watchdog: BUG: soft lockup - CPU#1 stuck for 22s! [syz-executor.2:8856] Modules linked in: irq event stamp: 3396551 hardirqs last enabled at (3396550): [] trace_hardirqs_on_thunk+0x1a/0x1c hardirqs last disabled at (3396551): [] trace_hardirqs_off_thunk+0x1a/0x1c softirqs last enabled at (16902): [] __do_softirq+0x678/0x980 kernel/softirq.c:318 softirqs last disabled at (17121): [] invoke_softirq kernel/softirq.c:372 [inline] softirqs last disabled at (17121): [] irq_exit+0x215/0x260 kernel/softirq.c:412 CPU: 1 PID: 8856 Comm: syz-executor.2 Not tainted 4.19.211-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:__ipv6_dev_get_saddr+0x2b3/0x5f0 net/ipv6/addrconf.c:1606 Code: fc ff df 48 89 f8 48 c1 e8 03 80 3c 08 00 0f 85 c8 02 00 00 48 b9 00 00 00 00 00 fc ff df 48 8b 44 24 08 48 8b 9b 40 01 00 00 <48> c1 e8 03 80 3c 08 00 48 8d ab c0 fe ff ff 0f 85 8e 02 00 00 48 RSP: 0000:ffff8880ba107548 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 RAX: ffff8880ba107640 RBX: ffff8880a1177b80 RCX: dffffc0000000000 RDX: 0000000000000100 RSI: ffffffff8704057b RDI: ffff888035b571c0 RBP: 00000000fffffff2 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000005 R11: 0000000000000000 R12: 0000000000000002 R13: ffff8880ba107638 R14: ffff8880a06c0040 R15: ffff8880ba1075f8 FS: 0000555555d37400(0000) GS:ffff8880ba100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b2e022000 CR3: 000000009f43b000 CR4: 00000000003406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: ipv6_dev_get_saddr+0x56c/0xc20 net/ipv6/addrconf.c:1774 ip6_route_get_saddr include/net/ip6_route.h:124 [inline] ip6_dst_lookup_tail+0x1233/0x19b0 net/ipv6/ip6_output.c:997 icmpv6_route_lookup+0x9e/0x4e0 net/ipv6/icmp.c:343 icmp6_send+0x1592/0x22c0 net/ipv6/icmp.c:555 __icmpv6_send include/linux/icmpv6.h:28 [inline] icmpv6_send include/linux/icmpv6.h:49 [inline] ip6_link_failure+0x2d/0x4f0 net/ipv6/route.c:2297 dst_link_failure include/net/dst.h:438 [inline] ndisc_error_report+0xc7/0x190 net/ipv6/ndisc.c:695 neigh_invalidate+0x22c/0x540 net/core/neighbour.c:900 neigh_timer_handler+0x9b2/0xc70 net/core/neighbour.c:986 call_timer_fn+0x177/0x700 kernel/time/timer.c:1338 expire_timers+0x243/0x4e0 kernel/time/timer.c:1375 __run_timers kernel/time/timer.c:1696 [inline] run_timer_softirq+0x21c/0x670 kernel/time/timer.c:1709 __do_softirq+0x265/0x980 kernel/softirq.c:292 invoke_softirq kernel/softirq.c:372 [inline] irq_exit+0x215/0x260 kernel/softirq.c:412 exiting_irq arch/x86/include/asm/apic.h:536 [inline] smp_apic_timer_interrupt+0x136/0x550 arch/x86/kernel/apic/apic.c:1098 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:894 RIP: 0033:0x7f32a0032081 Code: c7 44 24 08 00 00 00 00 41 89 ed 4c 8d 25 97 8f 15 00 eb 24 0f 1f 44 00 00 4c 89 ff e8 d8 18 ff ff 41 08 c5 0f 85 f7 01 00 00 <41> 83 c6 01 44 39 73 04 0f 86 b7 00 00 00 48 8b 04 24 44 89 f7 48 RSP: 002b:00007ffd303d7a00 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 RAX: 000000000283f250 RBX: 00007f32a01970c8 RCX: 0000001b2dd20000 RDX: 000000000283f250 RSI: 0000001b2dd210bc RDI: 0000000009f34895 RBP: 000000000283f250 R08: 0000000000001250 R09: 000000000283f254 R10: 00007ffd303d7bd0 R11: 0000000000000246 R12: 00007f32a018b000 R13: 0000000000000001 R14: 00000000000000a2 R15: ffffffff83772075 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 ---------------- Code disassembly (best guess), 2 bytes skipped: 0: df 48 89 fisttps -0x77(%rax) 3: f8 clc 4: 48 c1 e8 03 shr $0x3,%rax 8: 80 3c 08 00 cmpb $0x0,(%rax,%rcx,1) c: 0f 85 c8 02 00 00 jne 0x2da 12: 48 b9 00 00 00 00 00 movabs $0xdffffc0000000000,%rcx 19: fc ff df 1c: 48 8b 44 24 08 mov 0x8(%rsp),%rax 21: 48 8b 9b 40 01 00 00 mov 0x140(%rbx),%rbx * 28: 48 c1 e8 03 shr $0x3,%rax <-- trapping instruction 2c: 80 3c 08 00 cmpb $0x0,(%rax,%rcx,1) 30: 48 8d ab c0 fe ff ff lea -0x140(%rbx),%rbp 37: 0f 85 8e 02 00 00 jne 0x2cb 3d: 48 rex.W