INFO: task syz-executor.4:18119 blocked for more than 143 seconds.
Not tainted 5.10.0-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.4 state:D stack:29432 pid:18119 ppid: 8505 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:4327 [inline]
__schedule+0x8eb/0x21b0 kernel/sched/core.c:5078
schedule+0xcf/0x270 kernel/sched/core.c:5157
rwsem_down_write_slowpath+0x809/0x1220 kernel/locking/rwsem.c:1106
__down_write_common kernel/locking/rwsem.c:1261 [inline]
__down_write_common kernel/locking/rwsem.c:1258 [inline]
__down_write kernel/locking/rwsem.c:1270 [inline]
down_write+0x132/0x150 kernel/locking/rwsem.c:1407
inode_lock include/linux/fs.h:773 [inline]
vfs_utimes+0x3a1/0x790 fs/utimes.c:64
do_utimes_path+0xfd/0x1a0 fs/utimes.c:97
do_utimes+0x31/0xf0 fs/utimes.c:143
do_futimesat+0x13c/0x1b0 fs/utimes.c:197
do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x45e149
RSP: 002b:00007ff781ce8c68 EFLAGS: 00000246 ORIG_RAX: 00000000000000eb
RAX: ffffffffffffffda RBX: 0000000000000002 RCX: 000000000045e149
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000200020c0
RBP: 000000000119c060 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000119c034
R13: 00007ffe1e1aba9f R14: 00007ff781ce99c0 R15: 000000000119c034
Showing all locks held in the system:
3 locks held by kworker/u4:0/8:
#0: ffff8880b9d34d18 (&rq->lock){-.-.}-{2:2}, at: newidle_balance+0x7f8/0xea0 kernel/sched/fair.c:10642
#1: ffff88801cab6a00 (&p->pi_lock){-.-.}-{2:2}, at: try_to_wake_up+0x98/0x13f0 kernel/sched/core.c:3335
#2: ffffffff8b78e0e0 (rcu_read_lock){....}-{1:2}, at: batadv_nc_purge_orig_hash net/batman-adv/network-coding.c:402 [inline]
#2: ffffffff8b78e0e0 (rcu_read_lock){....}-{1:2}, at: batadv_nc_worker+0xf3/0xe80 net/batman-adv/network-coding.c:715
1 lock held by khungtaskd/1648:
#0: ffffffff8b78e0e0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x28c kernel/locking/lockdep.c:6254
1 lock held by in:imklog/8176:
#0: ffff888019916170 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 fs/file.c:947
2 locks held by rs:main Q:Reg/8177:
#0: ffff888015cbe5f0 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 fs/file.c:947
#1: ffff88802497c460 (sb_writers#4){.+.+}-{0:0}, at: ksys_write+0x12d/0x250 fs/read_write.c:658
2 locks held by syz-executor.4/18113:
2 locks held by syz-executor.4/18119:
#0: ffff88807b268460 (sb_writers#21){.+.+}-{0:0}, at: vfs_utimes+0x60e/0x790 fs/utimes.c:35
#1: ffff888068f39190 (&type->i_mutex_dir_key#9){++++}-{3:3}, at: inode_lock include/linux/fs.h:773 [inline]
#1: ffff888068f39190 (&type->i_mutex_dir_key#9){++++}-{3:3}, at: vfs_utimes+0x3a1/0x790 fs/utimes.c:64
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 1648 Comm: khungtaskd Not tainted 5.10.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
__dump_stack lib/dump_stack.c:79 [inline]
dump_stack+0x107/0x163 lib/dump_stack.c:120
nmi_cpu_backtrace.cold+0x3c/0xef lib/nmi_backtrace.c:105
nmi_trigger_cpumask_backtrace+0x1b3/0x230 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:209 [inline]
watchdog+0xe36/0x10b0 kernel/hung_task.c:294
kthread+0x3b1/0x4a0 kernel/kthread.c:292
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:296
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 110 Comm: kworker/u4:3 Not tainted 5.10.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: bat_events batadv_nc_worker
RIP: 0010:__lock_acquire+0x34/0x54b0 kernel/locking/lockdep.c:4690
Code: 41 55 41 89 d5 41 54 41 89 f4 55 53 44 89 c3 48 81 ec e8 00 00 00 48 8b 84 24 20 01 00 00 48 c7 84 24 88 00 00 00 b3 8a b5 41 <48> c7 84 24 90 00 00 00 cd 59 f0 8a 48 c7 84 24 98 00 00 00 a0 5c
RSP: 0018:ffffc900012679e0 EFLAGS: 00000082
RAX: 0000000000000000 RBX: 0000000000000001 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff888062985258
RBP: 0000000000000001 R08: 0000000000000001 R09: 0000000000000000
R10: fffffbfff1afb761 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: ffff888062985258 R15: 0000000000000000
FS: 0000000000000000(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f97afbb4000 CR3: 0000000026e65000 CR4: 00000000001506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
lock_acquire kernel/locking/lockdep.c:5437 [inline]
lock_acquire+0x29d/0x750 kernel/locking/lockdep.c:5402
__raw_spin_lock_bh include/linux/spinlock_api_smp.h:135 [inline]
_raw_spin_lock_bh+0x2f/0x40 kernel/locking/spinlock.c:175
spin_lock_bh include/linux/spinlock.h:359 [inline]
batadv_nc_purge_paths+0xdf/0x3a0 net/batman-adv/network-coding.c:438
batadv_nc_worker+0x86b/0xe80 net/batman-adv/network-coding.c:716
process_one_work+0x98d/0x1630 kernel/workqueue.c:2275
worker_thread+0x64c/0x1120 kernel/workqueue.c:2421
kthread+0x3b1/0x4a0 kernel/kthread.c:292
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:296