INFO: task syz-executor.0:9793 blocked for more than 143 seconds.
Not tainted 6.1.90-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.0 state:D stack:27272 pid:9793 ppid:9148 flags:0x00004006
Call Trace:
context_switch kernel/sched/core.c:5245 [inline]
__schedule+0x142d/0x4550 kernel/sched/core.c:6558
schedule+0xbf/0x180 kernel/sched/core.c:6634
d_wait_lookup fs/dcache.c:2626 [inline]
d_alloc_parallel+0xbd5/0x1590 fs/dcache.c:2708
__lookup_slow+0x113/0x3d0 fs/namei.c:1675
lookup_slow+0x53/0x70 fs/namei.c:1707
walk_component fs/namei.c:1998 [inline]
link_path_walk+0x9d6/0xee0 fs/namei.c:2325
path_openat+0x23d/0x2e60 fs/namei.c:3781
do_filp_open+0x230/0x480 fs/namei.c:3812
do_sys_openat2+0x13b/0x500 fs/open.c:1318
do_sys_open fs/open.c:1334 [inline]
__do_sys_openat fs/open.c:1350 [inline]
__se_sys_openat fs/open.c:1345 [inline]
__x64_sys_openat+0x243/0x290 fs/open.c:1345
do_syscall_x64 arch/x86/entry/common.c:51 [inline]
do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:81
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f8519a7cee9
RSP: 002b:00007f851a8530c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007f8519bac050 RCX: 00007f8519a7cee9
RDX: 0000000000000002 RSI: 0000000020000040 RDI: ffffffffffffff9c
RBP: 00007f8519ac949e R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000006e R14: 00007f8519bac050 R15: 00007ffea6a00508
Showing all locks held in the system:
1 lock held by rcu_tasks_kthre/12:
#0: ffffffff8d12ae50 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x29/0xe30 kernel/rcu/tasks.h:516
1 lock held by rcu_tasks_trace/13:
#0: ffffffff8d12b650 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x29/0xe30 kernel/rcu/tasks.h:516
1 lock held by khungtaskd/28:
#0: ffffffff8d12ac80 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:350 [inline]
#0: ffffffff8d12ac80 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:791 [inline]
#0: ffffffff8d12ac80 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x51/0x290 kernel/locking/lockdep.c:6494
2 locks held by kworker/u4:5/1100:
2 locks held by getty/3311:
#0: ffff8880285ab098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x21/0x70 drivers/tty/tty_ldisc.c:244
#1: ffffc900031262f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6a7/0x1db0 drivers/tty/n_tty.c:2188
3 locks held by kworker/u5:7/3587:
#0: ffff88801e498138 ((wq_completion)hci5){+.+.}-{0:0}
, at: process_one_work+0x7a9/0x11d0 kernel/workqueue.c:2267
#1: ffffc90003e9fd20 ((work_completion)(&hdev->cmd_sync_work)){+.+.}-{0:0}, at: process_one_work+0x7a9/0x11d0 kernel/workqueue.c:2267
#2: ffff88807d6810b8 (&hdev->req_lock){+.+.}-{3:3}, at: hci_cmd_sync_work+0x1dc/0x400 net/bluetooth/hci_sync.c:308
9 locks held by kworker/0:7/3624:
1 lock held by syz-executor.0/9792:
1 lock held by syz-executor.0/9793:
#0: ffff8880575f0188 (&type->i_mutex_dir_key#32){.+.+}-{3:3}, at: inode_lock_shared include/linux/fs.h:768 [inline]
#0: ffff8880575f0188 (&type->i_mutex_dir_key#32){.+.+}-{3:3}, at: lookup_slow+0x45/0x70 fs/namei.c:1706
1 lock held by syz-executor.3/9928:
1 lock held by syz-executor.3/9932:
#0: ffff88805763cc18 (&type->i_mutex_dir_key#32){.+.+}-{3:3}, at: inode_lock_shared include/linux/fs.h:768 [inline]
#0: ffff88805763cc18 (&type->i_mutex_dir_key#32){.+.+}-{3:3}, at: lookup_slow+0x45/0x70 fs/namei.c:1706
1 lock held by syz-executor.2/10850:
#0: ffffffff8d130278 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:291 [inline]
#0: ffffffff8d130278 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x4f0/0x930 kernel/rcu/tree_exp.h:962
2 locks held by syz-executor.4/11628:
1 lock held by syz-executor.3/11627:
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 28 Comm: khungtaskd Not tainted 6.1.90-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x1e3/0x2cb lib/dump_stack.c:106
nmi_cpu_backtrace+0x4e1/0x560 lib/nmi_backtrace.c:111
nmi_trigger_cpumask_backtrace+0x1b0/0x3f0 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:148 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:220 [inline]
watchdog+0xf88/0xfd0 kernel/hung_task.c:377
kthread+0x28d/0x320 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 1100 Comm: kworker/u4:5 Not tainted 6.1.90-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024
Workqueue: bat_events batadv_nc_worker
RIP: 0010:_test_bit include/asm-generic/bitops/instrumented-non-atomic.h:141 [inline]
RIP: 0010:hlock_class kernel/locking/lockdep.c:228 [inline]
RIP: 0010:check_wait_context kernel/locking/lockdep.c:4748 [inline]
RIP: 0010:__lock_acquire+0x77a/0x1f80 kernel/locking/lockdep.c:4999
Code: 0f 83 df 01 00 00 48 89 e8 48 c1 e8 03 0f b6 04 10 84 c0 0f 85 2f 01 00 00 41 8b 5d 00 81 e3 ff 1f 00 00 48 89 d8 48 c1 e8 06 <48> 8d 3c c5 20 b2 49 90 be 08 00 00 00 e8 b4 96 77 00 48 0f a3 1d
RSP: 0000:ffffc90004b07940 EFLAGS: 00000003
RAX: 000000000000001a RBX: 00000000000006b2 RCX: 0000000000000001
RDX: dffffc0000000000 RSI: ffff888020c528a0 RDI: ffffffff9049b220
RBP: ffff888020c528c0 R08: dffffc0000000000 R09: fffffbfff2093645
R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000000
R13: ffff888020c528c0 R14: 0000000000000000 R15: 1ffff1100418a504
FS: 0000000000000000(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffbe261c000 CR3: 000000000ce8e000 CR4: 00000000003506e0
Call Trace:
lock_acquire+0x1f8/0x5a0 kernel/locking/lockdep.c:5662
rcu_lock_acquire include/linux/rcupdate.h:350 [inline]
rcu_read_lock include/linux/rcupdate.h:791 [inline]
batadv_nc_process_nc_paths+0xd6/0x390 net/batman-adv/network-coding.c:687
batadv_nc_worker+0x528/0x610 net/batman-adv/network-coding.c:735
process_one_work+0x8a9/0x11d0 kernel/workqueue.c:2292
worker_thread+0xa47/0x1200 kernel/workqueue.c:2439
kthread+0x28d/0x320 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308