93c8fdd8 RCX: ffffffff819b036a
RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffffff942d78e0
RBP: 0000000000000009 R08: ffffffff942d78e7 R09: 1ffffffff285af1c
R10: dffffc0000000000 R11: fffffbfff285af1d R12: ffff888034f0c6cc
R13: dffffc0000000000 R14: 0000000000000200 R15: ffff888034f0c6e8
FS: 00007f544cb48c80(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007feb8d3df0e8 CR3: 0000000011d9a000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
mark_usage kernel/locking/lockdep.c:4670 [inline]
__lock_acquire+0xc3e/0x2100 kernel/locking/lockdep.c:5180
lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5849
rcu_lock_acquire include/linux/rcupdate.h:337 [inline]
rcu_read_lock_trace include/linux/rcupdate_trace.h:58 [inline]
class_rcu_tasks_trace_constructor include/linux/rcupdate_trace.h:102 [inline]
trace_sys_exit include/trace/events/syscalls.h:44 [inline]
syscall_exit_work+0x15c/0x1d0 kernel/entry/common.c:169
syscall_exit_to_user_mode_prepare kernel/entry/common.c:200 [inline]
__syscall_exit_to_user_mode_work kernel/entry/common.c:205 [inline]
syscall_exit_to_user_mode+0x24a/0x340 kernel/entry/common.c:218
do_syscall_64+0x100/0x230 arch/x86/entry/common.c:89
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f544c716b6a
Code: 00 3d 00 00 41 00 75 0d 50 48 8d 3d 2d 08 0a 00 e8 ea 7d 01 00 31 c0 e9 07 ff ff ff 64 8b 04 25 18 00 00 00 85 c0 75 1b 0f 05 <48> 3d 00 f0 ff ff 76 6c 48 8b 15 8f a2 0d 00 f7 d8 64 89 02 48 83
RSP: 002b:00007ffee992f918 EFLAGS: 00000246 ORIG_RAX: 0000000000000000
RAX: 0000000000000080 RBX: 0000000000000000 RCX: 00007f544c716b6a
RDX: 0000000000000080 RSI: 00007ffee992fa08 RDI: 0000000000000003
RBP: 00007ffee992f958 R08: 0000000000000007 R09: 39d2d7db886f5279
R10: 00000000ffffffff R11: 0000000000000246 R12: 00005598553a9f40
R13: 00007ffee992f958 R14: 0000000000000001 R15: 0000559855395910
vkms_vblank_simulate: vblank timer overrun