INFO: task syz-executor.5:15161 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.5 state:D stack:29592 pid:15161 ppid: 9581 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 raw_init+0x296/0x340 net/can/raw.c:339 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:00007f7438726188 EFLAGS: 00000246 ORIG_RAX: 0000000000000029 RAX: ffffffffffffffda RBX: 000000000056bf80 RCX: 00000000004665d9 RDX: 0000000000000001 RSI: 0000000000000003 RDI: 000000000000001d RBP: 00000000004bfcb9 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf80 R13: 00007ffcd1c1397f R14: 00007f7438726300 R15: 0000000000022000 Showing all locks held in the system: 3 locks held by kworker/u4:1/25: 1 lock held by khungtaskd/1635: #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/8135: #0: ffff888020ec4af0 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 fs/file.c:974 3 locks held by kworker/u4:13/17468: #0: ffff88814012b138 ((wq_completion)netns){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: ffff88814012b138 ((wq_completion)netns){+.+.}-{0:0}, at: atomic64_set include/asm-generic/atomic-instrumented.h:856 [inline] #0: ffff88814012b138 ((wq_completion)netns){+.+.}-{0:0}, at: atomic_long_set include/asm-generic/atomic-long.h:41 [inline] #0: ffff88814012b138 ((wq_completion)netns){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:617 [inline] #0: ffff88814012b138 ((wq_completion)netns){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:644 [inline] #0: ffff88814012b138 ((wq_completion)netns){+.+.}-{0:0}, at: process_one_work+0x871/0x1600 kernel/workqueue.c:2247 #1: ffffc9000178fda8 (net_cleanup_work){+.+.}-{0:0}, at: process_one_work+0x8a5/0x1600 kernel/workqueue.c:2251 #2: ffffffff8d693050 (pernet_ops_rwsem){++++}-{3:3}, at: cleanup_net+0x9b/0xb10 net/core/net_namespace.c:557 5 locks held by kworker/u4:3/7150: #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 #1: ffff8880b9c1f988 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: psi_task_switch+0x24c/0x670 kernel/sched/psi.c:872 #2: ffff8880ab76cd00 (&wdev->mtx){+.+.}-{3:3}, at: sdata_lock net/mac80211/ieee80211_i.h:1003 [inline] #2: ffff8880ab76cd00 (&wdev->mtx){+.+.}-{3:3}, at: ieee80211_ibss_work+0x93/0xe80 net/mac80211/ibss.c:1683 #3: ffffffff8bf79320 (rcu_read_lock){....}-{1:2}, at: sdata_assert_lock net/mac80211/ieee80211_i.h:1020 [inline] #3: ffffffff8bf79320 (rcu_read_lock){....}-{1:2}, at: ieee80211_sta_active_ibss+0x86/0x350 net/mac80211/ibss.c:659 #4: ffff8880b9c24030 (krc.lock){..-.}-{2:2}, at: krc_this_cpu_lock kernel/rcu/tree.c:3223 [inline] #4: ffff8880b9c24030 (krc.lock){..-.}-{2:2}, at: add_ptr_to_bulk_krc_lock kernel/rcu/tree.c:3507 [inline] #4: ffff8880b9c24030 (krc.lock){..-.}-{2:2}, at: kvfree_call_rcu+0xde/0x8c0 kernel/rcu/tree.c:3598 1 lock held by syz-executor.5/15161: #0: ffffffff8d693050 (pernet_ops_rwsem){++++}-{3:3}, at: register_netdevice_notifier+0x1e/0x260 net/core/dev.c:1902 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 1635 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: 11825 Comm: kworker/0:41 Not tainted 5.13.0-rc3-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: 0x0 (mm_percpu_wq) RIP: 0010:tracing_record_taskinfo_sched_switch+0x4/0x430 kernel/trace/trace.c:2534 Code: ff ff e8 5f df 40 00 e9 a3 fe ff ff 48 89 df e8 c2 df 40 00 e9 48 ff ff ff e8 48 df 40 00 e9 0c ff ff ff 0f 1f 00 41 56 41 55 <49> 89 f5 41 54 49 89 fc 55 53 89 d3 e8 eb ca fb ff 89 df e8 34 6f RSP: 0018:ffffc90009fb7d08 EFLAGS: 00000093 RAX: 0000000000000000 RBX: 0000000000000001 RCX: 0000000000000000 RDX: 0000000000000001 RSI: ffff88802d2d3880 RDI: ffff88805ab88000 RBP: ffff88805ab88000 R08: 0000000000000000 R09: ffffffff8dc98257 R10: ffffffff817ad70f R11: 0000000000000000 R12: ffff88802d2d3880 R13: 0000000000000000 R14: 0000000000000001 R15: ffff88802d2d3880 FS: 0000000000000000(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f4f72955000 CR3: 000000000bc8e000 CR4: 00000000001506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: probe_sched_switch+0x7c/0x90 kernel/trace/trace_sched_switch.c:34 trace_sched_switch include/trace/events/sched.h:222 [inline] __schedule+0x12b6/0x23e0 kernel/sched/core.c:5144 schedule+0xcf/0x270 kernel/sched/core.c:5226 worker_thread+0x14c/0x1120 kernel/workqueue.c:2443 kthread+0x3b1/0x4a0 kernel/kthread.c:313 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294