panic: tcp_output Stopped at db_enter+0x18: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND *111468 37014 32767 0x10 0x4000000 1 syz-executor.1 16787 17339 32767 0x10 0 0 syz-executor.4 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(ffff800000bcf500) at tcp_output+0x2cd2 sys/netinet/tcp_output.c:727 tcp_send(fffffd80679df008,fffffd8068c63800,0,fffffd805e67a900) at tcp_send+0xc4 sys/netinet/tcp_usrreq.c:953 sosend(fffffd80679df008,0,ffff8000296172b0,0,fffffd805e67a900,0) at sosend+0x62a pru_send sys/sys/protosw.h:331 [inline] sosend(fffffd80679df008,0,ffff8000296172b0,0,fffffd805e67a900,0) at sosend+0x62a sys/kern/uipc_socket.c:646 sendit(ffff80002b068d20,3,ffff800029617430,0,ffff800029617520) at sendit+0x65d sys/kern/uipc_syscalls.c:694 sys_sendmsg(ffff80002b068d20,ffff8000296174d8,ffff800029617520) at sys_sendmsg+0x198 sys/kern/uipc_syscalls.c:601 syscall(ffff8000296175a0) at syscall+0x4c3 mi_syscall sys/sys/syscall_mi.h:101 [inline] syscall(ffff8000296175a0) at syscall+0x4c3 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x4007c224ec0, 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(ffff800000bcf500) at tcp_output+0x2cd2 sys/netinet/tcp_output.c:727 tcp_send(fffffd80679df008,fffffd8068c63800,0,fffffd805e67a900) at tcp_send+0xc4 sys/netinet/tcp_usrreq.c:953 sosend(fffffd80679df008,0,ffff8000296172b0,0,fffffd805e67a900,0) at sosend+0x62a pru_send sys/sys/protosw.h:331 [inline] sosend(fffffd80679df008,0,ffff8000296172b0,0,fffffd805e67a900,0) at sosend+0x62a sys/kern/uipc_socket.c:646 sendit(ffff80002b068d20,3,ffff800029617430,0,ffff800029617520) at sendit+0x65d sys/kern/uipc_syscalls.c:694 sys_sendmsg(ffff80002b068d20,ffff8000296174d8,ffff800029617520) at sys_sendmsg+0x198 sys/kern/uipc_syscalls.c:601 syscall(ffff8000296175a0) at syscall+0x4c3 mi_syscall sys/sys/syscall_mi.h:101 [inline] syscall(ffff8000296175a0) at syscall+0x4c3 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x4007c224ec0, count: -9 ddb{1}> show registers rdi 0 rsi 0x1 rbp 0xffff800029616f10 rbx 0xffff800020dd9b8f rdx 0 rcx 0 rax 0xffff80002b068d20 r8 0x101010101010101 r9 0x8080808080808080 r10 0xf2239b36c4d06d1f r11 0x556d54206ec580d1 r12 0xffff800020dd9990 r13 0 r14 0 r15 0x1 rip 0xffffffff823fc058 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff800029616f00 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{1}> show proc PROC (syz-executor.1) pid=111468 stat=onproc flags process=10 proc=4000000 pri=32, usrpri=81, nice=20 forw=0xffffffffffffffff, list=0xffff8000ffff6548,0xffff80002b068550 process=0xffff800021276578 user=0xffff800029612000, vmspace=0xfffffd8067c1e018 estcpu=36, cpticks=1, pctcpu=0.0 user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 20815 56165 37525 32767 3 0x90 nanoslp syz-executor.6 20815 270456 37525 32767 3 0x4000090 fsleep syz-executor.6 37014 198270 66063 32767 2 0x10 syz-executor.1 *37014 111468 66063 32767 7 0x4000010 syz-executor.1 37014 315483 66063 32767 3 0x4000090 fsleep syz-executor.1 37014 17094 66063 32767 3 0x4000090 fsleep syz-executor.1 82381 200424 17728 32767 3 0x90 nanoslp syz-executor.0 82381 240782 17728 32767 3 0x4000010 biowait syz-executor.0 82381 89233 17728 32767 3 0x4000010 inode syz-executor.0 82381 428411 17728 32767 3 0x4000090 fsleep syz-executor.0 7658 104927 40402 32767 3 0x90 nanoslp syz-executor.5 7658 46320 40402 32767 3 0x4000090 fsleep syz-executor.5 40402 161330 58424 32767 3 0x90 nanoslp syz-executor.5 58424 324131 73364 0 3 0x82 wait syz-executor.5 66063 171770 33948 32767 3 0x90 nanoslp syz-executor.1 33948 410858 73364 0 3 0x82 wait syz-executor.1 2477 124738 39144 32767 3 0x90 piperd syz-executor.7 39144 168602 73364 0 3 0x82 wait syz-executor.7 27390 14901 74249 32767 3 0x90 piperd syz-executor.3 74249 156349 73364 0 3 0x82 wait syz-executor.3 53194 62785 0 0 3 0x14200 bored sosplice 37525 352152 81337 32767 3 0x90 nanoslp syz-executor.6 81337 366849 73364 0 3 0x82 wait syz-executor.6 65081 326878 25527 32767 3 0x90 piperd syz-executor.2 17339 16787 97433 32767 7 0x10 syz-executor.4 97433 302657 73364 0 3 0x82 wait syz-executor.4 17728 312225 14226 32767 3 0x90 nanoslp syz-executor.0 25527 151773 73364 0 3 0x82 wait syz-executor.2 14226 289106 73364 0 3 0x82 wait syz-executor.0 73364 444367 52042 0 3 0x82 thrsleep syz-fuzzer 73364 116368 52042 0 3 0x4000082 nanoslp syz-fuzzer 73364 191461 52042 0 3 0x4000082 wait syz-fuzzer 73364 359734 52042 0 3 0x4000082 kqread syz-fuzzer 73364 331945 52042 0 3 0x4000082 wait syz-fuzzer 73364 53899 52042 0 3 0x4000082 wait syz-fuzzer 73364 304126 52042 0 3 0x4000082 thrsleep syz-fuzzer 73364 57756 52042 0 3 0x4000082 wait syz-fuzzer 73364 425840 52042 0 3 0x4000082 thrsleep syz-fuzzer 73364 104365 52042 0 3 0x4000082 thrsleep syz-fuzzer 73364 328984 52042 0 3 0x4000082 wait syz-fuzzer 73364 156978 52042 0 3 0x4000082 wait syz-fuzzer 73364 210165 52042 0 3 0x4000082 thrsleep syz-fuzzer 73364 188325 52042 0 3 0x4000082 wait syz-fuzzer 73364 148424 52042 0 3 0x4000082 wait syz-fuzzer 73364 349761 52042 0 3 0x4000082 thrsleep syz-fuzzer 52042 338267 7864 0 3 0x10008a sigsusp ksh 7864 125630 73926 0 3 0x9a kqread sshd 39010 67773 1 0 3 0x100083 ttyin getty 73926 131495 1 0 3 0x88 kqread sshd 93251 350537 45113 73 3 0x1100090 kqread syslogd 45113 109375 1 0 3 0x100082 netio syslogd 16818 18308 1 0 3 0x100080 kqread resolvd 91235 177422 63796 77 3 0x100092 kqread dhcpleased 10543 323429 63796 77 3 0x100092 kqread dhcpleased 63796 272400 1 0 3 0x80 kqread dhcpleased 78100 77223 0 0 3 0x14200 bored smr 96546 218039 0 0 2 0x14200 zerothread 14147 365051 0 0 3 0x14200 aiodoned aiodoned 3115 459435 0 0 3 0x14200 syncer update 99610 482844 0 0 3 0x14200 cleaner cleaner 85380 493060 0 0 3 0x14200 reaper reaper 80340 253384 0 0 3 0x14200 pgdaemon pagedaemon 81231 521615 0 0 3 0x14200 bored viomb 14967 116499 0 0 3 0x40014200 acpi0 acpi0 94352 87235 0 0 3 0x40014200 idle1 46733 478525 0 0 3 0x14200 bored softnet 79579 141680 0 0 3 0x14200 bored softnet 85744 396368 0 0 3 0x14200 bored softnet 66381 404900 0 0 3 0x14200 bored softnet 93828 290209 0 0 3 0x14200 bored systqmp 90151 476097 0 0 3 0x14200 bored systq 24238 414162 0 0 3 0x40014200 bored softclock 62004 61945 0 0 3 0x40014200 idle0 1 394007 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 37014 (syz-executor.1) thread 0xffff80002b068d20 (111468) 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 82381 (syz-executor.0) thread 0xffff8000ffff7508 (240782) exclusive rrwlock inode r = 0 (0xfffffd8067795098) #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_makeinode+0xae sys/ufs/ufs/ufs_vnops.c:1818 #8 ufs_create+0x41 sys/ufs/ufs/ufs_vnops.c:151 #9 VOP_CREATE+0xbc sys/kern/vfs_vops.c:103 #10 vn_open+0x28f sys/kern/vfs_vnops.c:116 #11 doopenat+0x26a sys/kern/vfs_syscalls.c:1127 #12 syscall+0x435 mi_syscall sys/sys/syscall_mi.h:101 [inline] #12 syscall+0x435 sys/arch/amd64/amd64/trap.c:585 #13 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd8067795d58) #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 vn_open+0x188 sys/kern/vfs_vnops.c:107 #8 doopenat+0x26a sys/kern/vfs_syscalls.c:1127 #9 syscall+0x435 mi_syscall sys/sys/syscall_mi.h:101 [inline] #9 syscall+0x435 sys/arch/amd64/amd64/trap.c:585 #10 Xsyscall+0x128 Process 17339 (syz-executor.4) thread 0xffff8000212737a0 (16787) exclusive rrwlock inode r = 0 (0xfffffd8067795a28) #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 (0xfffffd80691dc2b8) #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 10211 6412K 6419K 78643K 11327 0 pcb 13 12K 14K 78643K 17 0 rtable 242 6K 7K 78643K 762 0 ifaddr 82 17K 17K 78643K 142 0 sysctl 2 0K 0K 78643K 2 0 counters 56 35K 35K 78643K 72 0 ioctlops 0 0K 2K 78643K 137 0 iov 0 0K 28K 78643K 1696 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 4 0 vnodes 1271 79K 79K 78643K 2435 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 9K 78643K 66 0 VM map 2 1K 1K 78643K 2 0 sem 12 0K 0K 78643K 1369 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12548 0 file desc 22 81K 121K 78643K 6330 0 sigio 0 0K 0K 78643K 33 0 proc 56 78K 127K 78643K 1131 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 798 0 in_multi 99 6K 6K 78643K 266 0 ether_multi 1 0K 0K 78643K 25 0 mrt 2 0K 0K 78643K 2 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 247 1102K 1102K 78643K 247 0 exec 0 0K 2K 78643K 1682 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 275 85K 97K 78643K 39841 0 UVM aobj 131 4K 4K 78643K 136 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 141 0 NDP 11 0K 2K 78643K 51 0 temp 124 4726K 4790K 78643K 18321 0 kqueue 13 20K 28K 78643K 553 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 120 353 0 350 4 3 1 3 0 8 0 rtentry 112 209 0 95 4 0 4 4 0 8 0 unpcb 144 13746 0 13733 63 57 6 11 0 8 5 syncache 296 85 0 85 10 9 1 1 0 8 1 tcpqe 32 22 0 22 6 5 1 1 0 8 1 tcpcb 768 3444 0 3427 88 78 10 19 0 8 8 arp 120 37 0 18 1 0 1 1 0 8 0 ipq 40 7 0 6 4 3 1 1 0 8 0 ipqe 40 55 0 54 4 3 1 1 0 8 0 inpcb 368 6196 0 6181 99 91 8 17 0 8 5 nd6 48 55 0 28 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 256 831 0 364 32 2 30 30 0 8 0 art_table 32 832 0 364 4 0 4 4 0 8 0 art_node 16 208 0 104 1 0 1 1 0 8 0 sysvmsgpl 40 7 0 4 1 0 1 1 0 8 0 semapl 112 1367 0 1357 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 9942 0 8497 91 0 91 91 0 8 0 ffsino 272 9942 0 8497 97 0 97 97 0 8 0 nchpl 144 18628 0 16995 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 63173 0 63169 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 60404 0 60403 20 19 1 7 0 8 0 plimitpl 152 1197 0 1175 8 7 1 2 0 8 0 sigapl 424 6592 0 6541 7 0 7 7 0 8 0 futexpl 64 60175 0 60170 3 2 1 1 0 8 0 knotepl 120 674 0 0 17 0 17 17 0 8 0 kqueuepl 216 1861 0 1852 37 31 6 6 0 8 5 pipepl 320 1684 0 1656 43 37 6 8 0 8 3 fdescpl 496 6574 0 6541 7 2 5 6 0 8 0 filepl 152 52603 0 52361 92 76 16 24 0 8 6 lockfpl 104 1015 0 1013 1 0 1 1 0 8 0 lockfspl 48 362 0 360 1 0 1 1 0 8 0 sessionpl 144 31 0 15 1 0 1 1 0 8 0 pgrppl 48 49 0 33 1 0 1 1 0 8 0 ucredpl 104 7498 0 7480 1 0 1 1 0 8 0 zombiepl 144 6541 0 6541 1 0 1 1 0 8 1 processpl 1064 6592 0 6541 5 1 4 5 0 8 0 procpl 672 19251 0 19177 11 3 8 9 0 8 0 sosppl 168 113 0 112 7 6 1 1 0 8 0 sockpl 488 20464 0 20430 426 405 21 37 0 8 15 mcl64k 65536 18 0 0 3 0 3 3 0 8 0 mcl16k 16384 17 0 0 3 0 3 3 0 8 0 mcl12k 12288 25 0 0 2 0 2 2 0 8 0 mcl9k 9216 17 0 0 2 0 2 2 0 8 0 mcl8k 8192 17 0 0 3 0 3 3 0 8 0 mcl4k 4096 37 0 0 5 0 5 5 0 8 0 mcl2k2 2112 5 0 0 1 0 1 1 0 8 0 mcl2k 2048 292 0 0 33 7 26 33 0 8 0 mtagpl 96 4 0 0 1 0 1 1 0 8 0 mbufpl 256 685 0 0 35 0 35 35 0 8 0 bufpl 288 14008 0 7681 453 0 453 453 0 8 0 anonpl 24 1387737 0 1374519 204 100 104 110 0 186 8 amapchunkpl 152 117326 0 116696 61 32 29 37 0 158 0 amappl16 200 23006 0 22567 128 98 30 35 0 8 6 amappl15 192 712 0 706 1 0 1 1 0 8 0 amappl14 184 1682 0 1675 1 0 1 1 0 8 0 amappl13 176 356 0 354 1 0 1 1 0 8 0 amappl12 168 18 0 15 1 0 1 1 0 8 0 amappl11 160 1311 0 1292 1 0 1 1 0 8 0 amappl10 152 1699 0 1692 1 0 1 1 0 8 0 amappl9 144 1293 0 1287 1 0 1 1 0 8 0 amappl8 136 818 0 735 3 0 3 3 0 8 0 amappl7 128 200 0 178 1 0 1 1 0 8 0 amappl6 120 1080 0 1061 2 1 1 2 0 8 0 amappl5 112 6548 0 6526 1 0 1 1 0 8 0 amappl4 104 3521 0 3486 7 5 2 2 0 8 0 amappl3 96 20034 0 19975 2 0 2 2 0 8 0 amappl2 88 1029 0 991 2 0 2 2 0 8 0 amappl1 80 167189 0 166487 23 6 17 19 0 8 1 amappl 88 38950 0 38775 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 6575 0 6542 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 6575 0 6542 1 0 1 1 0 8 0 vmmpekpl 168 56384 0 56324 4 0 4 4 0 8 0 vmmpepl 168 657024 0 654359 216 79 137 140 0 357 8 vmsppl 368 6574 0 6542 4 0 4 4 0 8 0 rwobjpl 56 171166 0 163673 119 9 110 110 0 8 1 pdppl 4096 13157 0 13084 224 143 81 93 0 8 8 pvpl 32 2635549 0 2617152 374 188 186 257 0 265 15 pmappl 248 6574 0 6542 4 1 3 3 0 8 0 extentpl 40 56 0 38 1 0 1 1 0 8 0 phpool 112 1091 0 246 25 0 25 25 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 __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x40 sys/dev/kcov.c:154 __mp_acquire_count(ffffffff82a07a40,1) at __mp_acquire_count+0x48 sys/kern/kern_lock.c:227 mi_switch() at mi_switch+0x3bb sys/kern/sched_bsd.c:415 sleep_finish(ffff800024793c60,1) at sleep_finish+0x180 sys/kern/kern_synch.c:417 tsleep(fffffd806c8d0820,11,ffffffff8261f7d5,0) at tsleep+0x12c sys/kern/kern_synch.c:155 biowait(fffffd806c8d0820) at biowait+0x91 sys/kern/vfs_bio.c:1268 bwrite(fffffd806c8d0820) at bwrite+0x21b sys/kern/vfs_bio.c:769 VOP_BWRITE(fffffd806c8d0820) at VOP_BWRITE+0x4a sys/kern/vfs_vops.c:640 ufs_mkdir(ffff800024793f60) at ufs_mkdir+0x6b4 sys/ufs/ufs/ufs_vnops.c:1236 VOP_MKDIR(fffffd806918bd98,ffff8000247940c0,ffff8000247940f0,ffff800024793ff0) at VOP_MKDIR+0xbf sys/kern/vfs_vops.c:388 domkdirat(ffff8000212737a0,ffffff9c,7f7ffffdcb50,1ff) at domkdirat+0x121 sys/kern/vfs_syscalls.c:3112 end trace frame: 0xffff800024794260, count: 0 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 __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x40 sys/dev/kcov.c:154 __mp_acquire_count(ffffffff82a07a40,1) at __mp_acquire_count+0x48 sys/kern/kern_lock.c:227 mi_switch() at mi_switch+0x3bb sys/kern/sched_bsd.c:415 sleep_finish(ffff800024793c60,1) at sleep_finish+0x180 sys/kern/kern_synch.c:417 tsleep(fffffd806c8d0820,11,ffffffff8261f7d5,0) at tsleep+0x12c sys/kern/kern_synch.c:155 biowait(fffffd806c8d0820) at biowait+0x91 sys/kern/vfs_bio.c:1268 bwrite(fffffd806c8d0820) at bwrite+0x21b sys/kern/vfs_bio.c:769 VOP_BWRITE(fffffd806c8d0820) at VOP_BWRITE+0x4a sys/kern/vfs_vops.c:640 ufs_mkdir(ffff800024793f60) at ufs_mkdir+0x6b4 sys/ufs/ufs/ufs_vnops.c:1236 VOP_MKDIR(fffffd806918bd98,ffff8000247940c0,ffff8000247940f0,ffff800024793ff0) at VOP_MKDIR+0xbf sys/kern/vfs_vops.c:388 domkdirat(ffff8000212737a0,ffffff9c,7f7ffffdcb50,1ff) at domkdirat+0x121 sys/kern/vfs_syscalls.c:3112 syscall(ffff800024794270) at syscall+0x435 mi_syscall sys/sys/syscall_mi.h:101 [inline] syscall(ffff800024794270) at syscall+0x435 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffdcbc0, count: -16 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(ffff800000bcf500) at tcp_output+0x2cd2 sys/netinet/tcp_output.c:727 tcp_send(fffffd80679df008,fffffd8068c63800,0,fffffd805e67a900) at tcp_send+0xc4 sys/netinet/tcp_usrreq.c:953 sosend(fffffd80679df008,0,ffff8000296172b0,0,fffffd805e67a900,0) at sosend+0x62a pru_send sys/sys/protosw.h:331 [inline] sosend(fffffd80679df008,0,ffff8000296172b0,0,fffffd805e67a900,0) at sosend+0x62a sys/kern/uipc_socket.c:646 sendit(ffff80002b068d20,3,ffff800029617430,0,ffff800029617520) at sendit+0x65d sys/kern/uipc_syscalls.c:694 sys_sendmsg(ffff80002b068d20,ffff8000296174d8,ffff800029617520) at sys_sendmsg+0x198 sys/kern/uipc_syscalls.c:601 syscall(ffff8000296175a0) at syscall+0x4c3 mi_syscall sys/sys/syscall_mi.h:101 [inline] syscall(ffff8000296175a0) at syscall+0x4c3 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x4007c224ec0, 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(ffff800000bcf500) at tcp_output+0x2cd2 sys/netinet/tcp_output.c:727 tcp_send(fffffd80679df008,fffffd8068c63800,0,fffffd805e67a900) at tcp_send+0xc4 sys/netinet/tcp_usrreq.c:953 sosend(fffffd80679df008,0,ffff8000296172b0,0,fffffd805e67a900,0) at sosend+0x62a pru_send sys/sys/protosw.h:331 [inline] sosend(fffffd80679df008,0,ffff8000296172b0,0,fffffd805e67a900,0) at sosend+0x62a sys/kern/uipc_socket.c:646 sendit(ffff80002b068d20,3,ffff800029617430,0,ffff800029617520) at sendit+0x65d sys/kern/uipc_syscalls.c:694 sys_sendmsg(ffff80002b068d20,ffff8000296174d8,ffff800029617520) at sys_sendmsg+0x198 sys/kern/uipc_syscalls.c:601 syscall(ffff8000296175a0) at syscall+0x4c3 mi_syscall sys/sys/syscall_mi.h:101 [inline] syscall(ffff8000296175a0) at syscall+0x4c3 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x4007c224ec0, count: -9