INFO: task syz-executor.0:7568 blocked for more than 143 seconds.
Not tainted 6.2.0-rc4-syzkaller-00009-gd532dd102151 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.0 state:D stack:21912 pid:7568 ppid:5105 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5293 [inline]
__schedule+0x995/0xe20 kernel/sched/core.c:6606
schedule+0xcb/0x190 kernel/sched/core.c:6682
request_wait_answer fs/fuse/dev.c:407 [inline]
__fuse_request_send fs/fuse/dev.c:426 [inline]
fuse_simple_request+0x1034/0x1870 fs/fuse/dev.c:511
fuse_lookup_name+0x349/0x830 fs/fuse/dir.c:392
fuse_lookup+0x13e/0x5d0 fs/fuse/dir.c:433
__lookup_hash+0x115/0x240 fs/namei.c:1601
filename_create+0x25f/0x4f0 fs/namei.c:3808
do_mkdirat+0xb5/0x530 fs/namei.c:4051
__do_sys_mkdir fs/namei.c:4081 [inline]
__se_sys_mkdir fs/namei.c:4079 [inline]
__x64_sys_mkdir+0x6a/0x80 fs/namei.c:4079
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f6f4f48c0c9
RSP: 002b:00007f6f50132168 EFLAGS: 00000246 ORIG_RAX: 0000000000000053
RAX: ffffffffffffffda RBX: 00007f6f4f5ac120 RCX: 00007f6f4f48c0c9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000040
RBP: 00007f6f4f4e7ae9 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffdb5e269bf R14: 00007f6f50132300 R15: 0000000000022000
Showing all locks held in the system:
1 lock held by rcu_tasks_kthre/12:
#0: ffffffff8d326fd0 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x30/0xd00 kernel/rcu/tasks.h:507
1 lock held by rcu_tasks_trace/13:
#0: ffffffff8d3277d0 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x30/0xd00 kernel/rcu/tasks.h:507
1 lock held by khungtaskd/28:
#0: ffffffff8d326e00 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30
2 locks held by getty/4747:
#0: ffff88802859b098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x21/0x70 drivers/tty/tty_ldisc.c:244
#1: ffffc900015b02f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x53b/0x1650 drivers/tty/n_tty.c:2177
2 locks held by kworker/1:9/5337:
#0: ffff888012872538 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: process_one_work+0x7f2/0xdb0
#1: ffffc9000566fd00 ((work_completion)(&rew->rew_work)){+.+.}-{0:0}, at: process_one_work+0x831/0xdb0 kernel/workqueue.c:2264
1 lock held by syz-executor.1/17841:
#0: ffffffff8d32c478 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:292 [inline]
#0: ffffffff8d32c478 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x384/0x860 kernel/rcu/tree_exp.h:946
3 locks held by kworker/0:20/3650:
2 locks held by syz-executor.0/7568:
#0: ffff88807c0ce460 (sb_writers#31){.+.+}-{0:0}, at: mnt_want_write+0x3b/0x80 fs/namespace.c:508
#1: ffff88808037e690 (&type->i_mutex_dir_key#13/1){+.+.}-{3:3}, at: inode_lock_nested include/linux/fs.h:791 [inline]
#1: ffff88808037e690 (&type->i_mutex_dir_key#13/1){+.+.}-{3:3}, at: filename_create+0x22a/0x4f0 fs/namei.c:3807
2 locks held by syz-executor.0/8382:
#0: ffff8880284e6460 (sb_writers#31){.+.+}-{0:0}, at: mnt_want_write+0x3b/0x80 fs/namespace.c:508
#1: ffff88808765cb90 (&type->i_mutex_dir_key#13/1){+.+.}-{3:3}, at: inode_lock_nested include/linux/fs.h:791 [inline]
#1: ffff88808765cb90 (&type->i_mutex_dir_key#13/1){+.+.}-{3:3}, at: filename_create+0x22a/0x4f0 fs/namei.c:3807
2 locks held by syz-executor.0/8648:
#0: ffff88808828a460 (sb_writers#31){.+.+}-{0:0}, at: mnt_want_write+0x3b/0x80 fs/namespace.c:508
#1: ffff88808037be10 (&type->i_mutex_dir_key#13/1){+.+.}-{3:3}, at: inode_lock_nested include/linux/fs.h:791 [inline]
#1: ffff88808037be10 (&type->i_mutex_dir_key#13/1){+.+.}-{3:3}, at: filename_create+0x22a/0x4f0 fs/namei.c:3807
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 28 Comm: khungtaskd Not tainted 6.2.0-rc4-syzkaller-00009-gd532dd102151 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x1b1/0x290 lib/dump_stack.c:106
nmi_cpu_backtrace+0x46f/0x4f0 lib/nmi_backtrace.c:111
nmi_trigger_cpumask_backtrace+0x1ba/0x420 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+0xcd5/0xd20 kernel/hung_task.c:377
kthread+0x266/0x300 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 10235 Comm: kworker/u4:26 Not tainted 6.2.0-rc4-syzkaller-00009-gd532dd102151 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022
Workqueue: bat_events batadv_nc_worker
RIP: 0010:check_wait_context kernel/locking/lockdep.c:4745 [inline]
RIP: 0010:__lock_acquire+0x639/0x1f60 kernel/locking/lockdep.c:5005
Code: 00 41 89 ec ff cd 0f 88 9d 00 00 00 89 eb 83 fd 31 73 78 48 8d 04 9b 49 8d 9c c5 58 0a 00 00 48 89 d8 48 c1 e8 03 0f b6 04 10 <84> c0 75 1c 8b 1b 48 8b 44 24 18 0f b6 04 10 84 c0 75 2d 41 33 1f
RSP: 0018:ffffc9001215f908 EFLAGS: 00000806
RAX: 0000000000000000 RBX: ffff8880329ce240 RCX: 0000000000000002
RDX: dffffc0000000000 RSI: 0000000000000008 RDI: ffffffff907e3258
RBP: 0000000000000001 R08: dffffc0000000000 R09: fffffbfff20fc64c
R10: fffffbfff20fc64c R11: 1ffffffff20fc64b R12: 0000000000000002
R13: ffff8880329cd7c0 R14: ffff8880329ce1f0 R15: ffff8880329ce268
FS: 0000000000000000(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000563f0de96b70 CR3: 000000000d08e000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
lock_acquire+0x182/0x3c0 kernel/locking/lockdep.c:5668
__raw_spin_lock_bh include/linux/spinlock_api_smp.h:126 [inline]
_raw_spin_lock_bh+0x31/0x40 kernel/locking/spinlock.c:178
spin_lock_bh include/linux/spinlock.h:355 [inline]
batadv_nc_purge_paths+0xe0/0x3f0 net/batman-adv/network-coding.c:442
batadv_nc_worker+0x31e/0x5b0 net/batman-adv/network-coding.c:722
process_one_work+0x877/0xdb0 kernel/workqueue.c:2289
worker_thread+0xb14/0x1330 kernel/workqueue.c:2436
kthread+0x266/0x300 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308