uvm_fault(0xffffffff83a69c28, 0xffff80001c062d01, 0, 2) -> d kernel: page fault trap, code=2 Stopped at memset+0x49: repe stosb %es:(%rdi) TID PID UID PRFLAGS PFLAGS CPU COMMAND *200076 73516 0 0x2 0x1 0 syz-executor memset() at memset+0x49 ffs_write(ffff80002a884c50) at ffs_write+0xb9a sys/ufs/ffs/ffs_vnops.c:401 VOP_WRITE(fffffd8068d590e0,ffff80002a884d00,3,fffffd8007ffd270) at VOP_WRITE+0x101 sys/kern/vfs_vops.c:245 ktrwriteraw(ffff80002a736a68,fffffd8068d590e0,fffffd8007ffd270,ffff80002a884dd0,ffff80002a884db0) at ktrwriteraw+0x19b sys/kern/kern_ktrace.c:692 ktrsyscall(ffff80002a736a68,b,20,ffff80002a884f50) at ktrsyscall+0x332 ktrwrite sys/kern/kern_ktrace.c:-1 [inline] ktrsyscall(ffff80002a736a68,b,20,ffff80002a884f50) at ktrsyscall+0x332 sys/kern/kern_ktrace.c:183 syscall(ffff80002a884f50) at syscall+0x2bc mi_syscall sys/sys/syscall_mi.h:154 [inline] syscall(ffff80002a884f50) at syscall+0x2bc sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7203b2da8a30, 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> ddb> set $lines = 0 ddb> set $maxwidth = 0 ddb> show panic *cpu0: uvm_fault(0xffffffff83a69c28, 0xffff80001c062d01, 0, 2) -> d ddb> trace memset() at memset+0x49 ffs_write(ffff80002a884c50) at ffs_write+0xb9a sys/ufs/ffs/ffs_vnops.c:401 VOP_WRITE(fffffd8068d590e0,ffff80002a884d00,3,fffffd8007ffd270) at VOP_WRITE+0x101 sys/kern/vfs_vops.c:245 ktrwriteraw(ffff80002a736a68,fffffd8068d590e0,fffffd8007ffd270,ffff80002a884dd0,ffff80002a884db0) at ktrwriteraw+0x19b sys/kern/kern_ktrace.c:692 ktrsyscall(ffff80002a736a68,b,20,ffff80002a884f50) at ktrsyscall+0x332 ktrwrite sys/kern/kern_ktrace.c:-1 [inline] ktrsyscall(ffff80002a736a68,b,20,ffff80002a884f50) at ktrsyscall+0x332 sys/kern/kern_ktrace.c:183 syscall(ffff80002a884f50) at syscall+0x2bc mi_syscall sys/sys/syscall_mi.h:154 [inline] syscall(ffff80002a884f50) at syscall+0x2bc sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7203b2da8a30, count: -7 ddb> show registers rdi 0xffff80001c062d01 rsi 0 rbp 0xffff80002a884b70 rbx 0xc8d01 acpi_pdirpa+0xb4b72 rdx 0x7 rcx 0x7 rax 0 r8 0x32f8 __ALIGN_SIZE+0x22f8 r9 0xffff80002a884ad0 r10 0x4fe82b1e2e83a04f r11 0xffff80001c062d01 r12 0xd01 r13 0x4000 __ALIGN_SIZE+0x3000 r14 0xfffffd8068d590e0 r15 0x1 rip 0xffffffff82c808a9 memset+0x49 cs 0x8 rflags 0x10202 __ALIGN_SIZE+0xf202 rsp 0xffff80002a884968 ss 0x10 memset+0x49: repe stosb %es:(%rdi) ddb> show proc PROC (syz-executor) tid=200076 pid=73516 tcnt=1 stat=onproc flags process=2 proc=1 runpri=75, usrpri=75, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80002a736d00,0xffff80002a7362b0 process=0xffff80002a79f190 user=0xffff80002a880000, vmspace=0xfffffd806f2d4458 estcpu=36, cpticks=7, pctcpu=0.0, user=1, sys=6, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 98716 182994 6598 0 2 0 syz-executor 98716 242348 6598 0 3 0x4000080 fsleep syz-executor 50842 38868 9135 0 2 0 syz-executor 50842 376963 9135 0 3 0x4000080 fsleep syz-executor 53504 510950 95814 0 2 0 syz-executor 53504 330294 95814 0 3 0x4000080 fsleep syz-executor 43759 473390 37709 0 2 0 syz-executor 43759 440175 37709 0 3 0x4000080 fsleep syz-executor 76959 130726 73516 0 2 0 syz-executor 76959 460744 73516 0 3 0x4000080 fsleep syz-executor 23071 108209 80287 0 3 0x80 nanoslp syz-executor 23071 347366 80287 0 3 0x4000080 ttyin syz-executor 23071 107597 80287 0 3 0x4000080 fsleep syz-executor 23071 103404 80287 0 3 0x4000080 fsleep syz-executor 37709 520097 81366 0 2 0xc82 syz-executor 45662 262708 1 0 3 0x100083 ttyin getty 43152 480162 0 0 3 0x14200 acct acct *73516 200076 81366 0 7 0x3 syz-executor 80287 190658 81366 0 2 0xc82 syz-executor 95814 412835 81366 0 2 0xc82 syz-executor 6598 193726 81366 0 3 0x82 nanoslp syz-executor 9135 482298 81366 0 3 0x82 nanoslp syz-executor 81366 159062 4788 0 3 0x82 wait syz-executor 4788 431919 87396 0 3 0x10008a sigsusp ksh 87396 361640 13578 0 3 0x98 kqread sshd-session 13578 73737 36429 0 3 0x92 kqread sshd-session 36429 285838 1 0 3 0x88 kqread sshd 47518 467441 95866 73 3 0x1100090 kqread syslogd 95866 196881 1 0 3 0x100082 sbwait syslogd 21408 437303 1 0 3 0x100080 kqread resolvd 97911 19603 67629 77 3 0x100092 kqread dhcpleased 16312 336551 67629 77 3 0x100092 kqread dhcpleased 67629 303371 1 0 3 0x80 kqread dhcpleased 34179 335604 0 0 3 0x14200 bored smr 92016 404805 0 0 2 0x14200 zerothread 69362 411066 0 0 3 0x14200 aiodoned aiodoned 37454 413013 0 0 3 0x14200 syncer update 86675 203758 0 0 3 0x14200 cleaner cleaner 16740 227045 0 0 3 0x14200 reaper reaper 56061 6122 0 0 3 0x14200 pgdaemon pagedaemon 11024 380435 0 0 3 0x14200 bored viomb 28448 510522 0 0 3 0x40014200 acpi0 acpi0 70668 276409 0 0 3 0x14200 bored softnet0 10129 56634 0 0 3 0x14200 bored systqmp 77418 214655 0 0 3 0x14200 bored systq 32624 340069 0 0 3 0x40014200 tmoslp softclock 64116 279707 0 0 3 0x40014200 idle0 1 287981 0 0 3 0x82 wait init 0 0 -1 0 3 0x10010200 scheduler swapper ddb> show all locks No such command ddb> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 11028 12103K 12368K 166960K 12261 0 pcb 18 12K 12K 166960K 44 0 rtable 206 7K 8K 166960K 419 0 pf 33 13K 19K 166960K 60 0 ifaddr 37 6K 7K 166960K 49 0 ifgroup 46 2K 2K 166960K 56 0 sysctl 1 1K 9K 166960K 7 0 counters 32 17K 17K 166960K 35 0 ioctlops 0 0K 4K 166960K 94 0 iov 1 4K 12K 166960K 5 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1351 85K 85K 166960K 1623 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 9K 166960K 9 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 1K 166960K 64 0 dirhash 12 2K 2K 166960K 18 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 15 53K 93K 166960K 312 0 proc 59 59K 91K 166960K 559 0 subproc 63 3K 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 25 0 in_multi 85 6K 7K 166960K 112 0 ether_multi 1 0K 0K 166960K 2 0 mrt 0 0K 0K 166960K 13 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 61 281K 281K 166960K 61 0 exec 0 0K 1K 166960K 401 0 fusefs mount 1 32K 32K 166960K 1 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 202 134K 152K 166960K 4391 0 UVM aobj 12 2K 2K 166960K 12 0 pinsyscall 36 72K 94K 166960K 1444 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 8 0 NDP 10 0K 2K 166960K 31 0 temp 32 9102K 13202K 166960K 9540 0 kqueue 13 20K 26K 166960K 56 0 SYN cache 2 16K 16K 166960K 2 0 ddb> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle rtpcb 120 51 0 48 1 0 1 1 0 8 0 rtentry 136 125 0 36 4 0 4 4 0 8 0 unpcb 144 179 0 164 1 0 1 1 0 8 0 syncache 336 6 0 5 1 0 1 1 0 8 0 tcpcb 736 74 0 69 4 0 4 4 0 8 3 arp 96 20 0 4 1 0 1 1 0 8 0 ipq 40 1 0 0 1 0 1 1 0 8 0 ipqe 40 1 0 0 1 0 1 1 0 8 0 inpcb 328 221 0 212 5 1 4 4 0 8 3 ip6q 72 1 0 0 1 0 1 1 0 8 0 ip6af 40 2 0 0 1 0 1 1 0 8 0 nd6 112 28 0 6 1 0 1 1 0 8 0 pkpcb 40 1 0 1 1 1 0 1 0 8 0 kcovpl 48 9 0 2 1 0 1 1 0 8 0 ppxss 1072 1 0 1 1 0 1 1 0 8 1 pfstscr 40 6 0 4 1 0 1 1 0 8 0 pfrktable 1344 4 0 2 1 0 1 1 0 8 0 pfanchor 1288 3 0 0 1 0 1 1 0 8 0 pftag 88 1 0 1 1 1 0 1 0 8 0 pfstitem 24 4 0 0 1 0 1 1 0 8 0 pfstkey 128 8 0 4 1 0 1 1 0 8 0 pfstate 384 4 0 2 1 0 1 1 0 8 0 pfrule 1360 4 0 3 1 0 1 1 0 8 0 rttmr 136 1 0 1 1 0 1 1 0 8 1 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 498 0 129 29 2 27 29 0 8 2 art_table 40 499 0 129 5 0 5 5 0 8 0 art_node 32 124 0 44 1 0 1 1 0 8 0 sysvmsgpl 40 1 0 0 1 0 1 1 0 8 0 semapl 72 61 0 51 1 0 1 1 0 8 0 shmpl 112 9 0 0 1 0 1 1 0 8 0 dirhash 1024 21 0 4 3 0 3 3 0 8 0 dino2pl 256 1853 0 394 92 0 92 92 0 8 0 ffsino 256 1855 0 396 92 0 92 92 0 8 0 nchpl 144 2304 0 606 64 0 64 64 0 8 0 vnodes 216 2119 0 0 118 0 118 118 0 8 0 namei 1024 7565 0 7565 3 2 1 2 0 8 1 pfiaddrpl 120 1 0 0 1 0 1 1 0 8 0 kstatmem 264 27 0 6 2 0 2 2 0 8 0 scsiplug 72 1 0 1 1 1 0 1 0 8 0 scxspl 216 8494 0 8494 11 3 8 8 1 8 8 plimitpl 152 51 0 34 1 0 1 1 0 8 0 sigapl 424 627 0 585 8 2 6 8 0 8 0 knotepl 120 9533 0 9488 18 8 10 10 0 8 8 kqueuepl 184 63 0 53 1 0 1 1 0 8 0 pipepl 304 137 0 110 3 0 3 3 0 8 0 fdescpl 448 593 0 566 5 1 4 5 0 8 0 filepl 120 2683 0 2481 9 0 9 9 0 8 2 lockfpl 104 61 0 58 1 0 1 1 0 8 0 lockfspl 48 28 0 25 1 0 1 1 0 8 0 sessionpl 144 38 0 30 1 0 1 1 0 8 0 pgrppl 48 54 0 38 1 0 1 1 0 8 0 ucredpl 104 236 0 225 1 0 1 1 0 8 0 zombiepl 144 655 0 653 1 0 1 1 0 8 0 processpl 1152 627 0 585 5 1 4 5 0 8 0 procpl 664 891 0 841 8 2 6 7 0 8 0 sockpl 552 458 0 431 5 0 5 5 0 8 2 mcl64k 65536 79 0 79 2 1 1 1 0 8 1 mcl16k 16384 7 0 7 2 1 1 1 0 8 1 mcl12k 12288 2 0 2 1 1 0 1 0 8 0 mcl8k 8192 6 0 6 2 1 1 1 0 8 1 mcl4k 4096 2734 0 2680 12 4 8 12 0 8 1 mcl2k 2048 319 0 317 4 3 1 4 0 8 0 mtagpl 96 5 0 5 2 1 1 1 0 8 1 mbufpl 256 6196 0 6049 20 2 18 18 0 8 3 bufpl 280 2761 0 103 190 0 190 190 0 8 0 anonpl 24 109962 0 106960 64 12 52 52 0 186 22 amapchunkpl 152 13311 0 12893 36 8 28 28 0 158 9 amappl16 200 1903 0 1881 16 5 11 14 0 8 8 amappl15 192 6 0 6 1 1 0 1 0 8 0 amappl14 184 445 0 443 1 0 1 1 0 8 0 amappl13 176 119 0 109 1 0 1 1 0 8 0 amappl12 168 843 0 817 2 0 2 2 0 8 0 amappl11 160 11 0 11 1 1 0 1 0 8 0 amappl10 152 68 0 58 1 0 1 1 0 8 0 amappl9 144 338 0 338 1 1 0 1 0 8 0 amappl8 136 98 0 97 1 0 1 1 0 8 0 amappl7 128 145 0 133 1 0 1 1 0 8 0 amappl6 120 161 0 160 1 0 1 1 0 8 0 amappl5 112 112 0 104 1 0 1 1 0 8 0 amappl4 104 340 0 323 1 0 1 1 0 8 0 amappl3 96 2514 0 2413 4 0 4 4 0 8 0 amappl2 88 531 0 476 2 0 2 2 0 8 0 amappl1 80 11012 0 10470 13 1 12 13 0 8 0 amappl 88 3648 0 3507 5 0 5 5 0 92 1 uvmvnodes 80 104 0 0 3 0 3 3 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 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 11 0 0 1 0 1 1 0 8 0 uaddrrnd 24 593 0 566 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 593 0 566 1 0 1 1 0 8 0 vmmpekpl 168 6760 0 6719 2 0 2 2 0 8 0 vmmpepl 168 47095 0 45413 94 4 90 90 0 357 8 vmsppl 368 592 0 566 4 1 3 4 0 8 0 rwobjpl 40 16176 0 15249 13 0 13 13 0 8 0 pdppl 4096 1192 0 1132 98 32 66 80 0 8 6 pvpl 32 285877 0 277635 143 20 123 123 0 265 36 pmappl 216 592 0 566 3 1 2 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 379 0 53 10 0 10 10 0 8 0 ddb> machine ddbcpu 0 No such command ddb> trace memset() at memset+0x49 ffs_write(ffff80002a884c50) at ffs_write+0xb9a sys/ufs/ffs/ffs_vnops.c:401 VOP_WRITE(fffffd8068d590e0,ffff80002a884d00,3,fffffd8007ffd270) at VOP_WRITE+0x101 sys/kern/vfs_vops.c:245 ktrwriteraw(ffff80002a736a68,fffffd8068d590e0,fffffd8007ffd270,ffff80002a884dd0,ffff80002a884db0) at ktrwriteraw+0x19b sys/kern/kern_ktrace.c:692 ktrsyscall(ffff80002a736a68,b,20,ffff80002a884f50) at ktrsyscall+0x332 ktrwrite sys/kern/kern_ktrace.c:-1 [inline] ktrsyscall(ffff80002a736a68,b,20,ffff80002a884f50) at ktrsyscall+0x332 sys/kern/kern_ktrace.c:183 syscall(ffff80002a884f50) at syscall+0x2bc mi_syscall sys/sys/syscall_mi.h:154 [inline] syscall(ffff80002a884f50) at syscall+0x2bc sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7203b2da8a30, count: -7 ddb> machine ddbcpu 1 No such command ddb> trace memset() at memset+0x49 ffs_write(ffff80002a884c50) at ffs_write+0xb9a sys/ufs/ffs/ffs_vnops.c:401 VOP_WRITE(fffffd8068d590e0,ffff80002a884d00,3,fffffd8007ffd270) at VOP_WRITE+0x101 sys/kern/vfs_vops.c:245 ktrwriteraw(ffff80002a736a68,fffffd8068d590e0,fffffd8007ffd270,ffff80002a884dd0,ffff80002a884db0) at ktrwriteraw+0x19b sys/kern/kern_ktrace.c:692 ktrsyscall(ffff80002a736a68,b,20,ffff80002a884f50) at ktrsyscall+0x332 ktrwrite sys/kern/kern_ktrace.c:-1 [inline] ktrsyscall(ffff80002a736a68,b,20,ffff80002a884f50) at ktrsyscall+0x332 sys/kern/kern_ktrace.c:183 syscall(ffff80002a884f50) at syscall+0x2bc mi_syscall sys/sys/syscall_mi.h:154 [inline] syscall(ffff80002a884f50) at syscall+0x2bc sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7203b2da8a30, count: -7