kernel: protection fault trap, code=0 Stopped at sys_semop+0x2f7: movzwl 0(%r13),%ebx ddb> ddb> set $lines = 0 ddb> set $maxwidth = 0 ddb> show panic the kernel did not panic ddb> trace sys_semop(ffff80002a5c7a98,ffff80002a65b330,ffff80002a65b280) at sys_semop+0x2f7 sys/kern/sysv_sem.c:615 syscall(ffff80002a65b330) at syscall+0x751 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xfb14b5fde40, count: -3 ddb> show registers rdi 0 rsi 0 rbp 0xffff80002a65b250 rbx 0 rdx 0xffff80002a656000 rcx 0 rax 0xdeadbeefdeadbeef r8 0x7f7fffffc000 r9 0xfffffd807f7d7af8 r10 0x6026e36e2a115ea6 r11 0x68251e1946981e3b r12 0 r13 0xdeadbeefdeadbeef r14 0xffff80002a65b330 r15 0xfffffd806c350e70 rip 0xffffffff81aa4ae7 sys_semop+0x2f7 cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff80002a65b150 ss 0x10 sys_semop+0x2f7: movzwl 0(%r13),%ebx ddb> show proc PROC (syz-executor113882395) tid=310877 pid=93763 tcnt=4 stat=onproc flags process=2 proc=4000000 runpri=4, usrpri=52, slppri=4, nice=20 wchan=0x0, wmesg=, ps_single=0x0 forw=0xffffffffffffffff, list=0xffff80002a5c72a0,0xffff80002a61c818 process=0xffff8000ffff50d0 user=0xffff80002a656000, vmspace=0xfffffd80074ba160 estcpu=2, cpticks=0, pctcpu=0.0, user=0, sys=0, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 93763 152628 22222 0 2 0x482 syz-executor113882395 93763 217003 22222 0 3 0x4000082 fsleep syz-executor113882395 *93763 310877 22222 0 7 0x4000002 syz-executor113882395 93763 522996 22222 0 3 0x4000082 fsleep syz-executor113882395 22222 351092 7184 0 3 0x10008a sigsusp ksh 7184 353210 35762 0 3 0x9a kqread sshd 52309 486534 1 0 3 0x100083 ttyin getty 35762 230693 1 0 3 0x88 kqread sshd 26058 456709 8474 73 3 0x1100090 kqread syslogd 8474 520725 1 0 3 0x100082 netio syslogd 22939 381312 1 0 3 0x100080 kqread resolvd 92199 311396 92023 77 3 0x100092 kqread dhcpleased 15952 83569 92023 77 3 0x100092 kqread dhcpleased 92023 35345 1 0 3 0x80 kqread dhcpleased 78385 254162 0 0 3 0x14200 bored smr 38952 175134 0 0 3 0x14200 pgzero zerothread 99740 30578 0 0 3 0x14200 aiodoned aiodoned 63178 139637 0 0 3 0x14200 syncer update 51128 163003 0 0 3 0x14200 cleaner cleaner 67979 311066 0 0 3 0x14200 reaper reaper 55470 25643 0 0 3 0x14200 pgdaemon pagedaemon 26564 166329 0 0 3 0x14200 bored viomb 41572 145179 0 0 3 0x40014200 acpi0 acpi0 29343 398639 0 0 3 0x14200 bored softnet3 56889 393905 0 0 3 0x14200 bored softnet2 59457 403910 0 0 3 0x14200 bored softnet1 17941 312070 0 0 3 0x14200 bored softnet0 812 427211 0 0 3 0x14200 bored systqmp 98314 462004 0 0 3 0x14200 bored systq 60356 320132 0 0 3 0x40014200 tmoslp softclock 82014 213226 0 0 3 0x40014200 idle0 1 99025 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb> show all locks No such command ddb> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10137 6382K 6413K 166960K 11215 0 pcb 15 10K 10K 166960K 15 0 rtable 58 1K 2K 166960K 110 0 pf 12 6K 6K 166960K 12 0 ifaddr 11 5K 5K 166960K 11 0 ifgroup 17 1K 1K 166960K 17 0 counters 22 16K 16K 166960K 22 0 ioctlops 0 0K 2K 166960K 21 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1174 73K 74K 166960K 1187 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 1K 166960K 2 0 VM map 2 1K 1K 166960K 2 0 sem 3 0K 0K 166960K 4 0 dirhash 12 2K 2K 166960K 12 0 ACPI 1697 195K 286K 166960K 12548 0 file desc 1 0K 0K 166960K 1 0 proc 55 58K 59K 166960K 246 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 in_multi 11 0K 0K 166960K 11 0 ether_multi 1 0K 0K 166960K 1 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 25 122K 122K 166960K 25 0 exec 0 0K 1K 166960K 243 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 98 12K 12K 166960K 2213 0 UVM aobj 3 2K 2K 166960K 3 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 NDP 3 0K 0K 166960K 3 0 temp 1 6748K 6812K 166960K 2781 0 kqueue 11 16K 18K 166960K 24 0 SYN cache 2 16K 16K 166960K 2 0 ddb> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle rtpcb 120 20 0 17 1 0 1 1 0 8 0 rtentry 112 23 0 1 1 0 1 1 0 8 0 unpcb 144 33 0 20 1 0 1 1 0 8 0 syncache 336 5 0 5 1 0 1 1 0 8 1 tcpqe 32 73 0 73 1 0 1 1 0 8 1 tcpcb 808 8 0 5 1 0 1 1 0 8 0 arp 88 2 0 0 1 0 1 1 0 8 0 inpcb 360 26 0 20 1 0 1 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 97 0 0 7 0 7 7 0 8 0 art_table 32 98 0 0 1 0 1 1 0 8 0 art_node 16 22 0 2 1 0 1 1 0 8 0 semapl 112 1 0 1 1 0 1 1 0 8 1 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 1423 0 37 87 0 87 87 0 8 0 ffsino 240 1423 0 37 82 0 82 82 0 8 0 nchpl 144 1606 0 47 58 0 58 58 0 8 0 uvmvnodes 80 1432 0 0 30 0 30 30 0 8 0 vnodes 216 1432 0 0 80 0 80 80 0 8 0 namei 1024 4258 0 4258 1 0 1 1 0 8 1 kstatmem 264 6 0 0 1 0 1 1 0 8 0 scxspl 216 5322 0 5322 8 0 8 8 1 8 8 plimitpl 152 17 0 10 1 0 1 1 0 8 0 sigapl 424 308 0 279 4 0 4 4 0 8 0 futexpl 64 8 0 6 1 0 1 1 0 8 0 knotepl 120 3728 0 3699 2 0 2 2 0 8 1 kqueuepl 184 20 0 13 1 0 1 1 0 8 0 pipepl 288 87 0 84 1 0 1 1 0 8 0 fdescpl 432 292 0 279 2 0 2 2 0 8 0 filepl 120 1127 0 1073 2 0 2 2 0 8 0 lockfpl 104 6 0 4 1 0 1 1 0 8 0 lockfspl 48 4 0 2 1 0 1 1 0 8 0 sessionpl 144 17 0 9 1 0 1 1 0 8 0 pgrppl 48 17 0 9 1 0 1 1 0 8 0 ucredpl 104 66 0 56 1 0 1 1 0 8 0 zombiepl 144 279 0 279 1 0 1 1 0 8 1 processpl 1072 308 0 279 3 0 3 3 0 8 0 procpl 680 311 0 279 3 0 3 3 0 8 0 sockpl 488 79 0 57 3 0 3 3 0 8 0 mcl8k 8192 4 0 4 1 0 1 1 0 8 1 mcl4k 4096 10 0 10 1 0 1 1 0 8 1 mcl2k 2048 12212 0 12170 33 19 14 32 0 8 7 mtagpl 96 4 0 4 1 0 1 1 0 8 1 mbufpl 256 19597 0 19550 17 5 12 17 0 8 6 bufpl 280 2514 0 86 174 0 174 174 0 8 0 anonpl 24 212230 0 210341 24 0 24 24 0 188 12 amapchunkpl 152 9280 0 9112 7 0 7 7 0 158 0 amappl16 200 6224 0 6224 5 0 5 5 0 8 5 amappl15 192 16 0 16 1 0 1 1 0 8 1 amappl14 184 109 0 99 1 0 1 1 0 8 0 amappl13 176 10 0 10 1 0 1 1 0 8 1 amappl12 168 799 0 786 1 0 1 1 0 8 0 amappl11 160 51 0 41 1 0 1 1 0 8 0 amappl10 152 19 0 19 1 0 1 1 0 8 1 amappl9 144 104 0 104 1 0 1 1 0 8 1 amappl8 136 55 0 53 1 0 1 1 0 8 0 amappl7 128 87 0 76 1 0 1 1 0 8 0 amappl6 120 119 0 114 1 0 1 1 0 8 0 amappl5 112 109 0 101 1 0 1 1 0 8 0 amappl4 104 324 0 308 1 0 1 1 0 8 0 amappl3 96 2484 0 2446 1 0 1 1 0 8 0 amappl2 88 619 0 570 2 0 2 2 0 8 0 amappl1 80 8820 0 8391 11 0 11 11 0 8 0 amappl 88 1945 0 1886 2 0 2 2 0 92 0 dma4096 4096 1 0 1 1 0 1 1 0 8 1 dma1024 1024 1 0 0 1 0 1 1 0 8 0 dma256 256 6 0 6 1 0 1 1 0 8 1 dma128 128 253 0 253 1 0 1 1 0 8 1 dma64 64 6 0 6 1 0 1 1 0 8 1 dma32 32 7 0 7 1 0 1 1 0 8 1 dma16 16 18 0 17 1 0 1 1 0 8 0 aobjpl 72 2 0 0 1 0 1 1 0 8 0 uaddrrnd 24 292 0 279 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 292 0 279 1 0 1 1 0 8 0 vmmpekpl 168 6777 0 6760 1 0 1 1 0 8 0 vmmpepl 168 35111 0 34174 46 0 46 46 0 357 5 vmsppl 352 291 0 279 2 0 2 2 0 8 0 rwobjpl 24 19927 0 17856 14 0 14 14 0 8 1 pdppl 4096 590 0 558 48 14 34 40 0 8 2 pvpl 32 306152 0 301874 52 0 52 52 0 265 15 pmappl 216 291 0 279 1 0 1 1 0 8 0 extentpl 40 56 0 38 1 0 1 1 0 8 0 phpool 112 290 0 38 8 0 8 8 0 8 0 ddb> machine ddbcpu 0 No such command ddb> trace sys_semop(ffff80002a5c7a98,ffff80002a65b330,ffff80002a65b280) at sys_semop+0x2f7 sys/kern/sysv_sem.c:615 syscall(ffff80002a65b330) at syscall+0x751 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xfb14b5fde40, count: -3 ddb> machine ddbcpu 1 No such command ddb> trace sys_semop(ffff80002a5c7a98,ffff80002a65b330,ffff80002a65b280) at sys_semop+0x2f7 sys/kern/sysv_sem.c:615 syscall(ffff80002a65b330) at syscall+0x751 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xfb14b5fde40, count: -3 ddb>