uvm_fault(0xffffffff839367d8, 0xffff800026a13f97, 0, 2) -> d kernel: page fault trap, code=2 Stopped at memset+0x49: repe stosb %es:(%rdi) TID PID UID PRFLAGS PFLAGS CPU COMMAND 129997 108 0 0 0 0 syz-executor *520847 53745 0 0x2 0x1 1K syz-executor memset() at memset+0x49 ffs_write(ffff80002a438610) at ffs_write+0xbab sys/ufs/ffs/ffs_vnops.c:401 VOP_WRITE(fffffd805f58d438,ffff80002a4386c8,3,fffffd807f7d2680) at VOP_WRITE+0x102 sys/kern/vfs_vops.c:245 ktrwriteraw(ffff80002a391c48,fffffd805f58d438,fffffd807f7d2680,ffff80002a438790,ffff80002a438770) at ktrwriteraw+0x1bc sys/kern/kern_ktrace.c:691 ktrsysret(ffff80002a391c48,a,0,ffff80002a438860) at ktrsysret+0x19d ktrwrite2 sys/kern/kern_ktrace.c:-1 [inline] ktrsysret(ffff80002a391c48,a,0,ffff80002a438860) at ktrsysret+0x19d sys/kern/kern_ktrace.c:209 syscall(ffff80002a438910) at syscall+0xa43 mi_syscall_return sys/sys/syscall_mi.h:204 [inline] syscall(ffff80002a438910) at syscall+0xa43 sys/arch/amd64/amd64/trap.c:598 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f6583856170, 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(0xffffffff839367d8, 0xffff800026a13f97, 0, 2) -> d ddb{1}> trace memset() at memset+0x49 ffs_write(ffff80002a438610) at ffs_write+0xbab sys/ufs/ffs/ffs_vnops.c:401 VOP_WRITE(fffffd805f58d438,ffff80002a4386c8,3,fffffd807f7d2680) at VOP_WRITE+0x102 sys/kern/vfs_vops.c:245 ktrwriteraw(ffff80002a391c48,fffffd805f58d438,fffffd807f7d2680,ffff80002a438790,ffff80002a438770) at ktrwriteraw+0x1bc sys/kern/kern_ktrace.c:691 ktrsysret(ffff80002a391c48,a,0,ffff80002a438860) at ktrsysret+0x19d ktrwrite2 sys/kern/kern_ktrace.c:-1 [inline] ktrsysret(ffff80002a391c48,a,0,ffff80002a438860) at ktrsysret+0x19d sys/kern/kern_ktrace.c:209 syscall(ffff80002a438910) at syscall+0xa43 mi_syscall_return sys/sys/syscall_mi.h:204 [inline] syscall(ffff80002a438910) at syscall+0xa43 sys/arch/amd64/amd64/trap.c:598 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f6583856170, count: -7 ddb{1}> show registers rdi 0xffff800026a13f97 rsi 0 rbp 0xffff80002a438530 rbx 0x59f97 acpi_pdirpa+0x45e08 rdx 0x1 rcx 0x1 rax 0 r8 0x2068 __ALIGN_SIZE+0x1068 r9 0xffff80002a438490 r10 0x92352eada92e66c4 r11 0xffff800026a13f97 r12 0x4000 __ALIGN_SIZE+0x3000 r13 0x1f97 __ALIGN_SIZE+0xf97 r14 0xfffffd805f58d438 r15 0x1 rip 0xffffffff82455fc9 memset+0x49 cs 0x8 rflags 0x10202 __ALIGN_SIZE+0xf202 rsp 0xffff80002a438328 ss 0x10 memset+0x49: repe stosb %es:(%rdi) ddb{1}> show proc PROC (syz-executor) tid=520847 pid=53745 tcnt=1 stat=onproc flags process=2 proc=1 runpri=17, usrpri=86, slppri=17, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80002a390f78,0xffff80002a2f9208 process=0xffff80002a302030 user=0xffff80002a433000, vmspace=0xfffffd806ec6cab8 estcpu=36, cpticks=6, pctcpu=0.34, user=6, sys=126, intr=2 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 108 129997 74524 0 7 0 syz-executor 97653 281041 80379 0 2 0 syz-executor 97653 447020 80379 0 3 0x4000080 fsleep syz-executor 3549 131928 14946 0 2 0 syz-executor 3549 508616 14946 0 2 0x4000000 syz-executor 80279 415737 81087 0 3 0x80 nanoslp syz-executor 80279 29283 81087 0 3 0x4000080 pipewr syz-executor 80279 428134 81087 0 3 0x4000080 fsleep syz-executor 49964 5074 0 0 3 0x14200 acct acct 36931 214204 87936 0 2 0x482 syz-executor 77107 439089 1 0 3 0x100083 ttyin getty 5133 290376 0 0 3 0x14200 bored sosplice 61720 505643 0 0 3 0x14280 nfsidl nfsio 17515 71969 0 0 3 0x14280 nfsidl nfsio 66938 76204 0 0 3 0x14280 nfsidl nfsio 97681 480352 0 0 3 0x14280 nfsidl nfsio 72613 171234 0 0 3 0x14280 nfsidl nfsio 44231 521053 0 0 3 0x14280 nfsidl nfsio 13475 409368 0 0 3 0x14280 nfsidl nfsio 57003 207426 0 0 3 0x14280 nfsidl nfsio 49061 352675 0 0 3 0x14280 nfsidl nfsio 87734 437842 0 0 3 0x14280 nfsidl nfsio 92792 129610 0 0 3 0x14280 nfsidl nfsio 82739 197273 0 0 3 0x14280 nfsidl nfsio 11433 252058 0 0 3 0x14280 nfsidl nfsio 34883 61400 0 0 3 0x14280 nfsidl nfsio 49725 442051 0 0 3 0x14280 nfsidl nfsio 33071 436909 0 0 3 0x14280 nfsidl nfsio 45598 395907 0 0 3 0x14280 nfsidl nfsio 84278 290364 0 0 3 0x14280 nfsidl nfsio 15510 82882 0 0 3 0x14280 nfsidl nfsio 88282 351768 0 0 3 0x14280 nfsidl nfsio 17007 303343 87936 0 3 0x82 wait syz-executor 74524 231320 87936 0 2 0x2 syz-executor 14946 136869 87936 0 3 0x82 nanoslp syz-executor *53745 520847 87936 0 7 0x3 syz-executor 81087 90208 87936 0 3 0x82 nanoslp syz-executor 76827 334607 87936 0 2 0x2 syz-executor 80379 120960 87936 0 3 0x82 nanoslp syz-executor 87936 341042 65683 0 2 0x2 syz-executor 65683 97365 24433 0 3 0x10008a sigsusp ksh 24433 86554 84571 0 3 0x98 kqread sshd-session 84571 388641 99195 0 3 0x92 kqread sshd-session 99195 244448 1 0 3 0x88 kqread sshd 39985 14827 42233 74 3 0x1100092 bpf pflogd 42233 213796 1 0 3 0x80 sbwait pflogd 73743 47370 89997 73 3 0x1100090 kqread syslogd 89997 28432 1 0 3 0x100082 sbwait syslogd 84883 137976 1 0 3 0x100080 kqread resolvd 99485 267699 86825 77 3 0x100092 kqread dhcpleased 25059 297996 86825 77 3 0x100092 kqread dhcpleased 86825 433211 1 0 3 0x80 kqread dhcpleased 93822 30067 0 0 3 0x14200 bored smr 11848 461609 0 0 3 0x14200 pgzero zerothread 10606 259402 0 0 3 0x14200 aiodoned aiodoned 66970 127860 0 0 3 0x14200 syncer update 70151 78477 0 0 3 0x14200 cleaner cleaner 46278 156113 0 0 3 0x14200 reaper reaper 49252 149199 0 0 3 0x14200 pgdaemon pagedaemon 72375 220979 0 0 3 0x14200 bored viomb 13693 458773 0 0 3 0x40014200 acpi0 acpi0 43625 162172 0 0 3 0x40014200 idle1 88633 290114 0 0 3 0x14200 bored softnet3 93926 67913 0 0 3 0x14200 bored softnet2 30223 184347 0 0 3 0x14200 bored softnet1 37323 189334 0 0 3 0x14200 bored softnet0 8549 167695 0 0 3 0x14200 bored systqmp 43041 395964 0 0 3 0x14200 bored systq 94281 183628 0 0 3 0x14200 tmoslp softclockmp 11 148586 0 0 3 0x40014200 tmoslp softclock 58962 360448 0 0 3 0x40014200 idle0 1 344718 0 0 3 0x82 wait init 0 0 -1 0 3 0x10010200 scheduler swapper ddb{1}> show all locks Process 53745 (syz-executor) thread 0xffff80002a391c48 (520847) exclusive rrwlock inode r = 0 (0xfffffd806be71540) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1155 #1 rw_do_enter_write+0x3ea sys/kern/kern_rwlock.c:316 #2 rrw_enter+0xc6 sys/kern/kern_rwlock.c:616 #3 VOP_LOCK+0xa6 sys/kern/vfs_vops.c:524 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:570 #5 vget+0x2bd sys/kern/vfs_subr.c:694 #6 ktrwriteraw+0x172 sys/kern/kern_ktrace.c:688 #7 ktrsysret+0x19d ktrwrite2 sys/kern/kern_ktrace.c:-1 [inline] #7 ktrsysret+0x19d sys/kern/kern_ktrace.c:209 #8 syscall+0xa43 mi_syscall_return sys/sys/syscall_mi.h:204 [inline] #8 syscall+0xa43 sys/arch/amd64/amd64/trap.c:598 #9 Xsyscall+0x128 exclusive kernel_lock &kernel_lock r = 0 (0xffffffff839fc958) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1155 #1 ktrsysret+0xe1 ktrwrite2 sys/kern/kern_ktrace.c:-1 [inline] #1 ktrsysret+0xe1 sys/kern/kern_ktrace.c:209 #2 syscall+0xa43 mi_syscall_return sys/sys/syscall_mi.h:204 [inline] #2 syscall+0xa43 sys/arch/amd64/amd64/trap.c:598 #3 Xsyscall+0x128 Process 76827 (syz-executor) thread 0xffff80002a390a58 (334607) exclusive rrwlock inode r = 0 (0xfffffd806dd58980) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1155 #1 rw_do_enter_write+0x3ea sys/kern/kern_rwlock.c:316 #2 rrw_enter+0xc6 sys/kern/kern_rwlock.c:616 #3 VOP_LOCK+0xa6 sys/kern/vfs_vops.c:524 #4 ufs_ihashins+0x4f ufs_ihash sys/ufs/ufs/ufs_ihash.c:-1 [inline] #4 ufs_ihashins+0x4f sys/ufs/ufs/ufs_ihash.c:159 #5 ffs_vget+0x187 sys/ufs/ffs/ffs_vfsops.c:1230 #6 ufs_lookup+0x16bc sys/ufs/ufs/ufs_lookup.c:573 #7 VOP_LOOKUP+0x6e sys/kern/vfs_vops.c:85 #8 vfs_lookup+0x8fa sys/kern/vfs_lookup.c:566 #9 namei+0x7aa sys/kern/vfs_lookup.c:250 #10 dofstatat+0xe0 sys/kern/vfs_syscalls.c:2084 #11 syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline] #11 syscall+0xbc6 sys/arch/amd64/amd64/trap.c:577 #12 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd806dcea860) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1155 #1 rw_do_enter_write+0x3ea sys/kern/kern_rwlock.c:316 #2 rrw_enter+0xc6 sys/kern/kern_rwlock.c:616 #3 VOP_LOCK+0xa6 sys/kern/vfs_vops.c:524 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:570 #5 vget+0x2bd sys/kern/vfs_subr.c:694 #6 cache_lookup+0x36e sys/kern/vfs_cache.c:222 #7 ufs_lookup+0x21b 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 dofstatat+0xe0 sys/kern/vfs_syscalls.c:2084 #12 syscall+0xbc6 mi_syscall sys/sys/syscall_mi.h:176 [inline] #12 syscall+0xbc6 sys/arch/amd64/amd64/trap.c:577 #13 Xsyscall+0x128 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10232 11044K 12359K 166960K 12603 0 pcb 17 18K 20K 166960K 498 0 rtable 234 11K 11K 166960K 704 0 pf 42 19K 23K 166960K 258 0 ifaddr 42 8K 8K 166960K 141 0 ifgroup 58 2K 3K 166960K 293 0 sysctl 3 1K 1K 166960K 3 0 counters 68 36K 37K 166960K 264 0 ioctlops 0 0K 4K 166960K 1874 0 iov 0 0K 16K 166960K 102 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1457 92K 92K 166960K 2944 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 9K 166960K 12 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 1K 166960K 150 0 dirhash 12 2K 3K 166960K 54 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 16 57K 110K 166960K 2192 0 sigio 0 0K 0K 166960K 37 0 proc 73 91K 128K 166960K 804 0 subproc 72 4K 4K 166960K 81 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 372 0 in_multi 82 6K 7K 166960K 239 0 ether_multi 1 0K 0K 166960K 40 0 mrt 3 0K 0K 166960K 12 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 253 1129K 1129K 166960K 253 0 exec 0 0K 1K 166960K 762 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 0K 166960K 2 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 232 162K 173K 166960K 21099 0 UVM aobj 82 5K 5K 166960K 82 0 pinsyscall 41 82K 104K 166960K 3316 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 124 0 NDP 13 0K 2K 166960K 98 0 temp 80 8692K 8944K 166960K 74004 0 kqueue 15 24K 29K 166960K 403 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 120 245 0 241 3 2 1 3 0 8 0 rtentry 168 191 0 93 6 0 6 6 0 8 0 unpcb 144 2345 0 2326 19 13 6 6 0 8 5 syncache 336 9 0 9 4 4 0 1 0 8 0 tcpqe 32 1 0 1 1 1 0 1 0 8 0 tcpcb 808 917 0 912 21 17 4 8 0 8 3 arp 120 31 0 11 1 0 1 1 0 8 0 inpcb 376 2596 0 2585 32 23 9 15 0 8 7 nd6 136 37 0 11 2 0 2 2 0 8 1 pkpcb 40 47 0 47 4 3 1 1 0 8 1 kcovpl 48 9 0 1 1 0 1 1 0 8 0 mppekey 1024 2 0 2 1 1 0 1 0 8 0 ppxss 1168 64 0 62 2 1 1 1 0 8 0 pppxif 1480 15 0 14 3 2 1 1 0 8 0 pfstscr 40 7 0 6 1 0 1 1 0 8 0 pffrag 232 11 0 2 1 0 1 1 0 482 0 pffrnode 88 11 0 2 1 0 1 1 0 8 0 pffrent 40 81 0 72 1 0 1 1 0 8 0 pfosfp 40 1431 0 1007 5 0 5 5 0 8 0 pfosfpen 112 1431 0 714 21 0 21 21 0 8 0 pfrktable 1344 5 0 4 3 2 1 1 0 8 0 pfanchor 1288 1 0 0 1 0 1 1 0 8 0 pftag 88 4 0 0 1 0 1 1 0 8 0 pfstitem 24 153 0 39 1 0 1 1 0 8 0 pfstkey 128 159 0 46 4 0 4 4 0 8 0 pfstate 376 153 0 42 12 0 12 12 0 8 0 pfrule 1344 37 0 29 2 1 1 2 0 8 0 art_heap8 4096 3 0 0 3 0 3 3 0 8 0 art_heap4 256 712 0 310 31 4 27 30 0 8 1 art_table 32 715 0 310 4 0 4 4 0 8 0 art_node 16 176 0 95 1 0 1 1 0 8 0 sysvmsgpl 40 24 0 10 1 0 1 1 0 8 0 semupl 112 2 0 2 2 2 0 1 0 8 0 semapl 112 145 0 135 1 0 1 1 0 8 0 shmpl 112 79 0 0 3 0 3 3 0 8 0 dirhash 1024 45 0 28 3 0 3 3 0 8 0 dino2pl 256 5767 0 4265 95 0 95 95 0 8 0 ffsino 280 5767 0 4265 109 0 109 109 0 8 0 nchpl 144 8870 0 7171 64 0 64 64 0 8 0 rtmask 32 13 0 13 3 2 1 1 0 8 1 uvmvnodes 80 5926 0 0 121 0 121 121 0 8 0 vnodes 216 5926 0 0 330 0 330 330 0 8 0 namei 1024 31725 0 31724 3 2 1 2 0 8 0 percpumem 16 146 0 98 1 0 1 1 0 8 0 kstatmem 264 158 0 132 3 0 3 3 0 8 0 scsiplug 72 9 0 9 4 3 1 1 0 8 1 scxspl 216 29568 0 29568 13 10 3 8 1 8 3 plimitpl 152 526 0 509 1 0 1 1 0 8 0 sigapl 424 2503 0 2433 9 0 9 9 0 8 0 futexpl 64 31811 0 31809 2 1 1 1 0 8 0 knotepl 120 552 0 0 16 0 16 16 0 8 0 kqueuepl 216 980 0 968 12 11 1 6 0 8 0 pipepl 328 508 0 480 8 0 8 8 0 8 5 fdescpl 504 2458 0 2428 5 0 5 5 0 8 0 filepl 152 19156 0 18928 30 10 20 21 0 8 7 lockfpl 104 924 0 920 2 0 2 2 0 8 1 lockfspl 48 251 0 248 1 0 1 1 0 8 0 sessionpl 144 31 0 22 1 0 1 1 0 8 0 pgrppl 48 60 0 43 1 0 1 1 0 8 0 ucredpl 104 3717 0 3702 1 0 1 1 0 8 0 zombiepl 144 2470 0 2468 1 0 1 1 0 8 0 processpl 1176 2503 0 2433 6 0 6 6 0 8 0 procpl 656 5957 0 5883 8 0 8 8 0 8 0 srpgc 96 8 0 8 2 1 1 1 0 8 1 sosppl 168 6 0 6 2 1 1 1 0 8 1 sockpl 688 5263 0 5231 59 47 12 21 0 8 8 mcl64k 65536 7 0 0 1 0 1 1 0 8 0 mcl16k 16384 2 0 0 1 0 1 1 0 8 0 mcl12k 12288 1 0 0 1 0 1 1 0 8 0 mcl9k 9216 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 15 0 15 15 0 8 0 mcl2k2 2112 1 0 0 1 0 1 1 0 8 0 mcl2k 2048 44 0 0 5 0 5 5 0 8 0 mtagpl 96 7 0 0 1 0 1 1 0 8 0 mbufpl 256 292 0 0 17 0 17 17 0 8 0 bufpl 280 9568 0 3414 440 0 440 440 0 8 0 anonpl 24 313600 0 308192 83 24 59 63 0 184 6 amapchunkpl 152 70344 0 69822 37 7 30 31 0 158 3 amappl16 200 5776 0 5702 39 22 17 18 0 8 7 amappl15 192 3 0 3 2 2 0 1 0 8 0 amappl14 184 130 0 117 1 0 1 1 0 8 0 amappl13 176 8 0 7 3 2 1 1 0 8 0 amappl12 168 3121 0 3092 3 1 2 2 0 8 0 amappl11 160 58 0 43 1 0 1 1 0 8 0 amappl10 152 5 0 5 1 1 0 1 0 8 0 amappl9 144 266 0 265 1 0 1 1 0 8 0 amappl8 136 28 0 25 1 0 1 1 0 8 0 amappl7 128 118 0 106 1 0 1 1 0 8 0 amappl6 120 191 0 187 1 0 1 1 0 8 0 amappl5 112 122 0 112 1 0 1 1 0 8 0 amappl4 104 346 0 326 1 0 1 1 0 8 0 amappl3 96 14938 0 14840 4 0 4 4 0 8 0 amappl2 88 701 0 639 2 0 2 2 0 8 0 amappl1 80 18033 0 17431 15 0 15 15 0 8 0 amappl 88 19904 0 19747 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 dma2048 2048 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 6 0 6 1 1 0 1 0 8 0 dma32 32 7 0 7 1 1 0 1 0 8 0 dma16 16 19 0 18 1 0 1 1 0 8 0 aobjpl 72 81 0 0 2 0 2 2 0 8 0 uaddrrnd 24 2458 0 2428 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 2458 0 2428 1 0 1 1 0 8 0 vmmpekpl 168 20750 0 20702 3 0 3 3 0 8 0 vmmpepl 168 155987 0 153991 118 16 102 105 0 357 4 vmsppl 456 2457 0 2428 6 1 5 5 0 8 0 rwobjpl 64 44263 0 37285 118 0 118 118 0 8 3 pdppl 4096 4924 0 4856 119 47 72 86 0 8 4 pvpl 32 17998 0 0 146 1 145 145 0 265 0 pmappl 248 2457 0 2428 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 336 0 83 8 0 8 8 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff837b0ff0) 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(ffffffff839fc750) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:113 [inline] __mp_lock(ffffffff839fc750) at __mp_lock+0x192 sys/kern/kern_lock.c:144 softintr_dispatch(0) at softintr_dispatch+0x5b sys/arch/amd64/amd64/softintr.c:88 Xsoftclock() at Xsoftclock+0x27 __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x2c kd_curproc sys/dev/kcov.c:584 [inline] __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x2c sys/dev/kcov.c:153 __mp_lock(ffffffff839fc750) at __mp_lock+0x1a3 __mp_lock_spin sys/kern/kern_lock.c:113 [inline] __mp_lock(ffffffff839fc750) at __mp_lock+0x1a3 sys/kern/kern_lock.c:144 end trace frame: 0x0, count: 7 ddb{0}> trace x86_ipi_db(ffffffff837b0ff0) 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(ffffffff839fc750) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:113 [inline] __mp_lock(ffffffff839fc750) at __mp_lock+0x192 sys/kern/kern_lock.c:144 softintr_dispatch(0) at softintr_dispatch+0x5b sys/arch/amd64/amd64/softintr.c:88 Xsoftclock() at Xsoftclock+0x27 __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x2c kd_curproc sys/dev/kcov.c:584 [inline] __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x2c sys/dev/kcov.c:153 __mp_lock(ffffffff839fc750) at __mp_lock+0x1a3 __mp_lock_spin sys/kern/kern_lock.c:113 [inline] __mp_lock(ffffffff839fc750) at __mp_lock+0x1a3 sys/kern/kern_lock.c:144 end trace frame: 0x0, count: -8 ddb{0}> machine ddbcpu 1 Stopped at memset+0x49: repe stosb %es:(%rdi) memset() at memset+0x49 ffs_write(ffff80002a438610) at ffs_write+0xbab sys/ufs/ffs/ffs_vnops.c:401 VOP_WRITE(fffffd805f58d438,ffff80002a4386c8,3,fffffd807f7d2680) at VOP_WRITE+0x102 sys/kern/vfs_vops.c:245 ktrwriteraw(ffff80002a391c48,fffffd805f58d438,fffffd807f7d2680,ffff80002a438790,ffff80002a438770) at ktrwriteraw+0x1bc sys/kern/kern_ktrace.c:691 ktrsysret(ffff80002a391c48,a,0,ffff80002a438860) at ktrsysret+0x19d ktrwrite2 sys/kern/kern_ktrace.c:-1 [inline] ktrsysret(ffff80002a391c48,a,0,ffff80002a438860) at ktrsysret+0x19d sys/kern/kern_ktrace.c:209 syscall(ffff80002a438910) at syscall+0xa43 mi_syscall_return sys/sys/syscall_mi.h:204 [inline] syscall(ffff80002a438910) at syscall+0xa43 sys/arch/amd64/amd64/trap.c:598 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f6583856170, count: 8 ddb{1}> trace memset() at memset+0x49 ffs_write(ffff80002a438610) at ffs_write+0xbab sys/ufs/ffs/ffs_vnops.c:401 VOP_WRITE(fffffd805f58d438,ffff80002a4386c8,3,fffffd807f7d2680) at VOP_WRITE+0x102 sys/kern/vfs_vops.c:245 ktrwriteraw(ffff80002a391c48,fffffd805f58d438,fffffd807f7d2680,ffff80002a438790,ffff80002a438770) at ktrwriteraw+0x1bc sys/kern/kern_ktrace.c:691 ktrsysret(ffff80002a391c48,a,0,ffff80002a438860) at ktrsysret+0x19d ktrwrite2 sys/kern/kern_ktrace.c:-1 [inline] ktrsysret(ffff80002a391c48,a,0,ffff80002a438860) at ktrsysret+0x19d sys/kern/kern_ktrace.c:209 syscall(ffff80002a438910) at syscall+0xa43 mi_syscall_return sys/sys/syscall_mi.h:204 [inline] syscall(ffff80002a438910) at syscall+0xa43 sys/arch/amd64/amd64/trap.c:598 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f6583856170, count: -7