login: uvm_fault(0xffffffff83b11080, 0xffff800022f821c4, 0, 2) -> d kernel: page fault trap, code=2 Stopped at memset+0x49: repe stosb %es:(%rdi) TID PID UID PRFLAGS PFLAGS CPU COMMAND *469116 23819 0 0 0x1 1K syz-executor 411487 83201 0 0 0x4000001 0 syz-executor memset() at memset+0x49 ffs_write(ffff800037ba3ef0) at ffs_write+0xb9a sys/ufs/ffs/ffs_vnops.c:401 VOP_WRITE(fffffd806cbdd130,ffff800037ba3fa0,3,fffffd80097fd340) at VOP_WRITE+0x101 sys/kern/vfs_vops.c:245 ktrwriteraw(ffff80002a222010,fffffd806cbdd130,fffffd80097fd340,ffff800037ba4070,ffff800037ba4050) at ktrwriteraw+0x1be sys/kern/kern_ktrace.c:692 ktrsyscall(ffff80002a222010,31,30,ffff800037ba4200) at ktrsyscall+0x340 ktrwrite sys/kern/kern_ktrace.c:-1 [inline] ktrsyscall(ffff80002a222010,31,30,ffff800037ba4200) at ktrsyscall+0x340 sys/kern/kern_ktrace.c:183 syscall(ffff800037ba4200) at syscall+0x305 mi_syscall sys/sys/syscall_mi.h:154 [inline] syscall(ffff800037ba4200) at syscall+0x305 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x74324e47bae0, 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(0xffffffff83b11080, 0xffff800022f821c4, 0, 2) -> d ddb{1}> trace memset() at memset+0x49 ffs_write(ffff800037ba3ef0) at ffs_write+0xb9a sys/ufs/ffs/ffs_vnops.c:401 VOP_WRITE(fffffd806cbdd130,ffff800037ba3fa0,3,fffffd80097fd340) at VOP_WRITE+0x101 sys/kern/vfs_vops.c:245 ktrwriteraw(ffff80002a222010,fffffd806cbdd130,fffffd80097fd340,ffff800037ba4070,ffff800037ba4050) at ktrwriteraw+0x1be sys/kern/kern_ktrace.c:692 ktrsyscall(ffff80002a222010,31,30,ffff800037ba4200) at ktrsyscall+0x340 ktrwrite sys/kern/kern_ktrace.c:-1 [inline] ktrsyscall(ffff80002a222010,31,30,ffff800037ba4200) at ktrsyscall+0x340 sys/kern/kern_ktrace.c:183 syscall(ffff800037ba4200) at syscall+0x305 mi_syscall sys/sys/syscall_mi.h:154 [inline] syscall(ffff800037ba4200) at syscall+0x305 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x74324e47bae0, count: -7 ddb{1}> show registers rdi 0xffff800022f821c4 rsi 0 rbp 0xffff800037ba3e10 rbx 0x181c4 acpi_pdirpa+0x4035 rdx 0x4 rcx 0x4 rax 0 r8 0x638 r9 0xffff800037ba3d70 r10 0xd4ad8a8bee537784 r11 0xffff800022f821c4 r12 0x1c4 r13 0x800 r14 0xfffffd806cbdd130 r15 0x1 rip 0xffffffff81938b99 memset+0x49 cs 0x8 rflags 0x10202 __ALIGN_SIZE+0xf202 rsp 0xffff800037ba3c08 ss 0 memset+0x49: repe stosb %es:(%rdi) ddb{1}> show proc PROC (syz-executor) tid=469116 pid=23819 tcnt=3 stat=onproc flags process=0 proc=1 runpri=32, usrpri=82, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80002a223c98,0xffff80002a223248 process=0xffff8000ffff2b68 user=0xffff800037b9f000, vmspace=0xfffffd800b063988 estcpu=32, cpticks=6, pctcpu=0.0, user=5, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 46081 124796 17931 0 3 0x2 clonelk ifconfig *23819 469116 89802 0 7 0x1 syz-executor 23819 491496 89802 0 3 0x4000080 fsleep syz-executor 23819 278963 89802 0 2 0x4000000 syz-executor 83201 285703 37174 0 2 0 syz-executor 83201 411487 37174 0 7 0x4000001 syz-executor 83201 91867 37174 0 3 0x4000080 kqsel syz-executor 17931 165514 82956 0 3 0x10008a sigsusp sh 53604 362075 52395 0 2 0 syz-executor 53604 263129 52395 0 3 0x4000080 fsleep syz-executor 53604 125920 52395 0 3 0x4000080 fsleep syz-executor 82956 58250 43756 0 3 0x82 wait syz-executor 86424 179818 1 0 3 0x80 ttyopn init 18277 170701 29367 0 3 0x3000 suspend syz-executor 18277 423161 29367 0 2 0x4081000 syz-executor 6527 146386 0 0 3 0x14200 acct acct 89802 228381 43756 0 3 0x82 nanoslp syz-executor 37174 5823 43756 0 3 0x82 nanoslp syz-executor 52395 52883 43756 0 3 0x82 nanoslp syz-executor 29367 105368 43756 0 3 0x82 nanoslp syz-executor 43756 131864 1 0 3 0x82 wait syz-executor 84687 505718 0 0 3 0x14200 bored smr 77006 418186 0 0 2 0x14200 zerothread 47928 334218 0 0 3 0x14200 aiodoned aiodoned 17445 375206 0 0 3 0x14200 syncer update 22909 174664 0 0 3 0x14200 cleaner cleaner 86176 250849 0 0 3 0x14200 reaper reaper 6798 937 0 0 3 0x14200 pgdaemon pagedaemon 7803 86424 0 0 3 0x14200 bored viomb 77425 265626 0 0 3 0x40014200 acpi0 acpi0 24062 331830 0 0 3 0x40014200 idle1 87060 365331 0 0 3 0x14200 bored softnet1 82541 371088 0 0 2 0x14200 softnet0 17225 129987 0 0 3 0x14200 bored systqmp 93114 69875 0 0 3 0x14200 bored systq 10562 43697 0 0 3 0x14200 tmoslp softclockmp 65569 105465 0 0 3 0x40014200 tmoslp softclock 59505 417287 0 0 3 0x40014200 idle0 1 292385 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 23819 (syz-executor) thread 0xffff80002a222010 (469116) exclusive rrwlock inode r = 0 (0xfffffd80618a51f8) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 rw_do_enter_write+0x419 sys/kern/kern_rwlock.c:320 #2 rrw_enter+0xc6 sys/kern/kern_rwlock.c:621 #3 VOP_LOCK+0xbd sys/kern/vfs_vops.c:527 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:576 #5 vget+0x2a2 sys/kern/vfs_subr.c:686 #6 ktrwriteraw+0x175 sys/kern/kern_ktrace.c:689 #7 ktrsyscall+0x340 ktrwrite sys/kern/kern_ktrace.c:-1 [inline] #7 ktrsyscall+0x340 sys/kern/kern_ktrace.c:183 #8 syscall+0x305 mi_syscall sys/sys/syscall_mi.h:154 [inline] #8 syscall+0x305 sys/arch/amd64/amd64/trap.c:783 #9 Xsyscall+0x128 exclusive kernel_lock &kernel_lock r = 0 (0xffffffff83a6adc0) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 __mp_acquire_count+0x58 sys/kern/kern_lock.c:-1 #2 sleep_finish+0x2d8 sys/kern/kern_synch.c:369 #3 rw_do_enter_write+0x1dc sys/kern/kern_rwlock.c:298 #4 rrw_enter+0xc6 sys/kern/kern_rwlock.c:621 #5 VOP_LOCK+0xbd sys/kern/vfs_vops.c:527 #6 vn_lock+0xa4 sys/kern/vfs_vnops.c:576 #7 vget+0x2a2 sys/kern/vfs_subr.c:686 #8 ktrwriteraw+0x175 sys/kern/kern_ktrace.c:689 #9 ktrsyscall+0x340 ktrwrite sys/kern/kern_ktrace.c:-1 [inline] #9 ktrsyscall+0x340 sys/kern/kern_ktrace.c:183 #10 syscall+0x305 mi_syscall sys/sys/syscall_mi.h:154 [inline] #10 syscall+0x305 sys/arch/amd64/amd64/trap.c:783 #11 Xsyscall+0x128 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 11077 12023K 12510K 166960K 12940 0 pcb 17 13K 13K 166960K 125 0 rtable 207 8K 9K 166960K 464 0 pf 36 18K 25K 166960K 220 0 ifaddr 39 6K 8K 166960K 76 0 ifgroup 48 2K 2K 166960K 107 0 sysctl 3 1K 9K 166960K 7 0 counters 68 36K 37K 166960K 122 0 ioctlops 0 0K 4K 166960K 1608 0 iov 0 0K 16K 166960K 13 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1394 88K 88K 166960K 2030 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 20K 24K 166960K 13 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 34 0 dirhash 12 2K 2K 166960K 12 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 15 57K 97K 166960K 622 0 sigio 0 0K 0K 166960K 5 0 proc 19 33K 147K 166960K 680 0 subproc 72 4K 4K 166960K 99 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 38 0 in_multi 88 6K 7K 166960K 132 0 ether_multi 1 0K 0K 166960K 3 0 mrt 1 0K 0K 166960K 23 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 235 1049K 1049K 166960K 235 0 exec 0 0K 1K 166960K 473 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 118 70K 178K 166960K 7510 0 UVM aobj 84 5K 5K 166960K 88 0 pinsyscall 17 34K 107K 166960K 1896 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 19 0 NDP 11 0K 2K 166960K 52 0 temp 57 9119K 9195K 166960K 38749 0 kqueue 1 2K 32K 166960K 128 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 63 0 63 1 0 1 1 0 8 1 rtentry 176 141 0 52 6 0 6 6 0 8 0 unpcb 144 206 0 206 3 1 2 2 0 8 2 syncache 336 7 0 7 2 2 0 1 0 8 0 tcpcb 736 106 0 104 1 0 1 1 0 8 0 arp 136 22 0 6 1 0 1 1 0 8 0 ipq 40 2 0 2 1 1 0 1 0 8 0 ipqe 40 6 0 6 1 1 0 1 0 8 0 inpcb 328 728 0 725 21 12 9 9 0 8 8 nd6 152 33 0 10 2 0 2 2 0 8 0 pkpcb 40 2 0 2 1 1 0 1 0 8 0 kcovpl 48 11 0 3 1 0 1 1 0 8 0 ppxss 1192 20 0 20 2 1 1 1 0 8 1 pppxif 1576 2 0 2 1 1 0 1 0 8 0 pfstscr 40 4 0 4 1 1 0 1 0 8 0 pffrag 232 9 0 1 1 0 1 1 0 482 0 pffrnode 88 8 0 1 1 0 1 1 0 8 0 pffrent 40 11 0 3 1 0 1 1 0 8 0 pfosfp 40 1428 0 1428 5 5 0 5 0 8 0 pfosfpen 112 1428 0 1428 21 21 0 21 0 8 0 pfrktable 1344 1 0 1 1 0 1 1 0 8 1 pfanchor 1288 3 0 0 1 0 1 1 0 8 0 pftag 88 2 0 0 1 0 1 1 0 8 0 pfqueue 320 2 0 1 1 0 1 1 0 8 0 pfstitem 24 56 0 9 1 0 1 1 0 8 0 pfstkey 128 61 0 14 2 0 2 2 0 8 0 pfstate 448 59 0 12 6 0 6 6 0 8 0 pfrule 1360 50 0 44 2 0 2 2 0 8 0 rttmr 136 1 0 1 1 0 1 1 0 8 1 art_heap8 4096 2 0 0 2 0 2 2 0 8 0 art_heap4 256 607 0 222 31 2 29 31 0 8 1 art_table 40 609 0 222 5 0 5 5 0 8 0 art_node 32 141 0 61 1 0 1 1 0 8 0 sysvmsgpl 40 16 0 8 1 0 1 1 0 8 0 semupl 112 1 0 1 1 1 0 1 0 8 0 semapl 72 31 0 21 1 0 1 1 0 8 0 shmpl 112 85 0 4 3 0 3 3 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 2527 0 1047 93 0 93 93 0 8 0 ffsino 296 2527 0 1047 115 0 115 115 0 8 0 nchpl 144 3353 0 1642 64 0 64 64 0 8 0 rtmask 32 3 0 3 2 1 1 1 0 8 1 vnodes 216 3020 0 0 168 0 168 168 0 8 0 namei 1024 11688 0 11688 13 9 4 11 0 8 4 percpumem 16 76 0 27 1 0 1 1 0 8 0 kstatmem 264 65 0 40 4 1 3 3 0 8 1 scxspl 216 20581 0 20581 11 3 8 8 1 8 8 plimitpl 152 216 0 206 1 0 1 1 0 8 0 sigapl 424 951 0 916 7 0 7 7 0 8 1 knotepl 120 382 0 0 12 0 12 12 0 8 0 kqueuepl 224 169 0 167 2 1 1 2 0 8 0 pipepl 344 162 0 135 3 0 3 3 0 8 0 fdescpl 528 934 0 916 3 0 3 3 0 8 0 filepl 160 5355 0 5199 28 14 14 19 0 8 4 lockfpl 104 242 0 241 1 0 1 1 0 8 0 lockfspl 48 114 0 113 1 0 1 1 0 8 0 sessionpl 144 41 0 39 1 0 1 1 0 8 0 pgrppl 48 54 0 44 1 0 1 1 0 8 0 ucredpl 104 1059 0 1056 1 0 1 1 0 8 0 zombiepl 144 993 0 989 1 0 1 1 0 8 0 processpl 1232 951 0 916 5 1 4 5 0 8 0 procpl 664 1754 0 1712 7 1 6 6 0 8 0 sosppl 176 1 0 1 1 1 0 1 0 8 0 sockpl 752 1011 0 1008 27 18 9 14 0 8 8 mcl64k 65536 5 0 0 1 0 1 1 0 8 0 mcl16k 16384 2 0 0 1 0 1 1 0 8 0 mcl12k 12288 2 0 0 1 0 1 1 0 8 0 mcl9k128 9344 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 3 0 0 1 0 1 1 0 8 0 mcl4k 4096 131 0 0 17 0 17 17 0 8 0 mcl2k 2048 17 0 0 3 0 3 3 0 8 0 mtagpl 96 6 0 0 1 0 1 1 0 8 0 mbufpl 256 218 0 0 14 0 14 14 0 8 0 bufpl 280 9203 0 2868 454 0 454 454 0 8 0 anonpl 32 9701 0 0 79 0 79 79 0 246 0 amapchunkpl 152 24029 0 23713 38 10 28 36 0 158 13 amappl16 200 2553 0 2535 24 16 8 15 0 8 6 amappl15 192 4 0 4 1 1 0 1 0 8 0 amappl14 184 487 0 486 1 0 1 1 0 8 0 amappl13 176 137 0 137 1 0 1 1 0 8 1 amappl12 168 1202 0 1187 2 0 2 2 0 8 0 amappl11 160 31 0 31 1 1 0 1 0 8 0 amappl10 152 80 0 80 1 0 1 1 0 8 1 amappl9 144 278 0 278 1 1 0 1 0 8 0 amappl8 136 113 0 112 1 0 1 1 0 8 0 amappl7 128 165 0 163 1 0 1 1 0 8 0 amappl6 120 192 0 190 1 0 1 1 0 8 0 amappl5 112 105 0 104 1 0 1 1 0 8 0 amappl4 104 328 0 326 1 0 1 1 0 8 0 amappl3 96 4713 0 4644 4 0 4 4 0 8 2 amappl2 88 615 0 605 2 0 2 2 0 8 0 amappl1 80 13679 0 13591 17 3 14 16 0 8 7 amappl 88 6561 0 6453 5 0 5 5 0 92 0 uvmvnodes 80 117 0 0 3 0 3 3 0 8 0 dma4096 4096 2 0 2 2 2 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 21 0 20 1 0 1 1 0 8 0 aobjpl 72 87 0 4 2 0 2 2 0 8 0 uaddrrnd 24 934 0 916 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 934 0 916 1 0 1 1 0 8 0 vmmpekpl 168 9882 0 9839 3 0 3 3 0 8 0 vmmpepl 168 68686 0 67987 102 10 92 100 0 357 55 vmsppl 488 933 0 916 5 0 5 5 0 8 1 rwobjpl 80 21769 0 21283 30 3 27 29 0 8 3 pdppl 4096 1875 0 1832 121 74 47 87 0 8 4 pvpl 32 18092 0 0 146 0 146 146 0 265 0 pmappl 256 933 0 916 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 318 0 90 8 0 8 8 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff83951ff0) 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 __mp_lock(ffffffff83a6a5c0) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:142 [inline] __mp_lock(ffffffff83a6a5c0) at __mp_lock+0x192 sys/kern/kern_lock.c:173 softintr_dispatch(0) at softintr_dispatch+0x125 sys/kern/kern_softintr.c:83 dosoftint(0) at dosoftint+0x54 sys/arch/amd64/amd64/intr.c:862 Xsoftclock() at Xsoftclock+0x27 __mp_lock(ffffffff83a6a5c0) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:142 [inline] __mp_lock(ffffffff83a6a5c0) at __mp_lock+0x192 sys/kern/kern_lock.c:173 ktrsysret(ffff80002a2222a8,36,0,ffff80002a290e20) at ktrsysret+0xde ktrwrite2 sys/kern/kern_ktrace.c:-1 [inline] ktrsysret(ffff80002a2222a8,36,0,ffff80002a290e20) at ktrsysret+0xde sys/kern/kern_ktrace.c:209 syscall(ffff80002a290ed0) at syscall+0xa51 mi_syscall_return sys/sys/syscall_mi.h:204 [inline] syscall(ffff80002a290ed0) at syscall+0xa51 sys/arch/amd64/amd64/trap.c:804 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xda0b4aef90, count: 4 ddb{0}> trace x86_ipi_db(ffffffff83951ff0) 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 __mp_lock(ffffffff83a6a5c0) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:142 [inline] __mp_lock(ffffffff83a6a5c0) at __mp_lock+0x192 sys/kern/kern_lock.c:173 softintr_dispatch(0) at softintr_dispatch+0x125 sys/kern/kern_softintr.c:83 dosoftint(0) at dosoftint+0x54 sys/arch/amd64/amd64/intr.c:862 Xsoftclock() at Xsoftclock+0x27 __mp_lock(ffffffff83a6a5c0) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:142 [inline] __mp_lock(ffffffff83a6a5c0) at __mp_lock+0x192 sys/kern/kern_lock.c:173 ktrsysret(ffff80002a2222a8,36,0,ffff80002a290e20) at ktrsysret+0xde ktrwrite2 sys/kern/kern_ktrace.c:-1 [inline] ktrsysret(ffff80002a2222a8,36,0,ffff80002a290e20) at ktrsysret+0xde sys/kern/kern_ktrace.c:209 syscall(ffff80002a290ed0) at syscall+0xa51 mi_syscall_return sys/sys/syscall_mi.h:204 [inline] syscall(ffff80002a290ed0) at syscall+0xa51 sys/arch/amd64/amd64/trap.c:804 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xda0b4aef90, count: -11 ddb{0}> machine ddbcpu 1 Stopped at memset+0x49: repe stosb %es:(%rdi) memset() at memset+0x49 ffs_write(ffff800037ba3ef0) at ffs_write+0xb9a sys/ufs/ffs/ffs_vnops.c:401 VOP_WRITE(fffffd806cbdd130,ffff800037ba3fa0,3,fffffd80097fd340) at VOP_WRITE+0x101 sys/kern/vfs_vops.c:245 ktrwriteraw(ffff80002a222010,fffffd806cbdd130,fffffd80097fd340,ffff800037ba4070,ffff800037ba4050) at ktrwriteraw+0x1be sys/kern/kern_ktrace.c:692 ktrsyscall(ffff80002a222010,31,30,ffff800037ba4200) at ktrsyscall+0x340 ktrwrite sys/kern/kern_ktrace.c:-1 [inline] ktrsyscall(ffff80002a222010,31,30,ffff800037ba4200) at ktrsyscall+0x340 sys/kern/kern_ktrace.c:183 syscall(ffff800037ba4200) at syscall+0x305 mi_syscall sys/sys/syscall_mi.h:154 [inline] syscall(ffff800037ba4200) at syscall+0x305 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x74324e47bae0, count: 8 ddb{1}> trace memset() at memset+0x49 ffs_write(ffff800037ba3ef0) at ffs_write+0xb9a sys/ufs/ffs/ffs_vnops.c:401 VOP_WRITE(fffffd806cbdd130,ffff800037ba3fa0,3,fffffd80097fd340) at VOP_WRITE+0x101 sys/kern/vfs_vops.c:245 ktrwriteraw(ffff80002a222010,fffffd806cbdd130,fffffd80097fd340,ffff800037ba4070,ffff800037ba4050) at ktrwriteraw+0x1be sys/kern/kern_ktrace.c:692 ktrsyscall(ffff80002a222010,31,30,ffff800037ba4200) at ktrsyscall+0x340 ktrwrite sys/kern/kern_ktrace.c:-1 [inline] ktrsyscall(ffff80002a222010,31,30,ffff800037ba4200) at ktrsyscall+0x340 sys/kern/kern_ktrace.c:183 syscall(ffff800037ba4200) at syscall+0x305 mi_syscall sys/sys/syscall_mi.h:154 [inline] syscall(ffff800037ba4200) at syscall+0x305 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x74324e47bae0, count: -7 ddb{1}>