batman_adv: batadv0: Interface activated: batadv_slave_1 IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready watchdog: BUG: soft lockup - CPU#0 stuck for 22s! [syz-executor.5:9519] Modules linked in: irq event stamp: 3739085 hardirqs last enabled at (3739084): [] restore_regs_and_return_to_kernel+0x0/0x2a hardirqs last disabled at (3739085): [] apic_timer_interrupt+0x8e/0xa0 arch/x86/entry/entry_64.S:793 softirqs last enabled at (268): [] __do_softirq+0x68b/0x9ff kernel/softirq.c:314 softirqs last disabled at (2127): [] invoke_softirq kernel/softirq.c:368 [inline] softirqs last disabled at (2127): [] irq_exit+0x193/0x240 kernel/softirq.c:409 CPU: 0 PID: 9519 Comm: syz-executor.5 Not tainted 4.14.282-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 task: ffff888098f046c0 task.stack: ffff88808da88000 RIP: 0010:check_preemption_disabled+0x4/0x240 lib/smp_processor_id.c:13 RSP: 0018:ffff8880ba407790 EFLAGS: 00000206 ORIG_RAX: ffffffffffffff10 RAX: ffff888098f046c0 RBX: ffffffff893d2840 RCX: 0000000000000001 RDX: 0000000000000100 RSI: ffffffff87cd0000 RDI: ffffffff87cd0040 RBP: ffff888098f046c0 R08: ffffffff8b9cb8f0 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: ffffffff88563520 R13: ffffffff8c9a0260 R14: ffff888097180cf0 R15: ffff8880985a9680 FS: 0000555556cb7400(0000) GS:ffff8880ba400000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000000 CR3: 0000000098f56000 CR4: 00000000003406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: rcu_dynticks_curr_cpu_in_eqs kernel/rcu/tree.c:360 [inline] rcu_is_watching+0x11/0xb0 kernel/rcu/tree.c:1130 rcu_read_lock_sched_held+0xc6/0x1d0 kernel/rcu/update.c:111 trace_timer_init include/trace/events/timer.h:33 [inline] debug_init kernel/time/timer.c:738 [inline] init_timer_key+0x24e/0x300 kernel/time/timer.c:781 neigh_alloc net/core/neighbour.c:336 [inline] __neigh_create+0x456/0x19c0 net/core/neighbour.c:499 ip6_finish_output2+0x802/0x1f10 net/ipv6/ip6_output.c:117 ip6_finish_output+0x5c6/0xd50 net/ipv6/ip6_output.c:192 NF_HOOK_COND include/linux/netfilter.h:239 [inline] ip6_output+0x1c5/0x660 net/ipv6/ip6_output.c:209 dst_output include/net/dst.h:470 [inline] NF_HOOK include/linux/netfilter.h:250 [inline] ndisc_send_skb+0x82a/0x1390 net/ipv6/ndisc.c:483 ndisc_send_rs+0x125/0x630 net/ipv6/ndisc.c:677 addrconf_rs_timer+0x2bb/0x5a0 net/ipv6/addrconf.c:3773 call_timer_fn+0x14a/0x650 kernel/time/timer.c:1280 expire_timers+0x232/0x4d0 kernel/time/timer.c:1319 __run_timers kernel/time/timer.c:1637 [inline] run_timer_softirq+0x1d5/0x5a0 kernel/time/timer.c:1650 __do_softirq+0x24d/0x9ff kernel/softirq.c:288 invoke_softirq kernel/softirq.c:368 [inline] irq_exit+0x193/0x240 kernel/softirq.c:409 exiting_irq arch/x86/include/asm/apic.h:638 [inline] smp_apic_timer_interrupt+0x141/0x5e0 arch/x86/kernel/apic/apic.c:1106 apic_timer_interrupt+0x93/0xa0 arch/x86/entry/entry_64.S:793 RIP: 0010:__close_fd+0x66/0x230 fs/file.c:630 RSP: 0018:ffff88808da8fea8 EFLAGS: 00000202 ORIG_RAX: ffffffffffffff10 RAX: 0000000000000001 RBX: ffff8880b3b7da00 RCX: 0000000000000001 RDX: dffffc0000000000 RSI: 00000000ffffffff RDI: 0000000000000282 RBP: ffff88809b277400 R08: ffffffff8b9c9dd8 R09: 00000000000400a1 R10: ffff888098f04f48 R11: ffff888098f046c0 R12: 0000000000000003 R13: ffff88808da8ffd0 R14: ffff88809b2774c0 R15: 0000000000000000 SYSC_close fs/open.c:1177 [inline] SyS_close+0x42/0x90 fs/open.c:1175 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x46/0xbb RIP: 0033:0x7f1426c6dd4b RSP: 002b:00007ffe70766630 EFLAGS: 00000293 ORIG_RAX: 0000000000000003 RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 00007f1426c6dd4b RDX: 00007f1426dd2b70 RSI: ffffffffffffffff RDI: 0000000000000003 RBP: 00007f1426dcdf60 R08: 0000000000000000 R09: 00007f1426dd2b78 R10: ffffffffffffffff R11: 0000000000000293 R12: 00007f1426dcdf6c R13: 00007f1426dd2b70 R14: 00007f1426dcdf60 R15: 0000000000000000 Code: 64 fe e9 4e ef ff ff e8 6b fa 64 fe e9 46 fb ff ff e8 91 3f 3b fe 4d 89 e5 48 89 ac 24 c8 00 00 00 e9 d7 fb ff ff 90 41 57 41 56 <41> 55 49 89 f5 41 54 55 48 89 fd 53 e8 6b 3f 3b fe 65 44 8b 25 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 5 Comm: kworker/u4:0 Not tainted 4.14.282-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: bat_events batadv_purge_orig task: ffff8880b5fee140 task.stack: ffff8880b5400000 RIP: 0010:lock_release+0x27/0x870 kernel/locking/lockdep.c:4007 RSP: 0018:ffff8880b5407c18 EFLAGS: 00000296 RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000006ce3 RDX: ffffffff86ec42a0 RSI: 0000000000000001 RDI: ffff88808cd83188 RBP: ffff88808cd83188 R08: ffffffff8b9dc1d8 R09: 00000000000405e4 R10: ffff8880b5feea18 R11: ffff8880b5fee140 R12: ffffffff86ec42a0 R13: ffff8880b5fa9f00 R14: ffff88813fe468c0 R15: ffff8880a4a51400 FS: 0000000000000000(0000) GS:ffff8880ba500000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fff93083c10 CR3: 00000000a4377000 CR4: 00000000003406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __raw_spin_unlock_bh include/linux/spinlock_api_smp.h:174 [inline] _raw_spin_unlock_bh+0x17/0x30 kernel/locking/spinlock.c:208 spin_unlock_bh include/linux/spinlock.h:362 [inline] _batadv_purge_orig+0x400/0xef0 net/batman-adv/originator.c:1325 batadv_purge_orig+0x17/0x60 net/batman-adv/originator.c:1338 process_one_work+0x793/0x14a0 kernel/workqueue.c:2117 worker_thread+0x5cc/0xff0 kernel/workqueue.c:2251 kthread+0x30d/0x420 kernel/kthread.c:232 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:404 Code: 0f 1f 40 00 48 b8 00 00 00 00 00 fc ff df 41 57 41 56 41 55 41 54 49 89 d4 55 48 89 fd 53 48 83 ec 58 48 c7 44 24 18 b3 8a b5 41 <48> 8d 5c 24 18 48 c7 44 24 20 8c eb b5 88 48 c1 eb 03 48 c7 44 ---------------- Code disassembly (best guess): 0: 64 fe fs (bad) 2: e9 4e ef ff ff jmpq 0xffffef55 7: e8 6b fa 64 fe callq 0xfe64fa77 c: e9 46 fb ff ff jmpq 0xfffffb57 11: e8 91 3f 3b fe callq 0xfe3b3fa7 16: 4d 89 e5 mov %r12,%r13 19: 48 89 ac 24 c8 00 00 mov %rbp,0xc8(%rsp) 20: 00 21: e9 d7 fb ff ff jmpq 0xfffffbfd 26: 90 nop 27: 41 57 push %r15 29: 41 56 push %r14 * 2b: 41 55 push %r13 <-- trapping instruction 2d: 49 89 f5 mov %rsi,%r13 30: 41 54 push %r12 32: 55 push %rbp 33: 48 89 fd mov %rdi,%rbp 36: 53 push %rbx 37: e8 6b 3f 3b fe callq 0xfe3b3fa7 3c: 65 gs 3d: 44 rex.R 3e: 8b .byte 0x8b 3f: 25 .byte 0x25