INFO: task syz-executor.2:18706 can't die for more than 143 seconds.
task:syz-executor.2 state:D stack:29592 pid:18706 ppid: 12801 flags:0x00000004
Call Trace:
context_switch kernel/sched/core.c:4329 [inline]
__schedule+0x917/0x2170 kernel/sched/core.c:5079
schedule+0xcf/0x270 kernel/sched/core.c:5158
rwsem_down_write_slowpath+0x7dc/0x1200 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+0x137/0x150 kernel/locking/rwsem.c:1407
register_netdevice_notifier+0x1e/0x260 net/core/dev.c:1902
raw_init+0x296/0x340 net/can/raw.c:339
can_create+0x27c/0x4d0 net/can/af_can.c:168
__sock_create+0x353/0x790 net/socket.c:1408
sock_create net/socket.c:1459 [inline]
__sys_socket+0xef/0x200 net/socket.c:1501
__do_sys_socket net/socket.c:1510 [inline]
__se_sys_socket net/socket.c:1508 [inline]
__x64_sys_socket+0x6f/0xb0 net/socket.c:1508
do_syscall_64+0x3a/0xb0 arch/x86/entry/common.c:47
entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x466459
RSP: 002b:00007f633d93c188 EFLAGS: 00000246 ORIG_RAX: 0000000000000029
RAX: ffffffffffffffda RBX: 000000000056bf60 RCX: 0000000000466459
RDX: 0000000000000001 RSI: 0000000000000003 RDI: 000000000000001d
RBP: 00000000004bf9fb R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf60
R13: 00007fffe8fb093f R14: 00007f633d93c300 R15: 0000000000022000
INFO: task syz-executor.2:18706 blocked for more than 143 seconds.
Not tainted 5.12.0-rc7-next-20210415-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.2 state:D stack:29592 pid:18706 ppid: 12801 flags:0x00000004
Call Trace:
context_switch kernel/sched/core.c:4329 [inline]
__schedule+0x917/0x2170 kernel/sched/core.c:5079
schedule+0xcf/0x270 kernel/sched/core.c:5158
rwsem_down_write_slowpath+0x7dc/0x1200 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+0x137/0x150 kernel/locking/rwsem.c:1407
register_netdevice_notifier+0x1e/0x260 net/core/dev.c:1902
raw_init+0x296/0x340 net/can/raw.c:339
can_create+0x27c/0x4d0 net/can/af_can.c:168
__sock_create+0x353/0x790 net/socket.c:1408
sock_create net/socket.c:1459 [inline]
__sys_socket+0xef/0x200 net/socket.c:1501
__do_sys_socket net/socket.c:1510 [inline]
__se_sys_socket net/socket.c:1508 [inline]
__x64_sys_socket+0x6f/0xb0 net/socket.c:1508
do_syscall_64+0x3a/0xb0 arch/x86/entry/common.c:47
entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x466459
RSP: 002b:00007f633d93c188 EFLAGS: 00000246 ORIG_RAX: 0000000000000029
RAX: ffffffffffffffda RBX: 000000000056bf60 RCX: 0000000000466459
RDX: 0000000000000001 RSI: 0000000000000003 RDI: 000000000000001d
RBP: 00000000004bf9fb R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf60
R13: 00007fffe8fb093f R14: 00007f633d93c300 R15: 0000000000022000
INFO: task syz-executor.2:18709 can't die for more than 144 seconds.
task:syz-executor.2 state:D stack:29592 pid:18709 ppid: 12801 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:4329 [inline]
__schedule+0x917/0x2170 kernel/sched/core.c:5079
schedule+0xcf/0x270 kernel/sched/core.c:5158
rwsem_down_write_slowpath+0x7dc/0x1200 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+0x137/0x150 kernel/locking/rwsem.c:1407
register_netdevice_notifier+0x1e/0x260 net/core/dev.c:1902
raw_init+0x296/0x340 net/can/raw.c:339
can_create+0x27c/0x4d0 net/can/af_can.c:168
__sock_create+0x353/0x790 net/socket.c:1408
sock_create net/socket.c:1459 [inline]
__sys_socket+0xef/0x200 net/socket.c:1501
__do_sys_socket net/socket.c:1510 [inline]
__se_sys_socket net/socket.c:1508 [inline]
__x64_sys_socket+0x6f/0xb0 net/socket.c:1508
do_syscall_64+0x3a/0xb0 arch/x86/entry/common.c:47
entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x466459
RSP: 002b:00007f633d91b188 EFLAGS: 00000246 ORIG_RAX: 0000000000000029
RAX: ffffffffffffffda RBX: 000000000056c008 RCX: 0000000000466459
RDX: 0000000000000001 RSI: 0000000000000003 RDI: 000000000000001d
RBP: 00000000004bf9fb R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056c008
R13: 00007fffe8fb093f R14: 00007f633d91b300 R15: 0000000000022000
INFO: task syz-executor.2:18709 blocked for more than 144 seconds.
Not tainted 5.12.0-rc7-next-20210415-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.2 state:D stack:29592 pid:18709 ppid: 12801 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:4329 [inline]
__schedule+0x917/0x2170 kernel/sched/core.c:5079
schedule+0xcf/0x270 kernel/sched/core.c:5158
rwsem_down_write_slowpath+0x7dc/0x1200 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+0x137/0x150 kernel/locking/rwsem.c:1407
register_netdevice_notifier+0x1e/0x260 net/core/dev.c:1902
raw_init+0x296/0x340 net/can/raw.c:339
can_create+0x27c/0x4d0 net/can/af_can.c:168
__sock_create+0x353/0x790 net/socket.c:1408
sock_create net/socket.c:1459 [inline]
__sys_socket+0xef/0x200 net/socket.c:1501
__do_sys_socket net/socket.c:1510 [inline]
__se_sys_socket net/socket.c:1508 [inline]
__x64_sys_socket+0x6f/0xb0 net/socket.c:1508
do_syscall_64+0x3a/0xb0 arch/x86/entry/common.c:47
entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x466459
RSP: 002b:00007f633d91b188 EFLAGS: 00000246 ORIG_RAX: 0000000000000029
RAX: ffffffffffffffda RBX: 000000000056c008 RCX: 0000000000466459
RDX: 0000000000000001 RSI: 0000000000000003 RDI: 000000000000001d
RBP: 00000000004bf9fb R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056c008
R13: 00007fffe8fb093f R14: 00007f633d91b300 R15: 0000000000022000
Showing all locks held in the system:
4 locks held by kworker/u4:4/134:
1 lock held by khungtaskd/1650:
#0: ffffffff8bf76560 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6333
1 lock held by in:imklog/8133:
#0: ffff88801d7ae370 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 fs/file.c:990
1 lock held by syz-executor.2/18706:
#0: ffffffff8d681250 (pernet_ops_rwsem){++++}-{3:3}, at: register_netdevice_notifier+0x1e/0x260 net/core/dev.c:1902
1 lock held by syz-executor.2/18709:
#0: ffffffff8d681250 (pernet_ops_rwsem){++++}-{3:3}, at: register_netdevice_notifier+0x1e/0x260 net/core/dev.c:1902
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 1650 Comm: khungtaskd Not tainted 5.12.0-rc7-next-20210415-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+0x141/0x1d7 lib/dump_stack.c:120
nmi_cpu_backtrace.cold+0x44/0xd7 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:253 [inline]
watchdog+0xd3b/0xf50 kernel/hung_task.c:338
kthread+0x3b1/0x4a0 kernel/kthread.c:292
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 25 Comm: kworker/u4:1 Not tainted 5.12.0-rc7-next-20210415-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: bat_events batadv_nc_worker
RIP: 0010:instrument_atomic_read include/linux/instrumented.h:71 [inline]
RIP: 0010:test_bit include/asm-generic/bitops/instrumented-non-atomic.h:134 [inline]
RIP: 0010:hlock_class kernel/locking/lockdep.c:199 [inline]
RIP: 0010:__lock_acquire+0xb35/0x5230 kernel/locking/lockdep.c:4899
Code: 48 8b 7c 24 30 e8 bb 77 5f 00 0f b7 5d 20 66 81 e3 ff 1f 0f b7 db be 08 00 00 00 48 89 d8 48 c1 f8 06 48 8d 3c c5 a0 b8 de 8f <e8> 06 7b 5f 00 48 0f a3 1d 2e fb 84 0e 0f 83 04 0d 00 00 48 8d 1c
RSP: 0018:ffffc90000dffa60 EFLAGS: 00000047
RAX: 0000000000000000 RBX: 0000000000000026 RCX: ffffffff8159c631
RDX: 1ffff1100241586d RSI: 0000000000000008 RDI: ffffffff8fdeb8a0
RBP: ffff8880120ac348 R08: 0000000000000000 R09: ffffffff8fdeb977
R10: fffffbfff1fbd72e R11: 0000000000000000 R12: ffff8880120ab900
R13: 0000000000000000 R14: ffff8880120ac2f8 R15: 0000000000000000
FS: 0000000000000000(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000c00d84a000 CR3: 0000000012301000 CR4: 00000000001506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
lock_acquire kernel/locking/lockdep.c:5512 [inline]
lock_acquire+0x1ab/0x740 kernel/locking/lockdep.c:5477
rcu_lock_acquire include/linux/rcupdate.h:267 [inline]
rcu_read_lock include/linux/rcupdate.h:657 [inline]
batadv_nc_purge_orig_hash net/batman-adv/network-coding.c:404 [inline]
batadv_nc_worker+0x12d/0xe50 net/batman-adv/network-coding.c:715
process_one_work+0x98d/0x1600 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:294