uvm_fault(0xffffffff82afb430, 0xffff80001f2ef040, 0, 2) -> d kernel: page fault trap, code=0 Stopped at memset+0x4e: repe stosq %es:(%rdi) TID PID UID PRFLAGS PFLAGS CPU COMMAND 247955 92727 0 0x2 0 0 syz-executor.0 * 72897 26839 0 0x2 0x1 1K syz-executor.3 memset() at memset+0x4e ffs_write(ffff8000294f0090) at ffs_write+0x924 VOP_WRITE(fffffd805fadf2e0,ffff8000294f0148,3,fffffd807f7d88a0) at VOP_WRITE+0xbf sys/kern/vfs_vops.c:245 ktrwriteraw(ffff80002120e548,fffffd805fadf2e0,fffffd807f7d88a0,ffff8000294f0218,ffff8000294f01f0) at ktrwriteraw+0x15f sys/kern/kern_ktrace.c:666 ktrsyscall(ffff80002120e548,b,20,ffff8000294f02e0) at ktrsyscall+0x2d0 ktrwrite sys/kern/kern_ktrace.c:609 [inline] ktrsyscall(ffff80002120e548,b,20,ffff8000294f02e0) at ktrsyscall+0x2d0 sys/kern/kern_ktrace.c:185 syscall(ffff8000294f03b0) at syscall+0x356 mi_syscall sys/sys/syscall_mi.h:76 [inline] syscall(ffff8000294f03b0) at syscall+0x356 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7fffff3900, count: 8 https://www.openbsd.org/ddb.html describes the minimum info required in bug reports. Insufficient info makes it difficult to find and fix bugs. ddb{1}> ddb{1}> set $lines = 0 ddb{1}> set $maxwidth = 0 ddb{1}> show panic *cpu1: uvm_fault(0xffffffff82afb430, 0xffff80001f2ef040, 0, 2) -> d ddb{1}> trace memset() at memset+0x4e ffs_write(ffff8000294f0090) at ffs_write+0x924 VOP_WRITE(fffffd805fadf2e0,ffff8000294f0148,3,fffffd807f7d88a0) at VOP_WRITE+0xbf sys/kern/vfs_vops.c:245 ktrwriteraw(ffff80002120e548,fffffd805fadf2e0,fffffd807f7d88a0,ffff8000294f0218,ffff8000294f01f0) at ktrwriteraw+0x15f sys/kern/kern_ktrace.c:666 ktrsyscall(ffff80002120e548,b,20,ffff8000294f02e0) at ktrsyscall+0x2d0 ktrwrite sys/kern/kern_ktrace.c:609 [inline] ktrsyscall(ffff80002120e548,b,20,ffff8000294f02e0) at ktrsyscall+0x2d0 sys/kern/kern_ktrace.c:185 syscall(ffff8000294f03b0) at syscall+0x356 mi_syscall sys/sys/syscall_mi.h:76 [inline] syscall(ffff8000294f03b0) at syscall+0x356 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7fffff3900, count: -7 ddb{1}> show registers rdi 0xffff80001f2ef040 rsi 0 rbp 0xffff8000294effb0 rbx 0x1 rdx 0 rcx 0xf8 rax 0 r8 0x7c0 r9 0xffff8000294eff08 r10 0x6fa18338d0f4fdf0 r11 0xffff80001f2ef040 r12 0x40 r13 0xfffffd806e972bd8 r14 0x800 r15 0xfffffd806e972bc0 rip 0xffffffff81b15f9e memset+0x4e cs 0x8 rflags 0x10202 __ALIGN_SIZE+0xf202 rsp 0xffff8000294efdb8 ss 0x10 memset+0x4e: repe stosq %es:(%rdi) ddb{1}> show proc PROC (syz-executor.3) pid=72897 stat=onproc flags process=2 proc=1 pri=32, usrpri=82, nice=20 forw=0xffffffffffffffff, list=0xffff8000211567e0,0xffff8000211fc550 process=0xffff8000244b0c98 user=0xffff8000294eb000, vmspace=0xfffffd806a83fa20 estcpu=36, cpticks=2, pctcpu=0.4 user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 94515 188386 90149 0 2 0 syz-executor.6 7884 428702 67002 0 2 0 syz-executor.1 14899 342068 89149 0 2 0 syz-executor.2 66268 405991 26839 0 2 0 syz-executor.3 66268 508487 26839 0 3 0x4000080 fsleep syz-executor.3 8682 113176 69318 0 2 0 syz-executor.7 85043 517623 92727 0 2 0 syz-executor.0 85043 237335 92727 0 3 0x4000080 fsleep syz-executor.0 85043 99686 92727 0 3 0x4000080 fsleep syz-executor.0 92727 247955 77938 0 7 0x2 syz-executor.0 52801 272150 77938 0 2 0x2 syz-executor.5 21552 28880 1 0 3 0x100083 ttyin getty 67002 220398 77938 0 3 0x82 nanoslp syz-executor.1 90149 338811 77938 0 2 0x2 syz-executor.6 46537 437261 77938 0 3 0x2 biowait syz-executor.4 *26839 72897 77938 0 7 0x3 syz-executor.3 10319 377048 0 0 3 0x14200 bored sosplice 89149 170494 77938 0 3 0x82 nanoslp syz-executor.2 69318 414039 77938 0 2 0x482 syz-executor.7 77938 452960 39339 0 3 0x82 thrsleep syz-fuzzer 77938 387633 39339 0 2 0x4000482 syz-fuzzer 77938 350833 39339 0 3 0x4000082 kqread syz-fuzzer 77938 427899 39339 0 3 0x4000082 thrsleep syz-fuzzer 77938 118744 39339 0 3 0x4000082 thrsleep syz-fuzzer 77938 214541 39339 0 3 0x4000082 thrsleep syz-fuzzer 77938 108409 39339 0 3 0x4000082 nanoslp syz-fuzzer 77938 50261 39339 0 3 0x4000082 thrsleep syz-fuzzer 77938 61048 39339 0 3 0x4000082 thrsleep syz-fuzzer 77938 223377 39339 0 3 0x4000082 thrsleep syz-fuzzer 39339 317666 82214 0 3 0x10008a sigsusp ksh 82214 376810 8819 0 3 0x9a poll sshd 8819 68120 1 0 3 0x88 poll sshd 53886 392222 16117 74 3 0x100092 bpf pflogd 16117 418522 1 0 3 0x80 netio pflogd 70842 445089 5232 73 3 0x100090 kqread syslogd 5232 328805 1 0 3 0x100082 netio syslogd 99680 517819 1 0 3 0x100080 kqread resolvd 26180 140176 41858 77 3 0x100092 kqread dhcpleased 90850 316917 41858 77 3 0x100092 kqread dhcpleased 41858 366536 1 0 3 0x80 kqread dhcpleased 4167 356779 0 0 3 0x14200 bored smr 15481 55973 0 0 2 0x14200 zerothread 19893 84588 0 0 3 0x14200 aiodoned aiodoned 78355 244362 0 0 3 0x14200 syncer update 45030 123118 0 0 3 0x14200 cleaner cleaner 51065 118932 0 0 3 0x14200 reaper reaper 6637 323846 0 0 3 0x14200 pgdaemon pagedaemon 91551 119064 0 0 3 0x14200 bored viomb 64573 288127 0 0 3 0x40014200 acpi0 acpi0 86675 401694 0 0 3 0x40014200 idle1 44217 338667 0 0 3 0x14200 bored softnet 89509 279594 0 0 3 0x14200 bored systqmp 81137 206883 0 0 3 0x14200 bored systq 5624 320080 0 0 3 0x40014200 bored softclock 2 165509 0 0 3 0x40014200 idle0 1 259073 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 46537 (syz-executor.4) thread 0xffff8000211fc540 (437261) exclusive rrwlock inode r = 0 (0xfffffd806ed091b8) #0 witness_lock+0x44d #1 rw_enter+0x3e1 sys/kern/kern_rwlock.c:310 #2 rrw_enter+0x8b sys/kern/kern_rwlock.c:461 #3 VOP_LOCK+0x87 sys/kern/vfs_vops.c:534 #4 ufs_ihashins+0x42 sys/ufs/ufs/ufs_ihash.c:140 #5 ffs_vget+0x141 sys/ufs/ffs/ffs_vfsops.c:1347 #6 ffs_inode_alloc+0x1be sys/ufs/ffs/ffs_alloc.c:394 #7 ufs_mkdir+0xf4 sys/ufs/ufs/ufs_vnops.c:1162 #8 VOP_MKDIR+0xbf sys/kern/vfs_vops.c:404 #9 domkdirat+0x121 sys/kern/vfs_syscalls.c:3100 #10 syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] #10 syscall+0x489 sys/arch/amd64/amd64/trap.c:585 #11 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd807eae8920) #0 witness_lock+0x44d #1 rw_enter+0x3e1 sys/kern/kern_rwlock.c:310 #2 rrw_enter+0x8b sys/kern/kern_rwlock.c:461 #3 VOP_LOCK+0x87 sys/kern/vfs_vops.c:534 #4 vn_lock+0x84 sys/kern/vfs_vnops.c:579 #5 vfs_lookup+0xd1 sys/kern/vfs_lookup.c:413 #6 namei+0x36a sys/kern/vfs_lookup.c:245 #7 domkdirat+0x75 sys/kern/vfs_syscalls.c:3085 #8 syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] #8 syscall+0x489 sys/arch/amd64/amd64/trap.c:585 #9 Xsyscall+0x128 Process 26839 (syz-executor.3) thread 0xffff80002120e548 (72897) exclusive rrwlock inode r = 0 (0xfffffd806e972c58) #0 witness_lock+0x44d #1 rw_enter+0x3e1 sys/kern/kern_rwlock.c:310 #2 rrw_enter+0x8b sys/kern/kern_rwlock.c:461 #3 VOP_LOCK+0x87 sys/kern/vfs_vops.c:534 #4 vn_lock+0x84 sys/kern/vfs_vnops.c:579 #5 vget+0x1d3 sys/kern/vfs_subr.c:677 #6 ktrwriteraw+0x130 sys/kern/kern_ktrace.c:663 #7 ktrsyscall+0x2d0 ktrwrite sys/kern/kern_ktrace.c:609 [inline] #7 ktrsyscall+0x2d0 sys/kern/kern_ktrace.c:185 #8 syscall+0x356 mi_syscall sys/sys/syscall_mi.h:76 [inline] #8 syscall+0x356 sys/arch/amd64/amd64/trap.c:585 #9 Xsyscall+0x128 exclusive kernel_lock &kernel_lock r = 1 (0xffffffff82aeba28) #0 witness_lock+0x44d #1 syscall+0x33d mi_syscall sys/sys/syscall_mi.h:74 [inline] #1 syscall+0x33d sys/arch/amd64/amd64/trap.c:585 #2 Xsyscall+0x128 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10191 6569K 7133K 78643K 18060 0 pcb 13 8K 8K 78643K 398 0 rtable 229 10K 12K 78643K 1635 0 ifaddr 93 21K 22K 78643K 629 0 sysctl 3 1K 2K 78643K 7 0 counters 54 35K 36K 78643K 198 0 ioctlops 0 0K 4K 78643K 1900 0 iov 0 0K 24K 78643K 124 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 4 0 vnodes 1279 80K 80K 78643K 3591 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 9K 78643K 43 0 VM map 2 1K 1K 78643K 2 0 sem 12 1K 1K 78643K 96 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12598 0 file desc 16 57K 89K 78643K 6924 0 sigio 0 0K 0K 78643K 32 0 proc 75 87K 123K 78643K 1245 0 subproc 104 6K 6K 78643K 312 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 478 0 in_multi 88 5K 7K 78643K 498 0 ether_multi 1 0K 0K 78643K 90 0 mrt 1 0K 0K 78643K 95 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 85 387K 387K 78643K 85 0 exec 0 0K 2K 78643K 1229 0 pfkey data 0 0K 0K 78643K 4 0 tdb 3 0K 0K 78643K 3 0 pagedep 1 8K 8K 78643K 1 0 inodedep 1 32K 32K 78643K 1 0 newblk 1 0K 0K 78643K 1 0 VM swap 7 26K 26K 78643K 7 0 UVM amap 336 165K 166K 78643K 82460 0 UVM aobj 75 3K 3K 78643K 137 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 306 0 NDP 12 0K 2K 78643K 141 0 temp 142 4705K 4789K 78643K 61667 0 kqueue 10 14K 30K 78643K 328 0 SYN cache 2 16K 16K 78643K 2 0 ddb{1}> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle plcache 128 22 0 0 1 0 1 1 0 8 0 rtpcb 120 171 0 168 1 0 1 1 0 8 0 rtentry 112 372 0 277 4 0 4 4 0 8 0 unpcb 136 1392 0 1377 3 2 1 2 0 8 0 syncache 296 68 0 68 10 9 1 1 0 8 1 tcpqe 32 13 0 13 5 4 1 1 0 8 1 tcpcb 736 1045 0 1037 14 12 2 4 0 8 0 arp 120 65 0 49 1 0 1 1 0 8 0 inpcb 304 2854 0 2846 10 9 1 2 0 8 0 rttmr 72 20 0 20 4 4 0 1 0 8 0 ip6q 72 4 0 4 1 1 0 1 0 8 0 ip6af 40 12 0 12 1 1 0 1 0 8 0 nd6 48 83 0 61 1 0 1 1 0 8 0 pkpcb 40 11 0 11 3 2 1 1 0 8 1 kcovpl 48 24 0 16 1 0 1 1 0 8 0 ppxss 1248 11 0 11 4 4 0 1 0 8 0 pfstscr 40 33 0 31 4 3 1 1 0 8 0 pffrag 232 22 0 19 2 1 1 1 0 482 0 pffrnode 88 22 0 19 2 1 1 1 0 8 0 pffrent 40 251 0 248 2 1 1 1 0 8 0 pfosfp 40 1429 0 1429 5 5 0 5 0 8 0 pfosfpen 112 1429 0 1429 21 21 0 21 0 8 0 pfrke_plain 168 24 0 24 3 3 0 1 0 8 0 pfrktable 1344 222 0 217 2 1 1 1 0 8 0 pftag 88 17 0 13 1 0 1 1 0 8 0 pfstitem 24 31 0 27 1 0 1 1 0 8 0 pfstkey 112 87 0 83 1 0 1 1 0 8 0 pfstate 320 51 0 48 2 1 1 2 0 8 0 pfrule 1360 152 0 117 3 0 3 3 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 1303 0 873 34 7 27 30 0 8 0 art_table 32 1304 0 873 4 0 4 4 0 8 0 art_node 16 371 0 289 1 0 1 1 0 8 0 sysvmsgpl 40 30 0 20 1 0 1 1 0 8 0 semupl 112 7 0 7 2 2 0 1 0 8 0 semapl 112 88 0 78 1 0 1 1 0 8 0 shmpl 112 134 0 62 5 2 3 3 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 9840 0 8392 91 0 91 91 0 8 0 ffsino 272 9840 0 8392 97 0 97 97 0 8 0 nchpl 144 17881 0 16258 63 0 63 63 0 8 0 rtmask 32 48 0 48 3 3 0 1 0 8 0 uvmvnodes 80 5926 0 0 121 0 121 121 0 8 0 vnodes 224 5926 0 0 349 0 349 349 0 8 0 namei 1024 46887 0 46886 3 2 1 2 0 8 0 percpumem 16 111 0 72 1 0 1 1 0 8 0 vcpupl 2048 6 0 0 1 0 1 1 0 8 0 vmpool 560 7 0 1 2 1 1 1 0 8 0 pfiaddrpl 120 70 0 65 2 1 1 1 0 8 0 scsiplug 72 5 0 5 1 0 1 1 0 8 1 scxspl 216 53219 0 53218 17 16 1 8 0 8 0 plimitpl 152 298 0 282 1 0 1 1 0 8 0 sigapl 424 7206 0 7162 7 1 6 6 0 8 0 futexpl 64 38436 0 38433 1 0 1 1 0 8 0 knotepl 112 147 0 0 4 0 4 4 0 8 0 kqueuepl 216 508 0 502 1 0 1 1 0 8 0 pipepl 336 367 0 339 3 0 3 3 0 8 0 fdescpl 496 7191 0 7162 6 2 4 5 0 8 0 filepl 152 20337 0 20093 14 4 10 11 0 8 0 lockfpl 104 847 0 844 1 0 1 1 0 8 0 lockfspl 48 335 0 332 1 0 1 1 0 8 0 sessionpl 144 42 0 25 1 0 1 1 0 8 0 pgrppl 48 54 0 37 1 0 1 1 0 8 0 ucredpl 96 2943 0 2930 1 0 1 1 0 8 0 zombiepl 144 7162 0 7162 1 0 1 1 0 8 1 processpl 1064 7206 0 7162 5 1 4 4 0 8 0 procpl 672 14629 0 14573 7 1 6 6 0 8 0 srpgc 96 12 0 12 3 3 0 1 0 8 0 sosppl 168 61 0 61 4 3 1 1 0 8 1 sockpl 480 4437 0 4411 20 15 5 8 0 8 1 mcl64k 65536 18 0 0 3 0 3 3 0 8 0 mcl16k 16384 11 0 0 2 0 2 2 0 8 0 mcl12k 12288 18 0 0 2 0 2 2 0 8 0 mcl9k 9216 9 0 0 1 0 1 1 0 8 0 mcl8k 8192 25 0 0 4 1 3 3 0 8 0 mcl4k 4096 17 0 0 3 0 3 3 0 8 0 mcl2k2 2112 3 0 0 1 0 1 1 0 8 0 mcl2k 2048 263 0 0 17 0 17 17 0 8 0 mtagpl 96 527 0 0 13 0 13 13 0 8 0 mbufpl 256 1387 0 0 80 0 80 80 0 8 0 bufpl 288 12993 0 6657 453 0 453 453 0 8 0 anonpl 24 1846093 0 1834809 184 99 85 99 0 186 7 amapchunkpl 152 198702 0 198102 60 31 29 46 0 158 0 amappl16 200 19167 0 18872 92 73 19 28 0 8 0 amappl15 192 1495 0 1489 1 0 1 1 0 8 0 amappl14 184 241 0 235 1 0 1 1 0 8 0 amappl13 176 1221 0 1217 1 0 1 1 0 8 0 amappl12 168 900 0 887 1 0 1 1 0 8 0 amappl11 160 618 0 601 1 0 1 1 0 8 0 amappl10 152 1116 0 1104 1 0 1 1 0 8 0 amappl9 144 1667 0 1660 1 0 1 1 0 8 0 amappl8 136 1535 0 1432 4 0 4 4 0 8 0 amappl7 128 682 0 671 1 0 1 1 0 8 0 amappl6 120 1483 0 1452 3 2 1 2 0 8 0 amappl5 112 5732 0 5712 1 0 1 1 0 8 0 amappl4 104 2200 0 2168 2 0 2 2 0 8 0 amappl3 96 2237 0 2223 1 0 1 1 0 8 0 amappl2 88 2689 0 2638 3 1 2 3 0 8 0 amappl1 80 120309 0 119762 22 9 13 19 0 8 0 amappl 88 81562 0 81343 7 0 7 7 0 92 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 7 0 7 1 1 0 1 0 8 0 dma16 16 18 0 17 1 0 1 1 0 8 0 aobjpl 72 136 0 62 2 0 2 2 0 8 0 uaddrrnd 24 7198 0 7163 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 7198 0 7163 1 0 1 1 0 8 0 vmmpekpl 168 39440 0 39376 4 0 4 4 0 8 0 vmmpepl 168 628867 0 626630 174 63 111 121 0 357 2 vmsppl 368 7197 0 7163 5 1 4 4 0 8 0 rwobjpl 56 145248 0 137955 116 9 107 107 0 8 0 pdppl 4096 14403 0 14332 246 171 75 81 0 8 4 pvpl 32 3482966 0 3467844 338 184 154 241 0 265 10 pmappl 248 7197 0 7163 6 3 3 3 0 8 0 extentpl 40 57 0 38 1 0 1 1 0 8 0 phpool 112 1066 0 196 25 0 25 25 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp x86_ipi_db(ffffffff82978ff0) at x86_ipi_db+0x1a sys/arch/amd64/amd64/db_interface.c:393 x86_ipi_handler() at x86_ipi_handler+0xb7 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x23 __mp_lock(ffffffff82aeb820) at __mp_lock+0x122 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff82aeb820) at __mp_lock+0x122 sys/kern/kern_lock.c:147 intr_handler(ffff8000294d3f20,ffff80000004ad00) at intr_handler+0x5e sys/arch/amd64/amd64/intr.c:532 Xintr_ioapic_edge21_untramp() at Xintr_ioapic_edge21_untramp+0x18f __mp_lock(ffffffff82aeb820) at __mp_lock+0x129 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff82aeb820) at __mp_lock+0x129 sys/kern/kern_lock.c:147 syscall(ffff8000294d40f0) at syscall+0x33d mi_syscall sys/sys/syscall_mi.h:74 [inline] syscall(ffff8000294d40f0) at syscall+0x33d sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7fffffafc0, count: 6 ddb{0}> trace x86_ipi_db(ffffffff82978ff0) at x86_ipi_db+0x1a sys/arch/amd64/amd64/db_interface.c:393 x86_ipi_handler() at x86_ipi_handler+0xb7 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x23 __mp_lock(ffffffff82aeb820) at __mp_lock+0x122 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff82aeb820) at __mp_lock+0x122 sys/kern/kern_lock.c:147 intr_handler(ffff8000294d3f20,ffff80000004ad00) at intr_handler+0x5e sys/arch/amd64/amd64/intr.c:532 Xintr_ioapic_edge21_untramp() at Xintr_ioapic_edge21_untramp+0x18f __mp_lock(ffffffff82aeb820) at __mp_lock+0x129 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff82aeb820) at __mp_lock+0x129 sys/kern/kern_lock.c:147 syscall(ffff8000294d40f0) at syscall+0x33d mi_syscall sys/sys/syscall_mi.h:74 [inline] syscall(ffff8000294d40f0) at syscall+0x33d sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7fffffafc0, count: -9 ddb{0}> machine ddbcpu 1 Stopped at memset+0x4e: repe stosq %es:(%rdi) memset() at memset+0x4e ffs_write(ffff8000294f0090) at ffs_write+0x924 VOP_WRITE(fffffd805fadf2e0,ffff8000294f0148,3,fffffd807f7d88a0) at VOP_WRITE+0xbf sys/kern/vfs_vops.c:245 ktrwriteraw(ffff80002120e548,fffffd805fadf2e0,fffffd807f7d88a0,ffff8000294f0218,ffff8000294f01f0) at ktrwriteraw+0x15f sys/kern/kern_ktrace.c:666 ktrsyscall(ffff80002120e548,b,20,ffff8000294f02e0) at ktrsyscall+0x2d0 ktrwrite sys/kern/kern_ktrace.c:609 [inline] ktrsyscall(ffff80002120e548,b,20,ffff8000294f02e0) at ktrsyscall+0x2d0 sys/kern/kern_ktrace.c:185 syscall(ffff8000294f03b0) at syscall+0x356 mi_syscall sys/sys/syscall_mi.h:76 [inline] syscall(ffff8000294f03b0) at syscall+0x356 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7fffff3900, count: 8 ddb{1}> trace memset() at memset+0x4e ffs_write(ffff8000294f0090) at ffs_write+0x924 VOP_WRITE(fffffd805fadf2e0,ffff8000294f0148,3,fffffd807f7d88a0) at VOP_WRITE+0xbf sys/kern/vfs_vops.c:245 ktrwriteraw(ffff80002120e548,fffffd805fadf2e0,fffffd807f7d88a0,ffff8000294f0218,ffff8000294f01f0) at ktrwriteraw+0x15f sys/kern/kern_ktrace.c:666 ktrsyscall(ffff80002120e548,b,20,ffff8000294f02e0) at ktrsyscall+0x2d0 ktrwrite sys/kern/kern_ktrace.c:609 [inline] ktrsyscall(ffff80002120e548,b,20,ffff8000294f02e0) at ktrsyscall+0x2d0 sys/kern/kern_ktrace.c:185 syscall(ffff8000294f03b0) at syscall+0x356 mi_syscall sys/sys/syscall_mi.h:76 [inline] syscall(ffff8000294f03b0) at syscall+0x356 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7fffff3900, count: -7