kernel: protection fault trap, code=0 Stopped at sys_semop+0x3d5: movzwl 0(%rax),%r15d ddb{0}> ddb{0}> set $lines = 0 ddb{0}> set $maxwidth = 0 ddb{0}> show panic the kernel did not panic ddb{0}> trace sys_semop(ffff80002a260fd0,ffff80002a35e100,ffff80002a35e050) at sys_semop+0x3d5 sys/kern/sysv_sem.c:619 syscall(ffff80002a35e100) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a35e100) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:775 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x80d3fd835d0, count: -3 ddb{0}> show registers rdi 0 rsi 0 rbp 0xffff80002a35e020 rbx 0xdeadbeefdeadbeef rdx 0 rcx 0xffff80002a260fd0 rax 0xdeadbeefdeadbeef r8 0x7f7fffffc000 r9 0 r10 0x7487b46ef035c449 r11 0x7cb844c032651b1 r12 0 r13 0xfffffd806c05ca80 r14 0xffff80002a35e100 r15 0 rip 0xffffffff82b19495 sys_semop+0x3d5 cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff80002a35df30 ss 0x10 sys_semop+0x3d5: movzwl 0(%rax),%r15d ddb{0}> show proc PROC (syz-executor) tid=55580 pid=54030 tcnt=4 stat=onproc flags process=0 proc=4000000 runpri=84, usrpri=84, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80002a260040,0xffff80002a2602e8 process=0xffff8000fffe6b70 user=0xffff80002a359000, vmspace=0xfffffd800b063b70 estcpu=34, cpticks=0, pctcpu=0.0, user=0, sys=0, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 69702 410030 3590 0 2 0 syz-executor 69702 104236 3590 0 2 0x4000000 syz-executor 54030 162885 12772 0 2 0 syz-executor *54030 55580 12772 0 7 0x4000000 syz-executor 54030 402876 12772 0 3 0x4000080 fsleep syz-executor 54030 489046 12772 0 3 0x4000080 fsleep syz-executor 55062 363239 77761 0 2 0 syz-executor 55062 460997 77761 0 3 0x4000080 sbwait syz-executor 55062 428389 77761 0 3 0x4000080 sbufrcv syz-executor 55062 458432 77761 0 2 0x4000000 syz-executor 55062 229341 77761 0 3 0x4000000 sbufrcv syz-executor 55062 345261 77761 0 3 0x4000080 fsleep syz-executor 70050 4097 96669 0 2 0x2 syz-executor 52574 342656 87306 0 4 0x82004 syz-executor 52574 446565 87306 0 4 0x4082004 syz-executor 52574 383164 87306 0 2 0x4002004 syz-executor 52574 438429 87306 0 4 0x4082004 syz-executor 3590 93715 96669 0 3 0x82 nanoslp syz-executor 60713 274856 1 0 3 0x81000 vmmapbsy syz-executor 60713 157015 1 0 3 0x4081000 vmmapbsy syz-executor 60713 264548 1 0 3 0x4081000 fltagain2 syz-executor 60713 39697 1 0 3 0x4081000 fltagain2 syz-executor 60713 17264 1 0 3 0x4003000 suspend syz-executor 93236 109976 1 0 3 0x100083 ttyopn getty 81989 266710 0 0 3 0x14280 nfsidl nfsio 58707 486552 0 0 3 0x14280 nfsidl nfsio 88416 188729 0 0 3 0x14280 nfsidl nfsio 3954 53989 0 0 3 0x14280 nfsidl nfsio 63654 508103 0 0 3 0x14280 nfsidl nfsio 2632 32158 0 0 3 0x14280 nfsidl nfsio 96090 228296 0 0 3 0x14280 nfsidl nfsio 58801 165724 0 0 3 0x14280 nfsidl nfsio 834 114345 0 0 3 0x14280 nfsidl nfsio 77669 274872 0 0 3 0x14280 nfsidl nfsio 33045 126048 0 0 3 0x14280 nfsidl nfsio 33434 296535 0 0 3 0x14280 nfsidl nfsio 16573 120316 0 0 3 0x14280 nfsidl nfsio 77896 30459 0 0 3 0x14280 nfsidl nfsio 29428 406947 0 0 3 0x14280 nfsidl nfsio 82050 78110 0 0 3 0x14280 nfsidl nfsio 17101 460424 0 0 3 0x14280 nfsidl nfsio 19099 323373 0 0 3 0x14280 nfsidl nfsio 11477 58472 0 0 3 0x14280 nfsidl nfsio 16277 32558 0 0 3 0x14280 nfsidl nfsio 96252 104711 0 0 3 0x14200 acct acct 22731 403794 96669 0 3 0x82 piperd syz-executor 41062 377877 96669 0 2 0x2 syz-executor 77761 422645 96669 0 3 0x82 nanoslp syz-executor 12772 12614 96669 0 3 0x82 nanoslp syz-executor 87306 119242 96669 0 3 0x82 nanoslp syz-executor 96669 497145 77616 0 3 0x82 nanoslp syz-executor 77616 98183 77969 0 3 0x10008a sigsusp ksh 77969 229601 93346 0 3 0x98 kqread sshd-session 93346 58142 52425 0 3 0x92 kqread sshd-session 52425 285076 1 0 3 0x88 kqread sshd 10133 17140 91427 74 3 0x1100092 bpf pflogd 91427 23566 1 0 3 0x80 sbwait pflogd 65309 280687 65345 73 3 0x1100090 kqread syslogd 65345 383529 1 0 3 0x100082 sbwait syslogd 42633 265397 1 0 3 0x100080 kqread resolvd 78982 430852 88434 77 3 0x100092 kqread dhcpleased 66716 402800 88434 77 3 0x100092 kqread dhcpleased 88434 399300 1 0 3 0x80 kqread dhcpleased 66710 204416 0 0 3 0x14200 bored smr 36211 398297 0 0 2 0x14200 zerothread 25957 332449 0 0 3 0x14200 aiodoned aiodoned 53208 235075 0 0 3 0x14200 syncer update 12930 144975 0 0 3 0x14200 cleaner cleaner 12955 352536 0 0 3 0x14200 reaper reaper 32135 180638 0 0 3 0x14200 pgdaemon pagedaemon 81484 430707 0 0 3 0x14200 bored viomb 81439 423697 0 0 3 0x40014200 acpi0 acpi0 65828 391769 0 0 7 0x40014200 idle1 51192 391752 0 0 3 0x14200 bored softnet1 63563 225823 0 0 3 0x14200 bored softnet0 82855 404086 0 0 3 0x14200 bored systqmp 99326 477301 0 0 3 0x14200 bored systq 71995 435067 0 0 3 0x14200 tmoslp softclockmp 77719 390699 0 0 3 0x40014200 tmoslp softclock 49734 5818 0 0 3 0x40014200 idle0 1 194978 0 0 3 0x80082 wait init 0 0 -1 0 3 0x10010200 scheduler swapper ddb{0}> show all locks Process 54030 (syz-executor) thread 0xffff80002a260fd0 (55580) Process 55062 (syz-executor) thread 0xffff80002a260808 (460997) Process 70050 (syz-executor) thread 0xffff80003c43ed30 (4097) Process 60713 (syz-executor) thread 0xffff80002a261a30 (157015) Process 41062 (syz-executor) thread 0xffff8000fffefa08 (377877) ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 11097 12151K 12369K 166960K 14329 0 pcb 18 16K 24K 166960K 646 0 rtable 224 12K 13K 166960K 1197 0 pf 38 18K 82K 166960K 259 0 ifaddr 37 7K 8K 166960K 212 0 ifgroup 51 2K 2K 166960K 308 0 sysctl 4 1K 9K 166960K 23 0 counters 68 36K 37K 166960K 288 0 ioctlops 0 0K 5K 166960K 1960 0 iov 1 4K 28K 166960K 89 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1493 94K 94K 166960K 3296 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 9K 166960K 31 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 125 0 dirhash 12 2K 2K 166960K 36 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 15 53K 354K 166960K 2032 0 sigio 0 0K 0K 166960K 39 0 proc 74 115K 164K 166960K 1285 0 subproc 72 4K 5K 166960K 396 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 165 0 in_multi 74 5K 7K 166960K 394 0 ether_multi 1 0K 0K 166960K 7 0 mrt 1 0K 0K 166960K 9 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 1K 166960K 1161 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 0K 166960K 2 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 243 175K 186K 166960K 18580 0 UVM aobj 32 26K 26K 166960K 40 0 pinsyscall 40 80K 106K 166960K 3698 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 1K 166960K 138 0 NDP 13 0K 2K 166960K 155 0 temp 83 8688K 8776K 166960K 66861 0 kqueue 14 22K 30K 166960K 346 0 SYN cache 2 8K 16K 166960K 3 0 ddb{0}> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle plcache 128 26 0 0 1 0 1 1 0 8 0 rtpcb 120 316 0 313 3 2 1 3 0 8 0 rtentry 176 386 0 302 6 0 6 6 0 8 0 unpcb 144 876 0 857 5 4 1 3 0 8 0 syncache 336 11 0 11 6 6 0 1 0 8 0 tcpqe 32 18 0 18 3 3 0 1 0 8 0 tcpcb 736 878 0 873 22 21 1 10 0 8 0 arp 136 66 0 50 1 0 1 1 0 8 0 inpcb 328 2651 0 2641 44 42 2 15 0 8 0 nd6 152 95 0 75 1 0 1 1 0 8 0 pkpcb 40 12 0 12 5 5 0 1 0 8 0 kcovpl 48 44 0 36 1 0 1 1 0 8 0 mppekey 1024 2 0 2 1 1 0 1 0 8 0 ppxss 1192 71 0 71 7 6 1 1 0 8 1 pppxif 1504 7 0 7 5 5 0 1 0 8 0 pfstscr 40 6 0 5 2 1 1 1 0 8 0 pffrag 232 76 0 73 1 0 1 1 0 482 0 pffrnode 88 76 0 73 1 0 1 1 0 8 0 pffrent 40 151 0 148 1 0 1 1 0 8 0 pfosfp 40 1428 0 1005 5 0 5 5 0 8 0 pfosfpen 112 1428 0 714 21 0 21 21 0 8 0 pfrktable 1344 5 0 3 1 0 1 1 0 8 0 pfanchor 1288 1 0 0 1 0 1 1 0 8 0 pftag 88 6 0 0 1 0 1 1 0 8 0 pfstitem 24 6 0 0 1 0 1 1 0 8 0 pfstkey 128 12 0 6 1 0 1 1 0 8 0 pfstate 448 7 0 4 1 0 1 1 0 8 0 pfrule 1360 16 0 11 2 1 1 1 0 8 0 rttmr 136 2 0 2 2 2 0 1 0 8 0 art_heap8 4096 3 0 0 3 0 3 3 0 8 0 art_heap4 256 1650 0 1322 32 8 24 29 0 8 0 art_table 40 1653 0 1322 5 0 5 5 0 8 0 art_node 32 383 0 307 1 0 1 1 0 8 0 sysvmsgpl 40 21 0 8 2 1 1 1 0 8 0 semapl 112 120 0 111 1 0 1 1 0 8 0 shmpl 112 24 0 5 1 0 1 1 0 8 0 dirhash 1024 33 0 16 3 0 3 3 0 8 0 dino2pl 256 4640 0 3083 98 0 98 98 0 8 0 ffsino 296 4640 0 3083 121 1 120 120 0 8 0 nchpl 144 6947 0 5159 67 0 67 67 0 8 0 rtmask 32 13 0 13 5 5 0 1 0 8 0 vnodes 216 5920 0 0 329 0 329 329 0 8 0 namei 1024 27486 0 27485 6 5 1 4 0 8 0 percpumem 16 159 0 110 1 0 1 1 0 8 0 vcpupl 3968 10 0 0 2 0 2 2 0 8 0 vmpool 848 12 0 2 2 0 2 2 0 8 0 kstatmem 264 190 0 166 5 3 2 3 0 8 0 acpiwqpl 32 2 0 2 1 0 1 1 1 8 1 scsiplug 72 6 0 6 4 4 0 1 0 8 0 scxspl 216 35186 0 35186 12 11 1 8 1 8 1 plimitpl 152 813 0 796 1 0 1 1 0 8 0 sigapl 424 2263 0 2197 9 1 8 8 0 8 0 knotepl 120 565 0 0 18 0 18 18 0 8 0 kqueuepl 224 962 0 952 11 10 1 5 0 8 0 pipepl 344 455 0 426 7 3 4 6 0 8 0 fdescpl 528 2202 0 2173 3 0 3 3 0 8 0 filepl 160 15167 0 14945 38 27 11 21 0 8 0 lockfpl 104 750 0 748 2 1 1 2 0 8 0 lockfspl 48 237 0 235 1 0 1 1 0 8 0 sessionpl 144 64 0 55 1 0 1 1 0 8 0 pgrppl 48 160 0 143 1 0 1 1 0 8 0 ucredpl 104 2329 0 2316 1 0 1 1 0 8 0 zombiepl 144 2990 0 2990 2 1 1 1 0 8 1 processpl 1232 2263 0 2197 6 0 6 6 0 8 0 procpl 664 4946 0 4864 9 1 8 8 0 8 0 sosppl 176 10 0 10 3 3 0 1 0 8 0 sockpl 752 3929 0 3897 57 53 4 21 0 8 0 mcl64k 65536 9 0 0 2 0 2 2 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 mcl9k 9216 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 2 0 0 1 0 1 1 0 8 0 mcl4k 4096 112 0 0 14 0 14 14 0 8 0 mcl2k2 2112 1 0 0 1 0 1 1 0 8 0 mcl2k 2048 32 0 0 3 0 3 3 0 8 0 mtagpl 96 10 0 0 1 0 1 1 0 8 0 mbufpl 256 242 0 0 15 0 15 15 0 8 0 bufpl 280 13268 0 7132 439 0 439 439 0 8 0 anonpl 32 11781 0 0 95 0 95 95 0 246 0 amapchunkpl 152 61453 0 60886 73 48 25 33 0 158 2 amappl16 200 5773 0 5723 61 54 7 25 0 8 0 amappl15 192 3 0 3 1 1 0 1 0 8 0 amappl14 184 52 0 52 1 1 0 1 0 8 0 amappl13 176 706 0 705 1 0 1 1 0 8 0 amappl12 168 2723 0 2684 3 0 3 3 0 8 0 amappl11 160 27 0 27 1 1 0 1 0 8 0 amappl10 152 95 0 81 1 0 1 1 0 8 0 amappl9 144 252 0 252 1 1 0 1 0 8 0 amappl8 136 47 0 43 1 0 1 1 0 8 0 amappl7 128 176 0 175 1 0 1 1 0 8 0 amappl6 120 546 0 532 1 0 1 1 0 8 0 amappl5 112 106 0 95 1 0 1 1 0 8 0 amappl4 104 567 0 536 1 0 1 1 0 8 0 amappl3 96 10988 0 10899 3 0 3 3 0 8 0 amappl2 88 2292 0 2217 2 0 2 2 0 8 0 amappl1 80 20166 0 19579 16 1 15 15 0 8 0 amappl 88 17173 0 17015 5 0 5 5 0 92 0 uvmvnodes 80 158 0 0 4 0 4 4 0 8 0 dma4096 4096 1 0 1 1 1 0 1 0 8 0 dma2048 2048 1 0 1 1 1 0 1 0 8 0 dma1024 1024 2 0 1 1 0 1 1 0 8 0 dma256 256 7 0 7 2 2 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 8 0 8 2 2 0 1 0 8 0 dma16 16 18 0 17 1 0 1 1 0 8 0 aobjpl 72 39 0 8 1 0 1 1 0 8 0 uaddrrnd 24 2202 0 2173 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 2202 0 2173 1 0 1 1 0 8 0 vmmpekpl 168 19752 0 19704 4 1 3 3 0 8 0 vmmpepl 168 146859 0 145007 142 52 90 106 0 357 0 vmsppl 488 2201 0 2173 6 2 4 5 0 8 0 rwobjpl 80 40148 0 39002 36 6 30 31 0 8 0 pdppl 4096 4436 0 4360 166 85 81 86 0 8 5 pvpl 32 18760 0 0 151 0 151 151 0 265 0 pmappl 256 2213 0 2175 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 384 0 131 8 0 8 8 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace sys_semop(ffff80002a260fd0,ffff80002a35e100,ffff80002a35e050) at sys_semop+0x3d5 sys/kern/sysv_sem.c:619 syscall(ffff80002a35e100) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a35e100) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:775 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x80d3fd835d0, count: -3 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp ddb{1}> trace x86_ipi_db(ffff8000299ddff0) 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 acpicpu_idle() at acpicpu_idle+0x457 sys/dev/acpi/acpicpu_x86.c:1224 sched_idle(ffff8000299ddff0) at sched_idle+0x391 sys/kern/kern_sched.c:191 end trace frame: 0x0, count: -5