kernel: protection fault trap, code=0 Stopped at sys_semop+0x45b: 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(ffff80002a3854b8,ffff80002a318800,ffff80002a318750) at sys_semop+0x45b sys/kern/sysv_sem.c:615 syscall(ffff80002a318800) at syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a318800) at syscall+0xb08 sys/arch/amd64/amd64/trap.c:579 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x2d8b27fc7f0, count: -3 ddb{0}> show registers rdi 0 rsi 0 rbp 0xffff80002a318720 rbx 0 rdx 0 rcx 0xffff80002a3854b8 rax 0xdeadbeefdeadbeef r8 0x7f7fffffc000 r9 0 r10 0xc30414df4b6150c5 r11 0x8b30a927b8ffddbc r12 0xffff800001614804 r13 0 r14 0xffff80002a318800 r15 0 rip 0xffffffff825ca59b sys_semop+0x45b cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff80002a318600 ss 0x10 sys_semop+0x45b: movzwl 0(%rax),%r15d ddb{0}> show proc PROC (syz-executor) tid=465395 pid=72144 tcnt=4 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=0xffff80002a384f98,0xffff80002a378a80 process=0xffff8000fffe6f58 user=0xffff80002a313000, vmspace=0xfffffd806bd1e980 estcpu=31, cpticks=1, pctcpu=0.1, user=0, sys=2, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 93899 51044 70443 0 2 0 syz-executor 93899 145953 70443 0 3 0x4000080 fsleep syz-executor 72144 406623 96183 0 2 0 syz-executor 72144 399242 96183 0 3 0x4000000 vmmaplk syz-executor *72144 465395 96183 0 7 0x4000000 syz-executor 72144 126326 96183 0 3 0x4000080 fsleep syz-executor 40784 253070 90699 0 2 0 syz-executor 40784 310737 90699 0 3 0x4000080 fsleep syz-executor 58758 78998 88107 0 7 0 syz-executor 58758 399498 88107 0 2 0x4000001 syz-executor 15869 415812 30772 0 2 0x1 syz-executor 15869 341566 30772 0 3 0x4000080 kqread syz-executor 15869 372492 30772 0 3 0x4000080 fsleep syz-executor 15869 503654 30772 0 3 0x4000080 fsleep syz-executor 88107 283814 64170 0 2 0x3 syz-executor 79887 175699 64170 0 2 0x3 syz-executor 70173 364359 0 0 3 0x14280 nfsidl nfsio 65137 513061 0 0 3 0x14280 nfsidl nfsio 96020 91508 0 0 3 0x14280 nfsidl nfsio 69400 296535 0 0 3 0x14280 nfsidl nfsio 72276 102687 0 0 3 0x14280 nfsidl nfsio 96679 295548 0 0 3 0x14280 nfsidl nfsio 99074 81995 0 0 3 0x14280 nfsidl nfsio 17935 315593 0 0 3 0x14280 nfsidl nfsio 38195 370967 0 0 3 0x14280 nfsidl nfsio 89554 178400 0 0 3 0x14280 nfsidl nfsio 37011 166950 0 0 3 0x14280 nfsidl nfsio 97386 349406 0 0 3 0x14280 nfsidl nfsio 96087 468989 0 0 3 0x14280 nfsidl nfsio 52642 221810 0 0 3 0x14280 nfsidl nfsio 48226 202919 0 0 3 0x14280 nfsidl nfsio 85791 397210 0 0 3 0x14280 nfsidl nfsio 13260 88391 0 0 3 0x14280 nfsidl nfsio 81260 304146 0 0 3 0x14280 nfsidl nfsio 91579 113347 0 0 3 0x14280 nfsidl nfsio 3200 204407 0 0 3 0x14280 nfsidl nfsio 77480 371422 0 0 3 0x14200 bored sosplice 4624 417509 68678 0 3 0x100082 sbwait arp 68678 422239 53049 0 3 0x10008a sigsusp sh 14909 98805 10839 0 3 0x100082 sbwait ndp 10839 91731 74963 0 3 0x10008a sigsusp sh 96183 139069 64170 0 2 0x3 syz-executor 53049 435958 64170 0 3 0x82 wait syz-executor 74963 506776 64170 0 3 0x82 wait syz-executor 90699 61526 64170 0 2 0x3 syz-executor 70443 56162 64170 0 2 0x3 syz-executor 30772 22825 64170 0 2 0x3 syz-executor 64170 243262 74523 0 3 0x82 kqread syz-executor 74523 116551 94312 0 3 0x10008a sigsusp ksh 94312 327697 19844 0 3 0x98 kqread sshd-session 19844 394716 75727 0 3 0x92 kqread sshd-session 87184 189897 1 0 3 0x100083 ttyin getty 75727 507200 1 0 3 0x88 kqread sshd 66370 240422 20934 74 3 0x1100092 bpf pflogd 20934 320819 1 0 3 0x80 sbwait pflogd 75816 329290 82142 73 3 0x1100090 kqread syslogd 82142 25282 1 0 3 0x100082 sbwait syslogd 48381 121847 1 0 3 0x100080 kqread resolvd 18055 375201 57014 77 3 0x100092 kqread dhcpleased 18609 4340 57014 77 3 0x100092 kqread dhcpleased 57014 240238 1 0 3 0x80 kqread dhcpleased 55962 68271 0 0 3 0x14200 bored smr 59194 114671 0 0 2 0x14200 zerothread 7796 402731 0 0 3 0x14200 aiodoned aiodoned 86777 490142 0 0 3 0x14200 syncer update 39615 403222 0 0 3 0x14200 cleaner cleaner 49560 375576 0 0 3 0x14200 reaper reaper 13835 384820 0 0 3 0x14200 pgdaemon pagedaemon 33029 514349 0 0 3 0x14200 bored viomb 88163 173448 0 0 3 0x40014200 acpi0 acpi0 29890 192380 0 0 3 0x40014200 idle1 674 512801 0 0 3 0x14200 bored softnet3 80307 345073 0 0 3 0x14200 bored softnet2 9238 48183 0 0 3 0x14200 bored softnet1 21448 426164 0 0 2 0x14200 softnet0 66137 451384 0 0 3 0x14200 bored systqmp 52361 195689 0 0 3 0x14200 bored systq 99888 451364 0 0 3 0x14200 tmoslp softclockmp 22890 117247 0 0 3 0x40014200 tmoslp softclock 65760 56937 0 0 3 0x40014200 idle0 1 75354 0 0 3 0x82 wait init 0 0 -1 0 3 0x10010200 scheduler swapper ddb{0}> show all locks Process 72144 (syz-executor) thread 0xffff80002a384558 (406623) exclusive rwlock vmmaplk r = 0 (0xfffffd806bd1ea80) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1160 #1 rw_do_enter_write+0x3ea sys/kern/kern_rwlock.c:316 #2 vm_map_lock_ln+0x12e sys/uvm/uvm_map.c:5227 #3 uvm_map_protect+0xe1 sys/uvm/uvm_map.c:3034 #4 sys_mprotect+0x34c sys/uvm/uvm_mmap.c:590 #5 syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline] #5 syscall+0xbc6 sys/arch/amd64/amd64/trap.c:579 #6 Xsyscall+0x128 Process 72144 (syz-executor) thread 0xffff80002a3854b8 (465395) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff838ed148) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1160 #1 __mp_acquire_count+0x58 sys/kern/kern_lock.c:-1 #2 mi_switch+0x4b7 sys/kern/sched_bsd.c:441 #3 yield+0x6a sys/kern/sched_bsd.c:320 #4 malloc+0xe5 sys/kern/kern_malloc.c:174 #5 sys_semop+0x234 sys/kern/sysv_sem.c:564 #6 syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] #6 syscall+0xb08 sys/arch/amd64/amd64/trap.c:579 #7 Xsyscall+0x128 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10239 11103K 11819K 166960K 12446 0 pcb 19 13K 14K 166960K 197 0 rtable 179 6K 7K 166960K 487 0 pf 34 17K 81K 166960K 104 0 ifaddr 37 6K 7K 166960K 83 0 ifgroup 55 2K 2K 166960K 138 0 sysctl 4 1K 9K 166960K 9 0 counters 66 36K 37K 166960K 128 0 ioctlops 0 0K 4K 166960K 1553 0 iov 0 0K 16K 166960K 129 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1486 93K 94K 166960K 2145 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 13 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 1K 166960K 29 0 dirhash 12 2K 2K 166960K 30 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 19 69K 89K 166960K 811 0 sigio 0 0K 0K 166960K 15 0 proc 72 91K 127K 166960K 680 0 subproc 72 4K 4K 166960K 99 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 152 0 in_multi 73 5K 6K 166960K 145 0 ether_multi 1 0K 0K 166960K 4 0 mrt 0 0K 0K 166960K 1 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 229 1023K 1023K 166960K 229 0 exec 0 0K 1K 166960K 470 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 256 164K 178K 166960K 9385 0 UVM aobj 3 2K 2K 166960K 3 0 pinsyscall 46 92K 106K 166960K 2006 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 42 0 NDP 12 0K 1K 166960K 53 0 temp 80 8684K 8785K 166960K 40592 0 kqueue 14 22K 30K 166960K 138 0 SYN cache 2 16K 16K 166960K 2 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 92 0 86 1 0 1 1 0 8 0 rtentry 176 145 0 67 5 0 5 5 0 8 0 unpcb 144 715 0 697 6 4 2 4 0 8 1 syncache 336 4 0 4 2 2 0 1 0 8 0 tcpqe 32 1 0 1 1 1 0 1 0 8 0 tcpcb 808 192 0 184 4 2 2 4 0 8 1 arp 128 23 0 10 1 0 1 1 0 8 0 inpcb 384 899 0 886 15 8 7 11 0 8 5 nd6 144 31 0 12 1 0 1 1 0 8 0 pkpcb 40 11 0 11 1 1 0 1 0 8 0 kcovpl 48 11 0 3 1 0 1 1 0 8 0 ppxss 1192 16 0 16 1 0 1 1 0 8 1 pppxif 1504 6 0 6 2 2 0 1 0 8 0 pffrag 232 2 0 0 1 0 1 1 0 482 0 pffrnode 88 2 0 0 1 0 1 1 0 8 0 pffrent 40 5 0 3 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 pfstitem 24 62 0 23 1 0 1 1 0 8 0 pfstkey 128 62 0 23 2 0 2 2 0 8 0 pfstate 384 62 0 23 5 0 5 5 0 8 0 pfrule 1344 22 0 17 2 1 1 2 0 8 0 art_heap8 4096 3 0 0 3 0 3 3 0 8 0 art_heap4 256 576 0 248 29 5 24 26 0 8 2 art_table 32 579 0 248 4 0 4 4 0 8 0 art_node 16 141 0 73 1 0 1 1 0 8 0 sysvmsgpl 40 5 0 2 1 0 1 1 0 8 0 semupl 112 1 0 1 1 1 0 1 0 8 0 semapl 112 24 0 15 1 0 1 1 0 8 0 dirhash 1024 29 0 12 3 0 3 3 0 8 0 dino2pl 256 2789 0 1288 95 0 95 95 0 8 0 ffsino 288 2789 0 1288 109 0 109 109 0 8 0 nchpl 144 3900 0 3363 64 31 33 64 0 8 8 uvmvnodes 80 3402 0 0 70 0 70 70 0 8 0 vnodes 216 3402 0 0 189 0 189 189 0 8 0 namei 1024 13505 0 13505 3 2 1 2 0 8 1 percpumem 16 79 0 31 1 0 1 1 0 8 0 kstatmem 264 70 0 42 3 0 3 3 0 8 0 scsiplug 72 2 0 2 1 0 1 1 0 8 1 scxspl 216 12537 0 12537 11 9 2 8 1 8 2 plimitpl 152 257 0 240 1 0 1 1 0 8 0 sigapl 424 1140 0 1068 9 0 9 9 0 8 0 knotepl 120 571 0 0 18 0 18 18 0 8 0 kqueuepl 224 308 0 232 5 0 5 5 0 8 0 pipepl 336 174 0 147 3 0 3 3 0 8 0 fdescpl 520 1099 0 1066 3 0 3 3 0 8 0 filepl 160 6240 0 5951 19 6 13 14 0 8 0 lockfpl 104 173 0 171 1 0 1 1 0 8 0 lockfspl 48 74 0 72 1 0 1 1 0 8 0 sessionpl 144 26 0 17 1 0 1 1 0 8 0 pgrppl 48 44 0 27 1 0 1 1 0 8 0 ucredpl 104 820 0 807 1 0 1 1 0 8 0 zombiepl 144 1543 0 1543 2 1 1 1 0 8 1 processpl 1208 1140 0 1068 6 0 6 6 0 8 0 procpl 656 2409 0 2328 8 0 8 8 0 8 0 srpgc 96 8 0 8 2 2 0 1 0 8 0 sosppl 168 4 0 4 2 1 1 1 0 8 1 sockpl 728 1733 0 1695 19 10 9 13 0 8 5 mcl64k 65536 4 0 0 1 0 1 1 0 8 0 mcl16k 16384 2 0 0 1 0 1 1 0 8 0 mcl8k 8192 3 0 0 1 0 1 1 0 8 0 mcl4k 4096 111 0 0 14 0 14 14 0 8 0 mcl2k 2048 36 0 0 4 0 4 4 0 8 0 mtagpl 96 75 0 0 2 0 2 2 0 8 0 mbufpl 256 1159 0 0 72 0 72 72 0 8 0 bufpl 280 3739 0 120 259 0 259 259 0 8 0 anonpl 32 9373 0 0 76 0 76 76 0 246 0 amapchunkpl 152 30321 0 29759 40 9 31 31 0 158 6 amappl16 200 3594 0 3533 19 7 12 15 0 8 6 amappl15 192 18 0 18 3 3 0 1 0 8 0 amappl14 184 119 0 105 1 0 1 1 0 8 0 amappl13 176 4 0 4 1 1 0 1 0 8 0 amappl12 168 1853 0 1818 3 1 2 2 0 8 0 amappl11 160 50 0 36 1 0 1 1 0 8 0 amappl10 152 61 0 61 1 1 0 1 0 8 0 amappl9 144 264 0 263 1 0 1 1 0 8 0 amappl8 136 25 0 22 1 0 1 1 0 8 0 amappl7 128 113 0 99 1 0 1 1 0 8 0 amappl6 120 210 0 204 1 0 1 1 0 8 0 amappl5 112 136 0 126 1 0 1 1 0 8 0 amappl4 104 338 0 316 1 0 1 1 0 8 0 amappl3 96 5874 0 5760 4 0 4 4 0 8 0 amappl2 88 693 0 623 2 0 2 2 0 8 0 amappl1 80 11380 0 10735 16 0 16 16 0 8 0 amappl 88 8539 0 8368 5 0 5 5 0 92 0 dma32768 32768 1 0 1 1 1 0 1 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 8 0 8 2 2 0 1 0 8 0 dma16 16 18 0 17 1 0 1 1 0 8 0 aobjpl 72 2 0 0 1 0 1 1 0 8 0 uaddrrnd 24 1099 0 1066 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1099 0 1066 1 0 1 1 0 8 0 vmmpekpl 168 10285 0 10229 3 0 3 3 0 8 0 vmmpepl 168 75200 0 73099 104 3 101 103 0 357 5 vmsppl 480 1098 0 1066 5 0 5 5 0 8 0 rwobjpl 72 25499 0 21041 82 0 82 82 0 8 0 pdppl 4096 2206 0 2132 114 38 76 84 0 8 2 pvpl 32 17572 0 0 142 0 142 142 0 265 0 pmappl 256 1098 0 1066 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 465 0 52 13 0 13 13 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace sys_semop(ffff80002a3854b8,ffff80002a318800,ffff80002a318750) at sys_semop+0x45b sys/kern/sysv_sem.c:615 syscall(ffff80002a318800) at syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a318800) at syscall+0xb08 sys/arch/amd64/amd64/trap.c:579 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x2d8b27fc7f0, 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 end of kernel end trace frame: 0x76967df43c80, count: -3