panic: Bad tailq NEXT(0xfffffe00954d7d20->tqh_last) != NULL cpuid = 0 time = 1623827817 KDB: stack backtrace: db_trace_self_wrapper() at db_trace_self_wrapper+0x47/frame 0xfffffe00a871b470 vpanic() at vpanic+0x1cc/frame 0xfffffe00a871b4d0 panic() at panic+0x43/frame 0xfffffe00a871b530 sctp_ss_default_add() at sctp_ss_default_add+0x132/frame 0xfffffe00a871b570 sctp_lower_sosend() at sctp_lower_sosend+0x5523/frame 0xfffffe00a871b760 sctp_sosend() at sctp_sosend+0x49b/frame 0xfffffe00a871b8a0 sosend() at sosend+0xc6/frame 0xfffffe00a871b910 kern_sendit() at kern_sendit+0x33c/frame 0xfffffe00a871b9c0 freebsd32_sendmsg() at freebsd32_sendmsg+0x270/frame 0xfffffe00a871bab0 ia32_syscall() at ia32_syscall+0x23a/frame 0xfffffe00a871bbf0 int0x80_syscall_common() at int0x80_syscall_common+0x9c/frame 0xfbffcf78 KDB: enter: panic [ thread pid 6513 tid 215808 ] Stopped at kdb_enter+0x67: movq $0,0x164006e(%rip) db> db> set $lines = 0 db> set $maxwidth = 0 db> show registers cs 0x20 ds 0x3b es 0x3b fs 0x13 gs 0x1b ss 0 rax 0x12 rcx 0xfffffe0096600000 rdx 0x3ffff rbx 0 rsp 0xfffffe00a871b450 rbp 0xfffffe00a871b470 rsi 0x40001 rdi 0xffffffff81132836 vprintf+0x176 r8 0 r9 0x8080808080808080 r10 0xfffffe00a871b340 r11 0x1ff57fff59c r12 0xffffffff82267d30 ddb_dbbe r13 0xffffffff82ed9800 _refcount_update_saturated+0xa50 r14 0xffffffff81a73ed0 r15 0xffffffff81a73ed0 rip 0xffffffff81129897 kdb_enter+0x67 rflags 0x200082 kernload+0x82 kdb_enter+0x67: movq $0,0x164006e(%rip) db> show proc Process 6513 (syz-executor.1) at 0xfffff80074207a60: state: NORMAL uid: 0 gids: 0, 0, 5 parent: pid 785 at 0xfffff80050ab1000 ABI: FreeBSD ELF32 flag: 0x10080480 flag2: 0 arguments: /root/syz-executor.1 reaper: 0xfffff80004bd7530 reapsubtree: 1 sigparent: 20 vmspace: 0xfffffe009ebf23e0 (map 0xfffffe009ebf23e0) (map.pmap 0xfffffe009ebf24a0) (pmap 0xfffffe009ebf2500) threads: 3 213576 s syz-executor.1 215808 Run CPU 0 syz-executor.1 215810 RunQ syz-executor.1 db> ps pid ppid pgrp uid state wmesg wchan cmd 6519 813 813 0 R (threaded) syz-executor.3 212658 RunQ syz-executor.3 215821 RunQ syz-executor.3 215822 S uwait 0xfffff8007ab41100 syz-executor.3 6515 808 808 0 T (threaded) syz-executor.2 214375 s syz-executor.2 215814 RunQ syz-executor.2 215815 RunQ syz-executor.2 215816 RunQ syz-executor.2 215817 RunQ syz-executor.2 215827 RunQ syz-executor.2 6513 785 785 0 T (threaded) syz-executor.1 213576 s syz-executor.1 215808 Run CPU 0 syz-executor.1 215810 RunQ syz-executor.1 4399 4398 784 0 SV uwait 0xfffff8001bd64500 syz-executor.0 4398 1 784 0 DV ppwait 0xfffff8001bf91f40 syz-executor.0 3960 1 785 0 S uwait 0xfffff8007abd8900 syz-executor.1 3953 1 785 0 S uwait 0xfffff8001bd64700 syz-executor.1 3950 1 785 0 S uwait 0xfffff8001b9c5100 syz-executor.1 3948 1 785 0 S uwait 0xfffff800082bc500 syz-executor.1 3944 1 785 0 S uwait 0xfffff8007abde700 syz-executor.1 3942 1 785 0 S uwait 0xfffff8001bd64300 syz-executor.1 3939 1 785 0 S uwait 0xfffff800082bcd00 syz-executor.1 3933 1 785 0 S uwait 0xfffff8007abd8d00 syz-executor.1 3930 1 785 0 S uwait 0xfffff8001bd64100 syz-executor.1 3928 1 785 0 S uwait 0xfffff8001bd64f00 syz-executor.1 3925 1 785 0 S uwait 0xfffff8005d307100 syz-executor.1 3921 1 785 0 S uwait 0xfffff8007abd8f00 syz-executor.1 3916 1 785 0 S uwait 0xfffff8000824d300 syz-executor.1 3911 1 785 0 S uwait 0xfffff8000824df00 syz-executor.1 3907 1 785 0 S uwait 0xfffff8007abd8b00 syz-executor.1 3905 1 785 0 S uwait 0xfffff8001bd64b00 syz-executor.1 3903 1 785 0 S uwait 0xfffff800082bcf00 syz-executor.1 3900 1 785 0 S uwait 0xfffff800082bcb00 syz-executor.1 3895 1 785 0 S uwait 0xfffff8000824d100 syz-executor.1 3893 1 785 0 S uwait 0xfffff800082bc700 syz-executor.1 3890 1 785 0 S uwait 0xfffff800082bc900 syz-executor.1 3886 1 785 0 S uwait 0xfffff8001b9c5900 syz-executor.1 3879 1 785 0 S uwait 0xfffff8001ccd4500 syz-executor.1 3875 1 785 0 S uwait 0xfffff800082bc300 syz-executor.1 3873 1 785 0 S uwait 0xfffff800082bc100 syz-executor.1 3868 1 785 0 S uwait 0xfffff8001b9c5500 syz-executor.1 3865 1 785 0 S uwait 0xfffff8000824dd00 syz-executor.1 3861 1 785 0 S uwait 0xfffff8001ccd4b00 syz-executor.1 3859 1 785 0 S uwait 0xfffff8001ccd4900 syz-executor.1 3855 1 785 0 S uwait 0xfffff8007ad46700 syz-executor.1 3854 1 813 0 S uwait 0xfffff8001ccd4700 syz-executor.3 3852 1 785 0 S uwait 0xfffff8006d972700 syz-executor.1 3846 1 785 0 S uwait 0xfffff8005d307b00 syz-executor.1 3844 1 813 0 S uwait 0xfffff8000824db00 syz-executor.3 3840 1 785 0 S uwait 0xfffff8000824d900 syz-executor.1 3838 1 813 0 S uwait 0xfffff8001ccd4300 syz-executor.3 3836 1 785 0 S uwait 0xfffff8001b9c5700 syz-executor.1 3833 1 813 0 S uwait 0xfffff8000824d700 syz-executor.3 3828 1 784 0 S uwait 0xfffff8007ad46b00 syz-executor.0 3826 1 785 0 S uwait 0xfffff8001ccd4100 syz-executor.1 3825 1 813 0 S uwait 0xfffff8007ad46900 syz-executor.3 3824 1 808 0 S uwait 0xfffff8007ad46f00 syz-executor.2 3819 1 808 0 S uwait 0xfffff8005d307900 syz-executor.2 3818 1 813 0 S uwait 0xfffff80076f5c900 syz-executor.3 3815 1 785 0 S uwait 0xfffff80076f5c700 syz-executor.1 3814 1 808 0 S uwait 0xfffff8007ad46d00 syz-executor.2 3813 1 813 0 S uwait 0xfffff8006d972900 syz-executor.3 3811 1 808 0 S uwait 0xfffff8001b9c5b00 syz-executor.2 3807 1 808 0 S uwait 0xfffff8006d972300 syz-executor.2 3806 1 785 0 S uwait 0xfffff8005d307700 syz-executor.1 3805 1 813 0 S uwait 0xfffff8005d307500 syz-executor.3 3804 1 784 0 S uwait 0xfffff8005d307300 syz-executor.0 3801 1 813 0 S uwait 0xfffff8005d335700 syz-executor.3 3800 1 785 0 S uwait 0xfffff8001b9c5d00 syz-executor.1 3795 1 813 0 S uwait 0xfffff8005d307f00 syz-executor.3 3793 1 785 0 S uwait 0xfffff8006d972b00 syz-executor.1 3791 1 784 0 S uwait 0xfffff8006d972100 syz-executor.0 3790 1 785 0 S uwait 0xfffff8005d33a300 syz-executor.1 3788 1 813 0 S uwait 0xfffff80076f5c100 syz-executor.3 3785 1 808 0 S uwait 0xfffff8007620d300 syz-executor.2 3784 1 813 0 S uwait 0xfffff8005d307d00 syz-executor.3 3781 1 785 0 S uwait 0xfffff8006d972f00 syz-executor.1 3780 1 813 0 S uwait 0xfffff8006d972d00 syz-executor.3 3776 1 808 0 S uwait 0xfffff8005d335b00 syz-executor.2 3775 1 785 0 S uwait 0xfffff8005d337300 syz-executor.1 3773 1 813 0 S uwait 0xfffff8005d337b00 syz-executor.3 3772 1 785 0 S uwait 0xfffff8005d33ad00 syz-executor.1 3770 1 785 0 S uwait 0xfffff8005d33a700 syz-executor.1 3766 1 785 0 S uwait 0xfffff8005d33ab00 syz-executor.1 3765 1 813 0 S uwait 0xfffff8006d972500 syz-executor.3 3761 1 813 0 S uwait 0xfffff80076f5c300 syz-executor.3 3759 1 785 0 S uwait 0xfffff80076f5c500 syz-executor.1 3758 1 813 0 S uwait 0xfffff80076f5cf00 syz-executor.3 3754 1 813 0 S uwait 0xfffff8005d33a500 syz-executor.3 3752 1 785 0 S uwait 0xfffff80076f5cd00 syz-executor.1 3751 1 808 0 S uwait 0xfffff8005d335900 syz-executor.2 3750 1 813 0 S uwait 0xfffff8005d33a100 syz-executor.3 3746 1 785 0 S uwait 0xfffff80076f5cb00 syz-executor.1 3745 1 813 0 S uwait 0xfffff8006cb66300 syz-executor.3 3740 1 813 0 S uwait 0xfffff8006cd7a500 syz-executor.3 3739 1 808 0 S uwait 0xfffff8005d337f00 syz-executor.2 3738 1 785 0 S uwait 0xfffff8006cd3b100 syz-executor.1 3735 1 813 0 S uwait 0xfffff8005d33a900 syz-executor.3 3733 1 785 0 S uwait 0xfffff8005d335d00 syz-executor.1 3732 1 808 0 S uwait 0xfffff8005d33af00 syz-executor.2 3728 1 785 0 S uwait 0xfffff8005d335100 syz-executor.1 3727 1 808 0 S uwait 0xfffff8006d365b00 syz-executor.2 3725 1 813 0 S uwait 0xfffff8005d335500 syz-executor.3 3723 1 785 0 S uwait 0xfffff8005d335300 syz-executor.1 3718 1 808 0 S uwait 0xfffff8007620db00 syz-executor.2 3717 1 785 0 S uwait 0xfffff8007620d100 syz-executor.1 3713 1 813 0 S uwait 0xfffff8005d335f00 syz-executor.3 3711 1 785 0 S uwait 0xfffff8005d337d00 syz-executor.1 3709 1 785 0 S uwait 0xfffff8005d337900 syz-executor.1 3708 1 808 0 S uwait 0xfffff8005d337700 syz-executor.2 3707 1 813 0 S uwait 0xfffff8001ccd6d00 syz-executor.3 3703 1 813 0 S uwait 0xfffff8001ccd6700 syz-executor.3 3702 1 785 0 S uwait 0xfffff8001ccd4d00 syz-executor.1 3699 1 785 0 S uwait 0xfffff8005d337100 syz-executor.1 3698 1 813 0 S uwait 0xfffff8001ccd6b00 syz-executor.3 3695 1 785 0 S uwait 0xfffff8001ccd6f00 syz-executor.1 3694 1 808 0 S uwait 0xfffff8001ccd6100 syz-