INFO: task syz-executor.1:9263 blocked for more than 143 seconds.
Not tainted 5.7.0-rc2-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor.1 D27992 9263 7865 0x00004004
Call Trace:
schedule+0xd0/0x2a0 kernel/sched/core.c:4157
rwsem_down_write_slowpath+0x706/0xf90 kernel/locking/rwsem.c:1235
__down_write kernel/locking/rwsem.c:1389 [inline]
down_write+0x137/0x150 kernel/locking/rwsem.c:1532
unregister_netdevice_notifier+0x1e/0x170 net/core/dev.c:1776
bcm_release+0x8b/0x660 net/can/bcm.c:1474
__sock_release+0x1d3/0x280 net/socket.c:605
sock_release net/socket.c:625 [inline]
__sys_socketpair+0x4f0/0x560 net/socket.c:1604
__do_sys_socketpair net/socket.c:1637 [inline]
__se_sys_socketpair net/socket.c:1634 [inline]
__x64_sys_socketpair+0x93/0xf0 net/socket.c:1634
do_syscall_64+0xf6/0x7d0 arch/x86/entry/common.c:295
entry_SYSCALL_64_after_hwframe+0x49/0xb3
RIP: 0033:0x45c829
Code: Bad RIP value.
RSP: 002b:00007f8559465c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000035
RAX: ffffffffffffffda RBX: 0000000000507660 RCX: 000000000045c829
RDX: 0000000000000002 RSI: 0000000000000002 RDI: 000000000000001d
RBP: 000000000078bf00 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000020000080 R11: 0000000000000246 R12: 00000000ffffffff
R13: 0000000000000baa R14: 00000000004cddc8 R15: 00007f85594666d4
Showing all locks held in the system:
4 locks held by kworker/u4:2/37:
#0: ffff8880a9771938 ((wq_completion)netns){+.+.}-{0:0}, at: __write_once_size include/linux/compiler.h:226 [inline]
#0: ffff8880a9771938 ((wq_completion)netns){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
#0: ffff8880a9771938 ((wq_completion)netns){+.+.}-{0:0}, at: atomic64_set include/asm-generic/atomic-instrumented.h:855 [inline]
#0: ffff8880a9771938 ((wq_completion)netns){+.+.}-{0:0}, at: atomic_long_set include/asm-generic/atomic-long.h:40 [inline]
#0: ffff8880a9771938 ((wq_completion)netns){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:615 [inline]
#0: ffff8880a9771938 ((wq_completion)netns){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:642 [inline]
#0: ffff8880a9771938 ((wq_completion)netns){+.+.}-{0:0}, at: process_one_work+0x844/0x16a0 kernel/workqueue.c:2239
#1: ffffc90000e97dc0 (net_cleanup_work){+.+.}-{0:0}, at: process_one_work+0x878/0x16a0 kernel/workqueue.c:2243
#2: ffffffff8a576ef0 (pernet_ops_rwsem){++++}-{3:3}, at: cleanup_net+0x9b/0xa50 net/core/net_namespace.c:565
#3: ffff8880ae637998 (&rq->lock){-.-.}-{2:2}, at: rq_lock kernel/sched/sched.h:1262 [inline]
#3: ffff8880ae637998 (&rq->lock){-.-.}-{2:2}, at: __schedule+0x233/0x1ff0 kernel/sched/core.c:4028
3 locks held by kworker/u4:3/99:
1 lock held by khungtaskd/1134:
#0: ffffffff899beac0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:5754
2 locks held by kworker/0:3/2726:
#0: ffff8880aa026d38 ((wq_completion)events){+.+.}-{0:0}, at: __write_once_size include/linux/compiler.h:226 [inline]
#0: ffff8880aa026d38 ((wq_completion)events){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
#0: ffff8880aa026d38 ((wq_completion)events){+.+.}-{0:0}, at: atomic64_set include/asm-generic/atomic-instrumented.h:855 [inline]
#0: ffff8880aa026d38 ((wq_completion)events){+.+.}-{0:0}, at: atomic_long_set include/asm-generic/atomic-long.h:40 [inline]
#0: ffff8880aa026d38 ((wq_completion)events){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:615 [inline]
#0: ffff8880aa026d38 ((wq_completion)events){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:642 [inline]
#0: ffff8880aa026d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x844/0x16a0 kernel/workqueue.c:2239
#1: ffffc90007ed7dc0 ((work_completion)(&pwq->unbound_release_work)){+.+.}-{0:0}, at: process_one_work+0x878/0x16a0 kernel/workqueue.c:2243
1 lock held by in:imklog/6724:
#0: ffff8880a6472db0 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 fs/file.c:826
1 lock held by syz-executor.1/9263:
#0: ffffffff8a576ef0 (pernet_ops_rwsem){++++}-{3:3}, at: unregister_netdevice_notifier+0x1e/0x170 net/core/dev.c:1776
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 1134 Comm: khungtaskd Not tainted 5.7.0-rc2-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
__dump_stack lib/dump_stack.c:77 [inline]
dump_stack+0x188/0x20d lib/dump_stack.c:118
nmi_cpu_backtrace.cold+0x70/0xb1 lib/nmi_backtrace.c:101
nmi_trigger_cpumask_backtrace+0x231/0x27e lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:205 [inline]
watchdog+0xa8c/0x1010 kernel/hung_task.c:289
kthread+0x388/0x470 kernel/kthread.c:268
ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0 skipped: idling at native_safe_halt+0xe/0x10 arch/x86/include/asm/irqflags.h:60