watchdog: BUG: soft lockup - CPU#0 stuck for 23s! [syz-executor.5:24201] Modules linked in: irq event stamp: 2634139 hardirqs last enabled at (2634138): [] trace_hardirqs_on_thunk+0x1a/0x1c hardirqs last disabled at (2634139): [] trace_hardirqs_off_thunk+0x1a/0x1c softirqs last enabled at (1511326): [] __do_softirq+0x678/0x980 kernel/softirq.c:318 softirqs last disabled at (1511329): [] invoke_softirq kernel/softirq.c:372 [inline] softirqs last disabled at (1511329): [] irq_exit+0x215/0x260 kernel/softirq.c:412 CPU: 0 PID: 24201 Comm: syz-executor.5 Not tainted 4.19.211-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:__kmalloc_node_track_caller+0x4d/0x70 mm/slab.c:3704 Code: 89 c5 76 3e 44 89 f2 4c 89 e1 44 89 ee 48 89 c7 e8 18 fc ff ff 44 89 e9 4c 89 e2 48 89 ef 48 89 c6 49 89 c6 e8 64 32 00 00 5d <4c> 89 f0 41 5c 41 5d 41 5e c3 45 31 f6 5d 4c 89 f0 41 5c 41 5d 41 RSP: 0000:ffff8880ba007a48 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff13 RAX: 00000000b0000359 RBX: 0000000000000002 RCX: 0000000000000000 RDX: ffffffff88400265 RSI: 000000000000000a RDI: 0000000000000000 RBP: 0000000000000200 R08: 0000000000490220 R09: 0000000000000002 R10: 0000000056bbc423 R11: 000000004f994b9c R12: 0000000000000200 R13: 0000000000490220 R14: ffff88804e5312c0 R15: ffff88804e530940 FS: 000055555573c400(0000) GS:ffff8880ba000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fc1a34a4f64 CR3: 0000000096d34000 CR4: 00000000003406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __kmalloc_reserve net/core/skbuff.c:137 [inline] __alloc_skb+0xae/0x560 net/core/skbuff.c:205 __netdev_alloc_skb+0x76/0x460 net/core/skbuff.c:407 __netdev_alloc_skb_ip_align include/linux/skbuff.h:2700 [inline] netdev_alloc_skb_ip_align include/linux/skbuff.h:2710 [inline] br_ip6_multicast_alloc_query net/bridge/br_multicast.c:479 [inline] br_multicast_alloc_query net/bridge/br_multicast.c:585 [inline] __br_multicast_send_query+0x1a7/0x2dc0 net/bridge/br_multicast.c:941 br_multicast_send_query+0x216/0x3a0 net/bridge/br_multicast.c:988 br_multicast_query_expired net/bridge/br_multicast.c:1942 [inline] br_ip6_multicast_query_expired+0xdc/0x110 net/bridge/br_multicast.c:1958 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:preempt_schedule_irq+0xa6/0x140 kernel/sched/core.c:3744 Code: 00 00 e8 3d 04 29 f9 e8 58 3f 4f f9 4c 89 e8 48 c1 e8 03 80 3c 18 00 75 69 48 83 3d 9b 18 d9 01 00 74 5b fb 66 0f 1f 44 00 00 01 00 00 00 e8 40 d1 ff ff 48 c7 c0 90 82 f1 89 48 c1 e8 03 80 RSP: 0000:ffff88804e45fe20 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13 RAX: 1ffffffff13e3053 RBX: dffffc0000000000 RCX: 0000000000000000 RDX: 0000000000000000 RSI: 0000000000000001 RDI: ffff88804b4b8a04 RBP: ffffed1009697030 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: ffff88804b4b8180 R13: ffffffff89f18298 R14: 0000000000000000 R15: 0000000000000000 retint_kernel+0x1b/0x2d RIP: 0010:exit_to_usermode_loop+0x65/0x2a0 arch/x86/entry/common.c:152 Code: f1 89 48 c1 e8 03 80 3c 28 00 0f 85 0b 02 00 00 48 83 3d a5 2a f1 08 00 0f 84 e0 01 00 00 e8 72 2d 62 00 fb 66 0f 1f 44 00 00 <41> 89 df 31 ff 41 83 e7 08 44 89 fe e8 ca 2e 62 00 45 85 ff 0f 85 RSP: 0000:ffff88804e45fef8 EFLAGS: 00000293 ORIG_RAX: ffffffffffffff13 RAX: ffff88804b4b8180 RBX: 0000000000000008 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffffffff810057fe RDI: ffff88804b4b8a04 RBP: dffffc0000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: ffff88804e45ff58 R13: ffffed1009697030 R14: ffff88804b4b8180 R15: 0000000000000000 prepare_exit_to_usermode+0x277/0x2d0 arch/x86/entry/common.c:198 retint_user+0x8/0x18 RIP: 0033:0x7f6ceb8ced45 Code: 0f 1f 44 00 00 49 89 dd 48 39 cf 72 2f 48 83 e8 08 48 39 d1 73 14 0f 1f 80 00 00 00 00 48 8b 50 f8 48 83 e8 08 48 39 ca 77 f3 <48> 39 c3 73 3e 48 89 13 48 8b 50 f8 48 89 38 49 8b 0e 48 8b 3e 48 RSP: 002b:00007ffc162124e0 EFLAGS: 00000287 ORIG_RAX: ffffffffffffff13 RAX: 00007f6ceb69a310 RBX: 00007f6ceb699e80 RCX: ffffffff8175c8c2 RDX: ffffffff816d110d RSI: 00007f6ceb699e88 RDI: ffffffff818aec08 RBP: 00007f6ceb698ea0 R08: 00007f6ceb69bf48 R09: 00000000ee5a3a10 R10: 00007ffc16212730 R11: 0000000000000246 R12: 00007f6ceb698e98 R13: 00007f6ceb699e80 R14: 00007f6ceb698e90 R15: 0000000000000013 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 24220 Comm: syz-executor.4 Not tainted 4.19.211-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:native_apic_mem_write+0x8/0x10 arch/x86/include/asm/apic.h:109 Code: 3d cc 17 3d 0b 01 7f 02 5d c3 89 ef 5d e9 f5 fe c9 06 48 c7 c7 00 97 65 8c e8 84 e2 6f 00 eb df 66 90 89 ff 89 b7 00 c0 5f ff 0f 1f 80 00 00 00 00 48 b8 00 00 00 00 00 fc ff df 53 89 fb 48 RSP: 0018:ffff8880ba107e98 EFLAGS: 00000046 RAX: dffffc0000000000 RBX: ffffffff89cfb1a0 RCX: 0000000000000020 RDX: 1ffffffff139f636 RSI: 0000000000000168 RDI: 0000000000000380 RBP: ffff8880ba11e2c0 R08: ffffffff8c665058 R09: 0000000000000000 R10: 0000000000000007 R11: ffffffff8c66505b R12: 0000000000000168 R13: 0000000000000000 R14: ffff8880ba124cc0 R15: ffff8880ba124d30 FS: 00007efd2909e700(0000) GS:ffff8880ba100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020e7c000 CR3: 000000003c5fb000 CR4: 00000000003406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: apic_write arch/x86/include/asm/apic.h:389 [inline] lapic_next_event+0x4d/0x80 arch/x86/kernel/apic/apic.c:460 clockevents_program_event+0x234/0x350 kernel/time/clockevents.c:344 tick_program_event+0xac/0x140 kernel/time/tick-oneshot.c:48 hrtimer_interrupt+0x40a/0x9e0 kernel/time/hrtimer.c:1598 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1071 [inline] smp_apic_timer_interrupt+0x10c/0x550 arch/x86/kernel/apic/apic.c:1096 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:894 RIP: 0010:orc_ip arch/x86/kernel/unwind_orc.c:26 [inline] RIP: 0010:__orc_find+0x6f/0xf0 arch/x86/kernel/unwind_orc.c:48 Code: 72 4d 4c 89 e0 48 29 e8 48 89 c2 48 c1 e8 3f 48 c1 fa 02 48 01 d0 48 d1 f8 48 8d 5c 85 00 48 89 d8 48 c1 e8 03 42 0f b6 14 38 <48> 89 d8 83 e0 07 83 c0 03 38 d0 7c 04 84 d2 75 48 48 63 03 48 01 RSP: 0018:ffff8880966175d8 EFLAGS: 00000a03 ORIG_RAX: ffffffffffffff13 RAX: 1ffffffff16f562c RBX: ffffffff8b7ab164 RCX: ffffffff86d81549 RDX: 0000000000000000 RSI: ffffffff8bfc6688 RDI: ffffffff8b7ab164 RBP: ffffffff8b7ab164 R08: 0000000000000000 R09: ffffffff8bfc6688 R10: ffff8880966177af R11: 0000000000074071 R12: ffffffff8b7ab164 R13: ffffffff8b7ab164 R14: ffffffff8b7ab164 R15: dffffc0000000000 orc_find arch/x86/kernel/unwind_orc.c:159 [inline] unwind_next_frame+0x339/0x1400 arch/x86/kernel/unwind_orc.c:422 __save_stack_trace+0x9f/0x190 arch/x86/kernel/stacktrace.c:44 save_stack mm/kasan/kasan.c:448 [inline] set_track mm/kasan/kasan.c:460 [inline] kasan_kmalloc+0xeb/0x160 mm/kasan/kasan.c:553 __do_kmalloc_node mm/slab.c:3689 [inline] __kmalloc_node_track_caller+0x4c/0x70 mm/slab.c:3703 __kmalloc_reserve net/core/skbuff.c:137 [inline] __alloc_skb+0xae/0x560 net/core/skbuff.c:205 alloc_skb_fclone include/linux/skbuff.h:1037 [inline] sk_stream_alloc_skb+0xba/0x850 net/ipv4/tcp.c:884 tcp_sendmsg_locked+0xc0b/0x2f60 net/ipv4/tcp.c:1312 tcp_sendmsg+0x2b/0x40 net/ipv4/tcp.c:1462 inet_sendmsg+0x132/0x5a0 net/ipv4/af_inet.c:798 sock_sendmsg_nosec net/socket.c:651 [inline] sock_sendmsg+0xc3/0x120 net/socket.c:661 __sys_sendto+0x21a/0x320 net/socket.c:1899 __do_sys_sendto net/socket.c:1911 [inline] __se_sys_sendto net/socket.c:1907 [inline] __x64_sys_sendto+0xdd/0x1b0 net/socket.c:1907 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7efd2a728e99 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 bc ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007efd2909e168 EFLAGS: 00000246 ORIG_RAX: 000000000000002c RAX: ffffffffffffffda RBX: 00007efd2a83bf60 RCX: 00007efd2a728e99 RDX: ffffffffffffffef RSI: 0000000020d7cfcb RDI: 0000000000000004 RBP: 00007efd2a782ff1 R08: 0000000000000000 R09: 0000000000000053 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffec4caa2ff R14: 00007efd2909e300 R15: 0000000000022000 ---------------- Code disassembly (best guess): 0: 89 c5 mov %eax,%ebp 2: 76 3e jbe 0x42 4: 44 89 f2 mov %r14d,%edx 7: 4c 89 e1 mov %r12,%rcx a: 44 89 ee mov %r13d,%esi d: 48 89 c7 mov %rax,%rdi 10: e8 18 fc ff ff callq 0xfffffc2d 15: 44 89 e9 mov %r13d,%ecx 18: 4c 89 e2 mov %r12,%rdx 1b: 48 89 ef mov %rbp,%rdi 1e: 48 89 c6 mov %rax,%rsi 21: 49 89 c6 mov %rax,%r14 24: e8 64 32 00 00 callq 0x328d 29: 5d pop %rbp * 2a: 4c 89 f0 mov %r14,%rax <-- trapping instruction 2d: 41 5c pop %r12 2f: 41 5d pop %r13 31: 41 5e pop %r14 33: c3 retq 34: 45 31 f6 xor %r14d,%r14d 37: 5d pop %rbp 38: 4c 89 f0 mov %r14,%rax 3b: 41 5c pop %r12 3d: 41 5d pop %r13 3f: 41 rex.B