login: kernel: protection fault trap, code=0 Stopped at sys_semop+0x3f9: movzwl 0(%r15),%r12d ddb{1}> ddb{1}> set $lines = 0 ddb{1}> set $maxwidth = 0 ddb{1}> show panic the kernel did not panic ddb{1}> trace sys_semop(ffff80003c424038,ffff80003c45d940,ffff80003c45d890) at sys_semop+0x3f9 sys/kern/sysv_sem.c:602 syscall(ffff80003c45d940) at syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c45d940) at syscall+0xb08 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x32456f372f0, count: -3 ddb{1}> show registers rdi 0 rsi 0xfff9 __ALIGN_SIZE+0xeff9 rbp 0xffff80003c45d860 rbx 0xffff80000163c804 rdx 0 rcx 0xffff80003c424038 rax 0xffff8000299ddff0 r8 0x7f7fffffc000 r9 0x1 r10 0x4bcff8729485519b r11 0xab4ade8acbbecc94 r12 0xffff80000163c804 r13 0xfffffff9 r14 0x4152 __ALIGN_SIZE+0x3152 r15 0xdeaf4152deaf4152 rip 0xffffffff83322c49 sys_semop+0x3f9 cs 0x8 rflags 0x10286 __ALIGN_SIZE+0xf286 rsp 0xffff80003c45d740 ss 0x10 sys_semop+0x3f9: movzwl 0(%r15),%r12d ddb{1}> show proc PROC (syz-executor) tid=105310 pid=18988 tcnt=4 stat=onproc flags process=0 proc=4000000 runpri=50, usrpri=50, slppri=36, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80003c4259d8,0xffff80003c425758 process=0xffff80003c414020 user=0xffff80003c458000, vmspace=0xfffffd806e3925c8 estcpu=36, cpticks=0, pctcpu=0.0, user=0, sys=0, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 18988 480112 74995 0 7 0 syz-executor *18988 105310 74995 0 7 0x4000000 syz-executor 18988 172571 74995 0 3 0x4000080 fsleep syz-executor 18988 315159 74995 0 3 0x4000080 fsleep syz-executor 86289 330881 75463 0 3 0x80 nanoslp syz-executor 86289 363122 75463 0 3 0x4000080 msgwait syz-executor 86289 274618 75463 0 3 0x4000080 fsleep syz-executor 86289 355852 75463 0 3 0x4000080 fsleep syz-executor 20191 268005 47082 0 3 0x80 nanoslp syz-executor 20191 336501 47082 0 3 0x4000080 kqread syz-executor 20191 347833 47082 0 3 0x4000080 fsleep syz-executor 20191 474858 47082 0 3 0x4000080 fsleep syz-executor 80440 420333 54269 0 3 0x80 nanoslp syz-executor 80440 404487 54269 0 3 0x4000080 ttyin syz-executor 80440 434218 54269 0 3 0x4000080 fsleep syz-executor 80440 276718 54269 0 3 0x4000080 fsleep syz-executor 27961 318605 73131 60929 3 0x90 nanoslp syz-executor 27961 69009 73131 60929 2 0x4000010 syz-executor 27961 487650 73131 60929 3 0x4000090 fsleep syz-executor 75615 209948 21124 0 3 0x80 nanoslp syz-executor 75615 26142 21124 0 3 0x4000080 kqread syz-executor 75615 129351 21124 0 3 0x4000080 fsleep syz-executor 75615 377760 21124 0 3 0x4000080 fsleep syz-executor 44662 55088 71339 0 3 0x3000 suspend syz-executor 44662 65609 71339 0 3 0x4081000 biowait syz-executor 44662 66867 71339 0 3 0x4081000 inode syz-executor 96330 45055 0 0 3 0x14200 acct acct 8758 444927 1 0 3 0x100083 ttyin getty 21124 518724 99181 0 3 0x82 nanoslp syz-executor 75463 69079 99181 0 3 0x82 nanoslp syz-executor 58492 469026 0 0 3 0x14200 bored sosplice 47082 150058 99181 0 3 0x82 nanoslp syz-executor 18647 210302 99181 0 3 0x82 nanoslp syz-executor 54269 58591 99181 0 3 0x82 nanoslp syz-executor 74995 24325 99181 0 3 0x82 nanoslp syz-executor 73131 163826 99181 0 3 0x82 nanoslp syz-executor 71339 229711 99181 0 3 0x82 wait syz-executor 99181 188867 22048 0 3 0x82 kqread syz-executor 22048 253455 23913 0 3 0x10008a sigsusp ksh 23913 82553 80397 0 3 0x98 kqread sshd-session 80397 66971 38646 0 3 0x92 kqread sshd-session 38646 486130 1 0 3 0x88 kqread sshd 51609 87299 61192 74 3 0x1100092 bpf pflogd 61192 366526 1 0 3 0x80 sbwait pflogd 10332 187469 25625 73 3 0x1100090 kqread syslogd 25625 312885 1 0 3 0x100082 sbwait syslogd 53755 178015 1 0 3 0x100080 kqread resolvd 12744 479410 6925 77 3 0x100092 kqread dhcpleased 28386 380130 6925 77 3 0x100092 kqread dhcpleased 6925 39524 1 0 3 0x80 kqread dhcpleased 87289 300540 0 0 3 0x14200 bored smr 85084 137780 0 0 3 0x14200 pgzero zerothread 40493 73731 0 0 3 0x14200 aiodoned aiodoned 76199 155641 0 0 3 0x14200 syncer update 78590 272758 0 0 3 0x14200 cleaner cleaner 45823 300242 0 0 3 0x14200 reaper reaper 76988 348013 0 0 3 0x14200 pgdaemon pagedaemon 98459 271528 0 0 3 0x14200 bored viomb 61708 340007 0 0 3 0x40014200 acpi0 acpi0 29068 158208 0 0 3 0x40014200 idle1 41741 76644 0 0 3 0x14200 bored softnet7 26230 34840 0 0 3 0x14200 bored softnet6 42167 224498 0 0 3 0x14200 bored softnet5 26432 56061 0 0 3 0x14200 bored softnet4 32365 293714 0 0 3 0x14200 bored softnet3 71552 235673 0 0 3 0x14200 bored softnet2 92765 93276 0 0 3 0x14200 bored softnet1 62840 118757 0 0 3 0x14200 bored softnet0 35780 214368 0 0 3 0x14200 bored systqmp 61839 123763 0 0 3 0x14200 bored systq 7324 96372 0 0 3 0x14200 tmoslp softclockmp 1118 458823 0 0 3 0x40014200 tmoslp softclock 5759 428753 0 0 3 0x40014200 idle0 1 172766 0 0 3 0x82 wait init 0 0 -1 0 3 0x10010200 scheduler swapper ddb{1}> show all locks Process 18988 (syz-executor) thread 0xffff80003c424038 (105310) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff838e2d38) #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 malloc+0xe5 sys/kern/kern_malloc.c:174 #3 sys_semop+0x234 sys/kern/sysv_sem.c:564 #4 syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] #4 syscall+0xb08 sys/arch/amd64/amd64/trap.c:748 #5 Xsyscall+0x128 Process 27961 (syz-executor) thread 0xffff80003c4294b0 (69009) exclusive rwlock vmmaplk r = 0 (0xfffffd8067af6128) #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+0x42b sys/kern/kern_rwlock.c:319 #2 vm_map_lock_ln+0x12e sys/uvm/uvm_map.c:5168 #3 uvmfault_lookup+0xe8 sys/uvm/uvm_fault.c:1918 #4 uvm_fault_check+0x8a5 uvmfault_amapcopy sys/uvm/uvm_fault.c:235 [inline] #4 uvm_fault_check+0x8a5 sys/uvm/uvm_fault.c:784 #5 uvm_fault+0x106 sys/uvm/uvm_fault.c:677 #6 uvm_fault_wire+0x73 sys/uvm/uvm_fault.c:1745 #7 uvm_vslock_device+0x112 sys/uvm/uvm_glue.c:169 #8 physio+0x277 sys/kern/kern_physio.c:139 #9 spec_write+0x120 sys/kern/spec_vnops.c:302 #10 VOP_WRITE+0x102 sys/kern/vfs_vops.c:245 #11 vn_write+0x1d4 sys/kern/vfs_vnops.c:408 #12 dofilewritev+0x23c sys/kern/sys_generic.c:380 #13 sys_write+0xa2 sys/kern/sys_generic.c:300 #14 syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline] #14 syscall+0xbc6 sys/arch/amd64/amd64/trap.c:748 #15 Xsyscall+0x128 Process 44662 (syz-executor) thread 0xffff80002a2a1730 (65609) exclusive rrwlock inode r = 0 (0xfffffd806e096248) #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+0x42b sys/kern/kern_rwlock.c:319 #2 rrw_enter+0xc6 sys/kern/kern_rwlock.c:621 #3 VOP_LOCK+0xa6 sys/kern/vfs_vops.c:527 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:570 #5 vn_write+0x190 sys/kern/vfs_vnops.c:405 #6 dofilewritev+0x23c sys/kern/sys_generic.c:380 #7 sys_write+0xa2 sys/kern/sys_generic.c:300 #8 syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline] #8 syscall+0xbc6 sys/arch/amd64/amd64/trap.c:748 #9 Xsyscall+0x128 Process 44662 (syz-executor) thread 0xffff80002a2a02b0 (66867) exclusive rrwlock inode r = 0 (0xfffffd8067c966a8) #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+0x42b sys/kern/kern_rwlock.c:319 #2 rrw_enter+0xc6 sys/kern/kern_rwlock.c:621 #3 VOP_LOCK+0xa6 sys/kern/vfs_vops.c:527 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:570 #5 vfs_lookup+0x109 sys/kern/vfs_lookup.c:418 #6 namei+0x7aa sys/kern/vfs_lookup.c:250 #7 doreadlinkat+0x93 sys/kern/vfs_syscalls.c:2210 #8 syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] #8 syscall+0xb08 sys/arch/amd64/amd64/trap.c:748 #9 Xsyscall+0x128 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10248 11229K 12328K 166960K 12732 0 pcb 19 14K 16K 166960K 211 0 rtable 196 10K 11K 166960K 382 0 pf 40 19K 82K 166960K 135 0 ifaddr 39 6K 8K 166960K 84 0 ifgroup 55 2K 2K 166960K 124 0 sysctl 3 1K 9K 166960K 10 0 counters 68 36K 37K 166960K 278 0 ioctlops 0 0K 4K 166960K 1655 0 iov 0 0K 34K 166960K 79 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1463 92K 92K 166960K 2135 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 1K 1K 166960K 34 0 dirhash 12 2K 2K 166960K 30 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 18 65K 240K 166960K 849 0 sigio 0 0K 0K 166960K 10 0 proc 72 115K 163K 166960K 673 0 subproc 72 4K 4K 166960K 90 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 1 0K 0K 166960K 98 0 in_multi 85 6K 7K 166960K 143 0 ether_multi 1 0K 0K 166960K 6 0 mrt 2 0K 0K 166960K 10 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 217 970K 970K 166960K 217 0 exec 0 0K 1K 166960K 467 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 276 176K 193K 166960K 9523 0 UVM aobj 30 3K 3K 166960K 35 0 pinsyscall 43 86K 105K 166960K 2000 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 1K 166960K 40 0 NDP 12 0K 2K 166960K 58 0 temp 66 8681K 8933K 166960K 37383 0 kqueue 15 24K 30K 166960K 162 0 SYN cache 2 16K 16K 166960K 2 0 ddb{1}> 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 83 0 78 1 0 1 1 0 8 0 rtentry 176 127 0 51 5 0 5 5 0 8 0 unpcb 144 580 0 558 7 1 6 6 0 8 5 syncache 336 8 0 8 3 2 1 1 0 8 1 tcpqe 32 2 0 2 1 0 1 1 0 8 1 tcpcb 736 231 0 224 7 6 1 7 0 8 0 arp 128 13 0 4 1 0 1 1 0 8 0 inpcb 328 741 0 728 11 4 7 7 0 8 5 nd6 144 26 0 8 1 0 1 1 0 8 0 pkpcb 40 9 0 9 3 2 1 1 0 8 1 kcovpl 48 10 0 2 1 0 1 1 0 8 0 ppxss 1192 98 0 98 2 1 1 1 0 8 1 pppxif 1504 2 0 2 2 2 0 1 0 8 0 pfstscr 40 3 0 1 1 0 1 1 0 8 0 pffrag 232 10 0 2 1 0 1 1 0 482 0 pffrnode 88 9 0 2 1 0 1 1 0 8 0 pffrent 40 14 0 5 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 2 1 1 1 0 8 0 pfanchor 1288 1 0 0 1 0 1 1 0 8 0 pftag 88 2 0 2 2 2 0 1 0 8 0 pfstitem 24 67 0 19 1 0 1 1 0 8 0 pfstkey 128 69 0 22 2 0 2 2 0 8 0 pfstate 384 65 0 20 5 0 5 5 0 8 0 pfrule 1344 35 0 27 2 1 1 2 0 8 0 rttmr 136 2 0 2 1 0 1 1 0 8 1 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 617 0 240 33 4 29 29 0 8 3 art_table 40 618 0 240 5 0 5 5 0 8 0 art_node 32 127 0 60 1 0 1 1 0 8 0 sysvmsgpl 40 16 0 11 2 1 1 1 0 8 0 semupl 112 3 0 3 2 2 0 1 0 8 0 semapl 112 30 0 21 1 0 1 1 0 8 0 shmpl 112 32 0 5 1 0 1 1 0 8 0 dirhash 1024 29 0 12 3 0 3 3 0 8 0 dino2pl 256 2924 0 1411 95 0 95 95 0 8 0 ffsino 296 2924 0 1411 117 0 117 117 0 8 0 nchpl 144 4037 0 2334 64 0 64 64 0 8 0 rtmask 32 7 0 7 1 0 1 1 0 8 1 uvmvnodes 80 3497 0 0 72 0 72 72 0 8 0 vnodes 216 3497 0 0 195 0 195 195 0 8 0 namei 1024 14469 0 14468 3 1 2 2 0 8 1 percpumem 16 154 0 105 1 0 1 1 0 8 0 pfiaddrpl 120 1 0 0 1 0 1 1 0 8 0 kstatmem 264 80 0 52 4 1 3 3 0 8 0 acpiwqpl 32 1 0 1 1 0 1 1 1 8 1 scsiplug 72 2 0 2 2 1 1 1 0 8 1 scxspl 216 20282 0 20281 9 7 2 7 1 8 1 plimitpl 152 111 0 91 1 0 1 1 0 8 0 sigapl 424 1146 0 1090 7 0 7 7 0 8 0 knotepl 120 535 0 0 17 0 17 17 0 8 0 kqueuepl 224 382 0 371 5 0 5 5 0 8 4 pipepl 344 232 0 204 9 0 9 9 0 8 6 fdescpl 528 1120 0 1088 3 0 3 3 0 8 0 filepl 160 6716 0 6481 27 8 19 24 0 8 7 lockfpl 104 377 0 370 1 0 1 1 0 8 0 lockfspl 48 168 0 161 1 0 1 1 0 8 0 sessionpl 144 29 0 20 1 0 1 1 0 8 0 pgrppl 48 52 0 35 1 0 1 1 0 8 0 ucredpl 104 692 0 678 1 0 1 1 0 8 0 zombiepl 144 1437 0 1435 1 0 1 1 0 8 0 processpl 1248 1146 0 1090 5 0 5 5 0 8 0 procpl 656 2388 0 2312 8 1 7 7 0 8 0 sosppl 168 2 0 2 1 1 0 1 0 8 0 sockpl 752 1495 0 1455 32 20 12 23 0 8 7 mcl64k 65536 3 0 0 1 0 1 1 0 8 0 mcl16k 16384 1 0 0 1 0 1 1 0 8 0 mcl12k 12288 2 0 0 1 0 1 1 0 8 0 mcl9k 9216 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 3 0 0 1 0 1 1 0 8 0 mcl4k 4096 114 0 0 15 0 15 15 0 8 0 mcl2k 2048 34 0 0 5 0 5 5 0 8 0 mtagpl 96 31 0 0 1 0 1 1 0 8 0 mbufpl 256 273 0 0 17 0 17 17 0 8 0 bufpl 280 7858 0 1715 439 0 439 439 0 8 0 anonpl 32 10130 0 0 82 0 82 82 0 246 0 amapchunkpl 152 31517 0 30905 42 11 31 31 0 158 7 amappl16 200 3670 0 3382 29 13 16 23 0 8 0 amappl15 192 4 0 4 1 1 0 1 0 8 0 amappl14 184 125 0 113 1 0 1 1 0 8 0 amappl13 176 7 0 7 1 1 0 1 0 8 0 amappl12 168 1802 0 1770 4 1 3 3 0 8 0 amappl11 160 54 0 40 1 0 1 1 0 8 0 amappl10 152 10 0 9 2 1 1 1 0 8 0 amappl9 144 248 0 248 1 1 0 1 0 8 0 amappl8 136 40 0 37 1 0 1 1 0 8 0 amappl7 128 114 0 101 1 0 1 1 0 8 0 amappl6 120 206 0 202 1 0 1 1 0 8 0 amappl5 112 128 0 118 1 0 1 1 0 8 0 amappl4 104 331 0 311 1 0 1 1 0 8 0 amappl3 96 6075 0 5942 6 2 4 4 0 8 0 amappl2 88 701 0 637 2 0 2 2 0 8 0 amappl1 80 12126 0 11521 15 0 15 15 0 8 0 amappl 88 8662 0 8462 5 0 5 5 0 92 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 8 0 8 3 2 1 1 0 8 1 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 34 0 5 1 0 1 1 0 8 0 uaddrrnd 24 1120 0 1088 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1120 0 1088 1 0 1 1 0 8 0 vmmpekpl 168 10784 0 10749 3 0 3 3 0 8 0 vmmpepl 168 77575 0 75233 110 3 107 107 0 357 5 vmsppl 488 1119 0 1088 6 1 5 5 0 8 0 rwobjpl 80 26400 0 21632 98 0 98 98 0 8 0 pdppl 4096 2247 0 2176 109 38 71 83 0 8 0 pvpl 32 17558 0 0 142 0 142 142 0 265 0 pmappl 256 1119 0 1088 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 300 0 53 8 0 8 8 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp ddb{0}> trace x86_ipi_db(ffffffff838aeff0) 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(ffffffff838e2b30) at __mp_lock+0x1a3 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff838e2b30) at __mp_lock+0x1a3 sys/kern/kern_lock.c:165 intr_handler(ffff80003c4572f0,ffff800000079a80) at intr_handler+0xe1 sys/arch/amd64/amd64/intr.c:559 Xintr_ioapic_edge23_untramp() at Xintr_ioapic_edge23_untramp+0x18f __mp_lock(ffffffff838e2b30) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:134 [inline] __mp_lock(ffffffff838e2b30) at __mp_lock+0x192 sys/kern/kern_lock.c:165 __mp_acquire_count(ffffffff838e2b30,1) at __mp_acquire_count+0x58 sys/kern/kern_lock.c:-1 pool_get(ffffffff839b4948,1) at pool_get+0x265 sys/kern/subr_pool.c:588 thread_fork(ffff80003c4259d8,3241d381630,324affb2400,324affb2430,ffff80003c457650) at thread_fork+0x128 thread_new sys/kern/kern_fork.c:151 [inline] thread_fork(ffff80003c4259d8,3241d381630,324affb2400,324affb2430,ffff80003c457650) at thread_fork+0x128 sys/kern/kern_fork.c:574 sys___tfork(ffff80003c4259d8,ffff80003c457700,ffff80003c457650) at sys___tfork+0x1b6 sys/kern/kern_fork.c:139 syscall(ffff80003c457700) at syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c457700) at syscall+0xb08 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x700ff67be710, count: -14 ddb{0}> machine ddbcpu 1 Stopped at sys_semop+0x3f9: movzwl 0(%r15),%r12d ddb{1}> trace sys_semop(ffff80003c424038,ffff80003c45d940,ffff80003c45d890) at sys_semop+0x3f9 sys/kern/sysv_sem.c:602 syscall(ffff80003c45d940) at syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c45d940) at syscall+0xb08 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x32456f372f0, count: -3