8021q: adding VLAN 0 to HW filter on device batadv0 8021q: adding VLAN 0 to HW filter on device batadv0 IPv6: ADDRCONF(NETDEV_UP): vxcan1: link is not ready 8021q: adding VLAN 0 to HW filter on device batadv0 INFO: task syz-executor.4:7276 blocked for more than 140 seconds. Not tainted 4.14.174-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.4 D28400 7276 6105 0x00000004 Call Trace: context_switch kernel/sched/core.c:2808 [inline] __schedule+0x786/0x1d30 kernel/sched/core.c:3384 schedule+0x7f/0x1b0 kernel/sched/core.c:3428 schedule_timeout+0x6ea/0xcc0 kernel/time/timer.c:1723 do_wait_for_common kernel/sched/completion.c:91 [inline] __wait_for_common kernel/sched/completion.c:112 [inline] wait_for_common kernel/sched/completion.c:123 [inline] wait_for_completion+0x263/0x440 kernel/sched/completion.c:144 flush_work+0x38b/0x720 kernel/workqueue.c:2893 __cancel_work_timer+0x286/0x420 kernel/workqueue.c:2964 cancel_work_sync+0xb/0x10 kernel/workqueue.c:3000 p9_conn_destroy net/9p/trans_fd.c:872 [inline] p9_fd_close+0x263/0x410 net/9p/trans_fd.c:899 p9_client_create+0x9a5/0xf50 net/9p/client.c:1095 v9fs_session_init+0x1e1/0x1480 fs/9p/v9fs.c:422 v9fs_mount+0x73/0x770 fs/9p/vfs_super.c:135 mount_fs+0x84/0x26e fs/super.c:1237 vfs_kern_mount.part.33+0x58/0x3c0 fs/namespace.c:1046 vfs_kern_mount fs/namespace.c:1036 [inline] do_new_mount fs/namespace.c:2549 [inline] do_mount+0x36b/0x26a0 fs/namespace.c:2879 SYSC_mount fs/namespace.c:3095 [inline] SyS_mount+0xb8/0xd0 fs/namespace.c:3072 do_syscall_64+0x1c9/0x5b0 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x458c29 RSP: 002b:00007f26ee79ac78 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 0000000000000005 RCX: 0000000000458c29 RDX: 0000000020000100 RSI: 00000000200000c0 RDI: 0000000000000000 RBP: 000000000073bf00 R08: 0000000020000140 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f26ee79b6d4 R13: 00000000004c4c14 R14: 00000000004d88a0 R15: 00000000ffffffff Showing all locks held in the system: 2 locks held by kworker/0:1/24: #0: ("events"){+.+.}, at: [] work_static include/linux/workqueue.h:199 [inline] #0: ("events"){+.+.}, at: [] set_work_data kernel/workqueue.c:619 [inline] #0: ("events"){+.+.}, at: [] set_work_pool_and_clear_pending kernel/workqueue.c:646 [inline] #0: ("events"){+.+.}, at: [] process_one_work+0x6cd/0x16c0 kernel/workqueue.c:2087 #1: ((&m->rq)){+.+.}, at: [] process_one_work+0x703/0x16c0 kernel/workqueue.c:2091 1 lock held by khungtaskd/1012: #0: (tasklist_lock){.+.+}, at: [] debug_show_all_locks+0x79/0x218 kernel/locking/lockdep.c:4544 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 1012 Comm: khungtaskd Not tainted 4.14.174-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0xf7/0x13b lib/dump_stack.c:58 nmi_cpu_backtrace.cold.4+0x3e/0x76 lib/nmi_backtrace.c:101 nmi_trigger_cpumask_backtrace+0xe5/0x119 lib/nmi_backtrace.c:62 arch_trigger_cpumask_backtrace+0x14/0x20 arch/x86/kernel/apic/hw_nmi.c:38 trigger_all_cpu_backtrace include/linux/nmi.h:140 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:195 [inline] watchdog+0x522/0xb40 kernel/hung_task.c:274 kthread+0x33b/0x410 kernel/kthread.c:232 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:404 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 3438 Comm: systemd-journal Not tainted 4.14.174-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 task: ffff888094c8e5c0 task.stack: ffff888094c90000 RIP: 0033:0x7fdad05a7100 RSP: 002b:00007ffd69c51228 EFLAGS: 00000206 RAX: 00007fdad07af000 RBX: 0000000000000065 RCX: 00000000000000f0 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00007fdad058a758 RBP: 0000000000000001 R08: 0000000000800000 R09: 0000000000000010 R10: ed163e17b3f19c18 R11: 78776610b4bcba72 R12: 000055ed7ff7dea0 R13: 00007ffd69c51370 R14: 00007ffd69c51368 R15: 0000000000242540 FS: 00007fdad07a48c0(0000) GS:ffff8880aee00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fdacdb66000 CR3: 000000009537d000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400