watchdog: BUG: soft lockup - CPU#0 stuck for 134s! [syz-executor1:24439] Modules linked in: irq event stamp: 32096777 hardirqs last enabled at (32096776): [] slab_alloc_node mm/slab.c:3322 [inline] hardirqs last enabled at (32096776): [] kmem_cache_alloc_node_trace+0x22e/0x760 mm/slab.c:3654 hardirqs last disabled at (32096777): [] apic_timer_interrupt+0x98/0xb0 arch/x86/entry/entry_64.S:791 softirqs last enabled at (1908): [] spin_unlock_bh include/linux/spinlock.h:360 [inline] softirqs last enabled at (1908): [] __release_sock+0xca/0x360 net/core/sock.c:2257 softirqs last disabled at (1959): [] invoke_softirq kernel/softirq.c:365 [inline] softirqs last disabled at (1959): [] irq_exit+0x1d3/0x210 kernel/softirq.c:405 CPU: 0 PID: 24439 Comm: syz-executor1 Not tainted 4.14.0+ #126 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 task: ffff8801a877e580 task.stack: ffff880196850000 RIP: 0010:__kernel_text_address+0x29/0x40 kernel/extable.c:120 RSP: 0018:ffff8801db406cc8 EFLAGS: 00000202 ORIG_RAX: ffffffffffffff11 RAX: 0000000000000001 RBX: ffffffff8413e0e1 RCX: 0000000000000001 RDX: 1ffff1003b680da9 RSI: ffff8801db407038 RDI: ffffffff8413e0e1 RBP: ffff8801db406cd0 R08: ffff8801db406d40 R09: ffff8801a877e580 R10: 000000000000000b R11: ffffed003b680daa R12: ffff8801db406d48 R13: 0000000000000000 R14: ffff8801a877e580 R15: ffff8801db000940 FS: 00007fcff329a700(0000) GS:ffff8801db400000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000002085cfe4 CR3: 00000001cd50c000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: unwind_get_return_address+0x61/0xa0 arch/x86/kernel/unwind_frame.c:18 __save_stack_trace+0x7e/0xd0 arch/x86/kernel/stacktrace.c:45 save_stack_trace+0x1a/0x20 arch/x86/kernel/stacktrace.c:60 save_stack+0x43/0xd0 mm/kasan/kasan.c:447 set_track mm/kasan/kasan.c:459 [inline] kasan_kmalloc+0xad/0xe0 mm/kasan/kasan.c:551 __do_kmalloc_node mm/slab.c:3675 [inline] __kmalloc_node_track_caller+0x47/0x70 mm/slab.c:3689 __kmalloc_reserve.isra.41+0x41/0xd0 net/core/skbuff.c:137 __alloc_skb+0x13b/0x780 net/core/skbuff.c:205 alloc_skb include/linux/skbuff.h:981 [inline] _sctp_make_chunk+0x3b/0x260 net/sctp/sm_make_chunk.c:1383 sctp_make_control+0x39/0x150 net/sctp/sm_make_chunk.c:1424 sctp_make_heartbeat+0x88/0x400 net/sctp/sm_make_chunk.c:1148 sctp_sf_heartbeat.isra.15+0x26/0x180 net/sctp/sm_statefuns.c:970 sctp_sf_sendbeat_8_3+0x36b/0x520 net/sctp/sm_statefuns.c:1014 sctp_do_sm+0x18a/0x6a30 net/sctp/sm_sideeffect.c:1190 sctp_generate_heartbeat_event+0x295/0x3f0 net/sctp/sm_sideeffect.c:406 call_timer_fn+0x246/0x850 kernel/time/timer.c:1312 expire_timers kernel/time/timer.c:1351 [inline] __run_timers+0x7fd/0xb90 kernel/time/timer.c:1654 run_timer_softirq+0x4c/0xb0 kernel/time/timer.c:1680 __do_softirq+0x29d/0xbb2 kernel/softirq.c:285 invoke_softirq kernel/softirq.c:365 [inline] irq_exit+0x1d3/0x210 kernel/softirq.c:405 exiting_irq arch/x86/include/asm/apic.h:540 [inline] smp_apic_timer_interrupt+0x16b/0x700 arch/x86/kernel/apic/apic.c:1052 apic_timer_interrupt+0x9d/0xb0 arch/x86/entry/entry_64.S:791 RIP: 0010:inet6_sk include/linux/ipv6.h:329 [inline] RIP: 0010:sctp_v6_ecn_capable+0x79/0xd0 net/sctp/ipv6.c:752 RSP: 0018:ffff880196856438 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff11 RAX: dffffc0000000000 RBX: ffff8801cac95b50 RCX: ffffffff84baa592 RDX: 1ffff10039592b1a RSI: ffffc90003da9000 RDI: ffff8801cac958d0 RBP: ffff880196856448 R08: 0000000013b488db R09: 0000000000000000 R10: 0000000000000000 R11: ffff880104b24be8 R12: ffff8801cac95440 R13: ffff880104b14cb8 R14: 1ffff10032d0acfe R15: ffff8801c5eae2c8 sctp_packet_transmit+0x2062/0x3750 net/sctp/output.c:625 sctp_outq_flush+0x1216/0x4050 net/sctp/outqueue.c:1191 sctp_outq_uncork+0x5a/0x70 net/sctp/outqueue.c:772 sctp_cmd_interpreter net/sctp/sm_sideeffect.c:1822 [inline] sctp_side_effects net/sctp/sm_sideeffect.c:1222 [inline] sctp_do_sm+0x50e/0x6a30 net/sctp/sm_sideeffect.c:1193 sctp_assoc_bh_rcv+0x283/0x4b0 net/sctp/associola.c:1065 sctp_inq_push+0x23b/0x300 net/sctp/inqueue.c:95 sctp_backlog_rcv+0x177/0xaa0 net/sctp/input.c:350 sk_backlog_rcv include/net/sock.h:911 [inline] __release_sock+0x124/0x360 net/core/sock.c:2264 release_sock+0xa4/0x2a0 net/core/sock.c:2779 sctp_wait_for_connect+0x346/0x570 net/sctp/socket.c:8150 sctp_sendmsg+0x2977/0x3300 net/sctp/socket.c:2046 inet_sendmsg+0x11f/0x5e0 net/ipv4/af_inet.c:763 sock_sendmsg_nosec net/socket.c:632 [inline] sock_sendmsg+0xca/0x110 net/socket.c:642 SYSC_sendto+0x358/0x5a0 net/socket.c:1749 SyS_sendto+0x40/0x50 net/socket.c:1717 entry_SYSCALL_64_fastpath+0x1f/0x96 RIP: 0033:0x452879 RSP: 002b:00007fcff3299be8 EFLAGS: 00000212 ORIG_RAX: 000000000000002c RAX: ffffffffffffffda RBX: 0000000000758020 RCX: 0000000000452879 RDX: 0000000000034000 RSI: 0000000020832000 RDI: 0000000000000018 RBP: 0000000000000086 R08: 00000000205e4fe4 R09: 000000000000001c R10: 0000000000000000 R11: 0000000000000212 R12: 00000000006f1888 R13: 00000000ffffffff R14: 00007fcff329a6d4 R15: 0000000000000000 Code: 00 00 55 48 89 e5 53 48 89 fb e8 b3 fe ff ff 85 c0 75 18 48 81 fb 00 90 63 86 72 0c 31 c0 48 81 fb 62 01 77 86 0f 92 c0 5b 5d c3 01 00 00 00 5b 5d c3 0f 1f 44 00 00 66 2e 0f 1f 84 00 00 00