INFO: task syz-executor.0:28701 blocked for more than 143 seconds. Not tainted 5.13.0-rc3-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.0 state:D stack:29136 pid:28701 ppid: 8451 flags:0x00000004 Call Trace: context_switch kernel/sched/core.c:4339 [inline] __schedule+0x916/0x23e0 kernel/sched/core.c:5147 schedule+0xcf/0x270 kernel/sched/core.c:5226 rwsem_down_write_slowpath+0x7e5/0x1200 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 bcm_init+0x1a3/0x210 net/can/bcm.c:1451 can_create+0x27c/0x4d0 net/can/af_can.c:168 __sock_create+0x3de/0x780 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: 0033:0x4665d9 RSP: 002b:00007f290c5dc188 EFLAGS: 00000246 ORIG_RAX: 0000000000000029 RAX: ffffffffffffffda RBX: 000000000056c038 RCX: 00000000004665d9 RDX: 0000000000000002 RSI: 0000000000000002 RDI: 000000000000001d RBP: 00000000004bfcb9 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056c038 R13: 00007ffe2d7d9d0f R14: 00007f290c5dc300 R15: 0000000000022000 INFO: task syz-executor.0:28704 blocked for more than 143 seconds. Not tainted 5.13.0-rc3-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.0 state:D stack:29136 pid:28704 ppid: 8451 flags:0x00000004 Call Trace: context_switch kernel/sched/core.c:4339 [inline] __schedule+0x916/0x23e0 kernel/sched/core.c:5147 schedule+0xcf/0x270 kernel/sched/core.c:5226 rwsem_down_write_slowpath+0x7e5/0x1200 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 bcm_init+0x1a3/0x210 net/can/bcm.c:1451 can_create+0x27c/0x4d0 net/can/af_can.c:168 __sock_create+0x3de/0x780 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: 0033:0x4665d9 RSP: 002b:00007f290c5bb188 EFLAGS: 00000246 ORIG_RAX: 0000000000000029 RAX: ffffffffffffffda RBX: 000000000056c0f0 RCX: 00000000004665d9 RDX: 0000000000000002 RSI: 0000000000000002 RDI: 000000000000001d RBP: 00000000004bfcb9 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056c0f0 R13: 00007ffe2d7d9d0f R14: 00007f290c5bb300 R15: 0000000000022000 Showing all locks held in the system: 1 lock held by ksoftirqd/0/13: #0: ffff8880b9c35658 (&rq->lock){-.-.}-{2:2}, at: rq_lock kernel/sched/sched.h:1334 [inline] #0: ffff8880b9c35658 (&rq->lock){-.-.}-{2:2}, at: __schedule+0x21c/0x23e0 kernel/sched/core.c:5061 4 locks held by kworker/u4:6/233: #0: ffff888143d8b138 ((wq_completion)netns){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: ffff888143d8b138 ((wq_completion)netns){+.+.}-{0:0}, at: atomic64_set include/asm-generic/atomic-instrumented.h:856 [inline] #0: ffff888143d8b138 ((wq_completion)netns){+.+.}-{0:0}, at: atomic_long_set include/asm-generic/atomic-long.h:41 [inline] #0: ffff888143d8b138 ((wq_completion)netns){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:617 [inline] #0: ffff888143d8b138 ((wq_completion)netns){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:644 [inline] #0: ffff888143d8b138 ((wq_completion)netns){+.+.}-{0:0}, at: process_one_work+0x871/0x1600 kernel/workqueue.c:2247 #1: ffffc90001a1fda8 (net_cleanup_work){+.+.}-{0:0}, at: process_one_work+0x8a5/0x1600 kernel/workqueue.c:2251 #2: ffffffff8d692c50 (pernet_ops_rwsem){++++}-{3:3}, at: cleanup_net+0x9b/0xb10 net/core/net_namespace.c:557 #3: ffffffff8bf82430 (rcu_state.barrier_mutex){+.+.}-{3:3}, at: rcu_barrier+0x44/0x430 kernel/rcu/tree.c:4018 1 lock held by khungtaskd/1613: #0: ffffffff8bf79320 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6333 1 lock held by in:imklog/8144: #0: ffff888025889c70 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 fs/file.c:974 2 locks held by kworker/u4:7/16064: #0: ffff8880b9c35658 (&rq->lock){-.-.}-{2:2}, at: newidle_balance+0x801/0xe60 kernel/sched/fair.c:10665 #1: ffffc90004587da8 ((work_completion)(&(&bat_priv->orig_work)->work)){+.+.}-{0:0}, at: process_one_work+0x8a5/0x1600 kernel/workqueue.c:2251 1 lock held by syz-executor.0/28701: #0: ffffffff8d692c50 (pernet_ops_rwsem){++++}-{3:3}, at: register_netdevice_notifier+0x1e/0x260 net/core/dev.c:1902 1 lock held by syz-executor.0/28704: #0: ffffffff8d692c50 (pernet_ops_rwsem){++++}-{3:3}, at: register_netdevice_notifier+0x1e/0x260 net/core/dev.c:1902 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 1613 Comm: khungtaskd Not tainted 5.13.0-rc3-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:209 [inline] watchdog+0xd48/0xfb0 kernel/hung_task.c:294 kthread+0x3b1/0x4a0 kernel/kthread.c:313 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 16064 Comm: kworker/u4:7 Not tainted 5.13.0-rc3-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: phy34 ieee80211_iface_work RIP: 0010:ieee80211_sta_last_active+0x0/0xf0 net/mac80211/sta_info.c:2547 Code: 96 fe ff ff e8 81 f9 4f f9 e9 c9 fc ff ff 48 89 ef e8 74 f9 4f f9 e9 22 fd ff ff 4c 89 e7 e8 67 f9 4f f9 e9 3b ff ff ff 66 90 <41> 54 49 89 fc 55 53 e8 d4 e5 0a f9 4c 89 e7 e8 fc 9f fe ff 49 8d RSP: 0018:ffffc90004587b58 EFLAGS: 00000293 RAX: 0000000000000000 RBX: ffff88805f3b8d00 RCX: 0000000000000000 RDX: ffff8880692e54c0 RSI: ffffffff886daca4 RDI: ffff88806e540000 RBP: ffff88806e540000 R08: 0000000000000000 R09: ffff88805f3b95af R10: ffffed100be772b5 R11: 0000000000000001 R12: ffff88805f3b9680 R13: dffffc0000000000 R14: ffff88805f3e8c00 R15: 0000000000000080 FS: 0000000000000000(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f095003f5d0 CR3: 0000000027649000 CR4: 00000000001506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: ieee80211_ibss_sta_expire net/mac80211/ibss.c:1265 [inline] ieee80211_sta_merge_ibss net/mac80211/ibss.c:1305 [inline] ieee80211_ibss_work+0x52c/0xe80 net/mac80211/ibss.c:1711 ieee80211_iface_work+0x893/0x9e0 net/mac80211/iface.c:1459 process_one_work+0x98d/0x1600 kernel/workqueue.c:2276 worker_thread+0x64c/0x1120 kernel/workqueue.c:2422 kthread+0x3b1/0x4a0 kernel/kthread.c:313 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294