panic: tcp_output Stopped at db_enter+0x18: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND 72428 16230 32767 0x10 0x4000000 0 syz-executor.2 *328378 74286 32767 0x10 0x4000000 1 syz-executor.6 db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff8257e05d) at panic+0x177 sys/kern/subr_prf.c:198 tcp_output(ffff800000bbac00) at tcp_output+0x2cd2 sys/netinet/tcp_output.c:727 tcp_send(fffffd8067c589a0,fffffd8067a23500,fffffd8066c11200,fffffd8067a23a00) at tcp_send+0xc4 sys/netinet/tcp_usrreq.c:944 sosend(fffffd8067c589a0,fffffd8066c11200,ffff80002fee9d20,0,fffffd8067a23a00,0) at sosend+0x62a pru_send sys/sys/protosw.h:331 [inline] sosend(fffffd8067c589a0,fffffd8066c11200,ffff80002fee9d20,0,fffffd8067a23a00,0) at sosend+0x62a sys/kern/uipc_socket.c:646 sendit(ffff800022d74a88,3,ffff80002fee9ea0,0,ffff80002fee9f90) at sendit+0x65d sys/kern/uipc_syscalls.c:694 sys_sendmsg(ffff800022d74a88,ffff80002fee9f48,ffff80002fee9f90) at sys_sendmsg+0x198 sys/kern/uipc_syscalls.c:601 syscall(ffff80002feea010) at syscall+0x4c3 mi_syscall sys/sys/syscall_mi.h:101 [inline] syscall(ffff80002feea010) at syscall+0x4c3 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x5275b196b40, 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(ffffffff8257e05d) at panic+0x177 sys/kern/subr_prf.c:198 tcp_output(ffff800000bbac00) at tcp_output+0x2cd2 sys/netinet/tcp_output.c:727 tcp_send(fffffd8067c589a0,fffffd8067a23500,fffffd8066c11200,fffffd8067a23a00) at tcp_send+0xc4 sys/netinet/tcp_usrreq.c:944 sosend(fffffd8067c589a0,fffffd8066c11200,ffff80002fee9d20,0,fffffd8067a23a00,0) at sosend+0x62a pru_send sys/sys/protosw.h:331 [inline] sosend(fffffd8067c589a0,fffffd8066c11200,ffff80002fee9d20,0,fffffd8067a23a00,0) at sosend+0x62a sys/kern/uipc_socket.c:646 sendit(ffff800022d74a88,3,ffff80002fee9ea0,0,ffff80002fee9f90) at sendit+0x65d sys/kern/uipc_syscalls.c:694 sys_sendmsg(ffff800022d74a88,ffff80002fee9f48,ffff80002fee9f90) at sys_sendmsg+0x198 sys/kern/uipc_syscalls.c:601 syscall(ffff80002feea010) at syscall+0x4c3 mi_syscall sys/sys/syscall_mi.h:101 [inline] syscall(ffff80002feea010) at syscall+0x4c3 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x5275b196b40, count: -9 ddb{1}> show registers rdi 0 rsi 0x1 rbp 0xffff80002fee9980 rbx 0xffff800020dd9b8f rdx 0xffff800000be44c0 rcx 0 rax 0xffff800022d74a88 r8 0x101010101010101 r9 0x8080808080808080 r10 0x82a7e5c36592c491 r11 0x47300f550cfd299 r12 0xffff800020dd9990 r13 0 r14 0 r15 0x1 rip 0xffffffff824835f8 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff80002fee9970 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{1}> show proc PROC (syz-executor.6) pid=328378 stat=onproc flags process=10 proc=4000000 pri=32, usrpri=81, nice=20 forw=0xffffffffffffffff, list=0xffff800022d75ce8,0xffff8000ffff47f0 process=0xffff8000ffff0440 user=0xffff80002fee5000, vmspace=0xfffffd806f3cecf8 estcpu=36, cpticks=0, pctcpu=0.0 user=0, sys=0, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 89457 174309 99684 32767 2 0x10 syz-executor.5 16230 460653 59639 32767 2 0x10 syz-executor.2 16230 72428 59639 32767 7 0x4000010 syz-executor.2 74286 138917 12245 32767 2 0x10 syz-executor.6 *74286 328378 12245 32767 7 0x4000010 syz-executor.6 77073 139930 36666 32767 2 0x10 syz-executor.1 77073 12146 36666 32767 3 0x4000090 fsleep syz-executor.1 77127 186685 45815 32767 2 0x10 syz-executor.3 77127 83262 45815 32767 3 0x4000090 fsleep syz-executor.3 25304 479492 73424 32767 2 0x10 syz-executor.0 25304 233677 73424 32767 2 0x4000010 syz-executor.0 63748 167150 72605 32767 2 0x10 syz-executor.4 99684 417098 72450 32767 3 0x90 nanoslp syz-executor.5 72450 411095 4981 0 3 0x82 wait syz-executor.5 79633 460574 24373 32767 3 0x90 nanoslp syz-executor.7 24373 140307 4981 0 3 0x82 wait syz-executor.7 97123 486650 0 0 3 0x14200 bored sosplice 45815 241422 63895 32767 3 0x90 nanoslp syz-executor.3 63895 330290 4981 0 3 0x82 wait syz-executor.3 59639 194691 56899 32767 3 0x90 nanoslp syz-executor.2 8992 385397 42968 0 3 0x100082 netio arp 42968 390083 15763 0 3 0x10008a sigsusp sh 12245 157617 76167 32767 3 0x90 nanoslp syz-executor.6 72605 498818 36123 32767 3 0x90 nanoslp syz-executor.4 36123 395391 4981 0 3 0x82 wait syz-executor.4 76167 84626 4981 0 3 0x82 wait syz-executor.6 15763 25995 1 0 3 0x80 wait syz-executor.3 36666 170797 47059 32767 3 0x90 nanoslp syz-executor.1 47059 59637 4981 0 3 0x82 wait syz-executor.1 56899 85775 4981 0 3 0x82 wait syz-executor.2 73424 197584 54416 32767 3 0x90 nanoslp syz-executor.0 54416 431446 4981 0 3 0x82 wait syz-executor.0 4981 316914 98579 0 3 0x82 thrsleep syz-fuzzer 4981 66183 98579 0 3 0x4000082 thrsleep syz-fuzzer 4981 287993 98579 0 3 0x4000082 wait syz-fuzzer 4981 504678 98579 0 3 0x4000082 wait syz-fuzzer 4981 177738 98579 0 3 0x4000082 wait syz-fuzzer 4981 517324 98579 0 3 0x4000082 thrsleep syz-fuzzer 4981 318068 98579 0 3 0x4000082 thrsleep syz-fuzzer 4981 473114 98579 0 3 0x4000082 wait syz-fuzzer 4981 474604 98579 0 3 0x4000082 thrsleep syz-fuzzer 4981 245023 98579 0 3 0x4000082 wait syz-fuzzer 4981 326636 98579 0 3 0x4000082 wait syz-fuzzer 4981 164711 98579 0 3 0x4000082 thrsleep syz-fuzzer 4981 181757 98579 0 3 0x4000082 kqread syz-fuzzer 4981 462574 98579 0 3 0x4000082 thrsleep syz-fuzzer 4981 358955 98579 0 3 0x4000082 wait syz-fuzzer 4981 227987 98579 0 3 0x4000082 wait syz-fuzzer 98579 256165 63228 0 3 0x10008a sigsusp ksh 63228 199124 74267 0 3 0x9a kqread sshd 6073 98534 1 0 3 0x100083 ttyin getty 74267 279048 1 0 3 0x88 kqread sshd 99596 118176 77928 73 3 0x1100090 kqread syslogd 77928 220721 1 0 3 0x100082 netio syslogd 17823 208047 1 0 3 0x100080 kqread resolvd 13583 164205 90944 77 3 0x100092 kqread dhcpleased 8120 511147 90944 77 3 0x100092 kqread dhcpleased 90944 114839 1 0 3 0x80 kqread dhcpleased 97457 65344 0 0 3 0x14200 bored smr 81572 228442 0 0 2 0x14200 zerothread 73004 511865 0 0 3 0x14200 aiodoned aiodoned 41523 424390 0 0 3 0x14200 syncer update 71639 94021 0 0 3 0x14200 cleaner cleaner 1291 244032 0 0 3 0x14200 reaper reaper 79785 521391 0 0 3 0x14200 pgdaemon pagedaemon 37576 346931 0 0 3 0x14200 bored viomb 97439 202716 0 0 3 0x40014200 acpi0 acpi0 86818 82151 0 0 3 0x40014200 idle1 75486 190758 0 0 3 0x14200 bored softnet 19053 476340 0 0 3 0x14200 bored softnet 60967 507703 0 0 3 0x14200 bored softnet 15349 301920 0 0 3 0x14200 bored softnet 53492 236845 0 0 3 0x14200 bored systqmp 40568 496268 0 0 3 0x14200 bored systq 73748 317193 0 0 3 0x40014200 bored softclock 59385 236004 0 0 3 0x40014200 idle0 1 110819 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 16230 (syz-executor.2) thread 0xffff8000ffff47e0 (72428) exclusive rrwlock inode r = 0 (0xfffffd8067ba3f78) #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 (0xfffffd8067ba3b38) #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 74286 (syz-executor.6) thread 0xffff800022d74a88 (328378) exclusive rwlock netlock r = 0 (0xffffffff829ae840) #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 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10209 6412K 6419K 78643K 11316 0 pcb 13 12K 14K 78643K 17 0 rtable 242 6K 7K 78643K 600 0 ifaddr 82 17K 17K 78643K 119 0 counters 56 35K 35K 78643K 66 0 ioctlops 0 0K 2K 78643K 51 0 iov 0 0K 16K 78643K 442 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 4 0 vnodes 1284 80K 80K 78643K 1795 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 9K 78643K 31 0 VM map 2 1K 1K 78643K 2 0 sem 12 0K 0K 78643K 460 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12548 0 file desc 28 105K 109K 78643K 2861 0 sigio 0 0K 0K 78643K 5 0 proc 56 78K 103K 78643K 761 0 subproc 117 7K 7K 78643K 169 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 1 0K 0K 78643K 2213 0 in_multi 99 6K 6K 78643K 166 0 ether_multi 1 0K 0K 78643K 9 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 235 1049K 1049K 78643K 235 0 exec 0 0K 2K 78643K 1057 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 288 95K 109K 78643K 17955 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 69 0 NDP 11 0K 2K 78643K 40 0 temp 128 4726K 4854K 78643K 9889 0 kqueue 12 18K 24K 78643K 222 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 120 237 0 233 3 2 1 2 0 8 0 rtentry 112 164 0 50 4 0 4 4 0 8 0 unpcb 144 2373 0 2358 19 13 6 6 0 8 5 syncache 296 26 0 26 5 4 1 1 0 8 1 tcpqe 32 180 0 180 4 4 0 1 0 8 0 tcpcb 768 2476 0 2465 35 30 5 15 0 8 2 arp 120 28 0 9 1 0 1 1 0 8 0 ipq 40 8 0 7 1 0 1 1 0 8 0 ipqe 40 45 0 44 1 0 1 1 0 8 0 inpcb 368 3520 0 3506 35 30 5 13 0 8 3 nd6 48 41 0 14 1 0 1 1 0 8 0 kcovpl 48 13 0 4 1 0 1 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 645 0 183 29 0 29 29 0 8 0 art_table 32 646 0 183 4 0 4 4 0 8 0 art_node 16 163 0 59 1 0 1 1 0 8 0 semapl 112 458 0 448 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 5138 0 3699 91 0 91 91 0 8 0 ffsino 272 5138 0 3699 97 0 97 97 0 8 0 nchpl 144 9063 0 7429 63 0 63 63 0 8 0 uvmvnodes 80 5316 0 0 109 0 109 109 0 8 0 vnodes 216 5316 0 0 296 0 296 296 0 8 0 namei 1024 29073 0 29072 3 2 1 2 0 8 0 percpumem 16 45 0 5 1 0 1 1 0 8 0 kstatmem 264 32 0 10 2 0 2 2 0 8 0 scxspl 216 26912 0 26912 15 14 1 8 0 8 1 plimitpl 152 571 0 547 5 3 2 2 0 8 1 sigapl 424 3127 0 3069 7 0 7 7 0 8 0 futexpl 64 22176 0 22174 2 1 1 1 0 8 0 knotepl 120 327 0 0 10 0 10 10 0 8 0 kqueuepl 216 794 0 786 14 12 2 8 0 8 1 pipepl 320 555 0 524 17 11 6 8 0 8 3 fdescpl 496 3109 0 3070 8 2 6 6 0 8 1 filepl 152 19584 0 19326 32 16 16 17 0 8 6 lockfpl 104 310 0 308 1 0 1 1 0 8 0 lockfspl 48 91 0 89 1 0 1 1 0 8 0 sessionpl 144 28 0 11 1 0 1 1 0 8 0 pgrppl 48 67 0 50 1 0 1 1 0 8 0 ucredpl 104 3199 0 3181 1 0 1 1 0 8 0 zombiepl 144 3070 0 3069 2 1 1 1 0 8 0 processpl 1064 3127 0 3069 4 0 4 4 0 8 0 procpl 672 7989 0 7911 13 4 9 9 0 8 2 sosppl 168 40 0 40 5 4 1 1 0 8 1 sockpl 488 6357 0 6326 84 63 21 21 0 8 16 mcl64k 65536 15 0 0 2 0 2 2 0 8 0 mcl16k 16384 13 0 0 2 0 2 2 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 17 0 0 3 0 3 3 0 8 0 mcl4k 4096 10 0 0 2 0 2 2 0 8 0 mcl2k2 2112 5 0 0 1 0 1 1 0 8 0 mcl2k 2048 260 0 0 29 1 28 29 0 8 1 mtagpl 96 5 0 0 1 0 1 1 0 8 0 mbufpl 256 496 0 0 24 0 24 24 0 8 0 bufpl 288 7320 0 990 453 0 453 453 0 8 0 anonpl 24 581690 0 569038 135 35 100 106 0 186 3 amapchunkpl 152 51183 0 50534 54 20 34 41 0 158 6 amappl16 200 8796 0 8427 64 35 29 33 0 8 8 amappl15 192 426 0 417 1 0 1 1 0 8 0 amappl14 184 735 0 726 1 0 1 1 0 8 0 amappl13 176 723 0 718 1 0 1 1 0 8 0 amappl12 168 18 0 14 1 0 1 1 0 8 0 amappl11 160 705 0 688 1 0 1 1 0 8 0 amappl10 152 343 0 334 1 0 1 1 0 8 0 amappl9 144 850 0 845 1 0 1 1 0 8 0 amappl8 136 825 0 747 3 0 3 3 0 8 0 amappl7 128 266 0 239 1 0 1 1 0 8 0 amappl6 120 572 0 553 2 1 1 2 0 8 0 amappl5 112 1848 0 1829 1 0 1 1 0 8 0 amappl4 104 2500 0 2462 2 0 2 2 0 8 0 amappl3 96 8965 0 8904 2 0 2 2 0 8 0 amappl2 88 1140 0 1100 2 1 1 2 0 8 0 amappl1 80 78235 0 77459 21 3 18 19 0 8 0 amappl 88 17252 0 17072 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 3110 0 3071 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 3110 0 3071 1 0 1 1 0 8 0 vmmpekpl 168 26879 0 26820 4 0 4 4 0 8 0 vmmpepl 168 306331 0 303431 178 34 144 145 0 357 15 vmsppl 368 3109 0 3071 4 0 4 4 0 8 0 rwobjpl 56 80215 0 73325 100 2 98 98 0 8 0 pdppl 4096 6227 0 6142 167 80 87 87 0 8 2 pvpl 32 1194445 0 1176500 294 113 181 240 0 265 7 pmappl 248 3109 0 3071 4 1 3 3 0 8 0 extentpl 40 56 0 38 1 0 1 1 0 8 0 phpool 112 948 0 115 24 0 24 24 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp x86_ipi_db(ffffffff829b8ff0) 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(ffffffff82b4d158) at __mp_lock+0x133 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff82b4d158) at __mp_lock+0x133 sys/kern/kern_lock.c:147 __mp_acquire_count(ffffffff82b4d158,1) 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(ffff80002fef01f0,1) at sleep_finish+0x180 sys/kern/kern_synch.c:417 tsleep(fffffd806c776c88,11,ffffffff8261c2d8,0) at tsleep+0x12c sys/kern/kern_synch.c:155 biowait(fffffd806c776c88) at biowait+0x91 sys/kern/vfs_bio.c:1268 bwrite(fffffd806c776c88) at bwrite+0x21b sys/kern/vfs_bio.c:769 ffs_update(fffffd8067ba3ee0,1) at ffs_update+0x27d sys/ufs/ffs/ffs_inode.c:113 ufs_makeinode(8000,fffffd806630fb40,ffff80002fef07d8,ffff80002fef0808) at ufs_makeinode+0x489 sys/ufs/ufs/ufs_vnops.c:1852 ufs_create(ffff80002fef0550) at ufs_create+0x41 sys/ufs/ufs/ufs_vnops.c:151 VOP_CREATE(fffffd806630fb40,ffff80002fef07d8,ffff80002fef0808,ffff80002fef05d0) at VOP_CREATE+0xbc sys/kern/vfs_vops.c:103 end trace frame: 0xffff80002fef06f0, count: 0 ddb{0}> trace x86_ipi_db(ffffffff829b8ff0) 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(ffffffff82b4d158) at __mp_lock+0x133 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff82b4d158) at __mp_lock+0x133 sys/kern/kern_lock.c:147 __mp_acquire_count(ffffffff82b4d158,1) 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(ffff80002fef01f0,1) at sleep_finish+0x180 sys/kern/kern_synch.c:417 tsleep(fffffd806c776c88,11,ffffffff8261c2d8,0) at tsleep+0x12c sys/kern/kern_synch.c:155 biowait(fffffd806c776c88) at biowait+0x91 sys/kern/vfs_bio.c:1268 bwrite(fffffd806c776c88) at bwrite+0x21b sys/kern/vfs_bio.c:769 ffs_update(fffffd8067ba3ee0,1) at ffs_update+0x27d sys/ufs/ffs/ffs_inode.c:113 ufs_makeinode(8000,fffffd806630fb40,ffff80002fef07d8,ffff80002fef0808) at ufs_makeinode+0x489 sys/ufs/ufs/ufs_vnops.c:1852 ufs_create(ffff80002fef0550) at ufs_create+0x41 sys/ufs/ufs/ufs_vnops.c:151 VOP_CREATE(fffffd806630fb40,ffff80002fef07d8,ffff80002fef0808,ffff80002fef05d0) at VOP_CREATE+0xbc sys/kern/vfs_vops.c:103 vn_open(ffff80002fef07a8,60f,0) at vn_open+0x28f sys/kern/vfs_vnops.c:116 doopenat(ffff8000ffff47e0,ffffff9c,20000080,60e,0,ffff80002fef0980) at doopenat+0x26a sys/kern/vfs_syscalls.c:1127 syscall(ffff80002fef0a00) at syscall+0x435 mi_syscall sys/sys/syscall_mi.h:101 [inline] syscall(ffff80002fef0a00) at syscall+0x435 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x758670c7720, count: -18 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(ffffffff8257e05d) at panic+0x177 sys/kern/subr_prf.c:198 tcp_output(ffff800000bbac00) at tcp_output+0x2cd2 sys/netinet/tcp_output.c:727 tcp_send(fffffd8067c589a0,fffffd8067a23500,fffffd8066c11200,fffffd8067a23a00) at tcp_send+0xc4 sys/netinet/tcp_usrreq.c:944 sosend(fffffd8067c589a0,fffffd8066c11200,ffff80002fee9d20,0,fffffd8067a23a00,0) at sosend+0x62a pru_send sys/sys/protosw.h:331 [inline] sosend(fffffd8067c589a0,fffffd8066c11200,ffff80002fee9d20,0,fffffd8067a23a00,0) at sosend+0x62a sys/kern/uipc_socket.c:646 sendit(ffff800022d74a88,3,ffff80002fee9ea0,0,ffff80002fee9f90) at sendit+0x65d sys/kern/uipc_syscalls.c:694 sys_sendmsg(ffff800022d74a88,ffff80002fee9f48,ffff80002fee9f90) at sys_sendmsg+0x198 sys/kern/uipc_syscalls.c:601 syscall(ffff80002feea010) at syscall+0x4c3 mi_syscall sys/sys/syscall_mi.h:101 [inline] syscall(ffff80002feea010) at syscall+0x4c3 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x5275b196b40, count: 6 ddb{1}> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff8257e05d) at panic+0x177 sys/kern/subr_prf.c:198 tcp_output(ffff800000bbac00) at tcp_output+0x2cd2 sys/netinet/tcp_output.c:727 tcp_send(fffffd8067c589a0,fffffd8067a23500,fffffd8066c11200,fffffd8067a23a00) at tcp_send+0xc4 sys/netinet/tcp_usrreq.c:944 sosend(fffffd8067c589a0,fffffd8066c11200,ffff80002fee9d20,0,fffffd8067a23a00,0) at sosend+0x62a pru_send sys/sys/protosw.h:331 [inline] sosend(fffffd8067c589a0,fffffd8066c11200,ffff80002fee9d20,0,fffffd8067a23a00,0) at sosend+0x62a sys/kern/uipc_socket.c:646 sendit(ffff800022d74a88,3,ffff80002fee9ea0,0,ffff80002fee9f90) at sendit+0x65d sys/kern/uipc_syscalls.c:694 sys_sendmsg(ffff800022d74a88,ffff80002fee9f48,ffff80002fee9f90) at sys_sendmsg+0x198 sys/kern/uipc_syscalls.c:601 syscall(ffff80002feea010) at syscall+0x4c3 mi_syscall sys/sys/syscall_mi.h:101 [inline] syscall(ffff80002feea010) at syscall+0x4c3 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x5275b196b40, count: -9