panic: tcp_output Stopped at db_enter+0x18: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND *269901 75769 32767 0x10 0x4000000 1 syz-executor.0 186345 95542 32767 0x10 0x4000000 0 syz-executor.5 db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff8257befc) at panic+0x177 sys/kern/subr_prf.c:198 tcp_output(ffff800000c8e938) at tcp_output+0x2cd2 sys/netinet/tcp_output.c:727 tcp_send(fffffd80654a65d8,fffffd807f00b500,0,fffffd806c633400) at tcp_send+0xc4 sys/netinet/tcp_usrreq.c:953 sosend(fffffd80654a65d8,0,ffff8000247d7db0,0,fffffd806c633400,0) at sosend+0x62a pru_send sys/sys/protosw.h:331 [inline] sosend(fffffd80654a65d8,0,ffff8000247d7db0,0,fffffd806c633400,0) at sosend+0x62a sys/kern/uipc_socket.c:646 sendit(ffff80002bc88d20,3,ffff8000247d7f30,0,ffff8000247d8020) at sendit+0x65d sys/kern/uipc_syscalls.c:694 sys_sendmsg(ffff80002bc88d20,ffff8000247d7fd8,ffff8000247d8020) at sys_sendmsg+0x198 sys/kern/uipc_syscalls.c:601 syscall(ffff8000247d80a0) at syscall+0x4c3 mi_syscall sys/sys/syscall_mi.h:101 [inline] syscall(ffff8000247d80a0) at syscall+0x4c3 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xa8918f9be10, count: 6 https://www.openbsd.org/ddb.html describes the minimum info required in bug reports. Insufficient info makes it difficult to find and fix bugs. ddb{1}> ddb{1}> set $lines = 0 ddb{1}> set $maxwidth = 0 ddb{1}> show panic *cpu1: tcp_output ddb{1}> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff8257befc) at panic+0x177 sys/kern/subr_prf.c:198 tcp_output(ffff800000c8e938) at tcp_output+0x2cd2 sys/netinet/tcp_output.c:727 tcp_send(fffffd80654a65d8,fffffd807f00b500,0,fffffd806c633400) at tcp_send+0xc4 sys/netinet/tcp_usrreq.c:953 sosend(fffffd80654a65d8,0,ffff8000247d7db0,0,fffffd806c633400,0) at sosend+0x62a pru_send sys/sys/protosw.h:331 [inline] sosend(fffffd80654a65d8,0,ffff8000247d7db0,0,fffffd806c633400,0) at sosend+0x62a sys/kern/uipc_socket.c:646 sendit(ffff80002bc88d20,3,ffff8000247d7f30,0,ffff8000247d8020) at sendit+0x65d sys/kern/uipc_syscalls.c:694 sys_sendmsg(ffff80002bc88d20,ffff8000247d7fd8,ffff8000247d8020) at sys_sendmsg+0x198 sys/kern/uipc_syscalls.c:601 syscall(ffff8000247d80a0) at syscall+0x4c3 mi_syscall sys/sys/syscall_mi.h:101 [inline] syscall(ffff8000247d80a0) at syscall+0x4c3 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xa8918f9be10, count: -9 ddb{1}> show registers rdi 0 rsi 0x1 rbp 0xffff8000247d7a10 rbx 0xffff800020dd9b8f rdx 0 rcx 0 rax 0xffff80002bc88d20 r8 0x101010101010101 r9 0x8080808080808080 r10 0x1be707c2cc21b6f6 r11 0x1ba0d1c289d5de78 r12 0xffff800020dd9990 r13 0 r14 0 r15 0x1 rip 0xffffffff823fc058 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff8000247d7a00 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{1}> show proc PROC (syz-executor.0) pid=269901 stat=onproc flags process=10 proc=4000000 pri=32, usrpri=86, nice=20 forw=0xffffffffffffffff, list=0xffff80002bc88540,0xffff80002bc89510 process=0xffff80002129a578 user=0xffff8000247d3000, vmspace=0xfffffd8070831e70 estcpu=36, cpticks=1, pctcpu=0.0 user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 46833 210815 55458 32767 2 0x10 syz-executor.6 46833 167659 55458 32767 3 0x4000090 netcon syz-executor.6 46833 411546 55458 32767 3 0x4000090 fsleep syz-executor.6 75769 27313 2840 32767 3 0x90 nanoslp syz-executor.0 75769 369986 2840 32767 2 0x4000010 syz-executor.0 *75769 269901 2840 32767 7 0x4000010 syz-executor.0 75769 359436 2840 32767 2 0x4000010 syz-executor.0 75769 335059 2840 32767 2 0x4000010 syz-executor.0 75769 121649 2840 32767 2 0x4000010 syz-executor.0 42401 97178 79404 32767 2 0x10 syz-executor.7 42401 516180 79404 32767 3 0x4000090 fsleep syz-executor.7 95542 477792 60069 32767 2 0x10 syz-executor.5 95542 186345 60069 32767 7 0x4000010 syz-executor.5 55458 324382 68966 32767 3 0x90 nanoslp syz-executor.6 68966 16866 76112 0 3 0x82 wait syz-executor.6 79404 166151 24270 32767 3 0x90 nanoslp syz-executor.7 24270 310988 76112 0 3 0x82 wait syz-executor.7 35453 246078 9553 32767 3 0x90 nanoslp syz-executor.2 9553 198159 76112 0 3 0x82 wait syz-executor.2 8237 28669 0 0 3 0x14200 bored sosplice 24982 94413 30296 32767 3 0x10 biowait syz-executor.1 30296 400775 76112 0 3 0x82 wait syz-executor.1 84712 464723 61903 32767 3 0x10 biowait syz-executor.4 60069 464315 25179 32767 3 0x90 nanoslp syz-executor.5 61903 349068 76112 0 3 0x82 wait syz-executor.4 38831 256771 92878 32767 3 0x90 piperd syz-executor.3 25179 477338 76112 0 3 0x82 wait syz-executor.5 2840 328896 94334 32767 3 0x90 nanoslp syz-executor.0 92878 162732 76112 0 3 0x82 wait syz-executor.3 94334 144873 76112 0 3 0x82 wait syz-executor.0 76112 206639 48769 0 3 0x82 thrsleep syz-fuzzer 76112 92477 48769 0 3 0x4000082 nanoslp syz-fuzzer 76112 493097 48769 0 3 0x4000082 wait syz-fuzzer 76112 518300 48769 0 3 0x4000082 thrsleep syz-fuzzer 76112 52270 48769 0 3 0x4000082 wait syz-fuzzer 76112 143336 48769 0 3 0x4000082 thrsleep syz-fuzzer 76112 5825 48769 0 3 0x4000082 wait syz-fuzzer 76112 121095 48769 0 3 0x4000082 wait syz-fuzzer 76112 397803 48769 0 3 0x4000082 thrsleep syz-fuzzer 76112 132252 48769 0 3 0x4000082 thrsleep syz-fuzzer 76112 44074 48769 0 3 0x4000082 wait syz-fuzzer 76112 98009 48769 0 3 0x4000082 kqread syz-fuzzer 76112 87579 48769 0 3 0x4000082 wait syz-fuzzer 76112 520357 48769 0 3 0x4000082 wait syz-fuzzer 76112 152606 48769 0 3 0x4000082 wait syz-fuzzer 76112 137264 48769 0 3 0x4000082 thrsleep syz-fuzzer 48769 200147 30284 0 3 0x10008a sigsusp ksh 30284 181022 21264 0 3 0x9a kqread sshd 77071 187285 1 0 3 0x100083 ttyin getty 21264 138397 1 0 3 0x88 kqread sshd 25456 123715 47694 73 3 0x1100090 kqread syslogd 47694 359748 1 0 3 0x100082 netio syslogd 48586 471697 1 0 3 0x100080 kqread resolvd 30388 23417 78349 77 3 0x100092 kqread dhcpleased 84008 157198 78349 77 3 0x100092 kqread dhcpleased 78349 503519 1 0 3 0x80 kqread dhcpleased 47230 100618 0 0 3 0x14200 bored smr 14986 31845 0 0 2 0x14200 zerothread 36089 328441 0 0 3 0x14200 aiodoned aiodoned 46511 110321 0 0 3 0x14200 syncer update 77208 398536 0 0 3 0x14200 cleaner cleaner 87671 349302 0 0 3 0x14200 reaper reaper 70646 446551 0 0 3 0x14200 pgdaemon pagedaemon 37114 136225 0 0 3 0x14200 bored viomb 44986 390231 0 0 3 0x40014200 acpi0 acpi0 4581 302273 0 0 3 0x40014200 idle1 42236 356569 0 0 3 0x14200 bored softnet 78515 252883 0 0 3 0x14200 bored softnet 50089 26521 0 0 3 0x14200 bored softnet 6140 193269 0 0 3 0x14200 bored softnet 32597 319431 0 0 3 0x14200 bored systqmp 20257 156057 0 0 3 0x14200 bored systq 21348 458340 0 0 3 0x40014200 bored softclock 17805 246643 0 0 3 0x40014200 idle0 1 130027 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 75769 (syz-executor.0) thread 0xffff80002bc88d20 (269901) exclusive rwlock netlock r = 0 (0xffffffff8292fbb0) #0 witness_lock+0x44d #1 sosend+0x500 sys/kern/uipc_socket.c:632 #2 sendit+0x65d sys/kern/uipc_syscalls.c:694 #3 sys_sendmsg+0x198 sys/kern/uipc_syscalls.c:601 #4 syscall+0x4c3 mi_syscall sys/sys/syscall_mi.h:101 [inline] #4 syscall+0x4c3 sys/arch/amd64/amd64/trap.c:585 #5 Xsyscall+0x128 Process 24982 (syz-executor.1) thread 0xffff80002721c2b0 (94413) exclusive rrwlock inode r = 0 (0xfffffd8066df5d58) #0 witness_lock+0x44d #1 rw_enter+0x3e1 sys/kern/kern_rwlock.c:310 #2 rrw_enter+0x8b sys/kern/kern_rwlock.c:465 #3 VOP_LOCK+0x87 sys/kern/vfs_vops.c:518 #4 ufs_ihashins+0x42 sys/ufs/ufs/ufs_ihash.c:140 #5 ffs_vget+0x141 sys/ufs/ffs/ffs_vfsops.c:1353 #6 ffs_inode_alloc+0x1be sys/ufs/ffs/ffs_alloc.c:394 #7 ufs_mkdir+0xf4 sys/ufs/ufs/ufs_vnops.c:1150 #8 VOP_MKDIR+0xbf sys/kern/vfs_vops.c:388 #9 domkdirat+0x121 sys/kern/vfs_syscalls.c:3112 #10 syscall+0x435 mi_syscall sys/sys/syscall_mi.h:101 [inline] #10 syscall+0x435 sys/arch/amd64/amd64/trap.c:585 #11 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd806c6e9928) #0 witness_lock+0x44d #1 rw_enter+0x3e1 sys/kern/kern_rwlock.c:310 #2 rrw_enter+0x8b sys/kern/kern_rwlock.c:465 #3 VOP_LOCK+0x87 sys/kern/vfs_vops.c:518 #4 vn_lock+0x84 sys/kern/vfs_vnops.c:564 #5 vfs_lookup+0xd1 sys/kern/vfs_lookup.c:412 #6 namei+0x36a sys/kern/vfs_lookup.c:244 #7 domkdirat+0x75 sys/kern/vfs_syscalls.c:3097 #8 syscall+0x435 mi_syscall sys/sys/syscall_mi.h:101 [inline] #8 syscall+0x435 sys/arch/amd64/amd64/trap.c:585 #9 Xsyscall+0x128 Process 84712 (syz-executor.4) thread 0xffff80002721c010 (464723) exclusive rrwlock inode r = 0 (0xfffffd8066df53c8) #0 witness_lock+0x44d #1 rw_enter+0x3e1 sys/kern/kern_rwlock.c:310 #2 rrw_enter+0x8b sys/kern/kern_rwlock.c:465 #3 VOP_LOCK+0x87 sys/kern/vfs_vops.c:518 #4 ufs_ihashins+0x42 sys/ufs/ufs/ufs_ihash.c:140 #5 ffs_vget+0x141 sys/ufs/ffs/ffs_vfsops.c:1353 #6 ffs_inode_alloc+0x1be sys/ufs/ffs/ffs_alloc.c:394 #7 ufs_mkdir+0xf4 sys/ufs/ufs/ufs_vnops.c:1150 #8 VOP_MKDIR+0xbf sys/kern/vfs_vops.c:388 #9 domkdirat+0x121 sys/kern/vfs_syscalls.c:3112 #10 syscall+0x435 mi_syscall sys/sys/syscall_mi.h:101 [inline] #10 syscall+0x435 sys/arch/amd64/amd64/trap.c:585 #11 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd80671ff920) #0 witness_lock+0x44d #1 rw_enter+0x3e1 sys/kern/kern_rwlock.c:310 #2 rrw_enter+0x8b sys/kern/kern_rwlock.c:465 #3 VOP_LOCK+0x87 sys/kern/vfs_vops.c:518 #4 vn_lock+0x84 sys/kern/vfs_vnops.c:564 #5 vfs_lookup+0xd1 sys/kern/vfs_lookup.c:412 #6 namei+0x36a sys/kern/vfs_lookup.c:244 #7 domkdirat+0x75 sys/kern/vfs_syscalls.c:3097 #8 syscall+0x435 mi_syscall sys/sys/syscall_mi.h:101 [inline] #8 syscall+0x435 sys/arch/amd64/amd64/trap.c:585 #9 Xsyscall+0x128 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10198 6410K 6419K 78643K 11313 0 pcb 13 10K 12K 78643K 15 0 rtable 238 6K 7K 78643K 3024 0 ifaddr 82 17K 17K 78643K 142 0 sysctl 3 1K 1K 78643K 3 0 counters 56 35K 35K 78643K 72 0 ioctlops 0 0K 2K 78643K 134 0 iov 0 0K 32K 78643K 767 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 4 0 vnodes 1271 79K 79K 78643K 2255 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 17K 78643K 335 0 VM map 2 1K 1K 78643K 2 0 sem 12 0K 0K 78643K 1121 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12548 0 file desc 22 81K 113K 78643K 5021 0 sigio 0 0K 0K 78643K 360 0 proc 56 78K 103K 78643K 1092 0 subproc 104 6K 6K 78643K 208 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 2007 0 in_multi 99 6K 6K 78643K 240 0 ether_multi 1 0K 0K 78643K 13 0 mrt 1 0K 0K 78643K 1 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 169 758K 758K 78643K 169 0 exec 0 0K 2K 78643K 1566 0 tdb 3 0K 0K 78643K 3 0 pagedep 1 8K 8K 78643K 1 0 inodedep 1 32K 32K 78643K 1 0 newblk 1 0K 0K 78643K 1 0 VM swap 8 62K 62K 78643K 8 0 UVM amap 318 91K 98K 78643K 31816 0 UVM aobj 131 8K 8K 78643K 136 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 153 0 NDP 11 0K 2K 78643K 51 0 temp 124 4726K 4854K 78643K 15348 0 kqueue 13 20K 30K 78643K 725 0 SYN cache 2 16K 16K 78643K 2 0 ddb{1}> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle plcache 128 22 0 0 1 0 1 1 0 8 0 rtpcb 120 2945 0 2942 23 20 3 6 0 8 2 rtentry 112 204 0 92 4 0 4 4 0 8 0 unpcb 144 4106 0 4092 40 38 2 7 0 8 1 syncache 296 43 0 43 8 8 0 1 0 8 0 tcpqe 32 6 0 6 3 3 0 1 0 8 0 tcpcb 768 2037 0 2025 59 54 5 15 0 8 3 arp 120 35 0 16 1 0 1 1 0 8 0 ipq 40 9 0 8 2 1 1 1 0 8 0 ipqe 40 30 0 29 2 1 1 1 0 8 0 inpcb 368 5713 0 5700 55 48 7 14 0 8 5 nd6 48 52 0 27 1 0 1 1 0 8 0 kcovpl 48 16 0 8 1 0 1 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 853 0 394 32 3 29 30 0 8 0 art_table 32 854 0 394 4 0 4 4 0 8 0 art_node 16 203 0 101 1 0 1 1 0 8 0 sysvmsgpl 40 2 0 2 1 1 0 1 0 8 0 semapl 112 1119 0 1109 1 0 1 1 0 8 0 shmpl 112 133 0 5 4 0 4 4 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 8231 0 6796 91 0 91 91 0 8 0 ffsino 272 8231 0 6796 97 0 97 97 0 8 0 nchpl 144 15327 0 13695 63 0 63 63 0 8 0 uvmvnodes 80 5926 0 0 121 0 121 121 0 8 0 vnodes 216 5926 0 0 330 0 330 330 0 8 0 namei 1024 51396 0 51394 2 1 1 2 0 8 0 percpumem 16 48 0 8 1 0 1 1 0 8 0 kstatmem 264 38 0 16 2 0 2 2 0 8 0 scxspl 216 45267 0 45265 17 16 1 8 0 8 0 plimitpl 152 1184 0 1162 1 0 1 1 0 8 0 sigapl 424 5293 0 5241 7 0 7 7 0 8 0 futexpl 64 47135 0 47133 2 1 1 1 0 8 0 knotepl 120 725 0 0 17 0 17 17 0 8 0 kqueuepl 216 2635 0 2562 42 37 5 5 0 8 0 pipepl 320 1049 0 1021 22 16 6 8 0 8 3 fdescpl 496 5275 0 5242 6 1 5 6 0 8 0 filepl 152 38998 0 38694 55 40 15 20 0 8 3 lockfpl 104 873 0 871 2 1 1 2 0 8 0 lockfspl 48 178 0 176 1 0 1 1 0 8 0 sessionpl 144 31 0 15 1 0 1 1 0 8 0 pgrppl 48 50 0 34 1 0 1 1 0 8 0 ucredpl 104 6187 0 6169 1 0 1 1 0 8 0 zombiepl 144 5242 0 5241 1 0 1 1 0 8 0 processpl 1064 5293 0 5241 4 0 4 4 0 8 0 procpl 672 15115 0 15039 13 5 8 8 0 8 0 sosppl 168 99 0 99 8 7 1 1 0 8 1 sockpl 488 12875 0 12848 243 232 11 36 0 8 7 mcl64k 65536 24 0 0 3 0 3 3 0 8 0 mcl16k 16384 17 0 0 3 0 3 3 0 8 0 mcl12k 12288 17 0 0 2 0 2 2 0 8 0 mcl9k 9216 8 0 0 1 0 1 1 0 8 0 mcl8k 8192 25 0 0 4 1 3 3 0 8 0 mcl4k 4096 33 0 0 4 0 4 4 0 8 0 mcl2k2 2112 5 0 0 1 0 1 1 0 8 0 mcl2k 2048 198 0 0 21 1 20 21 0 8 0 mtagpl 96 5 0 0 1 0 1 1 0 8 0 mbufpl 256 564 0 0 27 0 27 27 0 8 0 bufpl 288 10766 0 4436 453 0 453 453 0 8 0 anonpl 24 1031565 0 1018292 155 63 92 110 0 186 0 amapchunkpl 152 90480 0 89806 42 7 35 39 0 158 0 amappl16 200 14360 0 13969 57 36 21 31 0 8 0 amappl15 192 1858 0 1845 1 0 1 1 0 8 0 amappl14 184 701 0 695 1 0 1 1 0 8 0 amappl13 176 1035 0 1032 1 0 1 1 0 8 0 amappl12 168 95 0 92 1 0 1 1 0 8 0 amappl11 160 100 0 84 1 0 1 1 0 8 0 amappl10 152 26 0 24 1 0 1 1 0 8 0 amappl9 144 2295 0 2289 1 0 1 1 0 8 0 amappl8 136 1148 0 1048 4 0 4 4 0 8 0 amappl7 128 487 0 465 1 0 1 1 0 8 0 amappl6 120 2065 0 2044 2 1 1 2 0 8 0 amappl5 112 3753 0 3733 1 0 1 1 0 8 0 amappl4 104 1798 0 1768 2 0 2 2 0 8 0 amappl3 96 16274 0 16216 2 0 2 2 0 8 0 amappl2 88 1666 0 1630 2 1 1 2 0 8 0 amappl1 80 132466 0 131764 20 3 17 19 0 8 0 amappl 88 30989 0 30802 6 1 5 5 0 92 0 dma4096 4096 1 0 1 1 1 0 1 0 8 0 dma1024 1024 1 0 0 1 0 1 1 0 8 0 dma256 256 6 0 6 1 1 0 1 0 8 0 dma128 128 253 0 253 1 1 0 1 0 8 0 dma64 64 6 0 6 1 1 0 1 0 8 0 dma32 32 7 0 7 1 1 0 1 0 8 0 dma16 16 18 0 17 1 0 1 1 0 8 0 aobjpl 72 135 0 5 3 0 3 3 0 8 0 uaddrrnd 24 5276 0 5243 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 5276 0 5243 1 0 1 1 0 8 0 vmmpekpl 168 45831 0 45765 4 0 4 4 0 8 0 vmmpepl 168 520688 0 518047 188 56 132 149 0 357 5 vmsppl 368 5275 0 5243 4 0 4 4 0 8 0 rwobjpl 56 134975 0 127504 111 4 107 107 0 8 0 pdppl 4096 10559 0 10486 232 151 81 89 0 8 8 pvpl 32 2124803 0 2106444 349 154 195 242 0 265 36 pmappl 248 5275 0 5243 4 1 3 3 0 8 0 extentpl 40 56 0 38 1 0 1 1 0 8 0 phpool 112 1035 0 207 24 0 24 24 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp x86_ipi_db(ffffffff82933ff0) at x86_ipi_db+0x1a sys/arch/amd64/amd64/db_interface.c:393 x86_ipi_handler() at x86_ipi_handler+0xb7 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x23 __mp_lock(ffffffff82a07a40) at __mp_lock+0x129 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff82a07a40) at __mp_lock+0x129 sys/kern/kern_lock.c:147 intr_handler(ffff80002e4ab770,ffff80000004bd00) at intr_handler+0x5e sys/arch/amd64/amd64/intr.c:532 Xintr_ioapic_edge21_untramp() at Xintr_ioapic_edge21_untramp+0x18f __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x7 sys/dev/kcov.c:144 futex_wait(67191177d60,f,0,2) at futex_wait+0x13c sys/kern/sys_futex.c:259 sys_futex(ffff8000212967e8,ffff80002e4ab9c0,ffff80002e4aba10) at sys_futex+0xf8 sys/kern/sys_futex.c:110 syscall(ffff80002e4aba90) at syscall+0x4c3 mi_syscall sys/sys/syscall_mi.h:101 [inline] syscall(ffff80002e4aba90) at syscall+0x4c3 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x671ffb80a70, count: 4 ddb{0}> trace x86_ipi_db(ffffffff82933ff0) at x86_ipi_db+0x1a sys/arch/amd64/amd64/db_interface.c:393 x86_ipi_handler() at x86_ipi_handler+0xb7 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x23 __mp_lock(ffffffff82a07a40) at __mp_lock+0x129 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff82a07a40) at __mp_lock+0x129 sys/kern/kern_lock.c:147 intr_handler(ffff80002e4ab770,ffff80000004bd00) at intr_handler+0x5e sys/arch/amd64/amd64/intr.c:532 Xintr_ioapic_edge21_untramp() at Xintr_ioapic_edge21_untramp+0x18f __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x7 sys/dev/kcov.c:144 futex_wait(67191177d60,f,0,2) at futex_wait+0x13c sys/kern/sys_futex.c:259 sys_futex(ffff8000212967e8,ffff80002e4ab9c0,ffff80002e4aba10) at sys_futex+0xf8 sys/kern/sys_futex.c:110 syscall(ffff80002e4aba90) at syscall+0x4c3 mi_syscall sys/sys/syscall_mi.h:101 [inline] syscall(ffff80002e4aba90) at syscall+0x4c3 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x671ffb80a70, count: -11 ddb{0}> machine ddbcpu 1 Stopped at db_enter+0x18: addq $0x8,%rsp db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff8257befc) at panic+0x177 sys/kern/subr_prf.c:198 tcp_output(ffff800000c8e938) at tcp_output+0x2cd2 sys/netinet/tcp_output.c:727 tcp_send(fffffd80654a65d8,fffffd807f00b500,0,fffffd806c633400) at tcp_send+0xc4 sys/netinet/tcp_usrreq.c:953 sosend(fffffd80654a65d8,0,ffff8000247d7db0,0,fffffd806c633400,0) at sosend+0x62a pru_send sys/sys/protosw.h:331 [inline] sosend(fffffd80654a65d8,0,ffff8000247d7db0,0,fffffd806c633400,0) at sosend+0x62a sys/kern/uipc_socket.c:646 sendit(ffff80002bc88d20,3,ffff8000247d7f30,0,ffff8000247d8020) at sendit+0x65d sys/kern/uipc_syscalls.c:694 sys_sendmsg(ffff80002bc88d20,ffff8000247d7fd8,ffff8000247d8020) at sys_sendmsg+0x198 sys/kern/uipc_syscalls.c:601 syscall(ffff8000247d80a0) at syscall+0x4c3 mi_syscall sys/sys/syscall_mi.h:101 [inline] syscall(ffff8000247d80a0) at syscall+0x4c3 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xa8918f9be10, count: 6 ddb{1}> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff8257befc) at panic+0x177 sys/kern/subr_prf.c:198 tcp_output(ffff800000c8e938) at tcp_output+0x2cd2 sys/netinet/tcp_output.c:727 tcp_send(fffffd80654a65d8,fffffd807f00b500,0,fffffd806c633400) at tcp_send+0xc4 sys/netinet/tcp_usrreq.c:953 sosend(fffffd80654a65d8,0,ffff8000247d7db0,0,fffffd806c633400,0) at sosend+0x62a pru_send sys/sys/protosw.h:331 [inline] sosend(fffffd80654a65d8,0,ffff8000247d7db0,0,fffffd806c633400,0) at sosend+0x62a sys/kern/uipc_socket.c:646 sendit(ffff80002bc88d20,3,ffff8000247d7f30,0,ffff8000247d8020) at sendit+0x65d sys/kern/uipc_syscalls.c:694 sys_sendmsg(ffff80002bc88d20,ffff8000247d7fd8,ffff8000247d8020) at sys_sendmsg+0x198 sys/kern/uipc_syscalls.c:601 syscall(ffff8000247d80a0) at syscall+0x4c3 mi_syscall sys/sys/syscall_mi.h:101 [inline] syscall(ffff8000247d80a0) at syscall+0x4c3 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xa8918f9be10, count: -9