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(ffff80002a786008,ffff80002a8fb800,ffff80002a8fb750) at sys_semop+0x3d5 sys/kern/sysv_sem.c:617 syscall(ffff80002a8fb800) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80002a8fb800) at syscall+0x962 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xf28807e6330, count: -3 ddb> show registers rdi 0 rsi 0 rbp 0xffff80002a8fb730 rbx 0xdeafbeaddeafbead rdx 0 rcx 0 rax 0xdeafbeaddeafbead r8 0x7f7fffffc000 r9 0 r10 0x133f63b51bc63fa7 r11 0x8f155552b534fff2 r12 0 r13 0xfffffd80625b5ee0 r14 0xffff80002a8fb800 r15 0 rip 0xffffffff817d8175 sys_semop+0x3d5 cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff80002a8fb640 ss 0x10 sys_semop+0x3d5: movzwl 0(%rax),%r15d ddb> show proc PROC (syz-executor) tid=209667 pid=40440 tcnt=3 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=0xffff80002a822d28,0xffff80002a7aafb8 process=0xffff80002a981fa0 user=0xffff80002a8f6000, vmspace=0xfffffd806b8b2748 estcpu=34, cpticks=0, pctcpu=0.0, user=0, sys=0, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 5278 309132 91473 0 2 0 syz-executor 5278 259540 91473 0 3 0x4000080 fsleep syz-executor 40440 456113 28529 0 2 0 syz-executor *40440 209667 28529 0 7 0x4000000 syz-executor 40440 76627 28529 0 3 0x4000080 fsleep syz-executor 91473 178607 29640 0 3 0x82 nanoslp syz-executor 29088 103731 29640 0 2 0x2 syz-executor 44004 522617 1 0 3 0x100083 ttyin getty 53702 408040 0 0 3 0x14280 nfsidl nfsio 41276 155770 0 0 3 0x14280 nfsidl nfsio 75964 320747 0 0 3 0x14280 nfsidl nfsio 54144 388197 0 0 3 0x14280 nfsidl nfsio 23440 445291 0 0 3 0x14280 nfsidl nfsio 56160 268771 0 0 3 0x14280 nfsidl nfsio 66718 15897 0 0 3 0x14280 nfsidl nfsio 35431 416172 0 0 3 0x14280 nfsidl nfsio 85571 299752 0 0 3 0x14280 nfsidl nfsio 59060 489411 0 0 3 0x14280 nfsidl nfsio 80048 75431 0 0 3 0x14280 nfsidl nfsio 49849 104424 0 0 3 0x14280 nfsidl nfsio 165 54612 0 0 3 0x14280 nfsidl nfsio 61883 6529 0 0 3 0x14280 nfsidl nfsio 35488 415089 0 0 3 0x14280 nfsidl nfsio 51407 391393 0 0 3 0x14280 nfsidl nfsio 39026 330610 0 0 3 0x14280 nfsidl nfsio 36070 515187 0 0 3 0x14280 nfsidl nfsio 6074 38712 0 0 3 0x14280 nfsidl nfsio 45853 118562 0 0 3 0x14280 nfsidl nfsio 55500 170280 29640 0 2 0x3 syz-executor 75704 191188 0 0 3 0x14200 bored sosplice 42542 30666 29640 0 2 0x2 syz-executor 8760 240871 29640 0 2 0x2 syz-executor 28529 316432 29640 0 3 0x82 nanoslp syz-executor 34170 136656 29640 0 2 0x2 syz-executor 5373 203149 29640 0 2 0x2 syz-executor 29640 51935 84815 0 3 0x82 kqread syz-executor 84815 49209 19887 0 3 0x10008a sigsusp ksh 19887 475725 84727 0 3 0x98 kqread sshd-session 84727 30798 22852 0 3 0x92 kqread sshd-session 22852 189224 1 0 3 0x88 kqread sshd 69134 265274 56797 73 3 0x1100090 kqread syslogd 56797 200736 1 0 3 0x100082 sbwait syslogd 98936 306323 1 0 3 0x100080 kqread resolvd 38982 383423 42952 77 3 0x100092 kqread dhcpleased 81452 298048 42952 77 3 0x100092 kqread dhcpleased 42952 134384 1 0 3 0x80 kqread dhcpleased 22906 112818 0 0 3 0x14200 bored smr 70586 436499 0 0 2 0x14200 zerothread 65344 6009 0 0 3 0x14200 aiodoned aiodoned 74064 470135 0 0 3 0x14200 syncer update 2789 124773 0 0 3 0x14200 cleaner cleaner 13595 225082 0 0 3 0x14200 reaper reaper 63546 520811 0 0 3 0x14200 pgdaemon pagedaemon 84631 499996 0 0 3 0x14200 bored viomb 97771 372037 0 0 3 0x40014200 acpi0 acpi0 95725 42519 0 0 3 0x14200 bored softnet0 66801 487993 0 0 3 0x14200 bored systqmp 64416 505415 0 0 3 0x14200 bored systq 64273 389836 0 0 3 0x40014200 tmoslp softclock 4970 286806 0 0 3 0x40014200 idle0 1 278196 0 0 3 0x82 wait init 0 0 -1 0 3 0x10010200 scheduler swapper ddb> show all locks No such command ddb> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10213 11056K 11601K 166960K 12451 0 pcb 17 15K 17K 166960K 666 0 rtable 186 17K 17K 166960K 603 0 pf 35 13K 17K 166960K 153 0 ifaddr 36 6K 7K 166960K 150 0 ifgroup 58 2K 2K 166960K 180 0 sysctl 4 1K 9K 166960K 18 0 counters 34 18K 18K 166960K 173 0 ioctlops 0 0K 4K 166960K 467 0 iov 0 0K 18K 166960K 152 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1393 88K 89K 166960K 2474 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 19 0 VM map 2 1K 1K 166960K 2 0 sem 11 0K 1K 166960K 90 0 dirhash 12 2K 2K 166960K 45 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 15 53K 110K 166960K 1493 0 sigio 0 0K 0K 166960K 23 0 proc 60 59K 91K 166960K 739 0 subproc 72 4K 4K 166960K 101 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 150 0 in_multi 66 4K 7K 166960K 189 0 ether_multi 1 0K 0K 166960K 10 0 mrt 1 0K 0K 166960K 19 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 235 1049K 1049K 166960K 235 0 exec 0 0K 1K 166960K 624 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 0K 166960K 6 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 183 150K 171K 166960K 15042 0 UVM aobj 54 2K 2K 166960K 62 0 pinsyscall 37 74K 90K 166960K 2593 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 71 0 NDP 13 0K 2K 166960K 81 0 temp 80 8648K 8716K 166960K 54196 0 kqueue 13 20K 34K 166960K 296 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 120 132 0 129 1 0 1 1 0 8 0 rtentry 136 202 0 141 4 0 4 4 0 8 0 unpcb 144 1171 0 1154 9 3 6 6 0 8 5 syncache 336 5 0 5 3 2 1 1 0 8 1 tcpcb 736 469 0 464 7 3 4 4 0 8 3 arp 96 17 0 8 1 0 1 1 0 8 0 ipq 40 4 0 4 1 0 1 1 0 8 1 ipqe 40 6 0 6 1 0 1 1 0 8 1 inpcb 328 1810 0 1802 16 9 7 9 0 8 6 ip6q 72 3 0 1 1 0 1 1 0 8 0 ip6af 40 3 0 2 1 0 1 1 0 8 0 nd6 112 33 0 21 1 0 1 1 0 8 0 pkpcb 40 10 0 10 2 1 1 1 0 8 1 kcovpl 48 11 0 3 1 0 1 1 0 8 0 mppekey 1024 1 0 1 1 0 1 1 0 8 1 ppxss 1072 129 0 129 2 1 1 1 0 8 1 pppxif 1384 1 0 1 1 0 1 1 0 8 1 pfstscr 40 1 0 0 1 0 1 1 0 8 0 pftag 88 2 0 0 1 0 1 1 0 8 0 pfstitem 24 2 0 0 1 0 1 1 0 8 0 pfstkey 128 2 0 0 1 0 1 1 0 8 0 pfstate 384 1 0 0 1 0 1 1 0 8 0 pfrule 1344 4 0 4 1 1 0 1 0 8 0 rttmr 136 6 0 6 2 1 1 1 0 8 1 art_heap8 4096 5 0 0 5 0 5 5 0 8 0 art_heap4 256 962 0 699 30 6 24 30 0 8 7 art_table 40 967 0 699 5 0 5 5 0 8 0 art_node 32 198 0 145 1 0 1 1 0 8 0 sysvmsgpl 40 11 0 6 1 0 1 1 0 8 0 semupl 112 2 0 2 2 1 1 1 0 8 1 semapl 112 85 0 77 1 0 1 1 0 8 0 shmpl 112 59 0 8 2 0 2 2 0 8 0 dirhash 1024 39 0 22 3 0 3 3 0 8 0 dino2pl 256 4278 0 2787 95 0 95 95 0 8 0 ffsino 256 4279 0 2787 95 0 95 95 0 8 0 nchpl 144 6333 0 4645 63 0 63 63 0 8 0 rtmask 32 19 0 19 2 1 1 1 0 8 1 vnodes 216 4786 0 0 266 0 266 266 0 8 0 namei 1024 22531 0 22530 4 2 2 2 0 8 1 kstatmem 264 118 0 92 3 1 2 3 0 8 0 scsiplug 72 6 0 6 2 1 1 1 0 8 1 scxspl 216 22207 0 22207 11 8 3 8 1 8 3 plimitpl 152 467 0 451 1 0 1 1 0 8 0 sigapl 424 1774 0 1713 8 0 8 8 0 8 0 knotepl 120 62359 0 62312 48 37 11 18 0 8 8 kqueuepl 184 567 0 558 5 1 4 4 0 8 3 pipepl 304 442 0 415 10 5 5 8 0 8 2 fdescpl 448 1738 0 1710 4 0 4 4 0 8 0 filepl 120 12029 0 11823 19 8 11 13 0 8 2 lockfpl 104 666 0 664 2 1 1 2 0 8 0 lockfspl 48 275 0 273 1 0 1 1 0 8 0 sessionpl 144 27 0 19 1 0 1 1 0 8 0 pgrppl 48 66 0 50 1 0 1 1 0 8 0 ucredpl 104 2041 0 2030 1 0 1 1 0 8 0 zombiepl 144 2313 0 2313 2 1 1 1 0 8 1 processpl 1152 1775 0 1713 5 0 5 5 0 8 0 procpl 664 4005 0 3940 7 0 7 7 0 8 0 sosppl 168 12 0 12 2 1 1 1 0 8 1 sockpl 552 3203 0 3175 21 11 10 12 0 8 8 mcl64k 65536 263 0 263 3 2 1 1 0 8 1 mcl16k 16384 10 0 10 2 1 1 1 0 8 1 mcl12k 12288 2 0 2 1 0 1 1 0 8 1 mcl9k 9216 6 0 6 2 1 1 1 0 8 1 mcl8k 8192 22 0 22 1 0 1 1 0 8 1 mcl4k 4096 4330 0 4279 14 6 8 13 0 8 0 mcl2k2 2112 1 0 1 1 1 0 1 0 8 0 mcl2k 2048 2192 0 2188 8 5 3 5 0 8 2 mtagpl 96 6 0 6 2 1 1 1 0 8 1 mbufpl 256 18924 0 18810 28 15 13 28 0 8 4 bufpl 280 8179 0 1951 446 0 446 446 0 8 0 anonpl 24 241190 0 238384 68 22 46 47 0 187 19 amapchunkpl 152 50965 0 50630 44 16 28 32 0 158 9 amappl16 200 4350 0 4322 39 26 13 16 0 8 8 amappl15 192 37 0 37 1 1 0 1 0 8 0 amappl14 184 112 0 102 1 0 1 1 0 8 0 amappl13 176 5 0 5 1 1 0 1 0 8 0 amappl12 168 2390 0 2366 2 0 2 2 0 8 0 amappl11 160 69 0 59 1 0 1 1 0 8 0 amappl10 152 29 0 29 1 1 0 1 0 8 0 amappl9 144 256 0 256 1 1 0 1 0 8 0 amappl8 136 18 0 17 1 0 1 1 0 8 0 amappl7 128 122 0 112 1 0 1 1 0 8 0 amappl6 120 209 0 206 1 0 1 1 0 8 0 amappl5 112 124 0 117 1 0 1 1 0 8 0 amappl4 104 278 0 262 1 0 1 1 0 8 0 amappl3 96 9024 0 8958 3 0 3 3 0 8 0 amappl2 88 1990 0 1921 2 0 2 2 0 8 0 amappl1 80 13662 0 13141 13 0 13 13 0 8 1 amappl 88 14125 0 14005 5 0 5 5 0 92 0 uvmvnodes 80 4786 0 0 98 0 98 98 0 8 0 dma16384 16384 2 0 2 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 128 253 0 253 1 1 0 1 0 8 0 dma64 64 7 0 7 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 61 0 8 1 0 1 1 0 8 0 uaddrrnd 24 1737 0 1710 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1737 0 1710 1 0 1 1 0 8 0 vmmpekpl 168 15516 0 15462 3 0 3 3 0 8 0 vmmpepl 168 111227 0 109566 111 17 94 95 0 357 9 vmsppl 368 1736 0 1710 4 1 3 4 0 8 0 rwobjpl 40 33913 0 28280 58 0 58 58 0 8 0 pdppl 4096 3481 0 3420 107 40 67 77 0 8 6 pvpl 32 724052 0 716766 159 36 123 123 0 265 31 pmappl 216 1736 0 1710 2 0 2 2 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 418 0 85 11 0 11 11 0 8 0 ddb> machine ddbcpu 0 No such command ddb> trace sys_semop(ffff80002a786008,ffff80002a8fb800,ffff80002a8fb750) at sys_semop+0x3d5 sys/kern/sysv_sem.c:617 syscall(ffff80002a8fb800) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80002a8fb800) at syscall+0x962 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xf28807e6330, count: -3 ddb> machine ddbcpu 1 No such command ddb> trace sys_semop(ffff80002a786008,ffff80002a8fb800,ffff80002a8fb750) at sys_semop+0x3d5 sys/kern/sysv_sem.c:617 syscall(ffff80002a8fb800) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80002a8fb800) at syscall+0x962 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xf28807e6330, count: -3