kernel: protection fault trap, code=0 Stopped at sys_semop+0x3d5: movzwl 0(%rax),%r15d ddb> ddb> set $lines = 0 ddb> set $maxwidth = 0 ddb> show panic the kernel did not panic ddb> trace sys_semop(ffff80003c94b4e0,ffff80003450dd40,ffff80003450dc90) at sys_semop+0x3d5 sys/kern/sysv_sem.c:617 syscall(ffff80003450dd40) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80003450dd40) at syscall+0x962 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x6cfaca49530, count: -3 ddb> show registers rdi 0 rsi 0 rbp 0xffff80003450dc70 rbx 0xdeaf4152deaf4152 rdx 0 rcx 0 rax 0xdeaf4152deaf4152 r8 0x7f7fffffc000 r9 0 r10 0x47602eafc85a8a06 r11 0x5956d54af85fb459 r12 0 r13 0xfffffd806e617d90 r14 0xffff80003450dd40 r15 0 rip 0xffffffff8164dae5 sys_semop+0x3d5 cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff80003450db80 ss 0x10 sys_semop+0x3d5: movzwl 0(%rax),%r15d ddb> show proc PROC (syz-executor) tid=388911 pid=72984 tcnt=3 stat=onproc flags process=0 proc=4000000 runpri=81, usrpri=81, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80003c94a7e8,0xffff80003c94ad28 process=0xffff80003c9b0da0 user=0xffff800034508000, vmspace=0xfffffd806c239180 estcpu=31, cpticks=0, pctcpu=0.0, user=0, sys=0, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 58675 277588 70524 0 2 0 syz-executor 58675 454820 70524 0 3 0x4000080 fsleep syz-executor 58675 108196 70524 0 2 0x4000000 syz-executor 58675 411176 70524 0 2 0x4000000 syz-executor 14797 500333 76488 0 2 0 syz-executor 14797 11710 76488 0 2 0x4000000 syz-executor 72984 366406 17841 0 2 0 syz-executor *72984 388911 17841 0 7 0x4000000 syz-executor 72984 28134 17841 0 3 0x4000080 fsleep syz-executor 86195 245150 30181 0 2 0 syz-executor 69888 207066 65580 0 2 0 syz-executor 69888 186713 65580 0 3 0x4000080 fsleep syz-executor 69888 470849 65580 0 3 0x4000080 fsleep syz-executor 1346 460646 77484 60928 2 0x10 syz-executor 1346 475040 77484 60928 3 0x4000090 fsleep syz-executor 1346 354998 77484 60928 3 0x4000090 fsleep syz-executor 31143 196071 20260 0 2 0 syz-executor 31143 504673 20260 0 3 0x4000080 fsleep syz-executor 31143 175148 20260 0 3 0x4000080 fsleep syz-executor 48723 204363 0 0 3 0x14280 nfsidl nfsio 40982 347104 0 0 3 0x14280 nfsidl nfsio 44547 334481 0 0 3 0x14280 nfsidl nfsio 55972 311522 0 0 3 0x14280 nfsidl nfsio 28894 196599 0 0 3 0x14280 nfsidl nfsio 84848 220890 0 0 3 0x14280 nfsidl nfsio 68161 374554 0 0 3 0x14280 nfsidl nfsio 44492 218753 0 0 3 0x14280 nfsidl nfsio 85693 240524 0 0 3 0x14280 nfsidl nfsio 71759 220432 0 0 3 0x14280 nfsidl nfsio 21767 481738 0 0 3 0x14280 nfsidl nfsio 30169 82299 0 0 3 0x14280 nfsidl nfsio 44843 68266 0 0 3 0x14280 nfsidl nfsio 98317 434984 0 0 3 0x14280 nfsidl nfsio 93266 16209 0 0 3 0x14280 nfsidl nfsio 6291 518002 0 0 3 0x14280 nfsidl nfsio 68749 380227 0 0 3 0x14280 nfsidl nfsio 21273 251188 0 0 3 0x14280 nfsidl nfsio 84544 406186 0 0 3 0x14280 nfsidl nfsio 35565 394297 0 0 3 0x14280 nfsidl nfsio 65580 487713 90286 0 3 0x82 nanoslp syz-executor 76488 186650 90286 0 2 0x3 syz-executor 70524 232073 90286 0 2 0x3 syz-executor 17841 251500 90286 0 2 0x3 syz-executor 77484 303683 90286 0 3 0x82 nanoslp syz-executor 20260 79028 90286 0 3 0x82 nanoslp syz-executor 90813 433882 90286 0 2 0x2 syz-executor 30181 352472 90286 0 3 0x82 nanoslp syz-executor 90286 419490 75815 0 3 0x82 kqread syz-executor 75815 226970 43350 0 3 0x10008a sigsusp ksh 43350 295255 7665 0 3 0x98 kqread sshd-session 7665 4728 37482 0 3 0x92 kqread sshd-session 3246 343798 1 0 3 0x100083 ttyopn getty 37482 519707 1 0 3 0x88 kqread sshd 78612 443936 52799 73 3 0x1100090 kqread syslogd 52799 316228 1 0 3 0x100082 sbwait syslogd 43327 397728 1 0 3 0x100080 kqread resolvd 81137 261555 7538 77 3 0x100092 kqread dhcpleased 38187 342641 7538 77 3 0x100092 kqread dhcpleased 7538 479928 1 0 3 0x80 kqread dhcpleased 56701 325844 0 0 3 0x14200 bored smr 30567 247523 0 0 2 0x14200 zerothread 81222 480052 0 0 3 0x14200 aiodoned aiodoned 21242 477299 0 0 3 0x14200 syncer update 38041 185080 0 0 3 0x14200 cleaner cleaner 77965 412954 0 0 3 0x14200 reaper reaper 27490 355450 0 0 3 0x14200 pgdaemon pagedaemon 57682 135084 0 0 3 0x14200 bored viomb 83256 122062 0 0 3 0x40014200 acpi0 acpi0 907 102945 0 0 3 0x14200 bored softnet0 95645 372804 0 0 3 0x14200 bored systqmp 46401 352130 0 0 3 0x14200 bored systq 87683 307226 0 0 3 0x40014200 tmoslp softclock 34575 511450 0 0 3 0x40014200 idle0 1 478612 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 10173 11043K 12514K 166960K 12590 0 pcb 17 14K 16K 166960K 161 0 rtable 243 8K 8K 166960K 426 0 pf 32 13K 15K 166960K 52 0 ifaddr 44 8K 8K 166960K 56 0 ifgroup 50 2K 2K 166960K 67 0 sysctl 3 1K 9K 166960K 7 0 counters 32 17K 18K 166960K 43 0 ioctlops 0 0K 4K 166960K 134 0 iov 0 0K 24K 166960K 24 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1467 92K 92K 166960K 1941 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 8 0 VM map 2 1K 1K 166960K 2 0 sem 11 0K 0K 166960K 17 0 dirhash 12 2K 2K 166960K 15 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 17 61K 240K 166960K 448 0 sigio 0 0K 0K 166960K 3 0 proc 60 59K 124K 166960K 503 0 subproc 72 4K 4K 166960K 72 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 32 0 in_multi 102 7K 7K 166960K 109 0 ether_multi 1 0K 0K 166960K 2 0 mrt 0 0K 0K 166960K 5 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 85 387K 387K 166960K 85 0 exec 0 0K 1K 166960K 392 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 0K 166960K 1 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 224 159K 168K 166960K 5622 0 UVM aobj 12 2K 2K 166960K 13 0 pinsyscall 38 76K 96K 166960K 1518 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 13 0 NDP 11 0K 2K 166960K 34 0 temp 49 8641K 8706K 166960K 18499 0 kqueue 14 22K 28K 166960K 78 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 95 0 92 2 0 2 2 0 8 1 rtentry 136 122 0 17 4 0 4 4 0 8 0 unpcb 144 326 0 311 6 0 6 6 0 8 5 syncache 336 4 0 4 1 1 0 1 0 8 0 tcpqe 32 1 0 1 1 1 0 1 0 8 0 tcpcb 736 91 0 85 2 1 1 2 0 8 0 arp 96 20 0 0 1 0 1 1 0 8 0 inpcb 328 328 0 319 9 2 7 7 0 8 5 ip6q 72 1 0 0 1 0 1 1 0 8 0 ip6af 40 1 0 0 1 0 1 1 0 8 0 nd6 112 27 0 2 1 0 1 1 0 8 0 pkpcb 40 4 0 4 2 1 1 1 0 8 1 kcovpl 48 8 0 0 1 0 1 1 0 8 0 mppekey 1024 2 0 2 1 0 1 1 0 8 1 ppxss 1072 10 0 10 1 0 1 1 0 8 1 pfstscr 40 1 0 1 1 0 1 1 0 8 1 pfrktable 1344 2 0 2 1 0 1 1 0 8 1 pfstitem 24 2 0 0 1 0 1 1 0 8 0 pfstkey 128 134 0 132 2 1 1 1 0 8 0 pfstate 384 67 0 66 2 1 1 1 0 8 0 pfrule 1344 2 0 2 2 1 1 1 0 8 1 rttmr 136 2 0 2 1 0 1 1 0 8 1 art_heap8 4096 2 0 0 2 0 2 2 0 8 0 art_heap4 256 524 0 76 31 0 31 31 0 8 1 art_table 40 526 0 76 5 0 5 5 0 8 0 art_node 32 121 0 27 1 0 1 1 0 8 0 sysvmsgpl 40 4 0 2 1 0 1 1 0 8 0 semapl 112 13 0 5 1 0 1 1 0 8 0 shmpl 112 10 0 1 1 0 1 1 0 8 0 dirhash 1024 19 0 2 3 0 3 3 0 8 0 dino2pl 256 2265 0 766 95 0 95 95 0 8 0 ffsino 256 2265 0 766 95 0 95 95 0 8 0 nchpl 144 2875 0 1190 63 0 63 63 0 8 0 rtmask 32 1 0 1 1 0 1 1 0 8 1 vnodes 216 2676 0 0 149 0 149 149 0 8 0 namei 1024 9502 0 9500 4 2 2 2 0 8 1 kstatmem 264 36 0 14 2 0 2 2 0 8 0 scsiplug 72 3 0 3 1 0 1 1 0 8 1 scxspl 216 9172 0 9172 8 7 1 8 1 8 1 plimitpl 152 85 0 68 1 0 1 1 0 8 0 sigapl 424 745 0 683 8 0 8 8 0 8 0 knotepl 120 14650 0 14551 18 8 10 10 0 8 7 kqueuepl 184 128 0 118 2 0 2 2 0 8 1 pipepl 304 205 0 177 3 0 3 3 0 8 0 fdescpl 448 712 0 683 5 1 4 5 0 8 0 filepl 120 4458 0 4247 14 3 11 11 0 8 3 lockfpl 104 124 0 122 1 0 1 1 0 8 0 lockfspl 48 53 0 51 1 0 1 1 0 8 0 sessionpl 144 22 0 14 1 0 1 1 0 8 0 pgrppl 48 32 0 16 1 0 1 1 0 8 0 ucredpl 104 947 0 935 1 0 1 1 0 8 0 zombiepl 144 843 0 843 1 0 1 1 0 8 1 processpl 1152 745 0 683 5 0 5 5 0 8 0 procpl 664 1257 0 1183 7 0 7 7 0 8 0 sockpl 552 808 0 781 13 1 12 12 0 8 8 mcl64k 65536 161 0 161 2 1 1 1 0 8 1 mcl16k 16384 1 0 1 1 0 1 1 0 8 1 mcl9k 9216 2 0 2 1 0 1 1 0 8 1 mcl8k 8192 10 0 10 2 1 1 1 0 8 1 mcl4k 4096 2864 0 2814 14 6 8 14 0 8 1 mcl2k2 2112 2 0 2 1 0 1 1 0 8 1 mcl2k 2048 591 0 590 3 1 2 2 0 8 1 mtagpl 96 6 0 5 2 1 1 1 0 8 0 mbufpl 256 7546 0 7350 21 0 21 21 0 8 6 bufpl 280 3142 0 122 216 0 216 216 0 8 0 anonpl 24 124381 0 121349 56 12 44 44 0 187 19 amapchunkpl 152 17627 0 17173 29 4 25 25 0 158 6 amappl16 200 1933 0 1903 14 3 11 11 0 8 8 amappl15 192 5 0 5 1 1 0 1 0 8 0 amappl14 184 7 0 7 1 1 0 1 0 8 0 amappl13 176 409 0 408 1 0 1 1 0 8 0 amappl12 168 1058 0 1021 2 0 2 2 0 8 0 amappl11 160 5 0 5 1 1 0 1 0 8 0 amappl10 152 42 0 32 1 0 1 1 0 8 0 amappl9 144 251 0 251 1 1 0 1 0 8 0 amappl8 136 24 0 23 1 0 1 1 0 8 0 amappl7 128 77 0 76 1 0 1 1 0 8 0 amappl6 120 257 0 246 1 0 1 1 0 8 0 amappl5 112 88 0 81 1 0 1 1 0 8 0 amappl4 104 384 0 361 1 0 1 1 0 8 0 amappl3 96 3027 0 2943 3 0 3 3 0 8 0 amappl2 88 823 0 755 2 0 2 2 0 8 0 amappl1 80 10363 0 9827 13 0 13 13 0 8 0 amappl 88 4877 0 4723 5 0 5 5 0 92 0 uvmvnodes 80 2676 0 0 55 0 55 55 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 12 0 1 1 0 1 1 0 8 0 uaddrrnd 24 712 0 683 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 712 0 683 1 0 1 1 0 8 0 vmmpekpl 168 7584 0 7554 2 0 2 2 0 8 0 vmmpepl 168 51969 0 50199 93 5 88 88 0 357 8 vmsppl 368 711 0 683 4 1 3 4 0 8 0 rwobjpl 40 18995 0 15479 36 0 36 36 0 8 0 pdppl 4096 1430 0 1366 98 32 66 82 0 8 2 pvpl 32 324342 0 316148 120 18 102 102 0 265 22 pmappl 216 711 0 683 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 387 0 49 10 0 10 10 0 8 0 ddb> machine ddbcpu 0 No such command ddb> trace sys_semop(ffff80003c94b4e0,ffff80003450dd40,ffff80003450dc90) at sys_semop+0x3d5 sys/kern/sysv_sem.c:617 syscall(ffff80003450dd40) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80003450dd40) at syscall+0x962 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x6cfaca49530, count: -3 ddb> machine ddbcpu 1 No such command ddb> trace sys_semop(ffff80003c94b4e0,ffff80003450dd40,ffff80003450dc90) at sys_semop+0x3d5 sys/kern/sysv_sem.c:617 syscall(ffff80003450dd40) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80003450dd40) at syscall+0x962 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x6cfaca49530, count: -3