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(ffff80002f3a8fb0,ffff800033bbc710,ffff800033bbc660) at sys_semop+0x3d5 sys/kern/sysv_sem.c:619 syscall(ffff800033bbc710) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff800033bbc710) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x365f97efeb0, count: -3 ddb{0}> show registers rdi 0 rsi 0 rbp 0xffff800033bbc630 rbx 0xdeafbeaddeafbead rdx 0 rcx 0xffff80002f3a8fb0 rax 0xdeafbeaddeafbead r8 0x7f7fffffc000 r9 0 r10 0x5bbd7f616c967777 r11 0xbdcef06390ad2644 r12 0 r13 0xfffffd806c7b9b60 r14 0xffff800033bbc710 r15 0 rip 0xffffffff823c3615 sys_semop+0x3d5 cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff800033bbc540 ss 0x10 sys_semop+0x3d5: movzwl 0(%rax),%r15d ddb{0}> show proc PROC (syz-executor) tid=267972 pid=35729 tcnt=3 stat=onproc flags process=0 proc=4000000 runpri=36, usrpri=50, slppri=36, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80002f3a9778,0xffff80002f3a8d28 process=0xffff8000fffee698 user=0xffff800033bb7000, vmspace=0xfffffd8076a583d8 estcpu=36, cpticks=1, pctcpu=0.0, user=0, sys=1, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 35729 220717 88368 0 3 0x80 nanoslp syz-executor *35729 267972 88368 0 7 0x4000000 syz-executor 35729 35440 88368 0 3 0x4000080 fsleep syz-executor 96921 364562 23816 60929 2 0xc90 syz-executor 96921 503666 23816 60929 3 0x4000090 fsleep syz-executor 96921 522188 23816 60929 3 0x4000090 kqsel syz-executor 89049 350365 58094 0 2 0xc80 syz-executor 89049 176036 58094 0 3 0x4000080 kqsel syz-executor 89049 467737 58094 0 3 0x4000080 fsleep syz-executor 30026 64840 0 0 3 0x14200 acct acct 35371 104827 46170 0 3 0x3000 suspend syz-executor 35371 98710 46170 0 2 0x4081000 syz-executor 35371 375753 46170 0 3 0x4081000 inode syz-executor 81696 17436 1 0 3 0x100083 ttyin getty 92583 95320 85970 0 2 0x2 syz-executor 23816 396543 85970 0 2 0xc82 syz-executor 5509 227209 85970 0 7 0x2 syz-executor 5520 267519 85970 0 2 0xc82 syz-executor 46170 150478 85970 0 3 0x82 wait syz-executor 58094 447743 85970 0 3 0x82 nanoslp syz-executor 88368 251204 85970 0 3 0x82 nanoslp syz-executor 48340 417672 85970 0 2 0x2 syz-executor 85970 282216 35891 0 3 0x82 kqread syz-executor 35891 118449 61027 0 3 0x10008a sigsusp ksh 61027 224063 3212 0 3 0x98 kqread sshd-session 3212 319961 89726 0 3 0x92 kqread sshd-session 89726 125848 1 0 3 0x88 kqread sshd 43042 373489 63215 74 3 0x1100092 bpf pflogd 63215 284484 1 0 3 0x80 sbwait pflogd 48586 367734 37943 73 3 0x1100090 kqread syslogd 37943 119150 1 0 3 0x100082 sbwait syslogd 29745 469002 1 0 3 0x100080 kqread resolvd 31108 335155 6816 77 3 0x100092 kqread dhcpleased 52940 362906 6816 77 3 0x100092 kqread dhcpleased 6816 238359 1 0 3 0x80 kqread dhcpleased 40954 488200 0 0 3 0x14200 bored smr 57758 148853 0 0 3 0x14200 pgzero zerothread 10919 521793 0 0 3 0x14200 aiodoned aiodoned 11213 444932 0 0 3 0x14200 syncer update 99255 146430 0 0 3 0x14200 cleaner cleaner 48267 516762 0 0 3 0x14200 reaper reaper 61163 112651 0 0 3 0x14200 pgdaemon pagedaemon 24850 303344 0 0 3 0x14200 bored viomb 18734 50072 0 0 3 0x40014200 acpi0 acpi0 20273 186468 0 0 3 0x40014200 idle1 16196 388066 0 0 3 0x14200 bored softnet1 23854 506235 0 0 3 0x14200 bored softnet0 32426 480319 0 0 3 0x14200 bored systqmp 74918 487150 0 0 3 0x14200 bored systq 40531 512506 0 0 3 0x14200 tmoslp softclockmp 67300 367499 0 0 3 0x40014200 tmoslp softclock 93150 51514 0 0 3 0x40014200 idle0 1 346142 0 0 3 0x82 wait init 0 0 -1 0 3 0x10010200 scheduler swapper ddb{0}> show all locks Process 35729 (syz-executor) thread 0xffff80002f3a8fb0 (267972) Process 35371 (syz-executor) thread 0xffff80002f3a94e0 (98710) Process 92583 (syz-executor) thread 0xffff80002f3a8020 (95320) Process 48340 (syz-executor) thread 0xffff8000ffffd9f8 (417672) ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 11074 12099K 12453K 166960K 12976 0 pcb 17 15K 21K 166960K 186 0 rtable 233 9K 9K 166960K 490 0 pf 36 18K 21K 166960K 103 0 ifaddr 45 8K 8K 166960K 77 0 ifgroup 55 2K 2K 166960K 111 0 sysctl 4 1K 9K 166960K 10 0 counters 70 37K 37K 166960K 120 0 ioctlops 0 0K 4K 166960K 1717 0 iov 0 0K 12K 166960K 25 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1387 87K 88K 166960K 2056 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 9K 166960K 8 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 37 0 dirhash 15 2K 2K 166960K 27 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 15 53K 236K 166960K 744 0 sigio 0 0K 0K 166960K 12 0 proc 73 115K 148K 166960K 643 0 subproc 72 4K 4K 166960K 81 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 76 0 in_multi 102 7K 7K 166960K 151 0 ether_multi 1 0K 0K 166960K 10 0 mrt 1 0K 0K 166960K 22 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 127 572K 572K 166960K 127 0 exec 0 0K 1K 166960K 496 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 0K 166960K 1 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 232 160K 174K 166960K 8981 0 UVM aobj 49 8K 8K 166960K 52 0 pinsyscall 40 80K 107K 166960K 1956 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 36 0 NDP 12 0K 2K 166960K 50 0 temp 78 9084K 9154K 166960K 33109 0 kqueue 13 20K 28K 166960K 135 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 69 0 66 1 0 1 1 0 8 0 rtentry 176 151 0 51 6 1 5 6 0 8 0 unpcb 144 401 0 382 5 4 1 4 0 8 0 syncache 336 10 0 10 2 1 1 1 0 8 1 tcpqe 32 4 0 4 2 1 1 1 0 8 1 tcpcb 736 218 0 208 6 4 2 5 0 8 0 arp 136 29 0 10 1 0 1 1 0 8 0 inpcb 328 785 0 769 16 6 10 10 0 8 8 nd6 152 27 0 3 1 0 1 1 0 8 0 pkpcb 40 5 0 5 3 2 1 1 0 8 1 kcovpl 48 9 0 1 1 0 1 1 0 8 0 ppxss 1192 19 0 19 3 2 1 1 0 8 1 pppxif 1504 1 0 1 1 1 0 1 0 8 0 pffrag 232 15 0 4 1 0 1 1 0 482 0 pffrnode 88 14 0 4 1 0 1 1 0 8 0 pffrent 40 20 0 8 1 0 1 1 0 8 0 pfosfp 40 1429 0 1005 5 0 5 5 0 8 0 pfosfpen 112 1429 0 714 21 0 21 21 0 8 0 pfrktable 1344 2 0 2 1 0 1 1 0 8 1 pfanchor 1288 2 0 0 1 0 1 1 0 8 0 pfstitem 24 54 0 19 1 0 1 1 0 8 0 pfstkey 128 56 0 21 2 0 2 2 0 8 0 pfstate 448 54 0 20 4 0 4 4 0 8 0 pfrule 1360 22 0 16 2 1 1 2 0 8 0 art_heap8 4096 2 0 0 2 0 2 2 0 8 0 art_heap4 256 574 0 133 31 1 30 31 0 8 1 art_table 40 576 0 133 5 0 5 5 0 8 0 art_node 32 151 0 64 1 0 1 1 0 8 0 sysvmsgpl 40 7 0 4 1 0 1 1 0 8 0 semupl 112 1 0 1 1 1 0 1 0 8 0 semapl 112 33 0 24 1 0 1 1 0 8 0 shmpl 112 47 0 3 2 0 2 2 0 8 0 dirhash 1024 27 0 8 3 0 3 3 0 8 0 dino2pl 256 2728 0 1264 93 0 93 93 0 8 0 ffsino 296 2728 0 1264 114 0 114 114 0 8 0 nchpl 144 3738 0 2034 64 0 64 64 0 8 0 rtmask 32 1 0 1 1 1 0 1 0 8 0 vnodes 216 3258 0 0 181 0 181 181 0 8 0 namei 1024 13257 0 13255 3 2 1 2 0 8 0 percpumem 16 75 0 25 1 0 1 1 0 8 0 vcpupl 3968 2 0 0 1 0 1 1 0 8 0 vmpool 848 2 0 0 1 0 1 1 0 8 0 kstatmem 264 66 0 40 4 1 3 3 0 8 1 acpiwqpl 32 1 0 1 1 0 1 1 1 8 1 scsiplug 72 1 0 1 1 1 0 1 0 8 0 scxspl 216 17574 0 17574 19 16 3 8 1 8 3 plimitpl 152 255 0 237 1 0 1 1 0 8 0 sigapl 424 1059 0 1013 7 1 6 7 0 8 0 knotepl 120 312 0 0 10 0 10 10 0 8 0 kqueuepl 224 214 0 202 2 1 1 2 0 8 0 pipepl 344 214 0 187 6 3 3 6 0 8 0 fdescpl 528 1041 0 1012 3 0 3 3 0 8 0 filepl 160 6079 0 5852 23 6 17 17 0 8 6 lockfpl 104 377 0 374 2 0 2 2 0 8 1 lockfspl 48 162 0 159 1 0 1 1 0 8 0 sessionpl 144 29 0 20 1 0 1 1 0 8 0 pgrppl 48 46 0 29 1 0 1 1 0 8 0 ucredpl 104 809 0 793 1 0 1 1 0 8 0 zombiepl 144 1288 0 1286 1 0 1 1 0 8 0 processpl 1232 1059 0 1013 5 1 4 5 0 8 0 procpl 664 2127 0 2073 6 0 6 6 0 8 0 sosppl 176 4 0 4 2 1 1 1 0 8 1 sockpl 752 1314 0 1276 26 12 14 14 0 8 10 mcl64k 65536 2 0 0 1 0 1 1 0 8 0 mcl8k 8192 2 0 0 1 0 1 1 0 8 0 mcl4k 4096 130 0 0 17 0 17 17 0 8 0 mcl2k 2048 25 0 0 4 0 4 4 0 8 0 mtagpl 96 12 0 0 1 0 1 1 0 8 0 mbufpl 256 1201 0 0 75 0 75 75 0 8 0 bufpl 280 6633 0 500 439 0 439 439 0 8 0 anonpl 32 9591 0 0 78 0 78 78 0 246 0 amapchunkpl 152 28399 0 27789 40 12 28 32 0 158 2 amappl16 200 3237 0 3006 32 19 13 15 0 8 0 amappl15 192 17 0 17 2 2 0 1 0 8 0 amappl14 184 448 0 447 1 0 1 1 0 8 0 amappl13 176 157 0 145 1 0 1 1 0 8 0 amappl12 168 1308 0 1280 2 0 2 2 0 8 0 amappl11 160 15 0 15 1 1 0 1 0 8 0 amappl10 152 61 0 47 1 0 1 1 0 8 0 amappl9 144 267 0 267 1 1 0 1 0 8 0 amappl8 136 127 0 123 1 0 1 1 0 8 0 amappl7 128 63 0 60 1 0 1 1 0 8 0 amappl6 120 284 0 272 1 0 1 1 0 8 0 amappl5 112 87 0 78 1 0 1 1 0 8 0 amappl4 104 559 0 521 2 0 2 2 0 8 0 amappl3 96 4989 0 4906 4 1 3 3 0 8 0 amappl2 88 1178 0 1110 2 0 2 2 0 8 0 amappl1 80 13216 0 12637 14 0 14 14 0 8 0 amappl 88 8075 0 7913 5 0 5 5 0 92 0 uvmvnodes 80 127 0 0 3 0 3 3 0 8 0 dma4096 4096 1 0 1 1 1 0 1 0 8 0 dma1024 1024 2 0 1 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 7 0 7 1 1 0 1 0 8 0 dma16 16 19 0 18 1 0 1 1 0 8 0 aobjpl 72 51 0 3 1 0 1 1 0 8 0 uaddrrnd 24 1041 0 1012 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1041 0 1012 1 0 1 1 0 8 0 vmmpekpl 168 10683 0 10642 3 0 3 3 0 8 0 vmmpepl 168 74586 0 72557 101 5 96 97 0 357 0 vmsppl 488 1040 0 1012 5 0 5 5 0 8 0 rwobjpl 80 23301 0 22003 28 0 28 28 0 8 0 pdppl 4096 2093 0 2026 109 36 73 87 0 8 6 pvpl 32 17929 0 0 146 1 145 145 0 265 0 pmappl 256 1042 0 1012 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 359 0 47 10 0 10 10 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace sys_semop(ffff80002f3a8fb0,ffff800033bbc710,ffff800033bbc660) at sys_semop+0x3d5 sys/kern/sysv_sem.c:619 syscall(ffff800033bbc710) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff800033bbc710) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x365f97efeb0, count: -3 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp ddb{1}> trace x86_ipi_db(ffff8000299bdff0) 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 __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x2c kd_curproc sys/dev/kcov.c:584 [inline] __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x2c sys/dev/kcov.c:153 __mp_lock(ffffffff8395e380) at __mp_lock+0x1a3 __mp_lock_spin sys/kern/kern_lock.c:142 [inline] __mp_lock(ffffffff8395e380) at __mp_lock+0x1a3 sys/kern/kern_lock.c:173 __mp_acquire_count(ffffffff8395e380,1) at __mp_acquire_count+0x58 sys/kern/kern_lock.c:-1 pool_get(ffffffff839b9b68,1) at pool_get+0x27e sys/kern/subr_pool.c:595 namei(ffff80002a3624d0) at namei+0xdf sys/kern/vfs_lookup.c:145 dofstatat(ffff80002a255a08,ffffff9c,7955f0ddf020,7955f0ddf420,2) at dofstatat+0xf2 sys/kern/vfs_syscalls.c:2105 syscall(ffff80002a362740) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a362740) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7955f0ddf4d0, count: -11