panic: unhandled af 127 Stopped at db_enter+0x25: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND 356169 47224 32767 0x10 0 1 syz-executor *362217 90991 0 0x2 0 0 syz-executor db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff834eaff2) at panic+0x1e5 sys/kern/subr_prf.c:198 unhandled_af(7f) at unhandled_af+0x1a sys/net/if.c:-1 if_output_tso(ffff80000004e858,ffff80002a287cf0,ffff800000c43c60,fffff00076a6d9a0,5dc) at if_output_tso+0x22b ip_output(fffff00060fd1300,0,fffff0006fc39300,800,0,fffff0006fc39398,6e901b8b5c4c0f75) at ip_output+0x107f sys/netinet/ip_output.c:437 tcp_output(ffff8000015bcb80) at tcp_output+0x36e3 sys/netinet/tcp_output.c:1070 tcp_send(ffff8000015babd0,fffff00060fcc400,0,0) at tcp_send+0x191 sys/netinet/tcp_usrreq.c:859 sosend(ffff8000015babd0,0,ffff80002a288138,0,0,80) at sosend+0x804 sys/kern/uipc_socket.c:-1 dofilewritev(ffff800045ffc538,3,ffff80002a288138,0,ffff80002a2881f0) at dofilewritev+0x2bd sys/kern/sys_generic.c:384 sys_write(ffff800045ffc538,ffff80002a2882a0,ffff80002a2881f0) at sys_write+0xa2 sys/kern/sys_generic.c:300 syscall(ffff80002a2882a0) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a2882a0) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:791 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x6fd282393930, count: 3 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{0}> ddb{0}> set $lines = 0 ddb{0}> set $maxwidth = 0 ddb{0}> show panic *cpu0: unhandled af 127 ddb{0}> show kasan No such command ddb{0}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff834eaff2) at panic+0x1e5 sys/kern/subr_prf.c:198 unhandled_af(7f) at unhandled_af+0x1a sys/net/if.c:-1 if_output_tso(ffff80000004e858,ffff80002a287cf0,ffff800000c43c60,fffff00076a6d9a0,5dc) at if_output_tso+0x22b ip_output(fffff00060fd1300,0,fffff0006fc39300,800,0,fffff0006fc39398,6e901b8b5c4c0f75) at ip_output+0x107f sys/netinet/ip_output.c:437 tcp_output(ffff8000015bcb80) at tcp_output+0x36e3 sys/netinet/tcp_output.c:1070 tcp_send(ffff8000015babd0,fffff00060fcc400,0,0) at tcp_send+0x191 sys/netinet/tcp_usrreq.c:859 sosend(ffff8000015babd0,0,ffff80002a288138,0,0,80) at sosend+0x804 sys/kern/uipc_socket.c:-1 dofilewritev(ffff800045ffc538,3,ffff80002a288138,0,ffff80002a2881f0) at dofilewritev+0x2bd sys/kern/sys_generic.c:384 sys_write(ffff800045ffc538,ffff80002a2882a0,ffff80002a2881f0) at sys_write+0xa2 sys/kern/sys_generic.c:300 syscall(ffff80002a2882a0) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a2882a0) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:791 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x6fd282393930, count: -12 ddb{0}> show registers rdi 0 rsi 0x1 rbp 0xffff80002a287ad0 rbx 0xffffffff839e0e07 cpu_info_full_primary+0x2e07 rdx 0 rcx 0xffff800045ffc538 rax 0xffffffff839dfff0 cpu_info_full_primary+0x1ff0 r8 0x101010101010101 r9 0x8080808080808080 r10 0x406656c3938f26a5 r11 0xe04719767b279b33 r12 0xffffffff839e0c08 cpu_info_full_primary+0x2c08 r13 0 r14 0 r15 0x1 rip 0xffffffff833a4ea5 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff80002a287ac0 ss 0x10 db_enter+0x25: addq $0x8,%rsp ddb{0}> show proc PROC (syz-executor) tid=362217 pid=90991 tcnt=1 stat=onproc flags process=2 proc=0 runpri=24, usrpri=74, slppri=24, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff800045ffdc90,0xffff80003c3de2d0 process=0xffff800045ff4008 user=0xffff80002a283000, vmspace=0xfffff0000b1cb1e8 estcpu=24, cpticks=39, pctcpu=0.20, user=4, sys=32, intr=3 ddb{0}> ps PID TID PPID UID S PRLAGS PFLAGS WAIT COMMAND 74859 214934 3908 32767 2 0x10 0 syz-executor 47224 356169 7012 32767 7 0x10 0 syz-executor 47224 49769 7012 32767 2 0x10 0x4000000 syz-executor 8531 18969 30062 0 2 0 0 syz-executor 1495 486642 69251 32767 2 0x10 0 syz-executor 1495 515939 69251 32767 3 0x10 0x4000080 fsleep syz-executor 27438 420280 90991 0 2 0x2 0 syz-executor 29645 125484 82089 32767 3 0x10 0x80 nanoslp syz-executor 29645 91986 82089 32767 3 0x10 0x4000080 lockf syz-executor 29645 14704 82089 32767 3 0x10 0x4000080 fsleep syz-executor 29645 344628 82089 32767 3 0x10 0x4000080 fsleep syz-executor 30062 486448 90991 0 3 0x2 0x80 wait syz-executor 68353 509762 7772 32767 2 0x10 0 syz-executor 7772 356389 90991 0 3 0x2 0x80 wait syz-executor 7012 265181 9238 32767 3 0x10 0x80 nanoslp syz-executor 9238 419411 90991 0 3 0x2 0x80 wait syz-executor 69251 277012 65526 32767 3 0x10 0x80 nanoslp syz-executor 65526 39575 90991 0 3 0x2 0x80 wait syz-executor 82089 272518 35284 32767 3 0x10 0x80 nanoslp syz-executor 35284 148744 90991 0 3 0x2 0x80 wait syz-executor 30770 126594 42874 32767 3 0x10 0x80 wait syz-executor 42874 242187 90991 0 3 0x2 0x80 wait syz-executor 3908 415374 90480 32767 3 0x10 0x80 nanoslp syz-executor 90480 259963 90991 0 3 0x2 0x80 wait syz-executor *90991 362217 22179 0 7 0x2 0 syz-executor 22179 111314 27190 0 3 0x100002 0x88 sigsusp ksh 27190 254349 39299 0 3 0x10 0x88 kqread sshd-session 39299 94165 88834 0 3 0x12 0x80 kqread sshd-session 10490 349258 1 0 3 0x100003 0x80 ttyin getty 88834 193922 1 0 3 0 0x88 kqread sshd 14575 335160 46740 73 3 0x1100010 0x80 kqread syslogd 46740 95397 1 0 3 0x100002 0x80 sbwait syslogd 62268 116987 1 0 3 0x100000 0x80 kqread resolvd 33301 362736 3918 77 3 0x100012 0x80 kqread dhcpleased 96187 453151 3918 77 3 0x100012 0x80 kqread dhcpleased 3918 518146 1 0 3 0 0x80 kqread dhcpleased 16825 129670 0 0 3 0x14000 0x200 bored smr 18813 82235 0 0 2 0x14000 0x200 zerothread 19933 318611 0 0 3 0x14000 0x200 aiodoned aiodoned 5540 203583 0 0 3 0x14000 0x200 syncer update 7626 420370 0 0 3 0x14000 0x200 cleaner cleaner 60212 96494 0 0 3 0x14000 0x200 reaper reaper 77877 160980 0 0 3 0x14000 0x200 pgdaemon pagedaemon 96640 327534 0 0 3 0x14000 0x200 bored viomb 73526 450404 0 0 3 0x14000 0x40000200 acpi0 acpi0 67017 244372 0 0 3 0x14000 0x40000200 idle1 78875 195046 0 0 3 0x14000 0x200 bored softnet1 41955 344693 0 0 3 0x14000 0x200 bored softnet0 75594 511016 0 0 2 0x14000 0x200 systqmp 44317 189960 0 0 3 0x14000 0x200 bored systq 48214 465333 0 0 3 0x14000 0x200 tmoslp softclockmp 80569 452107 0 0 3 0x14000 0x40000200 tmoslp softclock 98217 438227 0 0 3 0x14000 0x40000200 idle0 1 313492 0 0 3 0x2 0x80 wait init 0 0 -1 0 3 0x10000 0x200 scheduler swapper ddb{0}> show all locks Process 47224 (syz-executor) thread 0xffff800045fe7778 (49769) exclusive rrwlock inode r = 0 (0xfffff0007604ada8) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 rw_do_enter_write+0x419 sys/kern/kern_rwlock.c:320 #2 rrw_enter+0xc6 sys/kern/kern_rwlock.c:621 #3 VOP_LOCK+0xbd sys/kern/vfs_vops.c:527 #4 ufs_ihashins+0x4f ufs_ihash sys/ufs/ufs/ufs_ihash.c:-1 [inline] #4 ufs_ihashins+0x4f sys/ufs/ufs/ufs_ihash.c:150 #5 ffs_vget+0x187 sys/ufs/ffs/ffs_vfsops.c:1232 #6 ffs_inode_alloc+0x279 sys/ufs/ffs/ffs_alloc.c:393 #7 ufs_mkdir+0xfc sys/ufs/ufs/ufs_vnops.c:1112 #8 VOP_MKDIR+0x101 sys/kern/vfs_vops.c:394 #9 domkdirat+0x179 sys/kern/vfs_syscalls.c:3063 #10 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #10 syscall+0xb17 sys/arch/amd64/amd64/trap.c:791 #11 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffff0007604a590) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 rw_do_enter_write+0x419 sys/kern/kern_rwlock.c:320 #2 rrw_enter+0xc6 sys/kern/kern_rwlock.c:621 #3 VOP_LOCK+0xbd sys/kern/vfs_vops.c:527 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:576 #5 vfs_lookup+0x12b sys/kern/vfs_lookup.c:431 #6 namei+0x7c5 sys/kern/vfs_lookup.c:250 #7 domkdirat+0x8b sys/kern/vfs_syscalls.c:3048 #8 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #8 syscall+0xb17 sys/arch/amd64/amd64/trap.c:791 #9 Xsyscall+0x128 Process 90991 (syz-executor) thread 0xffff800045ffc538 (362217) exclusive rwlock inet46 r = 0 (0xffff8000015babf0) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 rw_do_enter_write+0x419 sys/kern/kern_rwlock.c:320 #2 sosend+0x78e sys/kern/uipc_socket.c:-1 #3 dofilewritev+0x2bd sys/kern/sys_generic.c:384 #4 sys_write+0xa2 sys/kern/sys_generic.c:300 #5 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] #5 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:791 #6 Xsyscall+0x128 shared rwlock netlock r = 0 (0xffffffff839a4940) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 rw_do_enter_read+0x3e8 sys/kern/kern_rwlock.c:413 #2 solock_shared+0x6e sys/kern/uipc_socket2.c:343 #3 sosend+0x78e sys/kern/uipc_socket.c:-1 #4 dofilewritev+0x2bd sys/kern/sys_generic.c:384 #5 sys_write+0xa2 sys/kern/sys_generic.c:300 #6 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] #6 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:791 #7 Xsyscall+0x128 exclusive rwlock sbufsnd r = 0 (0xffff8000015badb8) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 rw_do_enter_write+0x419 sys/kern/kern_rwlock.c:320 #2 sblock+0xb6 sys/kern/uipc_socket2.c:536 #3 sosend+0x2e9 sys/kern/uipc_socket.c:639 #4 dofilewritev+0x2bd sys/kern/sys_generic.c:384 #5 sys_write+0xa2 sys/kern/sys_generic.c:300 #6 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] #6 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:791 #7 Xsyscall+0x128 Process 75594 (systqmp) thread 0xffff800045ffe000 (511016) shared rwlock systqmp r = 0 (0xffffffff838edd98) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 taskq_thread+0x12a sys/kern/kern_task.c:442 #2 proc_trampoline+0x10 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 11046 12014K 12034K 166960K 12209 0 pcb 17 12K 12K 166960K 17 0 rtable 193 5K 7K 166960K 1014 0 pf 27 16K 16K 166960K 75 0 ifaddr 34 6K 7K 166960K 136 0 ifgroup 42 1K 2K 166960K 138 0 sysctl 3 1K 9K 166960K 7 0 counters 66 36K 37K 166960K 114 0 ioctlops 0 0K 4K 166960K 60 0 iov 0 0K 13K 166960K 114 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1287 81K 81K 166960K 1752 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 9K 166960K 9 0 VM map 2 1K 1K 166960K 2 0 sem 27 6K 6K 166960K 120 0 dirhash 15 2K 2K 166960K 15 0 ACPI 1734 201K 291K 166960K 11964 0 file desc 22 81K 121K 166960K 766 0 sigio 0 0K 0K 166960K 4 0 proc 58 99K 147K 166960K 1121 0 subproc 69 4K 4K 166960K 393 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 55 0 in_multi 77 5K 6K 166960K 346 0 ether_multi 1 0K 0K 166960K 3 0 mrt 0 0K 0K 166960K 14 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 73 334K 334K 166960K 73 0 exec 0 0K 1K 166960K 942 0 fusefs mount 1 32K 32K 166960K 1 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 220 167K 189K 166960K 6806 0 UVM aobj 11 3K 3K 166960K 11 0 pinsyscall 43 86K 111K 166960K 2418 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 9 0 NDP 9 0K 2K 166960K 93 0 temp 34 9118K 9138K 166960K 7441 0 kqueue 13 20K 28K 166960K 63 0 SYN cache 2 16K 16K 166960K 2 0 ddb{0}> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle plcache 128 28 0 0 1 0 1 1 0 8 0 rtpcb 120 123 0 120 2 1 1 2 0 8 0 rtentry 176 354 0 266 6 0 6 6 0 8 1 unpcb 144 259 0 242 4 3 1 4 0 8 0 syncache 336 6 0 6 1 0 1 1 0 8 1 tcpcb 736 149 0 78 7 0 7 7 0 8 0 arp 136 62 0 48 1 0 1 1 0 8 0 ipq 40 2 0 0 1 0 1 1 0 8 0 ipqe 40 2 0 0 1 0 1 1 0 8 0 inpcb 328 472 0 395 9 2 7 7 0 8 0 nd6 152 91 0 73 1 0 1 1 0 8 0 kcovpl 48 43 0 36 1 0 1 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 1431 0 1017 29 0 29 29 0 8 0 art_table 40 1432 0 1017 5 0 5 5 0 8 0 art_node 32 354 0 264 1 0 1 1 0 8 0 sysvmsgpl 40 2 0 2 1 1 0 1 0 8 0 semupl 112 2 0 2 1 1 0 1 0 8 0 semapl 72 85 0 60 1 0 1 1 0 8 0 shmpl 112 8 0 0 1 0 1 1 0 8 0 dirhash 1024 19 0 0 3 0 3 3 0 8 0 dino2pl 256 1978 0 437 97 0 97 97 0 8 0 ffsino 296 1978 0 437 119 0 119 119 0 8 0 nchpl 144 2480 0 705 66 0 66 66 0 8 0 vnodes 216 2380 0 0 133 0 133 133 0 8 0 namei 1024 11374 0 11373 4 3 1 3 0 8 0 percpumem 16 73 0 24 1 0 1 1 0 8 0 kstatmem 264 69 0 48 2 0 2 2 0 8 0 scxspl 216 8581 0 8581 3 2 1 2 1 8 1 plimitpl 152 211 0 187 2 0 2 2 0 8 0 sigapl 424 985 0 935 7 0 7 7 0 8 0 knotepl 120 307 0 0 10 0 10 10 0 8 0 kqueuepl 224 68 0 58 1 0 1 1 0 8 0 pipepl 344 247 0 220 4 0 4 4 0 8 1 fdescpl 528 969 0 935 3 0 3 3 0 8 0 filepl 160 4073 0 3795 13 1 12 13 0 8 0 lockfpl 104 154 0 148 1 0 1 1 0 8 0 lockfspl 48 34 0 29 1 0 1 1 0 8 0 sessionpl 144 78 0 62 1 0 1 1 0 8 0 pgrppl 48 124 0 100 1 0 1 1 0 8 0 ucredpl 104 686 0 669 1 0 1 1 0 8 0 zombiepl 144 936 0 935 1 0 1 1 0 8 0 processpl 1232 985 0 935 5 0 5 5 0 8 0 procpl 664 1366 0 1311 6 0 6 6 0 8 0 sockpl 752 922 0 825 12 2 10 10 0 8 0 mcl64k 65536 2 0 0 1 0 1 1 0 8 0 mcl16k 16384 2 0 0 1 0 1 1 0 8 0 mcl12k 12288 1 0 0 1 0 1 1 0 8 0 mcl9k128 9344 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 2 0 0 1 0 1 1 0 8 0 mcl4k 4096 133 0 0 17 0 17 17 0 8 0 mcl2k 2048 28 0 0 4 0 4 4 0 8 0 mextrefs 64 27 0 0 1 0 1 1 0 8 0 mtagpl 96 2 0 0 1 0 1 1 0 8 0 mbufpl 256 1172 0 0 74 0 74 74 0 8 0 bufpl 272 3036 0 105 196 0 196 196 0 8 0 anonpl 32 7317 0 0 60 0 60 60 0 247 0 amapchunkpl 152 20285 0 19834 35 0 35 35 0 158 12 amappl16 200 1127 0 1111 4 2 2 4 0 8 0 amappl15 192 1 0 1 1 1 0 1 0 8 0 amappl14 184 667 0 666 1 0 1 1 0 8 0 amappl13 176 199 0 189 1 0 1 1 0 8 0 amappl12 168 1284 0 1253 2 0 2 2 0 8 0 amappl11 160 8 0 8 2 2 0 1 0 8 0 amappl10 152 61 0 51 1 0 1 1 0 8 0 amappl9 144 301 0 301 1 1 0 1 0 8 0 amappl8 136 203 0 202 1 0 1 1 0 8 0 amappl7 128 182 0 171 1 0 1 1 0 8 0 amappl6 120 370 0 368 1 0 1 1 0 8 0 amappl5 112 92 0 84 1 0 1 1 0 8 0 amappl4 104 379 0 363 1 0 1 1 0 8 0 amappl3 96 3663 0 3578 4 1 3 3 0 8 0 amappl2 88 998 0 927 2 0 2 2 0 8 0 amappl1 80 14529 0 13976 15 0 15 15 0 8 1 amappl 88 5696 0 5541 5 0 5 5 0 92 0 uvmvnodes 80 113 0 0 3 0 3 3 0 8 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 10 0 0 1 0 1 1 0 8 0 uaddrrnd 24 969 0 935 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 969 0 935 1 0 1 1 0 8 0 vmmpekpl 168 9547 0 9485 4 0 4 4 0 8 1 vmmpepl 168 69297 0 67403 95 1 94 95 0 357 6 vmsppl 488 968 0 935 7 1 6 6 0 8 0 rwobjpl 80 21003 0 20079 23 0 23 23 0 8 1 pdppl 4096 1945 0 1870 137 58 79 95 0 8 4 pvpl 32 14528 0 0 118 0 118 118 0 265 0 pmappl 256 968 0 935 4 1 3 3 0 8 0 extentpl 40 46 0 28 1 0 1 1 0 8 0 phpool 112 580 0 64 15 0 15 15 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff834eaff2) at panic+0x1e5 sys/kern/subr_prf.c:198 unhandled_af(7f) at unhandled_af+0x1a sys/net/if.c:-1 if_output_tso(ffff80000004e858,ffff80002a287cf0,ffff800000c43c60,fffff00076a6d9a0,5dc) at if_output_tso+0x22b ip_output(fffff00060fd1300,0,fffff0006fc39300,800,0,fffff0006fc39398,6e901b8b5c4c0f75) at ip_output+0x107f sys/netinet/ip_output.c:437 tcp_output(ffff8000015bcb80) at tcp_output+0x36e3 sys/netinet/tcp_output.c:1070 tcp_send(ffff8000015babd0,fffff00060fcc400,0,0) at tcp_send+0x191 sys/netinet/tcp_usrreq.c:859 sosend(ffff8000015babd0,0,ffff80002a288138,0,0,80) at sosend+0x804 sys/kern/uipc_socket.c:-1 dofilewritev(ffff800045ffc538,3,ffff80002a288138,0,ffff80002a2881f0) at dofilewritev+0x2bd sys/kern/sys_generic.c:384 sys_write(ffff800045ffc538,ffff80002a2882a0,ffff80002a2881f0) at sys_write+0xa2 sys/kern/sys_generic.c:300 syscall(ffff80002a2882a0) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a2882a0) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:791 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x6fd282393930, count: -12 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffff80002999dff0) at x86_ipi_db+0x27 sys/arch/amd64/amd64/db_interface.c:394 x86_ipi_handler() at x86_ipi_handler+0xd9 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27 end of kernel end trace frame: 0x703447011640, count: 12 ddb{1}> trace x86_ipi_db(ffff80002999dff0) at x86_ipi_db+0x27 sys/arch/amd64/amd64/db_interface.c:394 x86_ipi_handler() at x86_ipi_handler+0xd9 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27 end of kernel end trace frame: 0x703447011640, count: -3