uvm_fault(0xffffffff82cf0250, 0xffff8000181ff000, 0, 2) -> d kernel: page fault trap, code=2 Stopped at memset+0x52: repe stosq %es:(%rdi) TID PID UID PRFLAGS PFLAGS CPU COMMAND *458720 11289 0 0 0x4000000 0K syz-executor.3 memset() at memset+0x52 VOP_WRITE(fffffd80701e3d08,ffff80002127cfe0,5,fffffd807f7d6618) at VOP_WRITE+0xc3 sys/kern/vfs_vops.c:245 vn_write(fffffd80657e3be0,ffff80002127cfe0,0) at vn_write+0x15b sys/kern/vfs_vnops.c:408 dofilewritev(ffff80002121e590,7,ffff80002127cfe0,0,ffff80002127d0d0) at dofilewritev+0x1a0 sys/kern/sys_generic.c:375 sys_writev(ffff80002121e590,ffff80002127d080,ffff80002127d0d0) at sys_writev+0xab sys/kern/sys_generic.c:322 syscall(ffff80002127d150) at syscall+0x606 mi_syscall sys/sys/syscall_mi.h:110 [inline] syscall(ffff80002127d150) at syscall+0x606 sys/arch/amd64/amd64/trap.c:632 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xf885ef33d70, 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{0}> ddb{0}> set $lines = 0 ddb{0}> set $maxwidth = 0 ddb{0}> show panic *cpu0: uvm_fault(0xffffffff82cf0250, 0xffff8000181ff000, 0, 2) -> d ddb{0}> trace memset() at memset+0x52 VOP_WRITE(fffffd80701e3d08,ffff80002127cfe0,5,fffffd807f7d6618) at VOP_WRITE+0xc3 sys/kern/vfs_vops.c:245 vn_write(fffffd80657e3be0,ffff80002127cfe0,0) at vn_write+0x15b sys/kern/vfs_vnops.c:408 dofilewritev(ffff80002121e590,7,ffff80002127cfe0,0,ffff80002127d0d0) at dofilewritev+0x1a0 sys/kern/sys_generic.c:375 sys_writev(ffff80002121e590,ffff80002127d080,ffff80002127d0d0) at sys_writev+0xab sys/kern/sys_generic.c:322 syscall(ffff80002127d150) at syscall+0x606 mi_syscall sys/sys/syscall_mi.h:110 [inline] syscall(ffff80002127d150) at syscall+0x606 sys/arch/amd64/amd64/trap.c:632 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xf885ef33d70, count: -7 ddb{0}> show registers rdi 0xffff8000181ff000 rsi 0 rbp 0xffff80002127cdb0 rbx 0xe rdx 0 rcx 0x800 rax 0 r8 0x4000 __ALIGN_SIZE+0x3000 r9 0 r10 0x8bd0d900cbd60e6f r11 0xffff8000181ff000 r12 0x4000 __ALIGN_SIZE+0x3000 r13 0x4000 __ALIGN_SIZE+0x3000 r14 0xffff8000181ff000 r15 0x4000 __ALIGN_SIZE+0x3000 rip 0xffffffff816be992 memset+0x52 cs 0x8 rflags 0x10206 __ALIGN_SIZE+0xf206 rsp 0xffff80002127cce8 ss 0x10 memset+0x52: repe stosq %es:(%rdi) ddb{0}> show proc PROC (syz-executor.3) pid=458720 stat=onproc flags process=0 proc=4000000 pri=17, usrpri=84, nice=20 forw=0xffffffffffffffff, list=0xffff8000211f3b40,0xffff80002121fb60 process=0xffff80002e449510 user=0xffff800021278000, vmspace=0xfffffd8069bfe1e8 estcpu=34, cpticks=2, pctcpu=0.0 user=0, sys=1, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 24956 510295 94038 0 2 0 syz-executor.5 24956 232844 94038 0 3 0x4000080 fsleep syz-executor.5 26453 30314 44322 0 2 0 syz-executor.7 26453 284292 44322 0 3 0x4000080 fsleep syz-executor.7 26453 330762 44322 0 3 0x4000080 fsleep syz-executor.7 26453 517263 44322 0 3 0x4000080 fsleep syz-executor.7 11289 456966 74048 0 2 0 syz-executor.3 *11289 458720 74048 0 7 0x4000000 syz-executor.3 11289 33303 74048 0 3 0x4000000 inode syz-executor.3 11289 5542 74048 0 2 0x4000000 syz-executor.3 63089 164268 86872 0 2 0 syz-executor.1 63089 107390 86872 0 3 0x4000080 netio syz-executor.1 63089 60537 86872 0 2 0x4000000 syz-executor.1 63089 195426 86872 0 3 0x4000080 fsleep syz-executor.1 60952 392983 94129 60928 2 0x10 syz-executor.6 60952 462301 94129 60928 3 0x4000090 fsleep syz-executor.6 4874 81893 83604 0 2 0 syz-executor.2 4874 346344 83604 0 3 0x4000080 fsleep syz-executor.2 94038 338024 91666 0 2 0x482 syz-executor.5 45599 162376 91666 0 2 0x482 syz-executor.0 44322 150593 91666 0 2 0x482 syz-executor.7 94129 190573 91666 0 2 0x482 syz-executor.6 83604 266331 91666 0 2 0x482 syz-executor.2 19928 382600 91666 0 2 0x2 syz-executor.4 86872 225092 91666 0 2 0x482 syz-executor.1 74048 52243 91666 0 2 0x482 syz-executor.3 3292 140527 1 0 3 0x100083 ttyin getty 41531 496031 0 0 3 0x14280 nfsidl nfsio 13361 365672 0 0 3 0x14280 nfsidl nfsio 44008 450651 0 0 3 0x14280 nfsidl nfsio 33848 38484 0 0 3 0x14280 nfsidl nfsio 96677 310267 0 0 3 0x14280 nfsidl nfsio 94419 260996 0 0 3 0x14280 nfsidl nfsio 71238 99097 0 0 3 0x14280 nfsidl nfsio 60183 520250 0 0 3 0x14280 nfsidl nfsio 69893 313503 0 0 3 0x14280 nfsidl nfsio 62617 295606 0 0 3 0x14280 nfsidl nfsio 3341 356425 0 0 3 0x14280 nfsidl nfsio 27541 136469 0 0 3 0x14280 nfsidl nfsio 74663 111627 0 0 3 0x14280 nfsidl nfsio 14437 184445 0 0 3 0x14280 nfsidl nfsio 12208 352502 0 0 3 0x14280 nfsidl nfsio 62411 180394 0 0 3 0x14280 nfsidl nfsio 82463 295767 0 0 3 0x14280 nfsidl nfsio 38396 188959 0 0 3 0x14280 nfsidl nfsio 37237 67208 0 0 3 0x14280 nfsidl nfsio 95935 93096 0 0 3 0x14280 nfsidl nfsio 73011 154247 0 0 3 0x14200 bored sosplice 91666 386322 91215 0 3 0x82 thrsleep syz-fuzzer 91666 227838 91215 0 3 0x4000082 thrsleep syz-fuzzer 91666 85182 91215 0 3 0x4000082 wait syz-fuzzer 91666 118580 91215 0 3 0x4000082 wait syz-fuzzer 91666 173910 91215 0 3 0x4000082 thrsleep syz-fuzzer 91666 180468 91215 0 3 0x4000082 wait syz-fuzzer 91666 489549 91215 0 3 0x4000082 wait syz-fuzzer 91666 187480 91215 0 3 0x4000082 thrsleep syz-fuzzer 91666 349987 91215 0 3 0x4000082 thrsleep syz-fuzzer 91666 118217 91215 0 3 0x4000082 wait syz-fuzzer 91666 491717 91215 0 3 0x4000082 thrsleep syz-fuzzer 91666 321036 91215 0 3 0x4000082 thrsleep syz-fuzzer 91666 491965 91215 0 3 0x4000082 kqread syz-fuzzer 91666 301948 91215 0 3 0x4000082 wait syz-fuzzer 91666 155109 91215 0 3 0x4000082 wait syz-fuzzer 91666 25974 91215 0 3 0x4000082 wait syz-fuzzer 91215 28210 83040 0 3 0x10008a sigsusp ksh 83040 136393 91532 0 3 0x9a kqread sshd 91532 6304 1 0 3 0x88 kqread sshd 36624 383748 75894 74 3 0x1100092 bpf pflogd 75894 35405 1 0 3 0x80 netio pflogd 31080 393548 26260 73 3 0x1100090 kqread syslogd 26260 436000 1 0 3 0x100082 netio syslogd 80190 318061 1 0 3 0x100080 kqread resolvd 8140 90391 0 0 3 0x14200 bored smr 28121 355453 0 0 2 0x14200 zerothread 53683 164347 0 0 3 0x14200 aiodoned aiodoned 81708 224099 0 0 3 0x14200 syncer update 91261 347484 0 0 3 0x14200 cleaner cleaner 30812 102017 0 0 3 0x14200 reaper reaper 23651 442152 0 0 3 0x14200 pgdaemon pagedaemon 50584 262599 0 0 3 0x14200 bored viomb 13331 108235 0 0 3 0x40014200 acpi0 acpi0 56632 193310 0 0 7 0x40014200 idle1 82901 496538 0 0 3 0x14200 bored softnet3 2602 382289 0 0 3 0x14200 bored softnet2 73419 8503 0 0 3 0x14200 bored softnet1 72486 31219 0 0 3 0x14200 bored softnet0 71720 195810 0 0 3 0x14200 bored systqmp 39990 489527 0 0 3 0x14200 bored systq 85924 110080 0 0 2 0x40014200 softclock 71978 481919 0 0 3 0x40014200 idle0 1 167465 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 10206 6493K 6743K 78643K 15345 0 pcb 13 22K 26K 78643K 2776 0 rtable 155 15K 16K 78643K 4624 0 ifaddr 73 25K 29K 78643K 1249 0 sysctl 3 1K 1K 78643K 3 0 counters 56 35K 36K 78643K 836 0 ioctlops 0 0K 4K 78643K 11035 0 iov 3 20K 36K 78643K 2706 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 4 0 vnodes 1469 92K 92K 78643K 6643 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 3 5K 13K 78643K 830 0 VM map 2 1K 1K 78643K 2 0 sem 12 0K 0K 78643K 1734 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12548 0 file desc 16 57K 85K 78643K 15076 0 sigio 1 0K 0K 78643K 329 0 proc 69 67K 140K 78643K 1681 0 subproc 104 6K 6K 78643K 452 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 1124 0 in_multi 46 3K 6K 78643K 2491 0 ether_multi 1 0K 0K 78643K 36 0 mrt 1 0K 0K 78643K 17 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 181 811K 811K 78643K 181 0 exec 0 0K 1K 78643K 2366 0 pfkey data 0 0K 0K 78643K 4 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 451 98K 110K 78643K 142813 0 UVM aobj 131 4K 4K 78643K 134 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 1 0K 0K 78643K 2715 0 NDP 14 0K 1K 78643K 576 0 temp 141 5887K 71530K 78643K 140760 0 kqueue 6 10K 28K 78643K 980 0 SYN cache 2 2K 17K 78643K 4 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 120 968 0 967 13 12 1 3 0 8 0 rtentry 112 1759 0 1701 5 2 3 4 0 8 0 unpcb 144 17089 0 17072 132 126 6 10 0 8 5 syncache 296 67 0 67 20 20 0 1 0 8 0 tcpqe 32 461 0 461 14 14 0 2 0 8 0 tcpcb 776 6204 0 6192 158 156 2 14 0 8 0 arp 120 79 0 67 1 0 1 1 0 8 0 inpcb 368 20176 0 20160 179 174 5 20 0 8 2 nd6 136 434 0 424 1 0 1 1 0 8 0 pkpcb 40 53 0 53 3 3 0 1 0 8 0 kcovpl 48 34 0 26 1 0 1 1 0 8 0 mppekey 1024 9 0 9 3 3 0 1 0 8 0 ppxss 1256 239 0 239 16 16 0 1 0 8 0 pppxif 1456 107 0 107 9 9 0 1 0 8 0 pfstscr 40 22 0 22 3 3 0 1 0 8 0 pffrag 232 134 0 134 6 5 1 1 0 482 1 pffrnode 88 134 0 134 6 5 1 1 0 8 1 pffrent 40 428 0 428 7 6 1 1 0 8 1 pfosfp 40 1431 0 1007 5 0 5 5 0 8 0 pfosfpen 112 1431 0 716 21 0 21 21 0 8 0 pfanchor 1288 718 96 206 46 3 43 43 0 8 0 pfqueue 264 6 0 6 2 2 0 1 0 8 0 pfstitem 24 556 0 554 2 1 1 2 0 8 0 pfstkey 128 570 0 568 9 8 1 9 0 8 0 pfstate 384 557 0 555 27 26 1 27 0 8 0 pfrule 1344 21 0 20 2 1 1 2 0 8 0 rttmr 136 5 0 5 2 2 0 1 0 8 0 art_heap8 4096 16 0 14 11 8 3 3 0 8 1 art_heap4 256 9334 0 9087 52 36 16 29 0 8 0 art_table 32 9350 0 9101 4 1 3 4 0 8 0 art_node 16 1727 0 1678 1 0 1 1 0 8 0 semapl 112 1732 0 1722 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 21279 0 19792 93 0 93 93 0 8 0 ffsino 272 21279 0 19792 100 0 100 100 0 8 0 nchpl 144 43509 0 42964 63 40 23 63 0 8 0 rtmask 32 3 0 3 1 1 0 1 0 8 0 uvmvnodes 80 6086 0 0 125 0 125 125 0 8 0 vnodes 216 6086 0 0 339 0 339 339 0 8 0 namei 1024 150448 0 150447 8 7 1 2 0 8 0 percpumem 16 431 0 390 1 0 1 1 0 8 0 kstatmem 264 428 0 400 14 11 3 3 0 8 0 scsiplug 72 16 0 16 5 5 0 1 0 8 0 scxspl 216 123849 0 123849 20 17 3 8 0 8 3 plimitpl 152 2000 0 1985 1 0 1 1 0 8 0 sigapl 424 15357 0 15292 9 1 8 8 0 8 0 futexpl 64 170858 0 170851 7 6 1 1 0 8 0 knotepl 120 895 0 0 15 2 13 15 0 8 0 kqueuepl 216 2341 0 2335 37 34 3 5 0 8 2 pipepl 320 3044 0 3016 82 77 5 11 0 8 0 fdescpl 496 15318 0 15292 5 1 4 5 0 8 0 filepl 152 118378 0 118135 148 134 14 23 0 8 1 lockfpl 104 3942 0 3941 8 7 1 2 0 8 0 lockfspl 48 1080 0 1079 1 0 1 1 0 8 0 sessionpl 144 51 0 35 1 0 1 1 0 8 0 pgrppl 48 85 0 69 1 0 1 1 0 8 0 ucredpl 104 11292 0 11274 1 0 1 1 0 8 0 zombiepl 144 15293 0 15292 2 1 1 1 0 8 0 processpl 1072 15357 0 15292 5 0 5 5 0 8 0 procpl 696 38376 0 38284 23 14 9 10 0 8 0 srpgc 96 38 0 38 14 14 0 1 0 8 0 sosppl 168 105 0 105 15 14 1 1 0 8 1 sockpl 488 38296 0 38264 694 682 12 34 0 8 8 mcl64k 65536 17 0 0 3 1 2 3 0 8 0 mcl16k 16384 17 0 0 3 0 3 3 0 8 0 mcl12k 12288 26 0 0 2 0 2 2 0 8 0 mcl9k 9216 8 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 6 0 0 1 0 1 1 0 8 0 mcl2k 2048 525 0 0 62 27 35 62 0 8 0 mtagpl 96 63 0 0 2 0 2 2 0 8 0 mbufpl 256 1902 0 0 77 0 77 77 0 8 0 bufpl 288 26812 0 20492 452 0 452 452 0 8 0 anonpl 24 1511306 0 1495608 265 150 115 172 0 186 0 amapchunkpl 152 473001 0 471984 148 107 41 70 0 158 0 amappl16 200 29142 0 28665 120 92 28 39 0 8 0 amappl15 192 17 0 17 1 1 0 1 0 8 0 amappl14 184 256 0 239 2 0 2 2 0 8 0 amappl13 176 21 0 20 1 0 1 1 0 8 0 amappl12 168 16375 0 16345 3 1 2 2 0 8 0 amappl11 160 81 0 71 1 0 1 1 0 8 0 amappl10 152 64 0 51 1 0 1 1 0 8 0 amappl9 144 279 0 279 27 27 0 2 0 8 0 amappl8 136 622 0 473 6 0 6 6 0 8 0 amappl7 128 120 0 101 1 0 1 1 0 8 0 amappl6 120 527 0 505 2 1 1 2 0 8 0 amappl5 112 471 0 465 1 0 1 1 0 8 0 amappl4 104 1242 0 1202 3 1 2 3 0 8 0 amappl3 96 89151 0 89052 4 1 3 3 0 8 0 amappl2 88 16061 0 16002 3 1 2 3 0 8 0 amappl1 80 64733 0 64270 23 11 12 23 0 8 0 amappl 88 141687 0 141409 7 0 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 3 3 0 3 3 0 8 0 uaddrrnd 24 15318 0 15292 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 15318 0 15292 1 0 1 1 0 8 0 vmmpekpl 168 107144 0 107080 4 0 4 4 0 8 0 vmmpepl 168 903123 0 900768 361 235 126 136 0 357 9 vmsppl 464 15317 0 15292 5 1 4 5 0 8 0 rwobjpl 56 213656 0 205865 117 5 112 113 0 8 0 pdppl 4096 30644 0 30584 676 612 64 80 0 8 4 pvpl 32 4421178 0 4399841 654 465 189 347 0 265 0 pmappl 248 15317 0 15292 3 0 3 3 0 8 0 extentpl 40 56 0 38 1 0 1 1 0 8 0 phpool 112 1747 0 886 26 0 26 26 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace memset() at memset+0x52 VOP_WRITE(fffffd80701e3d08,ffff80002127cfe0,5,fffffd807f7d6618) at VOP_WRITE+0xc3 sys/kern/vfs_vops.c:245 vn_write(fffffd80657e3be0,ffff80002127cfe0,0) at vn_write+0x15b sys/kern/vfs_vnops.c:408 dofilewritev(ffff80002121e590,7,ffff80002127cfe0,0,ffff80002127d0d0) at dofilewritev+0x1a0 sys/kern/sys_generic.c:375 sys_writev(ffff80002121e590,ffff80002127d080,ffff80002127d0d0) at sys_writev+0xab sys/kern/sys_generic.c:322 syscall(ffff80002127d150) at syscall+0x606 mi_syscall sys/sys/syscall_mi.h:110 [inline] syscall(ffff80002127d150) at syscall+0x606 sys/arch/amd64/amd64/trap.c:632 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xf885ef33d70, count: -7 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x1e: addq $0x8,%rsp x86_ipi_db(ffff800020d58ff0) at x86_ipi_db+0x1e 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(ffff800020d58ff0) at sched_idle+0x427 sys/kern/kern_sched.c:175 end trace frame: 0x0, count: 10 ddb{1}> trace x86_ipi_db(ffff800020d58ff0) at x86_ipi_db+0x1e 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(ffff800020d58ff0) at sched_idle+0x427 sys/kern/kern_sched.c:175 end trace frame: 0x0, count: -5