watchdog: BUG: soft lockup - CPU#1 stuck for 22s! [syz-executor.0:18622] Modules linked in: irq event stamp: 2408147 hardirqs last enabled at (2408146): [] trace_hardirqs_on_thunk+0x1a/0x1c hardirqs last disabled at (2408147): [] trace_hardirqs_off_thunk+0x1a/0x1c softirqs last enabled at (138): [] sock_orphan include/net/sock.h:1805 [inline] softirqs last enabled at (138): [] sk_common_release+0x12a/0x2d0 net/core/sock.c:3137 softirqs last disabled at (455): [] invoke_softirq kernel/softirq.c:372 [inline] softirqs last disabled at (455): [] irq_exit+0x215/0x260 kernel/softirq.c:412 CPU: 1 PID: 18622 Comm: syz-executor.0 Not tainted 4.19.211-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:__sanitizer_cov_trace_pc+0x0/0x50 kernel/kcov.c:97 Code: ff 48 89 df e8 11 dd 35 00 e9 ab fe ff ff 4c 89 ef e8 04 dd 35 00 e9 23 fe ff ff 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 <48> 8b 34 24 65 48 8b 04 25 c0 df 01 00 65 8b 15 cc 59 9f 7e 81 e2 RSP: 0000:ffff8880ba107ac0 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 RAX: 0000000000000101 RBX: 0000000000000000 RCX: ffffffff8674cc49 RDX: 0000000000000000 RSI: ffff88804d026440 RDI: 0000000000000001 RBP: ffff8880ba107c28 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000000 R12: ffff88802ac8c640 R13: ffff888098baa580 R14: 0000000000000011 R15: 0000000000000008 FS: 00007f9d3df02700(0000) GS:ffff8880ba100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000000 CR3: 000000002c47b000 CR4: 00000000003406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: netif_rx+0x61/0x2c0 net/core/dev.c:4516 __br_multicast_send_query+0x1006/0x2dc0 net/bridge/br_multicast.c:956 br_multicast_send_query+0x216/0x3a0 net/bridge/br_multicast.c:988 br_multicast_query_expired net/bridge/br_multicast.c:1942 [inline] br_ip4_multicast_query_expired+0xdc/0x110 net/bridge/br_multicast.c:1950 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: 0010:__get_user_8+0x0/0x2b arch/x86/lib/getuser.S:87 Code: 65 48 8b 14 25 c0 df 01 00 48 3b 82 98 14 00 00 73 43 48 19 d2 48 21 d0 0f 01 cb 8b 50 fd 31 c0 0f 01 ca c3 66 0f 1f 44 00 00 <48> 83 c0 07 72 25 65 48 8b 14 25 c0 df 01 00 48 3b 82 98 14 00 00 RSP: 0000:ffff88802dfe7a58 EFLAGS: 00000293 ORIG_RAX: ffffffffffffff13 RAX: 00007f9d3df029e0 RBX: 00007f9d3df029e0 RCX: 1ffff11009a04d9e RDX: 0000000000000000 RSI: ffffffff815826de RDI: 0000000000000286 RBP: ffff88804d0275d0 R08: ffffffff8cd19ab8 R09: 0000000000000001 R10: 0000000000000000 R11: 0000000000000000 R12: ffff88804d027528 R13: ffff88804d027550 R14: ffff88804d026440 R15: ffff88804d026440 fetch_robust_entry kernel/futex.c:3671 [inline] exit_robust_list+0x8b/0x2e0 kernel/futex.c:3702 futex_cleanup kernel/futex.c:3754 [inline] futex_exit_release+0x183/0x220 kernel/futex.c:3855 exit_mm_release+0x16/0x30 kernel/fork.c:1257 exit_mm kernel/exit.c:501 [inline] do_exit+0x6ba/0x2be0 kernel/exit.c:857 do_group_exit+0x125/0x310 kernel/exit.c:967 get_signal+0x3f2/0x1f70 kernel/signal.c:2589 do_signal+0x8f/0x1670 arch/x86/kernel/signal.c:799 exit_to_usermode_loop+0x204/0x2a0 arch/x86/entry/common.c:163 prepare_exit_to_usermode arch/x86/entry/common.c:198 [inline] syscall_return_slowpath arch/x86/entry/common.c:271 [inline] do_syscall_64+0x538/0x620 arch/x86/entry/common.c:296 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7f9d3f5f0049 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f9d3df02218 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca RAX: fffffffffffffe00 RBX: 00007f9d3f7031d8 RCX: 00007f9d3f5f0049 RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007f9d3f7031d8 RBP: 00007f9d3f7031d0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f9d3f7031dc R13: 00007ffd8f3c54ff R14: 00007f9d3df02300 R15: 0000000000022000 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), 1 bytes skipped: 0: 48 89 df mov %rbx,%rdi 3: e8 11 dd 35 00 callq 0x35dd19 8: e9 ab fe ff ff jmpq 0xfffffeb8 d: 4c 89 ef mov %r13,%rdi 10: e8 04 dd 35 00 callq 0x35dd19 15: e9 23 fe ff ff jmpq 0xfffffe3d 1a: 90 nop 1b: 90 nop 1c: 90 nop 1d: 90 nop 1e: 90 nop 1f: 90 nop 20: 90 nop 21: 90 nop 22: 90 nop 23: 90 nop 24: 90 nop 25: 90 nop 26: 90 nop 27: 90 nop 28: 90 nop * 29: 48 8b 34 24 mov (%rsp),%rsi <-- trapping instruction 2d: 65 48 8b 04 25 c0 df mov %gs:0x1dfc0,%rax 34: 01 00 36: 65 8b 15 cc 59 9f 7e mov %gs:0x7e9f59cc(%rip),%edx # 0x7e9f5a09 3d: 81 .byte 0x81 3e: e2 .byte 0xe2