kernel: protection fault trap, code=0 Stopped at sys_semop+0x45b: movzwl 0(%rax),%r15d 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(ffff80002a116a58,ffff8000372864b0,ffff800037286400) at sys_semop+0x45b sys/kern/sysv_sem.c:615 syscall(ffff8000372864b0) at syscall+0xaf8 mi_syscall sys/sys/syscall_mi.h:178 [inline] syscall(ffff8000372864b0) at syscall+0xaf8 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xd02f0f8e470, count: -3 ddb{1}> show registers rdi 0 rsi 0 rbp 0xffff8000372863d0 rbx 0 rdx 0 rcx 0xffff80002a116a58 rax 0xdeaf4152deaf4152 r8 0x7f7fffffc000 r9 0xfffffd807f7d3068 r10 0x9b104a21953490e2 r11 0x46078c3178d53c0b r12 0xffff800001408f04 r13 0 r14 0xffff8000372864b0 r15 0 rip 0xffffffff81b1762b sys_semop+0x45b cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff8000372862b0 ss 0x10 sys_semop+0x45b: movzwl 0(%rax),%r15d ddb{1}> show proc PROC (syz-executor) tid=231162 pid=1920 tcnt=4 stat=onproc flags process=0 proc=4000000 runpri=50, usrpri=50, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80002a116038,0xffff8000ffff02c0 process=0xffff8000341a0da0 user=0xffff800037281000, vmspace=0xfffffd806aebd560 estcpu=36, cpticks=1, pctcpu=0.0, user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 35391 295010 59317 0 2 0 syz-executor 35391 24716 59317 0 3 0x4000080 fsleep syz-executor 43318 144359 11499 0 2 0 syz-executor 43318 174029 11499 0 2 0x4000000 syz-executor 43318 264019 11499 0 3 0x4000080 fsleep syz-executor 43318 732 11499 0 3 0x4000080 fsleep syz-executor 92213 244418 48031 0 2 0 syz-executor 92213 316422 48031 0 3 0x4000080 fsleep syz-executor 39904 114401 17282 0 2 0 syz-executor 39904 438695 17282 0 3 0x4000080 fsleep syz-executor 39904 209542 17282 0 3 0x4000080 fsleep syz-executor 1920 345417 32471 0 2 0 syz-executor * 1920 231162 32471 0 7 0x4000000 syz-executor 1920 240621 32471 0 2 0x4000000 syz-executor 1920 241002 32471 0 2 0x4000000 syz-executor 93093 512533 10036 0 2 0 syz-executor 93093 214175 10036 0 7 0x4000000 syz-executor 93093 298682 10036 0 3 0x4000080 fsleep syz-executor 39995 117167 0 0 3 0x14200 acct acct 33997 181939 35926 0 3 0x82 nanoslp syz-executor 71434 485160 1 0 3 0x100083 ttyin getty 17282 21016 35926 0 3 0x82 nanoslp syz-executor 64254 228628 0 0 3 0x14280 nfsidl nfsio 43843 133036 0 0 3 0x14280 nfsidl nfsio 94706 141697 0 0 3 0x14280 nfsidl nfsio 39786 447680 0 0 3 0x14280 nfsidl nfsio 55413 277555 0 0 3 0x14280 nfsidl nfsio 13393 75097 0 0 3 0x14280 nfsidl nfsio 29601 366379 0 0 3 0x14280 nfsidl nfsio 3080 401286 0 0 3 0x14280 nfsidl nfsio 63061 233058 0 0 3 0x14280 nfsidl nfsio 58998 284038 0 0 3 0x14280 nfsidl nfsio 54330 402643 0 0 3 0x14280 nfsidl nfsio 53787 474028 0 0 3 0x14280 nfsidl nfsio 49119 191695 0 0 3 0x14280 nfsidl nfsio 21773 153000 0 0 3 0x14280 nfsidl nfsio 94073 166328 0 0 3 0x14280 nfsidl nfsio 64955 71435 0 0 3 0x14280 nfsidl nfsio 23571 275671 0 0 3 0x14280 nfsidl nfsio 19983 85016 0 0 3 0x14280 nfsidl nfsio 55889 301873 0 0 3 0x14280 nfsidl nfsio 63655 442687 0 0 3 0x14280 nfsidl nfsio 81441 433223 0 0 3 0x14200 bored sosplice 10036 230861 35926 0 3 0x82 nanoslp syz-executor 48031 188806 35926 0 3 0x82 nanoslp syz-executor 59317 83087 35926 0 3 0x82 nanoslp syz-executor 11499 236356 35926 0 3 0x82 nanoslp syz-executor 90482 517092 35926 0 3 0x82 wait syz-executor 32471 50988 35926 0 3 0x82 nanoslp syz-executor 35926 258700 81626 0 3 0x82 kqread syz-executor 81626 86325 90620 0 3 0x10008a sigsusp ksh 90620 260262 63281 0 3 0x98 kqread sshd-session 63281 218870 73830 0 3 0x92 kqread sshd-session 73830 500908 1 0 3 0x88 kqread sshd 99636 30688 64321 74 3 0x1100092 bpf pflogd 64321 453154 1 0 3 0x80 sbwait pflogd 7418 155920 49159 73 3 0x1100090 kqread syslogd 49159 413840 1 0 3 0x100082 sbwait syslogd 13814 516537 1 0 3 0x100080 kqread resolvd 8997 443347 9618 77 3 0x100092 kqread dhcpleased 39360 156548 9618 77 3 0x100092 kqread dhcpleased 9618 463030 1 0 3 0x80 kqread dhcpleased 77673 113995 0 0 3 0x14200 bored smr 91240 483328 0 0 2 0x14200 zerothread 47358 70851 0 0 3 0x14200 aiodoned aiodoned 25317 145941 0 0 3 0x14200 syncer update 25473 94164 0 0 3 0x14200 cleaner cleaner 90857 200134 0 0 3 0x14200 reaper reaper 90331 176759 0 0 3 0x14200 pgdaemon pagedaemon 98235 289783 0 0 3 0x14200 bored viomb 3384 395512 0 0 3 0x40014200 acpi0 acpi0 32453 108408 0 0 3 0x40014200 idle1 45544 285898 0 0 3 0x14200 bored softnet3 3076 283257 0 0 3 0x14200 bored softnet2 7629 490842 0 0 3 0x14200 bored softnet1 81368 220517 0 0 3 0x14200 bored softnet0 29301 336714 0 0 3 0x14200 bored systqmp 13324 189687 0 0 3 0x14200 bored systq 44103 85931 0 0 3 0x14200 tmoslp softclockmp 77019 114071 0 0 3 0x40014200 tmoslp softclock 90319 299865 0 0 3 0x40014200 idle0 1 45220 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 43318 (syz-executor) thread 0xffff80002a1171f0 (144359) exclusive rwlock vmmaplk r = 0 (0xfffffd806c8eef10) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1155 #1 vm_map_lock_ln+0x12e sys/uvm/uvm_map.c:5255 #2 uvm_map_protect+0xe1 sys/uvm/uvm_map.c:3057 #3 sys_mprotect+0x34c sys/uvm/uvm_mmap.c:585 #4 syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:178 [inline] #4 syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 #5 Xsyscall+0x128 Process 43318 (syz-executor) thread 0xffff80002a117988 (174029) exclusive rrwlock inode r = 0 (0xfffffd806df9a6f8) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1155 #1 rw_enter+0x41b sys/kern/kern_rwlock.c:309 #2 rrw_enter+0xbe sys/kern/kern_rwlock.c:464 #3 VOP_LOCK+0xa6 sys/kern/vfs_vops.c:524 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:564 #5 vget+0x2bd sys/kern/vfs_subr.c:678 #6 cache_lookup+0x36e sys/kern/vfs_cache.c:222 #7 ufs_lookup+0x218 sys/ufs/ufs/ufs_lookup.c:160 #8 VOP_LOOKUP+0x6e sys/kern/vfs_vops.c:85 #9 vfs_lookup+0x8fa sys/kern/vfs_lookup.c:566 #10 namei+0x7aa sys/kern/vfs_lookup.c:250 #11 ptmioctl+0x4cb sys/kern/tty_pty.c:1143 #12 VOP_IOCTL+0xac sys/kern/vfs_vops.c:264 #13 vn_ioctl+0xf6 sys/kern/vfs_vnops.c:525 #14 sys_ioctl+0x67c #15 syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:178 [inline] #15 syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 #16 Xsyscall+0x128 Process 1920 (syz-executor) thread 0xffff80002a116a58 (231162) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff836258d8) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1155 #1 __mp_acquire_count+0x58 #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:170 #5 sys_semop+0x234 sys/kern/sysv_sem.c:564 #6 syscall+0xaf8 mi_syscall sys/sys/syscall_mi.h:178 [inline] #6 syscall+0xaf8 sys/arch/amd64/amd64/trap.c:577 #7 Xsyscall+0x128 Process 1920 (syz-executor) thread 0xffff8000ffff16f0 (241002) exclusive rrwlock inode r = 0 (0xfffffd806de0c2c8) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1155 #1 rw_enter+0x41b sys/kern/kern_rwlock.c:309 #2 rrw_enter+0xbe sys/kern/kern_rwlock.c:464 #3 VOP_LOCK+0xa6 sys/kern/vfs_vops.c:524 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:564 #5 vfs_lookup+0x109 sys/kern/vfs_lookup.c:418 #6 namei+0x7aa sys/kern/vfs_lookup.c:250 #7 vn_open+0x1f4 sys/kern/vfs_vnops.c:107 #8 doopenat+0x31d sys/kern/vfs_syscalls.c:1123 #9 syscall+0xaf8 mi_syscall sys/sys/syscall_mi.h:178 [inline] #9 syscall+0xaf8 sys/arch/amd64/amd64/trap.c:577 #10 Xsyscall+0x128 Process 93093 (syz-executor) thread 0xffff80002a116548 (214175) exclusive rrwlock inode r = 0 (0xfffffd806df95c50) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1155 #1 rw_enter+0x41b sys/kern/kern_rwlock.c:309 #2 rrw_enter+0xbe sys/kern/kern_rwlock.c:464 #3 VOP_LOCK+0xa6 sys/kern/vfs_vops.c:524 #4 ufs_ihashins+0x4f sys/ufs/ufs/ufs_ihash.c:169 #5 ffs_vget+0x187 sys/ufs/ffs/ffs_vfsops.c:1230 #6 ffs_inode_alloc+0x283 sys/ufs/ffs/ffs_alloc.c:393 #7 ufs_makeinode+0xcb sys/ufs/ufs/ufs_vnops.c:1732 #8 ufs_create+0x4e sys/ufs/ufs/ufs_vnops.c:147 #9 VOP_CREATE+0xff sys/kern/vfs_vops.c:103 #10 vn_open+0x491 sys/kern/vfs_vnops.c:116 #11 doopenat+0x31d sys/kern/vfs_syscalls.c:1123 #12 syscall+0xaf8 mi_syscall sys/sys/syscall_mi.h:178 [inline] #12 syscall+0xaf8 sys/arch/amd64/amd64/trap.c:577 #13 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd806de07d58) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1155 #1 rw_enter+0x41b sys/kern/kern_rwlock.c:309 #2 rrw_enter+0xbe sys/kern/kern_rwlock.c:464 #3 VOP_LOCK+0xa6 sys/kern/vfs_vops.c:524 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:564 #5 vfs_lookup+0x109 sys/kern/vfs_lookup.c:418 #6 namei+0x7aa sys/kern/vfs_lookup.c:250 #7 vn_open+0x1f4 sys/kern/vfs_vnops.c:107 #8 doopenat+0x31d sys/kern/vfs_syscalls.c:1123 #9 syscall+0xaf8 mi_syscall sys/sys/syscall_mi.h:178 [inline] #9 syscall+0xaf8 sys/arch/amd64/amd64/trap.c:577 #10 Xsyscall+0x128 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10243 11342K 11509K 166960K 13454 0 pcb 17 16K 18K 166960K 350 0 rtable 235 7K 7K 166960K 588 0 pf 35 17K 21K 166960K 133 0 ifaddr 43 7K 8K 166960K 76 0 ifgroup 55 2K 2K 166960K 111 0 sysctl 4 1K 1K 166960K 6 0 counters 64 36K 36K 166960K 100 0 ioctlops 0 0K 4K 166960K 1744 0 iov 0 0K 28K 166960K 137 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1481 93K 93K 166960K 3016 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 9K 166960K 27 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 49 0 dirhash 12 2K 2K 166960K 33 0 ACPI 1690 195K 286K 166960K 12468 0 file desc 18 65K 93K 166960K 1614 0 sigio 0 0K 0K 166960K 126 0 proc 75 103K 164K 166960K 697 0 subproc 104 6K 6K 166960K 134 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 276 0 in_multi 99 7K 7K 166960K 173 0 ether_multi 1 0K 0K 166960K 5 0 mrt 0 0K 0K 166960K 4 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 247 1102K 1102K 166960K 247 0 exec 0 0K 1K 166960K 721 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 259 73K 92K 166960K 16958 0 UVM aobj 108 5K 7K 166960K 112 0 pinsyscall 43 86K 104K 166960K 2794 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 2 0K 0K 166960K 88 0 NDP 12 0K 2K 166960K 52 0 temp 76 6828K 6900K 166960K 52164 0 kqueue 13 20K 30K 166960K 266 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 24 0 0 1 0 1 1 0 8 0 rtpcb 120 137 0 134 1 0 1 1 0 8 0 rtentry 112 193 0 84 4 0 4 4 0 8 0 unpcb 144 1040 0 1021 6 4 2 6 0 8 1 syncache 336 15 0 15 4 3 1 1 0 8 1 tcpqe 32 5 0 5 2 1 1 1 0 8 1 tcpcb 808 687 0 614 13 5 8 8 0 8 0 arp 120 33 0 14 1 0 1 1 0 8 0 inpcb 336 1914 0 1835 22 15 7 13 0 8 0 nd6 136 39 0 6 2 0 2 2 0 8 0 pkpcb 40 5 0 5 4 4 0 1 0 8 0 kcovpl 48 10 0 2 1 0 1 1 0 8 0 ppxss 1168 11 0 11 3 2 1 1 0 8 1 pfstscr 40 6 0 6 1 1 0 1 0 8 0 pffrag 232 12 0 2 1 0 1 1 0 482 0 pffrnode 88 12 0 2 1 0 1 1 0 8 0 pffrent 40 107 0 97 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 pftag 88 1 0 0 1 0 1 1 0 8 0 pfstitem 24 84 0 26 1 0 1 1 0 8 0 pfstkey 128 87 0 29 2 0 2 2 0 8 0 pfstate 376 87 0 29 6 0 6 6 0 8 0 pfrule 1344 48 0 35 2 0 2 2 0 8 0 art_heap8 4096 2 0 0 2 0 2 2 0 8 0 art_heap4 256 667 0 196 32 2 30 31 0 8 0 art_table 32 669 0 196 5 0 5 5 0 8 0 art_node 16 174 0 77 1 0 1 1 0 8 0 sysvmsgpl 40 22 0 14 2 1 1 1 0 8 0 semapl 112 45 0 36 1 0 1 1 0 8 0 shmpl 112 109 0 4 3 0 3 3 0 8 0 dirhash 1024 31 0 14 3 0 3 3 0 8 0 dino2pl 256 4581 0 3078 95 0 95 95 0 8 0 ffsino 272 4581 0 3078 102 1 101 102 0 8 0 nchpl 144 6826 0 5135 64 0 64 64 0 8 0 uvmvnodes 80 5544 0 0 114 0 114 114 0 8 0 vnodes 216 5545 0 0 309 0 309 309 0 8 0 namei 1024 25024 0 25022 5 4 1 2 0 8 0 percpumem 16 64 0 18 1 0 1 1 0 8 0 kstatmem 264 60 0 36 2 0 2 2 0 8 0 scsiplug 72 6 0 6 2 2 0 1 0 8 0 scxspl 216 23111 0 23111 12 11 1 8 1 8 1 plimitpl 152 652 0 633 1 0 1 1 0 8 0 sigapl 424 1946 0 1874 9 0 9 9 0 8 0 futexpl 64 21785 0 21778 1 0 1 1 0 8 0 knotepl 120 575 0 0 17 0 17 17 0 8 0 kqueuepl 216 447 0 438 5 0 5 5 0 8 4 pipepl 320 323 0 296 9 6 3 6 0 8 0 fdescpl 496 1902 0 1870 5 0 5 5 0 8 0 filepl 152 13502 0 13116 23 7 16 18 0 8 1 lockfpl 104 550 0 548 1 0 1 1 0 8 0 lockfspl 48 226 0 224 1 0 1 1 0 8 0 sessionpl 144 36 0 27 1 0 1 1 0 8 0 pgrppl 48 68 0 51 1 0 1 1 0 8 0 ucredpl 104 3474 0 3459 1 0 1 1 0 8 0 zombiepl 144 2447 0 2445 2 1 1 1 0 8 0 processpl 1160 1946 0 1874 7 1 6 6 0 8 0 procpl 648 4356 0 4272 8 0 8 8 0 8 0 srpgc 96 4 0 4 2 2 0 1 0 8 0 sosppl 168 3 0 3 3 2 1 1 0 8 1 sockpl 664 3118 0 3017 30 21 9 19 0 8 0 mcl64k 65536 7 0 0 1 0 1 1 0 8 0 mcl16k 16384 8 0 0 1 0 1 1 0 8 0 mcl12k 12288 5 0 0 1 0 1 1 0 8 0 mcl9k 9216 2 0 0 1 0 1 1 0 8 0 mcl8k 8192 8 0 0 1 0 1 1 0 8 0 mcl4k 4096 139 0 0 18 0 18 18 0 8 0 mcl2k2 2112 2 0 0 1 0 1 1 0 8 0 mcl2k 2048 32 0 0 4 0 4 4 0 8 0 mtagpl 96 45 0 0 2 0 2 2 0 8 0 mbufpl 256 324 0 0 20 0 20 20 0 8 0 bufpl 280 7563 0 1389 442 0 442 442 0 8 0 anonpl 24 345535 0 341719 102 38 64 76 0 185 19 amapchunkpl 152 56998 0 56418 50 18 32 43 0 158 9 amappl16 200 8803 0 8770 43 27 16 18 0 8 8 amappl15 192 5 0 5 1 1 0 1 0 8 0 amappl14 184 145 0 133 1 0 1 1 0 8 0 amappl13 176 12 0 12 2 1 1 1 0 8 1 amappl12 168 2595 0 2563 4 2 2 3 0 8 0 amappl11 160 75 0 61 1 0 1 1 0 8 0 amappl10 152 15 0 15 1 1 0 1 0 8 0 amappl9 144 156 0 156 1 1 0 1 0 8 0 amappl8 136 32 0 29 1 0 1 1 0 8 0 amappl7 128 129 0 116 1 0 1 1 0 8 0 amappl6 120 217 0 215 1 0 1 1 0 8 0 amappl5 112 154 0 142 1 0 1 1 0 8 0 amappl4 104 372 0 354 1 0 1 1 0 8 0 amappl3 96 10264 0 10154 3 0 3 3 0 8 0 amappl2 88 2302 0 2216 4 1 3 3 0 8 0 amappl1 80 14846 0 14284 15 1 14 14 0 8 0 amappl 88 16406 0 16208 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 7 0 7 2 2 0 1 0 8 0 dma128 128 254 0 254 2 2 0 1 0 8 0 dma64 64 7 0 7 2 1 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 72 111 0 4 2 0 2 2 0 8 0 uaddrrnd 24 1903 0 1871 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1903 0 1871 1 0 1 1 0 8 0 vmmpekpl 168 17134 0 17085 3 0 3 3 0 8 0 vmmpepl 168 125959 0 124013 110 12 98 98 0 357 4 vmsppl 448 1902 0 1871 6 2 4 5 0 8 0 rwobjpl 56 43168 0 36553 97 2 95 95 0 8 0 pdppl 4096 3813 0 3742 123 52 71 85 0 8 0 pvpl 32 28904 0 0 233 0 233 233 0 265 0 pmappl 248 1902 0 1871 3 0 3 3 0 8 0 extentpl 40 55 0 38 1 0 1 1 0 8 0 phpool 112 460 0 90 11 0 11 11 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp ddb{0}> trace x86_ipi_db(ffffffff8348eff0) at x86_ipi_db+0x27 sys/arch/amd64/amd64/db_interface.c:393 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+0x95 kd_claim sys/dev/kcov.c:632 [inline] __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x95 sys/dev/kcov.c:157 __mp_lock(ffffffff836256d0) at __mp_lock+0x1a3 __mp_lock_spin sys/kern/kern_lock.c:113 [inline] __mp_lock(ffffffff836256d0) at __mp_lock+0x1a3 sys/kern/kern_lock.c:144 __mp_acquire_count(ffffffff836256d0,1) at __mp_acquire_count+0x58 mi_switch() at mi_switch+0x4b7 sys/kern/sched_bsd.c:441 sleep_finish(0,1) at sleep_finish+0x2f2 sys/kern/kern_synch.c:425 biowait(fffffd806abc2a10) at biowait+0xc1 sys/kern/vfs_bio.c:1246 bwrite(fffffd806abc2a10) at bwrite+0x2e2 sys/kern/vfs_bio.c:758 ffs_update(fffffd806df95bb8,1) at ffs_update+0x34c sys/ufs/ffs/ffs_inode.c:111 ufs_makeinode(8000,fffffd8065600608,ffff800036dbc188,ffff800036dbc1b8) at ufs_makeinode+0x4b2 sys/ufs/ufs/ufs_vnops.c:1764 ufs_create(ffff800036dbbf00) at ufs_create+0x4e sys/ufs/ufs/ufs_vnops.c:147 VOP_CREATE(fffffd8065600608,ffff800036dbc188,ffff800036dbc1b8,ffff800036dbbf88) at VOP_CREATE+0xff sys/kern/vfs_vops.c:103 vn_open(ffff800036dbc158,37847b63,0) at vn_open+0x491 sys/kern/vfs_vnops.c:116 doopenat(ffff80002a116548,ffffff9c,20000040,37847f62,0,ffff800036dbc300) at doopenat+0x31d sys/kern/vfs_syscalls.c:1123 syscall(ffff800036dbc3b0) at syscall+0xaf8 mi_syscall sys/sys/syscall_mi.h:178 [inline] syscall(ffff800036dbc3b0) at syscall+0xaf8 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x9116ff28d0, count: -18 ddb{0}> machine ddbcpu 1 Stopped at sys_semop+0x45b: movzwl 0(%rax),%r15d ddb{1}> trace sys_semop(ffff80002a116a58,ffff8000372864b0,ffff800037286400) at sys_semop+0x45b sys/kern/sysv_sem.c:615 syscall(ffff8000372864b0) at syscall+0xaf8 mi_syscall sys/sys/syscall_mi.h:178 [inline] syscall(ffff8000372864b0) at syscall+0xaf8 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xd02f0f8e470, count: -3