uvm_fault(0xffffffff836190a8, 0xffff80001f4f28b6, 0, 2) -> d kernel: page fault trap, code=2 Stopped at memset+0x49: repe stosb %es:(%rdi) TID PID UID PRFLAGS PFLAGS CPU COMMAND 163823 90428 0 0x2 0 0 syz-executor * 288 51111 73 0x1100010 0 1K syslogd memset() at memset+0x49 ffs_write(ffff80002a069c00) at ffs_write+0xbab sys/ufs/ffs/ffs_vnops.c:401 VOP_WRITE(fffffd806e27ba70,ffff80002a069e20,3,fffffd807f7d3958) at VOP_WRITE+0x102 sys/kern/vfs_vops.c:245 vn_write(fffffd806f8a41c8,ffff80002a069e20,0) at vn_write+0x1d1 sys/kern/vfs_vnops.c:408 dofilewritev(ffff8000ffffdbe8,e,ffff80002a069e20,0,ffff80002a069ee0) at dofilewritev+0x23c sys/kern/sys_generic.c:380 sys_writev(ffff8000ffffdbe8,ffff80002a069f90,ffff80002a069ee0) at sys_writev+0xd8 sys/kern/sys_generic.c:327 syscall(ffff80002a069f90) at syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:179 [inline] syscall(ffff80002a069f90) at syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7611621241b0, count: 7 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(0xffffffff836190a8, 0xffff80001f4f28b6, 0, 2) -> d ddb{1}> trace memset() at memset+0x49 ffs_write(ffff80002a069c00) at ffs_write+0xbab sys/ufs/ffs/ffs_vnops.c:401 VOP_WRITE(fffffd806e27ba70,ffff80002a069e20,3,fffffd807f7d3958) at VOP_WRITE+0x102 sys/kern/vfs_vops.c:245 vn_write(fffffd806f8a41c8,ffff80002a069e20,0) at vn_write+0x1d1 sys/kern/vfs_vnops.c:408 dofilewritev(ffff8000ffffdbe8,e,ffff80002a069e20,0,ffff80002a069ee0) at dofilewritev+0x23c sys/kern/sys_generic.c:380 sys_writev(ffff8000ffffdbe8,ffff80002a069f90,ffff80002a069ee0) at sys_writev+0xd8 sys/kern/sys_generic.c:327 syscall(ffff80002a069f90) at syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:179 [inline] syscall(ffff80002a069f90) at syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7611621241b0, count: -8 ddb{1}> show registers rdi 0xffff80001f4f28b6 rsi 0 rbp 0xffff80002a069b20 rbx 0x648b6 acpi_pdirpa+0x50727 rdx 0x2 rcx 0x2 rax 0 r8 0x3748 __ALIGN_SIZE+0x2748 r9 0xffff80002a069a80 r10 0x508661738e41e1 r11 0xffff80001f4f28b6 r12 0x4000 __ALIGN_SIZE+0x3000 r13 0x8b6 r14 0xfffffd806e27ba70 r15 0x1 rip 0xffffffff81b179c9 memset+0x49 cs 0x8 rflags 0x10206 __ALIGN_SIZE+0xf206 rsp 0xffff80002a069918 ss 0x10 memset+0x49: repe stosb %es:(%rdi) ddb{1}> show proc PROC (syslogd) tid=288 pid=51111 tcnt=1 stat=onproc flags process=1100010 proc=0 runpri=55, usrpri=55, slppri=17, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff8000ffffcf40,0xffff8000ffffc7b8 process=0xffff8000ffffa8d8 user=0xffff80002a065000, vmspace=0xfffffd806ece41c0 estcpu=5, cpticks=10, pctcpu=2.34, user=7, sys=792, intr=2 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 5009 322287 4010 0 2 0 syz-executor 5009 121627 4010 0 2 0x4000000 syz-executor 5009 122975 4010 0 3 0x4000080 fsleep syz-executor 5009 39249 4010 0 3 0x4000080 fsleep syz-executor 81934 12251 85573 0 2 0 syz-executor 81934 137600 85573 0 3 0x4000080 kqread syz-executor 81934 474785 85573 0 2 0x4000000 syz-executor 8318 167142 90428 0 2 0x480 syz-executor 8318 27177 90428 0 3 0x4000080 msgwait syz-executor 8318 376950 90428 0 3 0x4000080 fsleep syz-executor 3498 130490 91142 0 2 0x480 syz-executor 3498 183039 91142 0 3 0x4000080 sbwait syz-executor 3498 400894 91142 0 3 0x4000080 fsleep syz-executor 44319 15556 73156 0 2 0x490 syz-executor 44319 316021 73156 0 3 0x4000090 kqpoll syz-executor 44319 184635 73156 0 3 0x4000090 fsleep syz-executor 73156 52504 61228 0 3 0x82 nanoslp syz-executor 4010 486415 61228 0 2 0x482 syz-executor 51205 183114 61228 0 2 0x482 syz-executor 91317 67605 61228 0 3 0x82 nanoslp syz-executor 90428 163823 61228 0 7 0x2 syz-executor 24695 366162 0 0 3 0x14200 acct acct 85573 220758 61228 0 2 0x482 syz-executor 91142 157303 61228 0 3 0x82 nanoslp syz-executor 81436 161944 61228 0 3 0x82 nanoslp syz-executor 6380 51347 1 0 3 0x100083 ttyin getty 18692 358747 0 0 3 0x14280 nfsidl nfsio 77841 287205 0 0 3 0x14280 nfsidl nfsio 71498 360207 0 0 3 0x14280 nfsidl nfsio 91202 326970 0 0 3 0x14280 nfsidl nfsio 56924 492943 0 0 3 0x14280 nfsidl nfsio 52476 265080 0 0 3 0x14280 nfsidl nfsio 99447 523676 0 0 3 0x14280 nfsidl nfsio 90418 175164 0 0 3 0x14280 nfsidl nfsio 17868 145199 0 0 3 0x14280 nfsidl nfsio 23109 488365 0 0 3 0x14280 nfsidl nfsio 77432 193763 0 0 3 0x14280 nfsidl nfsio 40293 455803 0 0 3 0x14280 nfsidl nfsio 73656 30461 0 0 3 0x14280 nfsidl nfsio 82908 193917 0 0 3 0x14280 nfsidl nfsio 51737 284799 0 0 3 0x14280 nfsidl nfsio 41468 394138 0 0 3 0x14280 nfsidl nfsio 58089 495464 0 0 3 0x14280 nfsidl nfsio 83783 325166 0 0 3 0x14280 nfsidl nfsio 10654 3979 0 0 3 0x14280 nfsidl nfsio 49994 377840 0 0 3 0x14280 nfsidl nfsio 59154 50521 0 0 3 0x14200 bored sosplice 61228 393294 39867 0 3 0x82 kqread syz-executor 39867 51982 48867 0 3 0x10008a sigsusp ksh 48867 375795 7878 0 3 0x98 kqread sshd-session 7878 503073 43786 0 3 0x92 kqread sshd-session 43786 94860 1 0 3 0x88 kqread sshd 77347 469199 70357 74 3 0x1100092 bpf pflogd 70357 42413 1 0 3 0x80 sbwait pflogd *51111 288 7581 73 7 0x1100010 syslogd 7581 437918 1 0 3 0x100082 sbwait syslogd 31439 139189 1 0 3 0x100080 kqread resolvd 3743 444820 8916 77 3 0x100092 kqread dhcpleased 53965 280715 8916 77 3 0x100092 kqread dhcpleased 8916 230900 1 0 3 0x80 kqread dhcpleased 63230 12188 0 0 3 0x14200 bored smr 76588 77652 0 0 2 0x14200 zerothread 54375 499143 0 0 3 0x14200 aiodoned aiodoned 27958 324160 0 0 3 0x14200 syncer update 51366 369156 0 0 3 0x14200 cleaner cleaner 54872 307888 0 0 3 0x14200 reaper reaper 60688 521671 0 0 3 0x14200 pgdaemon pagedaemon 95415 231311 0 0 3 0x14200 bored viomb 46101 279476 0 0 3 0x40014200 acpi0 acpi0 32217 383186 0 0 3 0x40014200 idle1 22341 497140 0 0 3 0x14200 bored softnet3 13438 405164 0 0 3 0x14200 bored softnet2 27926 168948 0 0 3 0x14200 bored softnet1 26659 471895 0 0 3 0x14200 bored softnet0 93575 75052 0 0 3 0x14200 bored systqmp 21804 53409 0 0 3 0x14200 bored systq 13083 264391 0 0 3 0x14200 tmoslp softclockmp 85217 365134 0 0 3 0x40014200 tmoslp softclock 73190 75039 0 0 3 0x40014200 idle0 1 208100 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 5009 (syz-executor) thread 0xffff80002a052cd0 (121627) exclusive rwlock futex r = 0 (0xffffffff8344d620) #0 witness_lock+0x5b8 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5b8 sys/kern/subr_witness.c:1151 #1 sys_futex+0x69 sys/kern/sys_futex.c:98 #2 syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:179 [inline] #2 syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 #3 Xsyscall+0x128 Process 51111 (syslogd) thread 0xffff8000ffffdbe8 (288) exclusive rrwlock inode r = 0 (0xfffffd806e4ca1b0) #0 witness_lock+0x5b8 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5b8 sys/kern/subr_witness.c:1151 #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 vn_write+0x18d sys/kern/vfs_vnops.c:405 #6 dofilewritev+0x23c sys/kern/sys_generic.c:380 #7 sys_writev+0xd8 sys/kern/sys_generic.c:327 #8 syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:179 [inline] #8 syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 #9 Xsyscall+0x128 exclusive kernel_lock &kernel_lock r = 0 (0xffffffff8362f4e0) #0 witness_lock+0x5b8 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5b8 sys/kern/subr_witness.c:1151 #1 vn_write+0x4e sys/kern/vfs_vnops.c:393 #2 dofilewritev+0x23c sys/kern/sys_generic.c:380 #3 sys_writev+0xd8 sys/kern/sys_generic.c:327 #4 syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:179 [inline] #4 syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 #5 Xsyscall+0x128 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10210 10104K 10494K 166960K 12822 0 pcb 18 14K 16K 166960K 363 0 rtable 227 8K 8K 166960K 875 0 pf 35 17K 25K 166960K 131 0 ifaddr 43 7K 8K 166960K 122 0 ifgroup 55 2K 2K 166960K 157 0 sysctl 3 0K 0K 166960K 3 0 counters 64 36K 36K 166960K 122 0 ioctlops 0 0K 4K 166960K 1603 0 iov 0 0K 28K 166960K 110 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1489 94K 94K 166960K 2441 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 8 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 65 0 dirhash 12 2K 2K 166960K 27 0 ACPI 1690 195K 286K 166960K 12418 0 file desc 18 65K 97K 166960K 1153 0 sigio 0 0K 0K 166960K 18 0 proc 72 91K 128K 166960K 959 0 subproc 104 6K 6K 166960K 279 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 107 0 in_multi 99 7K 7K 166960K 263 0 ether_multi 1 0K 0K 166960K 7 0 mrt 1 0K 0K 166960K 5 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 628 0 pfkey data 0 0K 0K 166960K 4 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 267 75K 93K 166960K 11819 0 UVM aobj 18 2K 4K 166960K 24 0 pinsyscall 43 86K 104K 166960K 2609 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 1 0K 0K 166960K 75 0 NDP 12 0K 2K 166960K 84 0 temp 72 6822K 6926K 166960K 41824 0 kqueue 13 20K 29K 166960K 174 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 120 119 0 116 1 0 1 1 0 8 0 rtentry 112 292 0 189 4 0 4 4 0 8 0 unpcb 144 832 0 812 10 8 2 4 0 8 0 syncache 336 5 0 5 2 1 1 1 0 8 1 tcpqe 32 2 0 2 2 1 1 1 0 8 1 tcpcb 808 591 0 586 28 20 8 8 0 8 7 arp 120 54 0 36 1 0 1 1 0 8 0 ipq 40 1 0 1 1 1 0 1 0 8 0 ipqe 40 3 0 3 1 1 0 1 0 8 0 inpcb 336 1682 0 1668 30 23 7 13 0 8 5 nd6 136 70 0 44 2 0 2 2 0 8 0 pkpcb 40 7 0 7 4 3 1 1 0 8 1 kcovpl 48 21 0 13 1 0 1 1 0 8 0 ppxss 1168 8 0 8 3 2 1 1 0 8 1 pfstscr 40 68 0 68 1 1 0 1 0 8 0 pffrag 232 10 0 3 1 0 1 1 0 482 0 pffrnode 88 9 0 2 1 0 1 1 0 8 0 pffrent 40 13 0 6 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 4 0 4 2 2 0 1 0 8 0 pfanchor 1288 4 0 2 1 0 1 1 0 8 0 pftag 88 1 0 1 1 1 0 1 0 8 0 pfstitem 24 104 0 66 1 0 1 1 0 8 0 pfstkey 128 142 0 103 2 0 2 2 0 8 0 pfstate 376 137 0 101 6 0 6 6 0 8 0 pfrule 1344 29 0 21 2 0 2 2 0 8 0 art_heap8 4096 2 0 0 2 0 2 2 0 8 0 art_heap4 256 1135 0 678 33 4 29 29 0 8 0 art_table 32 1137 0 678 4 0 4 4 0 8 0 art_node 16 289 0 198 1 0 1 1 0 8 0 sysvmsgpl 40 9 0 7 2 1 1 1 0 8 0 semapl 112 61 0 51 1 0 1 1 0 8 0 shmpl 112 21 0 6 1 0 1 1 0 8 0 dirhash 1024 28 0 11 3 0 3 3 0 8 0 dino2pl 256 3131 0 1603 96 0 96 96 0 8 0 ffsino 272 3131 0 1603 103 0 103 103 0 8 0 nchpl 144 4524 0 2815 64 0 64 64 0 8 0 uvmvnodes 80 4023 0 0 83 0 83 83 0 8 0 vnodes 216 4023 0 0 224 0 224 224 0 8 0 namei 1024 16870 0 16870 3 2 1 2 0 8 1 percpumem 16 75 0 29 1 0 1 1 0 8 0 pfiaddrpl 120 1 0 1 1 1 0 1 0 8 0 kstatmem 264 82 0 58 2 0 2 2 0 8 0 acpiwqpl 32 2 0 2 1 0 1 1 1 8 1 scsiplug 72 4 0 4 2 2 0 1 0 8 0 scxspl 216 24192 0 24192 13 12 1 8 1 8 1 plimitpl 152 249 0 231 1 0 1 1 0 8 0 sigapl 424 1463 0 1391 9 0 9 9 0 8 0 futexpl 64 13249 0 13243 2 1 1 1 0 8 0 knotepl 120 614 0 0 17 0 17 17 0 8 0 kqueuepl 216 336 0 325 5 4 1 5 0 8 0 pipepl 320 309 0 281 3 0 3 3 0 8 0 fdescpl 496 1421 0 1389 7 2 5 6 0 8 0 filepl 152 9227 0 8963 26 12 14 16 0 8 3 lockfpl 104 363 0 360 1 0 1 1 0 8 0 lockfspl 48 134 0 131 1 0 1 1 0 8 0 sessionpl 144 37 0 28 1 0 1 1 0 8 0 pgrppl 48 75 0 58 1 0 1 1 0 8 0 ucredpl 104 1467 0 1452 1 0 1 1 0 8 0 zombiepl 144 1683 0 1680 1 0 1 1 0 8 0 processpl 1160 1463 0 1391 6 0 6 6 0 8 0 procpl 648 2926 0 2843 8 0 8 8 0 8 0 srpgc 96 2 0 2 1 1 0 1 0 8 0 sosppl 168 6 0 6 3 3 0 1 0 8 0 sockpl 664 2672 0 2635 33 23 10 15 0 8 6 mcl64k 65536 4 0 0 1 0 1 1 0 8 0 mcl16k 16384 1 0 0 1 0 1 1 0 8 0 mcl9k 9216 2 0 0 1 0 1 1 0 8 0 mcl8k 8192 5 0 0 1 0 1 1 0 8 0 mcl4k 4096 4 0 0 1 0 1 1 0 8 0 mcl2k 2048 238 0 0 30 0 30 30 0 8 0 mtagpl 96 50 0 0 2 0 2 2 0 8 0 mbufpl 256 379 0 0 22 0 22 22 0 8 0 bufpl 280 7991 0 1817 442 0 442 442 0 8 0 anonpl 24 181551 0 177777 97 23 74 96 0 185 44 amapchunkpl 152 38079 0 37235 44 11 33 41 0 158 0 amappl16 200 2495 0 2472 31 23 8 15 0 8 6 amappl15 192 4 0 4 1 1 0 1 0 8 0 amappl14 184 155 0 143 1 0 1 1 0 8 0 amappl13 176 1 0 1 1 1 0 1 0 8 0 amappl12 168 2307 0 2275 3 1 2 3 0 8 0 amappl11 160 48 0 34 1 0 1 1 0 8 0 amappl10 152 8 0 7 1 0 1 1 0 8 0 amappl9 144 229 0 229 1 1 0 1 0 8 0 amappl8 136 21 0 17 1 0 1 1 0 8 0 amappl7 128 134 0 121 1 0 1 1 0 8 0 amappl6 120 297 0 296 1 0 1 1 0 8 0 amappl5 112 188 0 175 1 0 1 1 0 8 0 amappl4 104 359 0 340 1 0 1 1 0 8 0 amappl3 96 7505 0 7371 4 0 4 4 0 8 0 amappl2 88 861 0 792 2 0 2 2 0 8 0 amappl1 80 11691 0 11117 15 1 14 14 0 8 0 amappl 88 11228 0 11024 5 0 5 5 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 10 0 10 4 4 0 1 0 8 0 dma32 32 9 0 9 3 3 0 1 0 8 0 dma16 16 18 0 17 1 0 1 1 0 8 0 aobjpl 72 23 0 6 1 0 1 1 0 8 0 uaddrrnd 24 1421 0 1389 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1421 0 1389 1 0 1 1 0 8 0 vmmpekpl 168 12428 0 12375 3 0 3 3 0 8 0 vmmpepl 168 89047 0 87099 111 19 92 95 0 357 7 vmsppl 440 1420 0 1389 5 1 4 5 0 8 0 rwobjpl 56 28505 0 23491 71 0 71 71 0 8 0 pdppl 4096 2849 0 2778 126 53 73 87 0 8 2 pvpl 32 43952 0 0 356 1 355 355 0 265 0 pmappl 248 1420 0 1389 3 0 3 3 0 8 0 extentpl 40 56 0 38 1 0 1 1 0 8 0 phpool 112 488 0 107 11 0 11 11 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff83466ff0) 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+0x2c kd_curproc sys/dev/kcov.c:589 [inline] __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x2c sys/dev/kcov.c:158 __mp_lock(ffffffff8362f2d8) at __mp_lock+0x1a3 __mp_lock_spin sys/kern/kern_lock.c:113 [inline] __mp_lock(ffffffff8362f2d8) at __mp_lock+0x1a3 sys/kern/kern_lock.c:144 syscall(ffff8000371f6a50) at syscall+0xad6 mi_syscall sys/sys/syscall_mi.h:179 [inline] syscall(ffff8000371f6a50) at syscall+0xad6 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7921bccc0560, count: 8 ddb{0}> trace x86_ipi_db(ffffffff83466ff0) 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+0x2c kd_curproc sys/dev/kcov.c:589 [inline] __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x2c sys/dev/kcov.c:158 __mp_lock(ffffffff8362f2d8) at __mp_lock+0x1a3 __mp_lock_spin sys/kern/kern_lock.c:113 [inline] __mp_lock(ffffffff8362f2d8) at __mp_lock+0x1a3 sys/kern/kern_lock.c:144 syscall(ffff8000371f6a50) at syscall+0xad6 mi_syscall sys/sys/syscall_mi.h:179 [inline] syscall(ffff8000371f6a50) at syscall+0xad6 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7921bccc0560, count: -7 ddb{0}> machine ddbcpu 1 Stopped at memset+0x49: repe stosb %es:(%rdi) memset() at memset+0x49 ffs_write(ffff80002a069c00) at ffs_write+0xbab sys/ufs/ffs/ffs_vnops.c:401 VOP_WRITE(fffffd806e27ba70,ffff80002a069e20,3,fffffd807f7d3958) at VOP_WRITE+0x102 sys/kern/vfs_vops.c:245 vn_write(fffffd806f8a41c8,ffff80002a069e20,0) at vn_write+0x1d1 sys/kern/vfs_vnops.c:408 dofilewritev(ffff8000ffffdbe8,e,ffff80002a069e20,0,ffff80002a069ee0) at dofilewritev+0x23c sys/kern/sys_generic.c:380 sys_writev(ffff8000ffffdbe8,ffff80002a069f90,ffff80002a069ee0) at sys_writev+0xd8 sys/kern/sys_generic.c:327 syscall(ffff80002a069f90) at syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:179 [inline] syscall(ffff80002a069f90) at syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7611621241b0, count: 7 ddb{1}> trace memset() at memset+0x49 ffs_write(ffff80002a069c00) at ffs_write+0xbab sys/ufs/ffs/ffs_vnops.c:401 VOP_WRITE(fffffd806e27ba70,ffff80002a069e20,3,fffffd807f7d3958) at VOP_WRITE+0x102 sys/kern/vfs_vops.c:245 vn_write(fffffd806f8a41c8,ffff80002a069e20,0) at vn_write+0x1d1 sys/kern/vfs_vnops.c:408 dofilewritev(ffff8000ffffdbe8,e,ffff80002a069e20,0,ffff80002a069ee0) at dofilewritev+0x23c sys/kern/sys_generic.c:380 sys_writev(ffff8000ffffdbe8,ffff80002a069f90,ffff80002a069ee0) at sys_writev+0xd8 sys/kern/sys_generic.c:327 syscall(ffff80002a069f90) at syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:179 [inline] syscall(ffff80002a069f90) at syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7611621241b0, count: -8