watchdog: BUG: soft lockup - CPU#1 stuck for 134s! [syz-executor2:7763] Modules linked in: irq event stamp: 29375757 hardirqs last enabled at (29375756): [] __local_bh_enable_ip+0x121/0x230 kernel/softirq.c:187 hardirqs last disabled at (29375757): [] apic_timer_interrupt+0x98/0xb0 arch/x86/entry/entry_64.S:791 softirqs last enabled at (3404): [] __do_softirq+0x733/0xbb2 kernel/softirq.c:311 softirqs last disabled at (3413): [] invoke_softirq kernel/softirq.c:365 [inline] softirqs last disabled at (3413): [] irq_exit+0x1d3/0x210 kernel/softirq.c:405 CPU: 1 PID: 7763 Comm: syz-executor2 Not tainted 4.14.0+ #126 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 task: ffff8801c8d5c240 task.stack: ffff8801d8848000 RIP: 0010:get_current arch/x86/include/asm/current.h:15 [inline] RIP: 0010:__sanitizer_cov_trace_pc+0xa/0x50 kernel/kcov.c:100 RSP: 0018:ffff8801db506620 EFLAGS: 00000202 ORIG_RAX: ffffffffffffff11 RAX: ffff8801c8d5c240 RBX: ffff8801d36aca80 RCX: ffffffff84bb03b3 RDX: 0000000000000100 RSI: ffff8801d36acaa0 RDI: ffff8801db51afec RBP: ffff8801db506980 R08: 0000000000000003 R09: ffffffff84bb0109 R10: 0000000000000000 R11: ffffffff87469d60 R12: ffff8801c6016e90 R13: dffffc0000000000 R14: ffffed003b6a0cea R15: ffff88019544d6c0 FS: 0000000000ea8940(0000) GS:ffff8801db500000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020001fe8 CR3: 0000000005e25000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: sctp_transport_route+0xa8/0x430 net/sctp/transport.c:284 sctp_packet_config+0x869/0xc80 net/sctp/output.c:106 sctp_outq_flush+0x7c7/0x4050 net/sctp/outqueue.c:890 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_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:arch_local_irq_restore arch/x86/include/asm/paravirt.h:777 [inline] RIP: 0010:lock_release+0x68d/0xda0 kernel/locking/lockdep.c:4026 RSP: 0018:ffff8801d884ee50 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff11 RAX: dffffc0000000000 RBX: 1ffff1003b109dcf RCX: ffff8801c8d5cb28 RDX: 1ffffffff0bd96a9 RSI: 0000000000000002 RDI: 0000000000000286 RBP: ffff8801d884efc0 R08: 0000000000000001 R09: 1ffff1003b109dd3 R10: ffff8801c8d5c240 R11: 0000000000000001 R12: ffff8801d884ee98 R13: ffff8801c8d5c240 R14: 3f862f38788d206f R15: 0000000000000003 rcu_lock_release include/linux/rcupdate.h:249 [inline] rcu_read_unlock include/linux/rcupdate.h:687 [inline] __unlock_page_memcg+0x72/0x100 mm/memcontrol.c:1697 unlock_page_memcg+0x2c/0x40 mm/memcontrol.c:1706 page_remove_file_rmap mm/rmap.c:1247 [inline] page_remove_rmap+0x3b7/0xcb0 mm/rmap.c:1298 zap_pte_range mm/memory.c:1334 [inline] zap_pmd_range mm/memory.c:1438 [inline] zap_pud_range mm/memory.c:1467 [inline] zap_p4d_range mm/memory.c:1488 [inline] unmap_page_range+0xfc3/0x22e0 mm/memory.c:1509 unmap_single_vma+0x15f/0x2d0 mm/memory.c:1554 unmap_vmas+0xf1/0x1b0 mm/memory.c:1584 exit_mmap+0x232/0x530 mm/mmap.c:3018 __mmput kernel/fork.c:924 [inline] mmput+0x223/0x6d0 kernel/fork.c:945 exit_mm kernel/exit.c:544 [inline] do_exit+0x90a/0x1ae0 kernel/exit.c:852 do_group_exit+0x149/0x400 kernel/exit.c:968 SYSC_exit_group kernel/exit.c:979 [inline] SyS_exit_group+0x1d/0x20 kernel/exit.c:977 entry_SYSCALL_64_fastpath+0x1f/0x96 RIP: 0033:0x452879 RSP: 002b:0000000000a6fa08 EFLAGS: 00000202 ORIG_RAX: 00000000000000e7 RAX: ffffffffffffffda RBX: 0000000000ea8914 RCX: 0000000000452879 RDX: 0000000000000000 RSI: 00000000007664a0 RDI: 0000000000000000 RBP: 0000000000000086 R08: 0000000000000000 R09: 0000000000000000 R10: 000000000000001e R11: 0000000000000202 R12: 0000000000a6f9b0 R13: 0000000000758020 R14: 0000000000000390 R15: 000000000000001e Code: 32 fd ff ff 48 8b bd d0 fe ff ff e8 f1 68 36 00 e9 c3 fc ff ff 90 90 90 90 90 90 90 90 90 90 90 90 55 65 48 8b 04 25 80 65 01 00 <48> 89 e5 65 8b 15 bc b5 91 7e 81 e2 00 01 1f 00 48 8b 4d 08 75