watchdog: BUG: soft lockup - CPU#1 stuck for 22s! [syz-executor663:9338] Modules linked in: irq event stamp: 1513487 hardirqs last enabled at (1513486): [] __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:160 [inline] hardirqs last enabled at (1513486): [] _raw_spin_unlock_irqrestore+0x79/0xe0 kernel/locking/spinlock.c:184 hardirqs last disabled at (1513487): [] trace_hardirqs_off_thunk+0x1a/0x1c softirqs last enabled at (10466): [] __do_softirq+0x678/0x980 kernel/softirq.c:318 softirqs last disabled at (15797): [] invoke_softirq kernel/softirq.c:372 [inline] softirqs last disabled at (15797): [] irq_exit+0x215/0x260 kernel/softirq.c:412 CPU: 1 PID: 9338 Comm: syz-executor663 Not tainted 4.19.198-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:preempt_count_sub+0xc4/0x150 kernel/sched/core.c:3267 Code: 00 00 8b 15 de 6b f5 0b 85 d2 75 bd 48 c7 c6 80 ba 69 88 48 c7 c7 c0 ba 69 88 e8 37 d8 b0 06 0f 0b 5b c3 65 8b 05 8c 73 c0 7e <84> c0 75 8b e8 d3 f0 31 02 85 c0 74 92 48 c7 c0 40 d7 36 8d 48 ba RSP: 0018:ffff8880ba106de0 EFLAGS: 00000297 ORIG_RAX: ffffffffffffff13 RAX: 0000000000000102 RBX: 0000000000000001 RCX: 0000000000000000 RDX: 0000000000000004 RSI: ffffffff83772831 RDI: 0000000000000001 RBP: dffffc0000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000005 R11: 0000000000000000 R12: ffffffff89f88200 R13: ffffffff89f88200 R14: ffff8880ba106ec8 R15: 0000000000000001 FS: 00007fd572fdf700(0000) GS:ffff8880ba100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000485c00 CR3: 000000009e915000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: rcu_lockdep_current_cpu_online kernel/rcu/tree.c:1081 [inline] rcu_lockdep_current_cpu_online+0x12f/0x1b0 kernel/rcu/tree.c:1068 rcu_read_lock_held+0xc3/0x110 kernel/rcu/update.c:285 fib6_node_lookup_1+0x739/0x910 net/ipv6/ip6_fib.c:1415 fib6_node_lookup+0xbe/0x170 net/ipv6/ip6_fib.c:1485 fib6_table_lookup+0xb3/0xf40 net/ipv6/route.c:1869 ip6_pol_route+0x180/0x1270 net/ipv6/route.c:1909 fib6_rule_lookup+0x10b/0x4e0 net/ipv6/fib6_rules.c:118 ip6_route_output_flags+0x2b0/0x350 net/ipv6/route.c:2163 ip6_route_output include/net/ip6_route.h:88 [inline] ip6_dst_lookup_tail+0x104d/0x19b0 net/ipv6/ip6_output.c:990 ip6_dst_lookup_flow+0x8c/0x1d0 net/ipv6/ip6_output.c:1118 sctp_v6_get_dst+0x69f/0x1c90 net/sctp/ipv6.c:291 sctp_transport_route+0x125/0x350 net/sctp/transport.c:312 sctp_packet_config+0xbd8/0xe50 net/sctp/output.c:118 sctp_outq_select_transport+0x1e4/0x740 net/sctp/outqueue.c:878 sctp_outq_flush_ctrl.constprop.0+0x291/0xc40 net/sctp/outqueue.c:912 sctp_outq_flush net/sctp/outqueue.c:1205 [inline] sctp_outq_uncork+0x10b/0x200 net/sctp/outqueue.c:777 sctp_cmd_interpreter net/sctp/sm_sideeffect.c:1815 [inline] sctp_side_effects net/sctp/sm_sideeffect.c:1199 [inline] sctp_do_sm+0x72a/0x5110 net/sctp/sm_sideeffect.c:1170 sctp_generate_timeout_event+0x1bb/0x3a0 net/sctp/sm_sideeffect.c:310 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:qlink_to_object mm/kasan/quarantine.c:136 [inline] RIP: 0010:qlink_free mm/kasan/quarantine.c:141 [inline] RIP: 0010:qlist_free_all+0x32/0x140 mm/kasan/quarantine.c:166 Code: 55 53 48 8b 1f 48 85 db 0f 84 08 01 00 00 48 89 f5 49 89 fd 48 85 ed 49 89 ee 0f 84 8b 00 00 00 49 63 86 fc 00 00 00 4c 8b 23 <48> 29 c3 48 83 3d 93 21 59 08 00 0f 84 e6 00 00 00 9c 58 0f 1f 44 RSP: 0018:ffff88809ee27530 EFLAGS: 00000202 ORIG_RAX: ffffffffffffff13 RAX: 0000000000000000 RBX: ffff88809e145200 RCX: ffffea0002785100 RDX: 0000000000000001 RSI: ffffffff812b5e9a RDI: 0000000000000007 RBP: 0000000000000000 R08: ffffed1013c17a00 R09: 0000000000000000 R10: 0000000000000007 R11: 0000000000000000 R12: ffff88809dc55dc0 R13: ffff88809ee27568 R14: ffff88813bff0ac0 R15: 0000000000000282 quarantine_reduce+0x1a9/0x230 mm/kasan/quarantine.c:259 kasan_kmalloc+0xa2/0x160 mm/kasan/kasan.c:538 kmem_cache_alloc_trace+0x12f/0x380 mm/slab.c:3625 kmalloc include/linux/slab.h:515 [inline] kzalloc include/linux/slab.h:709 [inline] sctp_transport_new+0x71/0x710 net/sctp/transport.c:111 sctp_assoc_add_peer+0x2a6/0x1050 net/sctp/associola.c:636 sctp_sendmsg_new_asoc+0x580/0x1040 net/sctp/socket.c:1789 sctp_sendmsg+0x1146/0x1580 net/sctp/socket.c:2122 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_sendmsg+0x7bb/0x8e0 net/socket.c:2225 __sys_sendmsg net/socket.c:2263 [inline] __do_sys_sendmsg net/socket.c:2272 [inline] __se_sys_sendmsg net/socket.c:2270 [inline] __x64_sys_sendmsg+0x132/0x220 net/socket.c:2270 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x445819 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 11 15 00 00 90 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:00007fd572fdf318 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00000000004ca408 RCX: 0000000000445819 RDX: 0000000000000000 RSI: 0000000020001400 RDI: 0000000000000003 RBP: 00000000004ca400 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000004ca40c R13: 00007fffdc05205f R14: 00007fd572fdf400 R15: 0000000000022000