uvm_fault(0xffffffff82ae7130, 0xffff80000b82f26b, 0, 2) -> d kernel: page fault trap, code=0 Stopped at memset+0x45: repe stosb %es:(%rdi) TID PID UID PRFLAGS PFLAGS CPU COMMAND *352628 57442 0 0 0x4000001 0K syz-execu tor.2 memset() at memset+0x45 ffs_write(ffff80002fd67b00) at ffs_write+0x93c VOP_WRITE(fffffd8063152950,ffff80002fd67bb8,3,fffffd807f7d74 10) at VOP_WRITE+0xbf sys/kern/vfs_vops.c:245 ktrwriteraw(ffff80002b0262a8,fffffd8063152950,fffffd807f7d74 10,ffff80002fd67c98,ffff80002fd67c60) at ktrwriteraw+0x15f sys/kern/kern_ktrace.c:660 ktrsysret(ffff80002b0262a8,141,0,ffff80002fd67d90) at ktrsys ret+0x18c syscall(ffff80002fd67e10) at syscall+0x5d5 mi_syscall_return sys/sys/syscall_mi.h:131 [inline] syscall(ffff80002fd67e10) at syscall+0x5d5 sys/arch/amd64/amd64/trap.c:607 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xa4604c13920, count: 8 https://www.openbsd.org/ddb.html describes the minimum info r equired in bug reports. Insufficient info makes it difficult to find and f ix bugs. ddb{0}> ddb{0}> set $lines = 0 ddb{0}> set $maxwidth = 0 ddb{0}> show panic *cpu0: uvm_fault(0xffffffff82ae7130, 0xffff80000b82f26b, 0, 2) -> d ddb{0}> trace memset() at memset+0x45 ffs_write(ffff80002fd67b00) at ffs_write+0x93c VOP_WRITE(fffffd8063152950,ffff80002fd67bb8,3,fffffd807f7d7410) at VOP_WRITE+0xbf sys/kern/vfs_vops.c:245 ktrwriteraw(ffff80002b0262a8,fffffd8063152950,fffffd807f7d7410,ffff80002fd67c98,ffff80002fd67c60) at ktrwriteraw+0x15f sys/kern/kern_ktrace.c:660 ktrsysret(ffff80002b0262a8,141,0,ffff80002fd67d90) at ktrsysret+0x18c ktrwrite2 sys/kern/kern_ktrace.c:625 [inline] ktrsysret(ffff80002b0262a8,141,0,ffff80002fd67d90) at ktrsysret+0x18c sys/kern/kern_ktrace.c:207 syscall(ffff80002fd67e10) at syscall+0x5d5 mi_syscall_return sys/sys/syscall_mi.h:131 [inline] syscall(ffff80002fd67e10) at syscall+0x5d5 sys/arch/amd64/amd64/trap.c:607 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xa4604c13920, count: -7 ddb{0}> show registers rdi 0xffff80000b82f26b rsi 0 rbp 0xffff80002fd67a20 rbx 0x1 rdx 0x5 rcx 0x5 rax 0 r8 0x590 r9 0xffff80002fd67978 r10 0x9db03c9637c6bb0d r11 0xffff80000b82f26b r12 0x26b r13 0xfffffd8064be6ab8 r14 0x800 r15 0xfffffd8064be6aa0 rip 0xffffffff81cb7655 memset+0x45 cs 0x8 rflags 0x10206 __ALIGN_SIZE+0xf206 rsp 0xffff80002fd67828 ss 0x10 memset+0x45: repe stosb %es:(%rdi) ddb{0}> show proc PROC (syz-executor.2) pid=352628 stat=onproc flags process=0 proc=4000001 pri=32, usrpri=85, nice=20 forw=0xffffffffffffffff, list=0xffff80002b0277a8,0xffff80002b0357c0 process=0xffff800029619908 user=0xffff80002fd62000, vmspace=0xfffffd8068c24e68 estcpu=35, cpticks=3, pctcpu=0.0 user=0, sys=3, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 19243 511537 29217 0 2 0 syz-executor.6 19243 418861 29217 0 2 0x4000000 syz-executor.6 70424 3210 31699 0 2 0 syz-executor.3 70424 364074 31699 0 3 0x4000080 fsleep syz-executor.3 72365 474150 3411 0 2 0 syz-executor.1 72365 191349 3411 0 3 0x4000080 fsleep syz-executor.1 6316 79373 87018 0 2 0 syz-executor.7 6316 126809 87018 0 3 0x4000080 fsleep syz-executor.7 50589 115866 16858 0 2 0 syz-executor.5 50589 56349 16858 0 3 0x4000080 fsleep syz-executor.5 12711 204571 2205 0 2 0 syz-executor.4 12711 75353 2205 0 3 0x4000080 fsleep syz-executor.4 50633 431002 87010 0 2 0 syz-executor.0 50633 26351 87010 0 3 0x4000080 fsleep syz-executor.0 50633 474942 87010 0 3 0x4000080 fsleep syz-executor.0 57442 250950 82189 0 2 0 syz-executor.2 57442 223748 82189 0 3 0x4000080 kqread syz-executor.2 *57442 352628 82189 0 7 0x4000001 syz-executor.2 72858 519224 0 0 3 0x14200 acct acct 31699 57037 7431 0 2 0x482 syz-executor.3 82189 195812 7431 0 2 0x482 syz-executor.2 16858 16828 7431 0 2 0x482 syz-executor.5 29217 132427 7431 0 2 0x482 syz-executor.6 87010 293821 7431 0 2 0x482 syz-executor.0 2853 107373 1 0 3 0x100083 ttyin getty 2205 232978 7431 0 2 0x482 syz-executor.4 87018 391011 7431 0 2 0x482 syz-executor.7 3411 406933 7431 0 2 0x482 syz-executor.1 91917 232083 0 0 3 0x14280 nfsidl nfsio 46720 180645 0 0 3 0x14280 nfsidl nfsio 21851 450176 0 0 3 0x14280 nfsidl nfsio 34892 91723 0 0 3 0x14280 nfsidl nfsio 27019 141630 0 0 3 0x14280 nfsidl nfsio 39203 329696 0 0 3 0x14280 nfsidl nfsio 67312 54035 0 0 3 0x14280 nfsidl nfsio 32594 191055 0 0 3 0x14280 nfsidl nfsio 16899 344193 0 0 3 0x14280 nfsidl nfsio 12276 8944 0 0 3 0x14200 bored sosplice 52648 406835 87147 0 3 0x100082 netio ndp 87147 325146 1 0 3 0x10008a sigsusp sh 7431 77702 23559 0 3 0x82 thrsleep syz-fuzzer 7431 286588 23559 0 3 0x4000082 thrsleep syz-fuzzer 7431 358358 23559 0 3 0x4000082 thrsleep syz-fuzzer 7431 365714 23559 0 3 0x4000082 thrsleep syz-fuzzer 7431 521664 23559 0 3 0x4000082 thrsleep syz-fuzzer 7431 78543 23559 0 3 0x4000082 wait syz-fuzzer 7431 55836 23559 0 3 0x4000082 wait syz-fuzzer 7431 201016 23559 0 3 0x4000082 wait syz-fuzzer 7431 150620 23559 0 3 0x4000082 thrsleep syz-fuzzer 7431 203850 23559 0 3 0x4000082 wait syz-fuzzer 7431 24350 23559 0 3 0x4000082 wait syz-fuzzer 7431 374360 23559 0 3 0x4000082 wait syz-fuzzer 7431 506596 23559 0 3 0x4000082 kqread syz-fuzzer 7431 184137 23559 0 3 0x4000082 thrsleep syz-fuzzer 7431 355718 23559 0 3 0x4000082 wait syz-fuzzer 7431 173352 23559 0 3 0x4000082 thrsleep syz-fuzzer 7431 131608 23559 0 3 0x4000082 wait syz-fuzzer 23559 256831 30474 0 3 0x10008a sigsusp ksh 30474 402809 77272 0 3 0x9a kqread sshd 77272 452543 1 0 3 0x88 kqread sshd 94371 328762 2591 74 2 0x1100492 pflogd 2591 327957 1 0 3 0x80 netio pflogd 44350 138226 19531 73 3 0x1100090 kqread syslogd 19531 399746 1 0 3 0x100082 netio syslogd 56383 467659 1 0 3 0x100080 kqread resolvd 48065 482750 28590 77 3 0x100092 kqread dhcpleased 31003 500723 28590 77 3 0x100092 kqread dhcpleased 28590 290231 1 0 3 0x80 kqread dhcpleased 82359 108935 0 0 3 0x14200 bored smr 27487 194252 0 0 2 0x14200 zerothread 42556 256731 0 0 3 0x14200 aiodoned aiodoned 38948 60435 0 0 3 0x14200 syncer update 96648 99671 0 0 3 0x14200 cleaner cleaner 67378 29048 0 0 3 0x14200 reaper reaper 13176 300427 0 0 3 0x14200 pgdaemon pagedaemon 62841 162804 0 0 3 0x14200 bored viomb 47060 515112 0 0 3 0x40014200 acpi0 acpi0 22081 228314 0 0 7 0x40014200 idle1 22861 170572 0 0 3 0x14200 bored softnet 60350 292301 0 0 3 0x14200 bored softnet 47659 379465 0 0 3 0x14200 bored softnet 49438 103871 0 0 3 0x14200 bored softnet 18084 98693 0 0 3 0x14200 bored systqmp 62788 352575 0 0 3 0x14200 bored systq 71314 219937 0 0 2 0x40014200 softclock 47647 12412 0 0 3 0x40014200 idle0 1 326862 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10238 6519K 8095K 78643K 40794 0 pcb 13 14K 18K 78643K 3206 0 rtable 272 21K 24K 78643K 7284 0 ifaddr 118 30K 31K 78643K 2512 0 sysctl 2 0K 2K 78643K 18 0 counters 58 35K 36K 78643K 618 0 ioctlops 0 0K 4K 78643K 7443 0 iov 0 0K 24K 78643K 2694 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 4 0 vnodes 1874 117K 117K 78643K 13236 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 9K 78643K 197 0 VM map 2 1K 1K 78643K 2 0 sem 17 16K 32K 78643K 48 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12548 0 file desc 20 73K 89K 78643K 20422 0 sigio 1 0K 0K 78643K 1657 0 proc 73 91K 128K 78643K 4525 0 subproc 117 7K 8K 78643K 1527 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 746 0 in_multi 88 6K 7K 78643K 1715 0 ether_multi 1 0K 0K 78643K 91 0 mrt 3 0K 0K 78643K 86 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 253 1129K 1129K 78643K 253 0 exec 0 0K 2K 78643K 6199 0 pfkey data 0 0K 0K 78643K 3 0 tdb 3 0K 0K 78643K 3 0 pagedep 1 8K 8K 78643K 1 0 inodedep 1 32K 32K 78643K 1 0 newblk 1 0K 0K 78643K 1 0 VM swap 8 62K 64K 78643K 10 0 UVM amap 622 1355K 1355K 78643K 112787 0 UVM aobj 134 8K 8K 78643K 134 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 709 0 NDP 17 0K 1K 78643K 549 0 temp 150 4727K 70263K 78643K 243631 0 kqueue 12 18K 26K 78643K 1673 0 SYN cache 2 16K 16K 78643K 2 0 ddb{0}> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle plcache 128 22 0 0 1 0 1 1 0 8 0 rtpcb 120 1222 0 1218 15 14 1 4 0 8 0 rtentry 112 1637 0 1529 4 0 4 4 0 8 0 unpcb 144 46452 0 46428 293 291 2 19 0 8 1 syncache 296 104 0 104 19 19 0 1 0 8 0 tcpqe 32 69 0 69 16 16 0 1 0 8 0 tcpcb 768 5439 0 5431 224 222 2 14 0 8 0 arp 120 255 0 237 1 0 1 1 0 8 0 inpcb 368 15761 0 15748 292 288 4 14 0 8 2 nd6 48 387 0 366 1 0 1 1 0 8 0 pkpcb 40 75 0 75 12 12 0 1 0 8 0 kcovpl 48 117 0 108 1 0 1 1 0 8 0 ppxss 1256 130 0 130 24 23 1 1 0 8 1 pfstscr 40 906 0 902 4 3 1 1 0 8 0 pffrag 232 38 0 35 13 12 1 1 0 482 0 pffrnode 88 38 0 35 13 12 1 1 0 8 0 pffrent 40 183 0 180 13 12 1 1 0 8 0 pfosfp 40 1493 0 1064 5 0 5 5 0 8 0 pfosfpen 112 1493 0 716 23 0 23 23 0 8 0 pfrktable 1344 1217 0 1212 5 4 1 1 0 8 0 pfanchor 1280 649 57 137 46 3 43 43 0 8 0 pftag 88 11 0 5 1 0 1 1 0 8 0 pfstitem 24 269 0 256 1 0 1 1 0 8 0 pfstkey 120 1881 0 1876 2 1 1 2 0 8 0 pfstate 336 991 0 982 6 5 1 3 0 8 0 pfrule 1360 613 0 579 11 8 3 5 0 8 0 rttmr 136 17 0 17 5 5 0 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 7660 0 7117 73 38 35 35 0 8 0 art_table 32 7661 0 7117 5 0 5 5 0 8 0 art_node 16 1624 0 1528 1 0 1 1 0 8 0 semupl 112 5 0 5 1 1 0 1 0 8 0 semapl 112 24 0 9 1 0 1 1 0 8 0 shmpl 112 131 0 3 4 0 4 4 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 26970 0 25439 96 0 96 96 0 8 0 ffsino 272 26970 0 25439 103 0 103 103 0 8 0 nchpl 144 53483 0 51832 63 0 63 63 0 8 0 rtmask 32 13 0 13 5 5 0 1 0 8 0 uvmvnodes 80 6941 0 0 142 0 142 142 0 8 0 vnodes 216 6941 0 0 386 0 386 386 0 8 0 namei 1024 202869 0 202869 5 4 1 2 0 8 1 percpumem 16 321 0 280 1 0 1 1 0 8 0 vcpupl 2048 184 0 1 23 0 23 23 0 8 0 vmpool 568 215 0 32 14 0 14 14 0 8 0 pfiaddrpl 120 385 0 379 6 5 1 1 0 8 0 kstatmem 264 548 0 514 3 0 3 3 0 8 0 scsiplug 72 23 0 23 7 7 0 1 0 8 0 scxspl 216 157063 0 157063 31 30 1 8 0 8 1 plimitpl 152 2680 0 2663 1 0 1 1 0 8 0 sigapl 424 20548 0 20487 15 6 9 9 0 8 0 futexpl 64 197709 0 197702 6 5 1 1 0 8 0 knotepl 120 1386 0 0 18 0 18 18 0 8 0 kqueuepl 216 4013 0 4004 74 71 3 6 0 8 2 pipepl 320 5522 0 5490 149 140 9 14 0 8 6 fdescpl 496 20488 0 20455 5 0 5 5 0 8 0 filepl 152 168734 0 168448 305 289 16 29 0 8 4 lockfpl 104 4869 0 4867 9 8 1 3 0 8 0 lockfspl 48 1513 0 1511 1 0 1 1 0 8 0 sessionpl 144 140 0 122 1 0 1 1 0 8 0 pgrppl 48 234 0 216 1 0 1 1 0 8 0 ucredpl 104 17092 0 17079 1 0 1 1 0 8 0 zombiepl 144 20487 0 20487 5 4 1 1 0 8 1 processpl 1064 20548 0 20487 5 0 5 5 0 8 0 procpl 672 51646 0 51559 30 20 10 10 0 8 1 srpgc 96 178 0 178 33 33 0 1 0 8 0 sosppl 168 147 0 145 26 25 1 1 0 8 0 sockpl 488 63598 0 63557 1581 1570 11 64 0 8 5 mcl64k 65536 18 0 0 3 0 3 3 0 8 0 mcl16k 16384 13 0 0 2 0 2 2 0 8 0 mcl12k 12288 19 0 0 2 0 2 2 0 8 0 mcl9k 9216 9 0 0 1 0 1 1 0 8 0 mcl8k 8192 17 0 0 3 0 3 3 0 8 0 mcl4k 4096 17 0 0 3 0 3 3 0 8 0 mcl2k2 2112 5 0 0 1 0 1 1 0 8 0 mcl2k 2048 650 0 0 62 25 37 62 0 8 0 mtagpl 96 992 0 0 10 0 10 10 0 8 0 mbufpl 256 1746 0 0 48 2 46 47 0 8 0 bufpl 288 35239 0 28297 496 0 496 496 0 8 0 anonpl 24 3920768 0 3896053 472 317 155 209 0 186 0 amapchunkpl 152 354178 0 353031 429 383 46 353 0 158 0 amappl16 200 54599 0 53878 240 201 39 59 0 8 0 amappl15 192 3634 0 3624 1 0 1 1 0 8 0 amappl14 184 3367 0 3353 1 0 1 1 0 8 0 amappl13 176 3789 0 3784 1 0 1 1 0 8 0 amappl12 168 2220 0 2215 2 1 1 1 0 8 0 amappl11 160 2741 0 2721 7 5 2 2 0 8 0 amappl10 152 2691 0 2680 1 0 1 1 0 8 0 amappl9 144 2061 0 2055 1 0 1 1 0 8 0 amappl8 136 4440 0 4254 8 1 7 7 0 8 0 amappl7 128 2130 0 2098 6 4 2 2 0 8 0 amappl6 120 2505 0 2477 2 1 1 2 0 8 0 amappl5 112 16269 0 16240 1 0 1 1 0 8 0 amappl4 104 8341 0 8300 2 0 2 2 0 8 0 amappl3 96 61927 0 61859 2 0 2 2 0 8 0 amappl2 88 6260 0 6209 3 1 2 2 0 8 0 amappl1 80 498058 0 497258 22 5 17 20 0 8 0 amappl 88 109996 0 109703 8 1 7 7 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 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 72 133 0 0 3 0 3 3 0 8 0 uaddrrnd 24 20703 0 20487 2 0 2 2 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 20703 0 20487 2 0 2 2 0 8 0 vmmpekpl 168 152766 0 152662 5 0 5 5 0 8 0 vmmpepl 168 2015852 0 2012306 502 344 158 170 0 357 0 vmsppl 368 20702 0 20487 23 3 20 20 0 8 0 rwobjpl 56 474855 0 465647 163 32 131 133 0 8 0 pdppl 4096 41413 0 41157 1445 1189 256 256 0 8 0 pvpl 32 7774214 0 7750766 729 524 205 321 0 265 0 pmappl 248 20702 0 20487 14 0 14 14 0 8 0 extentpl 40 56 0 38 1 0 1 1 0 8 0 phpool 112 2725 0 1587 33 0 33 33 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace memset() at memset+0x45 ffs_write(ffff80002fd67b00) at ffs_write+0x93c VOP_WRITE(fffffd8063152950,ffff80002fd67bb8,3,fffffd807f7d7410) at VOP_WRITE+0xbf sys/kern/vfs_vops.c:245 ktrwriteraw(ffff80002b0262a8,fffffd8063152950,fffffd807f7d7410,ffff80002fd67c98,ffff80002fd67c60) at ktrwriteraw+0x15f sys/kern/kern_ktrace.c:660 ktrsysret(ffff80002b0262a8,141,0,ffff80002fd67d90) at ktrsysret+0x18c ktrwrite2 sys/kern/kern_ktrace.c:625 [inline] ktrsysret(ffff80002b0262a8,141,0,ffff80002fd67d90) at ktrsysret+0x18c sys/kern/kern_ktrace.c:207 syscall(ffff80002fd67e10) at syscall+0x5d5 mi_syscall_return sys/sys/syscall_mi.h:131 [inline] syscall(ffff80002fd67e10) at syscall+0x5d5 sys/arch/amd64/amd64/trap.c:607 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xa4604c13920, count: -7 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp x86_ipi_db(ffff800020dd8ff0) at x86_ipi_db+0x1a sys/arch/amd64/amd64/db_interface.c:393 x86_ipi_handler() at x86_ipi_handler+0xb7 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x23 acpicpu_idle() at acpicpu_idle+0x312 sys/dev/acpi/acpicpu.c:1206 sched_idle(ffff800020dd8ff0) at sched_idle+0x417 sys/kern/kern_sched.c:175 end trace frame: 0x0, count: 10 ddb{1}> tc No such command