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(ffff80002a669560,ffff8000377ed980,ffff8000377ed8d0) at sys_semop+0x2f7 sys/kern/sysv_sem.c:615 syscall(ffff8000377ed980) at syscall+0x751 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xc38a209990, count: -3 ddb> show registers rdi 0 rsi 0 rbp 0xffff8000377ed8a0 rbx 0 rdx 0 rcx 0 rax 0xffff80002a669560 r8 0x7f7fffffc000 r9 0xfffffd807f7d77b8 r10 0x70f727e2e3f987f5 r11 0x4565408cf6f89dca r12 0 r13 0xdeafbeaddeafbead r14 0xffff8000377ed980 r15 0xfffffd8073955930 rip 0xffffffff81aa4ae7 sys_semop+0x2f7 cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff8000377ed7a0 ss 0x10 sys_semop+0x2f7: movzwl 0(%r13),%ebx ddb> show proc PROC (syz-executor.3) tid=309500 pid=88563 tcnt=4 stat=onproc flags process=0 proc=4000000 runpri=4, usrpri=70, slppri=4, nice=20 wchan=0x0, wmesg=, ps_single=0x0 forw=0xffffffffffffffff, list=0xffff80002a61bd50,0xffff80002a669ac0 process=0xffff8000329665c8 user=0xffff8000377e8000, vmspace=0xfffffd80698e3010 estcpu=36, cpticks=1, pctcpu=0.0, user=0, sys=0, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 67824 517887 69917 0 3 0x80 nanoslp syz-executor.1 67824 10402 69917 0 3 0x4000080 fsleep syz-executor.1 16614 262963 31221 0 2 0 syz-executor.4 16614 429835 31221 0 3 0x4000080 fsleep syz-executor.4 16614 284648 31221 0 2 0x4000000 syz-executor.4 88563 258410 94952 0 3 0x80 nanoslp syz-executor.3 *88563 309500 94952 0 7 0x4000000 syz-executor.3 88563 129393 94952 0 3 0x4000080 fsleep syz-executor.3 88563 127656 94952 0 3 0x4000080 fsleep syz-executor.3 16875 512448 10764 0 2 0 syz-executor.6 16875 330400 10764 0 3 0x4000080 fsleep syz-executor.6 3506 517908 29619 0 2 0 syz-executor.0 3506 393741 29619 0 3 0x4000080 fsleep syz-executor.0 3506 445972 29619 0 3 0x4000080 fsleep syz-executor.0 86924 412847 23962 0 2 0 syz-executor.5 86924 483852 23962 0 3 0x4000080 fsleep syz-executor.5 51805 276345 29244 0 2 0x10 syz-executor.7 51805 259699 29244 0 2 0x4000010 syz-executor.7 51805 442536 29244 0 2 0x4000010 syz-executor.7 51805 181700 29244 0 2 0x4000010 syz-executor.7 31221 331579 13116 0 3 0x82 nanoslp syz-executor.4 10764 180039 13116 0 3 0x82 nanoslp syz-executor.6 23962 251250 13116 0 3 0x82 nanoslp syz-executor.5 29244 305553 13116 0 3 0x82 nanoslp syz-executor.7 94952 56672 13116 0 2 0x482 syz-executor.3 29403 387195 13116 0 3 0x82 nanoslp syz-executor.2 69917 353214 13116 0 2 0x482 syz-executor.1 29619 328552 13116 0 3 0x82 nanoslp syz-executor.0 13116 491994 72507 0 3 0x2000082 wait syz-fuzzer 13116 99962 72507 0 3 0x6000082 nanoslp syz-fuzzer 13116 239942 72507 0 3 0x6000082 wait syz-fuzzer 13116 490231 72507 0 3 0x6000082 wait syz-fuzzer 13116 326270 72507 0 3 0x6000082 thrsleep syz-fuzzer 13116 310164 72507 0 3 0x6000082 thrsleep syz-fuzzer 13116 345806 72507 0 3 0x6000082 wait syz-fuzzer 13116 315932 72507 0 3 0x6000082 wait syz-fuzzer 13116 254734 72507 0 3 0x6000082 wait syz-fuzzer 13116 332523 72507 0 3 0x6000082 thrsleep syz-fuzzer 13116 39707 72507 0 3 0x6000082 wait syz-fuzzer 13116 44531 72507 0 3 0x6000082 wait syz-fuzzer 13116 103670 72507 0 3 0x6000082 thrsleep syz-fuzzer 13116 188085 72507 0 3 0x6000082 kqread syz-fuzzer 72507 196017 81795 0 3 0x10008a sigsusp ksh 81795 425338 74434 0 3 0x9a kqread sshd 60888 418499 1 0 3 0x100083 ttyin getty 74434 142791 1 0 3 0x88 kqread sshd 76785 462463 8939 73 3 0x1100090 kqread syslogd 8939 419092 1 0 3 0x100082 netio syslogd 56783 400180 1 0 3 0x100080 kqread resolvd 36954 177180 97253 77 3 0x100092 kqread dhcpleased 58663 213202 97253 77 3 0x100092 kqread dhcpleased 97253 147489 1 0 3 0x80 kqread dhcpleased 59228 522623 0 0 3 0x14200 bored smr 78329 118803 0 0 2 0x14200 zerothread 26196 432512 0 0 3 0x14200 aiodoned aiodoned 46325 218683 0 0 3 0x14200 syncer update 62207 78488 0 0 3 0x14200 cleaner cleaner 61122 277632 0 0 3 0x14200 reaper reaper 36714 127995 0 0 3 0x14200 pgdaemon pagedaemon 94535 209365 0 0 3 0x14200 bored viomb 14728 498630 0 0 3 0x40014200 acpi0 acpi0 23367 297641 0 0 3 0x14200 bored softnet3 4349 62060 0 0 3 0x14200 bored softnet2 21510 110385 0 0 3 0x14200 bored softnet1 72648 34743 0 0 3 0x14200 bored softnet0 7166 392845 0 0 3 0x14200 bored systqmp 53313 17534 0 0 3 0x14200 bored systq 92078 399524 0 0 3 0x40014200 tmoslp softclock 94610 244026 0 0 3 0x40014200 idle0 1 139652 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 10165 6401K 6667K 166960K 11371 0 pcb 15 12K 13K 166960K 32 0 rtable 234 6K 6K 166960K 350 0 pf 29 8K 8K 166960K 29 0 ifaddr 43 11K 11K 166960K 45 0 ifgroup 50 2K 2K 166960K 50 0 counters 30 17K 17K 166960K 30 0 ioctlops 0 0K 2K 166960K 32 0 iov 0 0K 12K 166960K 7 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1285 80K 80K 166960K 1348 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 4 0 VM map 2 1K 1K 166960K 2 0 sem 9 0K 1K 166960K 78 0 dirhash 12 2K 2K 166960K 12 0 ACPI 1697 195K 286K 166960K 12548 0 file desc 17 61K 69K 166960K 261 0 proc 59 67K 91K 166960K 477 0 subproc 104 6K 6K 166960K 104 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 3 0 in_multi 99 7K 7K 166960K 99 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 49 228K 228K 166960K 49 0 exec 0 0K 1K 166960K 574 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 335 84K 85K 166960K 4434 0 UVM aobj 12 2K 2K 166960K 12 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 NDP 11 0K 2K 166960K 27 0 temp 73 6760K 6824K 166960K 6304 0 kqueue 12 18K 24K 166960K 38 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 40 0 37 1 0 1 1 0 8 0 rtentry 112 111 0 1 4 0 4 4 0 8 0 unpcb 144 194 0 177 6 0 6 6 0 8 5 syncache 336 4 0 4 1 0 1 1 0 8 1 tcpqe 32 414 0 414 2 0 2 2 0 8 2 tcpcb 808 131 0 126 8 0 8 8 0 8 7 arp 88 18 0 0 1 0 1 1 0 8 0 inpcb 360 265 0 257 8 0 8 8 0 8 7 nd6 104 24 0 0 1 0 1 1 0 8 0 kcovpl 48 8 0 0 1 0 1 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 453 0 0 29 0 29 29 0 8 0 art_table 32 454 0 0 4 0 4 4 0 8 0 art_node 16 110 0 10 1 0 1 1 0 8 0 semapl 112 9 0 3 1 0 1 1 0 8 0 shmpl 112 9 0 0 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 1677 0 231 91 0 91 91 0 8 0 ffsino 240 1677 0 231 86 0 86 86 0 8 0 nchpl 144 2146 0 460 63 0 63 63 0 8 0 uvmvnodes 80 1815 0 0 38 0 38 38 0 8 0 vnodes 216 1815 0 0 101 0 101 101 0 8 0 namei 1024 7713 0 7713 3 0 3 3 0 8 3 kstatmem 264 22 0 0 2 0 2 2 0 8 0 scxspl 216 8238 0 8238 8 0 8 8 1 8 8 plimitpl 152 40 0 25 1 0 1 1 0 8 0 sigapl 424 559 0 514 6 0 6 6 0 8 0 futexpl 64 1840 0 1832 1 0 1 1 0 8 0 knotepl 120 5667 0 5585 3 0 3 3 0 8 0 kqueuepl 184 43 0 35 1 0 1 1 0 8 0 pipepl 288 149 0 121 3 0 3 3 0 8 1 fdescpl 432 543 0 515 4 0 4 4 0 8 0 filepl 120 2876 0 2569 12 0 12 12 0 8 2 lockfpl 104 37 0 35 1 0 1 1 0 8 0 lockfspl 48 16 0 14 1 0 1 1 0 8 0 sessionpl 144 23 0 7 1 0 1 1 0 8 0 pgrppl 48 23 0 7 1 0 1 1 0 8 0 ucredpl 104 324 0 313 1 0 1 1 0 8 0 zombiepl 144 515 0 514 1 0 1 1 0 8 0 processpl 1072 559 0 514 4 0 4 4 0 8 0 procpl 680 800 0 729 6 0 6 6 0 8 0 sockpl 488 499 0 471 21 1 20 20 0 8 16 mcl64k 65536 10 0 10 1 0 1 1 0 8 1 mcl16k 16384 11 0 11 1 0 1 1 0 8 1 mcl12k 12288 9 0 9 1 0 1 1 0 8 1 mcl9k 9216 3 0 3 1 0 1 1 0 8 1 mcl8k 8192 23 0 23 1 0 1 1 0 8 1 mcl4k 4096 30 0 30 1 0 1 1 0 8 1 mcl2k 2048 67981 0 67901 42 28 14 29 0 8 3 mtagpl 96 48 0 4 2 0 2 2 0 8 0 mbufpl 256 108397 0 108222 20 6 14 15 0 8 1 bufpl 280 4599 0 141 319 0 319 319 0 8 0 anonpl 24 208919 0 196062 79 0 79 79 0 188 0 amapchunkpl 152 14912 0 14025 36 0 36 36 0 158 1 amappl16 200 5808 0 5436 21 0 21 21 0 8 1 amappl15 192 9 0 9 1 0 1 1 0 8 1 amappl14 184 145 0 133 2 0 2 2 0 8 1 amappl13 176 9 0 9 1 0 1 1 0 8 1 amappl12 168 1174 0 1142 2 0 2 2 0 8 0 amappl11 160 58 0 47 1 0 1 1 0 8 0 amappl10 152 29 0 21 1 0 1 1 0 8 0 amappl9 144 160 0 158 1 0 1 1 0 8 0 amappl8 136 175 0 129 2 0 2 2 0 8 0 amappl7 128 160 0 142 2 0 2 2 0 8 0 amappl6 120 260 0 252 1 0 1 1 0 8 0 amappl5 112 124 0 116 1 0 1 1 0 8 0 amappl4 104 398 0 377 2 0 2 2 0 8 1 amappl3 96 3456 0 3361 3 0 3 3 0 8 0 amappl2 88 984 0 913 3 0 3 3 0 8 1 amappl1 80 10087 0 9573 22 2 20 22 0 8 8 amappl 88 3935 0 3700 6 0 6 6 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 11 0 0 1 0 1 1 0 8 0 uaddrrnd 24 543 0 515 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 543 0 515 1 0 1 1 0 8 0 vmmpekpl 168 10092 0 10045 3 0 3 3 0 8 0 vmmpepl 168 56721 0 54527 123 0 123 123 0 357 27 vmsppl 352 542 0 515 3 0 3 3 0 8 0 rwobjpl 24 23113 0 19907 20 0 20 20 0 8 0 pdppl 4096 1092 0 1030 98 34 64 66 0 8 2 pvpl 32 439164 0 420761 362 17 345 362 0 265 195 pmappl 216 542 0 515 2 0 2 2 0 8 0 extentpl 40 56 0 38 1 0 1 1 0 8 0 phpool 112 398 0 68 10 0 10 10 0 8 0 ddb> machine ddbcpu 0 No such command ddb> trace sys_semop(ffff80002a669560,ffff8000377ed980,ffff8000377ed8d0) at sys_semop+0x2f7 sys/kern/sysv_sem.c:615 syscall(ffff8000377ed980) at syscall+0x751 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xc38a209990, count: -3 ddb> machine ddbcpu 1 No such command ddb> trace sys_semop(ffff80002a669560,ffff8000377ed980,ffff8000377ed8d0) at sys_semop+0x2f7 sys/kern/sysv_sem.c:615 syscall(ffff8000377ed980) at syscall+0x751 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xc38a209990, count: -3