uvm_fault(0xffffffff83aad520, 0xffff80001c612748, 0, 2) -> d kernel: page fault trap, code=2 Stopped at memset+0x52: repe stosq %es:(%rdi) TID PID UID PRFLAGS PFLAGS CPU COMMAND *272740 74013 0 0x2 0x1 1K syz-executor 216482 93924 0 0x2 0x1 0 syz-executor memset() at memset+0x52 ffs_write(ffff80002a3402a0) at ffs_write+0xb9a sys/ufs/ffs/ffs_vnops.c:401 VOP_WRITE(fffffd806c115988,ffff80002a340350,3,fffffd80097fd2d8) at VOP_WRITE+0x101 sys/kern/vfs_vops.c:245 ktrwriteraw(ffff80002a220fa8,fffffd806c115988,fffffd80097fd2d8,ffff80002a340420,ffff80002a340400) at ktrwriteraw+0x1be sys/kern/kern_ktrace.c:692 ktrsysret(ffff80002a220fa8,5b,0,ffff80002a3404f0) at ktrsysret+0x192 ktrwrite2 sys/kern/kern_ktrace.c:-1 [inline] ktrsysret(ffff80002a220fa8,5b,0,ffff80002a3404f0) at ktrsysret+0x192 sys/kern/kern_ktrace.c:209 syscall(ffff80002a3405a0) at syscall+0xa51 mi_syscall_return sys/sys/syscall_mi.h:204 [inline] syscall(ffff80002a3405a0) at syscall+0xa51 sys/arch/amd64/amd64/trap.c:804 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7d905cbb31c0, 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(0xffffffff83aad520, 0xffff80001c612748, 0, 2) -> d ddb{1}> trace memset() at memset+0x52 ffs_write(ffff80002a3402a0) at ffs_write+0xb9a sys/ufs/ffs/ffs_vnops.c:401 VOP_WRITE(fffffd806c115988,ffff80002a340350,3,fffffd80097fd2d8) at VOP_WRITE+0x101 sys/kern/vfs_vops.c:245 ktrwriteraw(ffff80002a220fa8,fffffd806c115988,fffffd80097fd2d8,ffff80002a340420,ffff80002a340400) at ktrwriteraw+0x1be sys/kern/kern_ktrace.c:692 ktrsysret(ffff80002a220fa8,5b,0,ffff80002a3404f0) at ktrsysret+0x192 ktrwrite2 sys/kern/kern_ktrace.c:-1 [inline] ktrsysret(ffff80002a220fa8,5b,0,ffff80002a3404f0) at ktrsysret+0x192 sys/kern/kern_ktrace.c:209 syscall(ffff80002a3405a0) at syscall+0xa51 mi_syscall_return sys/sys/syscall_mi.h:204 [inline] syscall(ffff80002a3405a0) at syscall+0xa51 sys/arch/amd64/amd64/trap.c:804 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7d905cbb31c0, count: -7 ddb{1}> show registers rdi 0xffff80001c612748 rsi 0 rbp 0xffff80002a3401c0 rbx 0xc8748 acpi_pdirpa+0xb45b9 rdx 0 rcx 0x717 rax 0 r8 0x38b8 __ALIGN_SIZE+0x28b8 r9 0xffff80002a340120 r10 0x5e2a2caaa0d241f1 r11 0xffff80001c612748 r12 0x748 r13 0x4000 __ALIGN_SIZE+0x3000 r14 0xfffffd806c115988 r15 0x1 rip 0xffffffff81871ac2 memset+0x52 cs 0x8 rflags 0x10206 __ALIGN_SIZE+0xf206 rsp 0xffff80002a33ffb8 ss 0x10 memset+0x52: repe stosq %es:(%rdi) ddb{1}> show proc PROC (syz-executor) tid=272740 pid=74013 tcnt=1 stat=onproc flags process=2 proc=1 runpri=32, usrpri=86, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80002a221ca0,0xffff80002a220a88 process=0xffff8000ffff4008 user=0xffff80002a33b000, vmspace=0xfffffd800b063d58 estcpu=36, cpticks=13, pctcpu=0.3, user=1, sys=11, intr=1 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 75434 198384 7938 0 2 0 syz-executor 80710 55735 90339 0 2 0 syz-executor 80710 306604 90339 0 3 0x4000080 fsleep syz-executor 18641 247839 74013 0 2 0 syz-executor 18641 460202 74013 0 3 0x4000080 fsleep syz-executor 16373 183968 13693 0 2 0 syz-executor 16373 402531 13693 0 3 0x4000080 fsleep syz-executor 35188 490327 27410 0 2 0 syz-executor 35188 141536 27410 0 3 0x4000080 fsleep syz-executor 29358 78690 21888 0 3 0x80 nanoslp syz-executor 29358 198465 21888 0 3 0x4000080 bell syz-executor 29358 229704 21888 0 3 0x4000080 fsleep syz-executor 90339 289498 35621 0 2 0xc82 syz-executor 21888 134438 35621 0 2 0xc82 syz-executor *74013 272740 35621 0 7 0x3 syz-executor 27410 237115 35621 0 2 0xc82 syz-executor 93924 216482 35621 0 7 0x3 syz-executor 7938 240933 35621 0 3 0x82 nanoslp syz-executor 13693 9499 35621 0 2 0x3 syz-executor 35621 451183 92051 0 3 0x82 nanoslp syz-executor 92051 91018 20785 0 3 0x10008a sigsusp ksh 20785 165890 49319 0 3 0x98 kqread sshd-session 49319 482966 58621 0 3 0x92 kqread sshd-session 78327 143765 1 0 3 0x100083 ttyin getty 58621 373540 1 0 3 0x88 kqread sshd 49468 253195 48284 74 3 0x1100092 bpf pflogd 48284 25791 1 0 3 0x80 sbwait pflogd 8516 268524 96878 73 3 0x1100090 kqread syslogd 96878 509397 1 0 3 0x100082 sbwait syslogd 47699 124960 1 0 3 0x100080 kqread resolvd 52607 522430 88385 77 3 0x100092 kqread dhcpleased 5302 214771 88385 77 3 0x100092 kqread dhcpleased 88385 413650 1 0 3 0x80 kqread dhcpleased 73223 507666 0 0 3 0x14200 bored smr 72965 96980 0 0 2 0x14200 zerothread 18598 420883 0 0 3 0x14200 aiodoned aiodoned 36077 85477 0 0 3 0x14200 syncer update 85037 138374 0 0 3 0x14200 cleaner cleaner 97292 246752 0 0 3 0x14200 reaper reaper 7616 517175 0 0 3 0x14200 pgdaemon pagedaemon 705 318104 0 0 3 0x14200 bored viomb 95432 523908 0 0 3 0x40014200 acpi0 acpi0 57296 146377 0 0 3 0x40014200 idle1 20393 197228 0 0 3 0x14200 bored softnet1 45031 309809 0 0 3 0x14200 bored softnet0 21323 222457 0 0 3 0x14200 smrbar systqmp 72637 210819 0 0 3 0x14200 bored systq 73657 414361 0 0 3 0x14200 tmoslp softclockmp 7964 388439 0 0 3 0x40014200 tmoslp softclock 73237 293743 0 0 3 0x40014200 idle0 1 212216 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 74013 (syz-executor) thread 0xffff80002a220fa8 (272740) exclusive rrwlock inode r = 0 (0xfffffd806ede9240) #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 ktrsysret+0x192 ktrwrite2 sys/kern/kern_ktrace.c:-1 [inline] #7 ktrsysret+0x192 sys/kern/kern_ktrace.c:209 #8 syscall+0xa51 mi_syscall_return sys/sys/syscall_mi.h:204 [inline] #8 syscall+0xa51 sys/arch/amd64/amd64/trap.c:804 #9 Xsyscall+0x128 exclusive kernel_lock &kernel_lock r = 0 (0xffffffff83a9f740) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 ktrsysret+0xde ktrwrite2 sys/kern/kern_ktrace.c:-1 [inline] #1 ktrsysret+0xde sys/kern/kern_ktrace.c:209 #2 syscall+0xa51 mi_syscall_return sys/sys/syscall_mi.h:204 [inline] #2 syscall+0xa51 sys/arch/amd64/amd64/trap.c:804 #3 Xsyscall+0x128 Process 21323 (systqmp) thread 0xffff8000ffffe530 (222457) shared rwlock systqmp r = 0 (0xffffffff8394e988) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 taskq_thread+0x12a sys/kern/kern_task.c:442 #2 proc_trampoline+0x10 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 11082 12165K 12324K 166960K 12427 0 pcb 17 12K 12K 166960K 72 0 rtable 208 7K 8K 166960K 404 0 pf 37 18K 24K 166960K 97 0 ifaddr 41 7K 7K 166960K 59 0 ifgroup 56 2K 2K 166960K 82 0 sysctl 1 1K 9K 166960K 6 0 counters 72 37K 37K 166960K 98 0 ioctlops 0 0K 4K 166960K 1530 0 iov 0 0K 16K 166960K 12 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1294 81K 82K 166960K 1526 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 5 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 23 0 dirhash 12 2K 2K 166960K 12 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 16 57K 89K 166960K 343 0 sigio 0 0K 0K 166960K 1 0 proc 72 115K 164K 166960K 564 0 subproc 72 4K 4K 166960K 72 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 13 0 in_multi 88 6K 7K 166960K 111 0 ether_multi 1 0K 0K 166960K 2 0 mrt 1 0K 0K 166960K 14 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 103 466K 466K 166960K 103 0 exec 0 0K 1K 166960K 413 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 221 152K 165K 166960K 5174 0 UVM aobj 8 2K 2K 166960K 8 0 pinsyscall 41 82K 102K 166960K 1539 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 11 0 NDP 13 0K 2K 166960K 36 0 temp 41 9111K 9187K 166960K 19770 0 kqueue 13 20K 30K 166960K 70 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 57 0 54 1 0 1 1 0 8 0 rtentry 176 117 0 28 6 0 6 6 0 8 0 unpcb 144 125 0 108 2 1 1 2 0 8 0 syncache 336 4 0 4 1 1 0 1 0 8 0 tcpcb 736 53 0 49 1 0 1 1 0 8 0 arp 136 18 0 2 1 0 1 1 0 8 0 inpcb 328 225 0 218 2 1 1 2 0 8 0 nd6 152 24 0 3 1 0 1 1 0 8 0 pkpcb 40 2 0 2 1 1 0 1 0 8 0 kcovpl 48 8 0 0 1 0 1 1 0 8 0 mppekey 1024 1 0 1 1 1 0 1 0 8 0 ppxss 1192 10 0 10 1 0 1 1 0 8 1 pppxif 1576 3 0 3 1 0 1 1 0 8 1 pfstscr 40 3 0 3 2 1 1 1 0 8 1 pffrag 232 1 0 1 1 1 0 1 0 482 0 pffrnode 88 1 0 1 1 1 0 1 0 8 0 pffrent 40 3 0 3 1 1 0 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 pfanchor 1288 3 0 0 1 0 1 1 0 8 0 pfstitem 24 38 0 2 1 0 1 1 0 8 0 pfstkey 128 40 0 4 2 0 2 2 0 8 0 pfstate 448 39 0 3 5 0 5 5 0 8 0 pfrule 1360 24 0 18 2 1 1 2 0 8 0 rttmr 136 1 0 1 1 1 0 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 506 0 102 29 3 26 29 0 8 0 art_table 40 507 0 102 5 0 5 5 0 8 0 art_node 32 117 0 36 1 0 1 1 0 8 0 sysvmsgpl 40 7 0 4 1 0 1 1 0 8 0 semapl 64 21 0 11 1 0 1 1 0 8 0 shmpl 112 5 0 0 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 1960 0 496 93 0 93 93 0 8 0 ffsino 296 1960 0 496 114 0 114 114 0 8 0 nchpl 144 2444 0 744 64 0 64 64 0 8 0 rtmask 32 2 0 2 1 1 0 1 0 8 0 vnodes 216 2130 0 0 119 0 119 119 0 8 0 namei 1024 7777 0 7776 2 1 1 1 0 8 0 percpumem 16 64 0 13 1 0 1 1 0 8 0 acpiwqpl 32 1 0 1 1 0 1 1 1 8 1 kstatmem 264 45 0 14 3 0 3 3 0 8 0 scxspl 216 8423 0 8423 10 9 1 8 1 8 1 plimitpl 152 49 0 32 1 0 1 1 0 8 0 sigapl 424 672 0 626 7 1 6 7 0 8 0 knotepl 120 288 0 0 9 0 9 9 0 8 0 kqueuepl 224 93 0 83 1 0 1 1 0 8 0 pipepl 344 175 0 148 6 3 3 6 0 8 0 fdescpl 528 656 0 626 3 0 3 3 0 8 0 filepl 160 2891 0 2677 14 4 10 14 0 8 0 lockfpl 104 217 0 215 2 1 1 2 0 8 0 lockfspl 48 41 0 39 1 0 1 1 0 8 0 sessionpl 144 33 0 24 1 0 1 1 0 8 0 pgrppl 48 42 0 25 1 0 1 1 0 8 0 ucredpl 104 305 0 292 1 0 1 1 0 8 0 zombiepl 144 633 0 632 1 0 1 1 0 8 0 processpl 1232 672 0 626 5 0 5 5 0 8 0 procpl 664 1035 0 983 6 0 6 6 0 8 0 sockpl 752 414 0 387 6 2 4 5 0 8 1 mcl64k 65536 3 0 0 1 0 1 1 0 8 0 mcl8k 8192 3 0 0 1 0 1 1 0 8 0 mcl4k 4096 123 0 0 16 0 16 16 0 8 0 mcl2k 2048 19 0 0 3 0 3 3 0 8 0 mtagpl 96 2 0 0 1 0 1 1 0 8 0 mbufpl 256 163 0 0 10 0 10 10 0 8 0 bufpl 280 2858 0 110 197 0 197 197 0 8 0 anonpl 32 3831 0 0 31 0 31 31 0 246 0 amapchunkpl 152 15112 0 14548 31 6 25 26 0 158 0 amappl16 200 1687 0 1662 5 3 2 5 0 8 0 amappl15 192 7 0 7 2 2 0 1 0 8 0 amappl14 184 455 0 454 1 0 1 1 0 8 0 amappl13 176 133 0 121 1 0 1 1 0 8 0 amappl12 168 915 0 887 2 0 2 2 0 8 0 amappl11 160 20 0 20 1 1 0 1 0 8 0 amappl10 152 65 0 50 1 0 1 1 0 8 0 amappl9 144 273 0 273 1 1 0 1 0 8 0 amappl8 136 176 0 174 1 0 1 1 0 8 0 amappl7 128 150 0 136 1 0 1 1 0 8 0 amappl6 120 203 0 201 1 0 1 1 0 8 0 amappl5 112 105 0 95 1 0 1 1 0 8 0 amappl4 104 325 0 305 1 0 1 1 0 8 0 amappl3 96 2946 0 2842 5 1 4 4 0 8 0 amappl2 88 622 0 561 2 0 2 2 0 8 0 amappl1 80 11436 0 10844 14 1 13 14 0 8 0 amappl 88 4383 0 4233 5 0 5 5 0 92 0 uvmvnodes 80 109 0 0 3 0 3 3 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 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 7 0 0 1 0 1 1 0 8 0 uaddrrnd 24 656 0 626 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 656 0 626 1 0 1 1 0 8 0 vmmpekpl 168 7368 0 7329 3 1 2 3 0 8 0 vmmpepl 168 50440 0 48605 89 2 87 88 0 357 0 vmsppl 488 655 0 626 5 1 4 5 0 8 0 rwobjpl 80 16905 0 15879 23 0 23 23 0 8 0 pdppl 4096 1319 0 1252 101 30 71 83 0 8 4 pvpl 32 12124 0 0 98 0 98 98 0 265 0 pmappl 256 655 0 626 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 276 0 39 8 0 8 8 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff83984ff0) 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+0x19 kd_curproc sys/dev/kcov.c:580 [inline] __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x19 sys/dev/kcov.c:153 intr_handler(ffff80002a2e6bb0,ffff800000079600) at intr_handler+0xe9 sys/arch/amd64/amd64/intr.c:560 Xintr_ioapic_edge16_untramp() at Xintr_ioapic_edge16_untramp+0x18f __mp_lock(ffffffff83a9ef40) at __mp_lock+0x1a3 __mp_lock_spin sys/kern/kern_lock.c:142 [inline] __mp_lock(ffffffff83a9ef40) at __mp_lock+0x1a3 sys/kern/kern_lock.c:173 ktrsyscall(ffff80002a2227d8,3,18,ffff80002a2e6e60) at ktrsyscall+0x2c7 ktrwrite sys/kern/kern_ktrace.c:-1 [inline] ktrsyscall(ffff80002a2227d8,3,18,ffff80002a2e6e60) at ktrsyscall+0x2c7 sys/kern/kern_ktrace.c:183 syscall(ffff80002a2e6e60) at syscall+0x305 mi_syscall sys/sys/syscall_mi.h:154 [inline] syscall(ffff80002a2e6e60) at syscall+0x305 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7d5276731590, count: 5 ddb{0}> trace x86_ipi_db(ffffffff83984ff0) 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+0x19 kd_curproc sys/dev/kcov.c:580 [inline] __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x19 sys/dev/kcov.c:153 intr_handler(ffff80002a2e6bb0,ffff800000079600) at intr_handler+0xe9 sys/arch/amd64/amd64/intr.c:560 Xintr_ioapic_edge16_untramp() at Xintr_ioapic_edge16_untramp+0x18f __mp_lock(ffffffff83a9ef40) at __mp_lock+0x1a3 __mp_lock_spin sys/kern/kern_lock.c:142 [inline] __mp_lock(ffffffff83a9ef40) at __mp_lock+0x1a3 sys/kern/kern_lock.c:173 ktrsyscall(ffff80002a2227d8,3,18,ffff80002a2e6e60) at ktrsyscall+0x2c7 ktrwrite sys/kern/kern_ktrace.c:-1 [inline] ktrsyscall(ffff80002a2227d8,3,18,ffff80002a2e6e60) at ktrsyscall+0x2c7 sys/kern/kern_ktrace.c:183 syscall(ffff80002a2e6e60) at syscall+0x305 mi_syscall sys/sys/syscall_mi.h:154 [inline] syscall(ffff80002a2e6e60) at syscall+0x305 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7d5276731590, count: -10 ddb{0}> machine ddbcpu 1 Stopped at memset+0x52: repe stosq %es:(%rdi) memset() at memset+0x52 ffs_write(ffff80002a3402a0) at ffs_write+0xb9a sys/ufs/ffs/ffs_vnops.c:401 VOP_WRITE(fffffd806c115988,ffff80002a340350,3,fffffd80097fd2d8) at VOP_WRITE+0x101 sys/kern/vfs_vops.c:245 ktrwriteraw(ffff80002a220fa8,fffffd806c115988,fffffd80097fd2d8,ffff80002a340420,ffff80002a340400) at ktrwriteraw+0x1be sys/kern/kern_ktrace.c:692 ktrsysret(ffff80002a220fa8,5b,0,ffff80002a3404f0) at ktrsysret+0x192 ktrwrite2 sys/kern/kern_ktrace.c:-1 [inline] ktrsysret(ffff80002a220fa8,5b,0,ffff80002a3404f0) at ktrsysret+0x192 sys/kern/kern_ktrace.c:209 syscall(ffff80002a3405a0) at syscall+0xa51 mi_syscall_return sys/sys/syscall_mi.h:204 [inline] syscall(ffff80002a3405a0) at syscall+0xa51 sys/arch/amd64/amd64/trap.c:804 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7d905cbb31c0, count: 8 ddb{1}> trace memset() at memset+0x52 ffs_write(ffff80002a3402a0) at ffs_write+0xb9a sys/ufs/ffs/ffs_vnops.c:401 VOP_WRITE(fffffd806c115988,ffff80002a340350,3,fffffd80097fd2d8) at VOP_WRITE+0x101 sys/kern/vfs_vops.c:245 ktrwriteraw(ffff80002a220fa8,fffffd806c115988,fffffd80097fd2d8,ffff80002a340420,ffff80002a340400) at ktrwriteraw+0x1be sys/kern/kern_ktrace.c:692 ktrsysret(ffff80002a220fa8,5b,0,ffff80002a3404f0) at ktrsysret+0x192 ktrwrite2 sys/kern/kern_ktrace.c:-1 [inline] ktrsysret(ffff80002a220fa8,5b,0,ffff80002a3404f0) at ktrsysret+0x192 sys/kern/kern_ktrace.c:209 syscall(ffff80002a3405a0) at syscall+0xa51 mi_syscall_return sys/sys/syscall_mi.h:204 [inline] syscall(ffff80002a3405a0) at syscall+0xa51 sys/arch/amd64/amd64/trap.c:804 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7d905cbb31c0, count: -7