kernel: protection fault trap, code=0 Stopped at sys_semop+0x45b: 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(ffff80002a79b220,ffff80003c9f5b90,ffff80003c9f5ae0) at sys_semop+0x45b sys/kern/sysv_sem.c:615 syscall(ffff80003c9f5b90) at syscall+0x97e mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80003c9f5b90) at syscall+0x97e sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x41da8005b90, count: -3 ddb> show registers rdi 0 rsi 0 rbp 0xffff80003c9f5ab0 rbx 0 rdx 0 rcx 0 rax 0xdeadbeefdeadbeef r8 0x7f7fffffc000 r9 0 r10 0x30919a79b6be76bc r11 0xa3250cf7c9f8375f r12 0xffff80000148d504 r13 0 r14 0xffff80003c9f5b90 r15 0 rip 0xffffffff830e651b sys_semop+0x45b cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff80003c9f5990 ss 0x10 sys_semop+0x45b: movzwl 0(%rax),%r15d ddb> show proc PROC (syz-executor) tid=7663 pid=23715 tcnt=4 stat=onproc flags process=0 proc=4000000 runpri=50, usrpri=50, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80002a79aa70,0xffff80002a79a2d0 process=0xffff8000339171f0 user=0xffff80003c9f0000, vmspace=0xfffffd806c2985b0 estcpu=9, cpticks=0, pctcpu=0.0, user=0, sys=0, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 23715 233147 78486 0 2 0 syz-executor *23715 7663 78486 0 7 0x4000000 syz-executor 23715 321510 78486 0 3 0x4000080 fsleep syz-executor 23715 473803 78486 0 3 0x4000080 fsleep syz-executor 50500 518646 40519 -1 3 0x90 fsleep syz-executor 50500 280356 40519 -1 3 0x4000090 kqread syz-executor 50500 211761 40519 -1 3 0x4000090 fsleep syz-executor 93689 450130 67516 0 3 0x80 fsleep syz-executor 93689 357122 67516 0 3 0x4000080 tunread syz-executor 23295 283018 14737 0 3 0x80 fsleep syz-executor 23295 356639 14737 0 3 0x4000080 semwait syz-executor 80391 260509 65238 0 3 0x80 fsleep syz-executor 80391 432615 65238 0 3 0x4000080 ttyin syz-executor 67034 234644 47252 0 3 0x80 fsleep syz-executor 67034 37814 47252 0 3 0x4000080 kqread syz-executor 45179 378242 22392 0 3 0x80 fsleep syz-executor 45179 424347 22392 0 3 0x4000080 kqread syz-executor 45179 280270 22392 0 3 0x4000080 fsleep syz-executor 28976 71201 67024 -1 3 0x90 fsleep syz-executor 28976 212868 67024 -1 3 0x4000090 kqsel syz-executor 13190 355290 0 0 3 0x14280 nfsidl nfsio 6026 302952 0 0 3 0x14280 nfsidl nfsio 40653 146160 0 0 3 0x14280 nfsidl nfsio 89225 198087 0 0 3 0x14280 nfsidl nfsio 75689 439319 0 0 3 0x14280 nfsidl nfsio 60134 152052 0 0 3 0x14280 nfsidl nfsio 47466 412053 0 0 3 0x14280 nfsidl nfsio 52136 247125 0 0 3 0x14280 nfsidl nfsio 26816 261060 0 0 3 0x14280 nfsidl nfsio 52187 217546 0 0 3 0x14280 nfsidl nfsio 40489 362976 0 0 3 0x14280 nfsidl nfsio 65134 14070 0 0 3 0x14280 nfsidl nfsio 1014 405822 0 0 3 0x14280 nfsidl nfsio 37445 169215 0 0 3 0x14280 nfsidl nfsio 77508 87690 0 0 3 0x14280 nfsidl nfsio 33098 12801 0 0 3 0x14280 nfsidl nfsio 96606 277250 0 0 3 0x14280 nfsidl nfsio 51311 62826 0 0 3 0x14280 nfsidl nfsio 20203 514031 0 0 3 0x14280 nfsidl nfsio 72241 471798 0 0 3 0x14280 nfsidl nfsio 53503 104841 0 0 3 0x14200 bored sosplice 40519 448569 99222 0 3 0x82 nanoslp syz-executor 14737 506150 99222 0 3 0x82 nanoslp syz-executor 47252 411032 99222 0 3 0x82 nanoslp syz-executor 67516 223323 99222 0 3 0x82 nanoslp syz-executor 22392 410046 99222 0 3 0x82 nanoslp syz-executor 65238 491351 99222 0 3 0x82 nanoslp syz-executor 78486 343198 99222 0 3 0x82 nanoslp syz-executor 67024 388222 99222 0 3 0x82 nanoslp syz-executor 99222 421634 87815 0 3 0x82 kqread syz-executor 87815 368456 51814 0 3 0x10008a sigsusp ksh 51814 220568 23941 0 3 0x98 kqread sshd-session 23941 267881 63169 0 3 0x92 kqread sshd-session 90969 451008 1 0 3 0x100083 ttyin getty 63169 487337 1 0 3 0x88 kqread sshd 56335 49610 81339 73 3 0x1100090 kqread syslogd 81339 78851 1 0 3 0x100082 sbwait syslogd 77872 520868 1 0 3 0x100080 kqread resolvd 82718 45872 22255 77 3 0x100092 kqread dhcpleased 66153 522253 22255 77 3 0x100092 kqread dhcpleased 22255 228605 1 0 3 0x80 kqread dhcpleased 98634 305385 0 0 3 0x14200 bored smr 81361 97236 0 0 2 0x14200 zerothread 84846 430635 0 0 3 0x14200 aiodoned aiodoned 91480 162528 0 0 3 0x14200 syncer update 65349 223613 0 0 3 0x14200 cleaner cleaner 63279 173565 0 0 3 0x14200 reaper reaper 23199 212004 0 0 3 0x14200 pgdaemon pagedaemon 52662 292722 0 0 3 0x14200 bored viomb 39448 405257 0 0 3 0x40014200 acpi0 acpi0 40965 13814 0 0 3 0x14200 bored softnet3 90431 271136 0 0 3 0x14200 bored softnet2 55511 311297 0 0 3 0x14200 bored softnet1 99199 300058 0 0 3 0x14200 bored softnet0 63665 354675 0 0 3 0x14200 bored systqmp 66854 1975 0 0 3 0x14200 bored systq 87648 109088 0 0 3 0x40014200 tmoslp softclock 81261 452567 0 0 3 0x40014200 idle0 1 69478 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 10213 11068K 11426K 166960K 11892 0 pcb 82 16K 16K 166960K 274 0 rtable 180 7K 7K 166960K 392 0 pf 30 12K 13K 166960K 59 0 ifaddr 33 5K 8K 166960K 63 0 ifgroup 50 2K 2K 166960K 88 0 sysctl 3 1K 9K 166960K 7 0 counters 32 17K 18K 166960K 87 0 ioctlops 0 0K 4K 166960K 239 0 iov 0 0K 20K 166960K 16 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1432 90K 91K 166960K 1760 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 11 1K 1K 166960K 17 0 dirhash 12 2K 2K 166960K 15 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 18 65K 240K 166960K 462 0 sigio 0 0K 0K 166960K 11 0 proc 60 59K 100K 166960K 496 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 36 0 in_multi 66 4K 7K 166960K 119 0 ether_multi 1 0K 0K 166960K 4 0 mrt 1 0K 0K 166960K 2 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 253 1129K 1129K 166960K 253 0 exec 0 0K 2K 166960K 369 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 233 144K 154K 166960K 5547 0 UVM aobj 12 2K 4K 166960K 14 0 pinsyscall 39 78K 96K 166960K 1478 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 26 0 NDP 11 0K 2K 166960K 40 0 temp 52 8670K 8791K 166960K 5886 0 kqueue 15 24K 32K 166960K 82 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 65 0 62 1 0 1 1 0 8 0 rtentry 136 115 0 40 4 0 4 4 0 8 0 unpcb 144 290 0 271 7 5 2 6 0 8 1 syncache 336 5 0 5 2 1 1 1 0 8 1 tcpcb 736 95 0 90 1 0 1 1 0 8 0 arp 88 18 0 6 1 0 1 1 0 8 0 inpcb 328 508 0 434 8 1 7 7 0 8 0 ip6q 72 2 0 1 1 0 1 1 0 8 0 ip6af 40 3 0 2 1 0 1 1 0 8 0 nd6 104 26 0 10 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 ppxss 1072 50 0 50 1 0 1 1 0 8 1 pppxif 1384 2 0 2 1 0 1 1 0 8 1 pfrule 1344 1 0 1 1 0 1 1 0 8 1 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 469 0 152 29 0 29 29 0 8 6 art_table 40 470 0 152 5 0 5 5 0 8 0 art_node 32 115 0 47 1 0 1 1 0 8 0 sysvmsgpl 40 11 0 3 1 0 1 1 0 8 0 semupl 112 2 0 2 1 0 1 1 0 8 1 semapl 112 10 0 2 1 0 1 1 0 8 0 shmpl 112 11 0 2 2 1 1 1 0 8 0 dirhash 1024 19 0 2 3 0 3 3 0 8 0 dino2pl 256 2112 0 618 95 0 95 95 0 8 0 ffsino 248 2112 0 618 95 0 95 95 0 8 0 nchpl 144 2701 0 1018 63 0 63 63 0 8 0 rtmask 32 5 0 5 1 0 1 1 0 8 1 uvmvnodes 80 2496 0 0 51 0 51 51 0 8 0 vnodes 216 2496 0 0 139 0 139 139 0 8 0 namei 1024 9177 0 9177 2 1 1 2 0 8 1 kstatmem 264 48 0 26 2 0 2 2 0 8 0 scsiplug 72 4 0 4 1 0 1 1 0 8 1 scxspl 216 10446 0 10400 10 2 8 8 1 8 5 plimitpl 152 63 0 45 1 0 1 1 0 8 0 sigapl 424 739 0 672 9 1 8 8 0 8 0 knotepl 120 13734 0 13676 18 8 10 10 0 8 8 kqueuepl 184 165 0 150 3 0 3 3 0 8 2 pipepl 296 124 0 97 3 0 3 3 0 8 0 fdescpl 440 702 0 672 5 1 4 5 0 8 0 filepl 120 3624 0 3325 16 2 14 14 0 8 4 lockfpl 104 162 0 159 1 0 1 1 0 8 0 lockfspl 48 65 0 62 1 0 1 1 0 8 0 sessionpl 144 23 0 15 1 0 1 1 0 8 0 pgrppl 48 35 0 19 1 0 1 1 0 8 0 ucredpl 104 378 0 363 1 0 1 1 0 8 0 zombiepl 144 815 0 815 1 0 1 1 0 8 1 processpl 1160 739 0 672 5 0 5 5 0 8 0 procpl 656 1228 0 1149 7 0 7 7 0 8 0 sosppl 168 2 0 2 1 0 1 1 0 8 1 sockpl 528 871 0 775 15 8 7 11 0 8 0 mcl64k 65536 10 0 10 2 1 1 1 0 8 1 mcl8k 8192 7 0 7 2 1 1 1 0 8 1 mcl4k 4096 2830 0 2779 16 8 8 15 0 8 1 mcl2k 2048 675 0 668 3 0 3 3 0 8 1 mtagpl 96 16 0 6 1 0 1 1 0 8 0 mbufpl 256 7384 0 7233 20 7 13 16 0 8 0 bufpl 280 3759 0 117 261 0 261 261 0 8 0 anonpl 24 127842 0 122582 44 0 44 44 0 187 10 amapchunkpl 152 17142 0 16510 25 0 25 25 0 158 0 amappl16 200 2476 0 2443 14 0 14 14 0 8 8 amappl15 192 7 0 6 1 0 1 1 0 8 0 amappl14 184 112 0 102 1 0 1 1 0 8 0 amappl13 176 4 0 4 1 1 0 1 0 8 0 amappl12 168 1316 0 1286 3 1 2 3 0 8 0 amappl11 160 45 0 35 1 0 1 1 0 8 0 amappl10 152 8 0 7 1 0 1 1 0 8 0 amappl9 144 237 0 236 1 0 1 1 0 8 0 amappl8 136 26 0 25 1 0 1 1 0 8 0 amappl7 128 103 0 93 1 0 1 1 0 8 0 amappl6 120 173 0 169 1 0 1 1 0 8 0 amappl5 112 120 0 113 1 0 1 1 0 8 0 amappl4 104 298 0 283 1 0 1 1 0 8 0 amappl3 96 3235 0 3120 3 0 3 3 0 8 0 amappl2 88 623 0 569 2 0 2 2 0 8 0 amappl1 80 9439 0 8897 14 1 13 13 0 8 0 amappl 88 4852 0 4683 4 0 4 4 0 92 0 dma32768 32768 1 0 1 1 0 1 1 0 8 1 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 128 255 0 255 2 1 1 1 0 8 1 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 13 0 2 1 0 1 1 0 8 0 uaddrrnd 24 702 0 672 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 702 0 672 1 0 1 1 0 8 0 vmmpekpl 168 7169 0 7140 2 0 2 2 0 8 0 vmmpepl 168 50212 0 48313 99 0 99 99 0 357 12 vmsppl 360 701 0 672 4 1 3 4 0 8 0 rwobjpl 32 18497 0 15140 28 0 28 28 0 8 0 pdppl 4096 1411 0 1344 101 34 67 83 0 8 0 pvpl 32 318535 0 306268 106 0 106 106 0 265 5 pmappl 216 701 0 672 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 281 0 55 8 0 8 8 0 8 0 ddb> machine ddbcpu 0 No such command ddb> trace sys_semop(ffff80002a79b220,ffff80003c9f5b90,ffff80003c9f5ae0) at sys_semop+0x45b sys/kern/sysv_sem.c:615 syscall(ffff80003c9f5b90) at syscall+0x97e mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80003c9f5b90) at syscall+0x97e sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x41da8005b90, count: -3 ddb> machine ddbcpu 1 No such command ddb> trace sys_semop(ffff80002a79b220,ffff80003c9f5b90,ffff80003c9f5ae0) at sys_semop+0x45b sys/kern/sysv_sem.c:615 syscall(ffff80003c9f5b90) at syscall+0x97e mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80003c9f5b90) at syscall+0x97e sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x41da8005b90, count: -3