uvm_fault(0xffffffff82c96cb8, 0xffff80001870f940, 0, 2) -> d kernel: page fault trap, code=0 Stopped at memset+0x4e: repe stosq %es:(%rdi) TID PID UID PRFLAGS PFLAGS CPU COMMAND memset() at memset+0x4e ffs_write(ffff80002b3e1020) at ffs_write+0x93c VOP_WRITE(fffffd806ce72648,ffff80002b3e10b8,23,fffffd807f7d79c0) at VOP_WRITE+0xbf sys/kern/vfs_vops.c:245 vn_rdwr(1,fffffd806ce72648,ffff80002b3e11a8,40,0,1,c63a68dff22a8779,0,ffff800021700848,fffffd806ce72648) at vn_rdwr+0xe9 sys/kern/vfs_vnops.c:324 acct_process(ffff800021700848) at acct_process+0x62c sys/kern/kern_acct.c:243 exit1(ffff800021700848,0,0,1) at exit1+0x387 sys/kern/kern_exit.c:209 sys_exit(ffff800021700848,ffff80002b3e1320,ffff80002b3e1370) at sys_exit+0x16 sys/kern/kern_exit.c:89 syscall(ffff80002b3e13f0) at syscall+0x446 sys/arch/amd64/amd64/trap.c:599 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffd5dd0, count: 6 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(0xffffffff82c96cb8, 0xffff80001870f940, 0, 2) -> d ddb> trace memset() at memset+0x4e ffs_write(ffff80002b3e1020) at ffs_write+0x93c VOP_WRITE(fffffd806ce72648,ffff80002b3e10b8,23,fffffd807f7d79c0) at VOP_WRITE+0xbf sys/kern/vfs_vops.c:245 vn_rdwr(1,fffffd806ce72648,ffff80002b3e11a8,40,0,1,c63a68dff22a8779,0,ffff800021700848,fffffd806ce72648) at vn_rdwr+0xe9 sys/kern/vfs_vnops.c:324 acct_process(ffff800021700848) at acct_process+0x62c sys/kern/kern_acct.c:243 exit1(ffff800021700848,0,0,1) at exit1+0x387 sys/kern/kern_exit.c:209 sys_exit(ffff800021700848,ffff80002b3e1320,ffff80002b3e1370) at sys_exit+0x16 sys/kern/kern_exit.c:89 syscall(ffff80002b3e13f0) at syscall+0x446 sys/arch/amd64/amd64/trap.c:599 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffd5dd0, count: -9 ddb> show registers rdi 0xffff80001870f940 rsi 0 rbp 0xffff80002b3e0f40 rbx 0x1 rdx 0 rcx 0x6d8 rax 0 r8 0x36c0 __ALIGN_SIZE+0x26c0 r9 0xffff80002b3e0e98 r10 0x9b26813523a3dc93 r11 0xffff80001870f940 r12 0x60940 acpi_pdirpa+0x4c7a3 r13 0xfffffd806e2ed108 r14 0x4000 __ALIGN_SIZE+0x3000 r15 0xfffffd806e2ed0f0 rip 0xffffffff8221b37e memset+0x4e cs 0x8 rflags 0x10206 __ALIGN_SIZE+0xf206 rsp 0xffff80002b3e0d48 ss 0x10 memset+0x4e: repe stosq %es:(%rdi) ddb> show proc PROC (syz-executor.5) pid=479151 stat=onproc flags process=1008 proc=2000 pri=32, usrpri=86, nice=20 forw=0xffffffffffffffff, list=0xffff800021701898,0xffff800023154048 process=0xffff80002171c010 user=0xffff80002b3dc000, vmspace=0xfffffd807f013770 estcpu=36, cpticks=1, pctcpu=0.0 user=0, sys=0, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 17322 119428 44709 0 2 0 syz-executor.4 17322 145516 44709 0 3 0x4000080 fsleep syz-executor.4 17322 304720 44709 0 3 0x4000080 fsleep syz-executor.4 69854 282750 68336 0 2 0 syz-executor.6 69854 453259 68336 0 2 0x4000000 syz-executor.6 69854 45603 68336 0 3 0x4000080 fsleep syz-executor.6 21161 507515 22864 0 2 0 syz-executor.2 21161 318151 22864 0 3 0x4000080 fsleep syz-executor.2 26791 311869 63831 0 2 0x1000000 syz-executor.0 26791 59999 63831 0 3 0x5000080 fsleep syz-executor.0 33688 246480 85599 0 2 0 syz-executor.7 33688 285124 85599 0 3 0x4000080 fsleep syz-executor.7 77766 174438 33022 0 3 0x1000080 nanoslp syz-executor.3 77766 96908 33022 0 3 0x5000080 netio syz-executor.3 77766 372484 33022 0 3 0x5000080 fsleep syz-executor.3 63831 175453 62896 0 2 0x482 syz-executor.0 68336 165337 62896 0 3 0x82 nanoslp syz-executor.6 88115 514090 62896 0 2 0x482 syz-executor.1 87506 246884 1 0 3 0x100083 ttyin getty 85599 433892 62896 0 3 0x82 nanoslp syz-executor.7 33022 31136 62896 0 3 0x82 nanoslp syz-executor.3 44709 118986 62896 0 2 0x482 syz-executor.4 22864 31599 62896 0 2 0x482 syz-executor.2 2972 91613 62896 0 3 0x82 nanoslp syz-executor.5 35125 10122 0 0 3 0x14200 acct acct 63027 382635 0 0 3 0x14200 bored sosplice 62896 287531 62868 0 3 0x82 thrsleep syz-fuzzer 62896 71996 62868 0 3 0x4000082 nanoslp syz-fuzzer 62896 330728 62868 0 3 0x4000082 wait syz-fuzzer 62896 127974 62868 0 3 0x4000082 wait syz-fuzzer 62896 486196 62868 0 3 0x4000082 thrsleep syz-fuzzer 62896 211755 62868 0 3 0x4000082 wait syz-fuzzer 62896 324979 62868 0 3 0x4000082 wait syz-fuzzer 62896 476682 62868 0 3 0x4000082 thrsleep syz-fuzzer 62896 408284 62868 0 3 0x4000082 wait syz-fuzzer 62896 417284 62868 0 3 0x4000082 wait syz-fuzzer 62896 117072 62868 0 2 0x4000482 syz-fuzzer 62896 325029 62868 0 3 0x4000082 wait syz-fuzzer 62896 234931 62868 0 3 0x4000082 wait syz-fuzzer 62896 188591 62868 0 3 0x4000082 thrsleep syz-fuzzer 62896 265994 62868 0 3 0x4000082 thrsleep syz-fuzzer 62868 221793 13087 0 3 0x10008a sigsusp ksh 13087 410508 89836 0 3 0x9a kqread sshd 89836 73865 1 0 3 0x88 kqread sshd 87800 32399 76563 73 2 0x1100090 syslogd 76563 474784 1 0 3 0x100082 netio syslogd 64600 209691 1 0 3 0x100080 kqread resolvd 32412 254512 37233 77 3 0x100092 kqread dhcpleased 8490 479246 37233 77 3 0x100092 kqread dhcpleased 37233 309730 1 0 3 0x80 kqread dhcpleased 99471 344868 0 0 3 0x14200 bored smr 7691 44960 0 0 2 0x14200 zerothread 34333 178007 0 0 3 0x14200 aiodoned aiodoned 76989 124570 0 0 3 0x14200 syncer update 41401 289701 0 0 3 0x14200 cleaner cleaner 97675 334552 0 0 3 0x14200 reaper reaper 40537 246869 0 0 3 0x14200 pgdaemon pagedaemon 38561 252220 0 0 3 0x14200 bored viomb 38359 302166 0 0 3 0x40014200 acpi0 acpi0 75723 501868 0 0 3 0x14200 bored softnet 87192 319969 0 0 3 0x14200 bored softnet 17147 36005 0 0 3 0x14200 bored softnet 68061 457287 0 0 3 0x14200 bored softnet 45992 166272 0 0 3 0x14200 bored systqmp 4932 519472 0 0 3 0x14200 bored systq 36559 497257 0 0 3 0x40014200 bored softclock 53178 286019 0 0 3 0x40014200 idle0 1 35447 0 0 3 0x80082 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb> show all locks No such command ddb> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10230 6507K 7369K 78643K 24730 0 pcb 13 18K 21K 78643K 2750 0 rtable 186 16K 18K 78643K 2875 0 ifaddr 78 22K 24K 78643K 908 0 sysctl 3 1K 3K 78643K 7 0 counters 26 17K 17K 78643K 470 0 ioctlops 0 0K 4K 78643K 1536 0 iov 0 0K 28K 78643K 7346 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 4 0 vnodes 1554 97K 97K 78643K 8926 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 9K 78643K 91 0 VM map 2 0K 0K 78643K 2 0 sem 13 10K 20K 78643K 129 0 dirhash 6 1K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12548 0 file desc 16 57K 69K 78643K 9889 0 sigio 0 0K 0K 78643K 343 0 proc 61 59K 83K 78643K 2212 0 subproc 104 6K 6K 78643K 752 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 1 0K 0K 78643K 573 0 in_multi 63 4K 6K 78643K 974 0 ether_multi 1 0K 0K 78643K 63 0 mrt 2 0K 0K 78643K 32 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 223 996K 996K 78643K 223 0 exec 0 0K 1K 78643K 2486 0 pfkey data 0 0K 4K 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 356 91K 982K 78643K 64781 0 UVM aobj 131 4K 4K 78643K 135 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 329 0 NDP 14 0K 2K 78643K 335 0 temp 136 5770K 6810K 78643K 179830 0 kqueue 12 18K 26K 78643K 800 0 SYN cache 2 16K 16K 78643K 2 0 ddb> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle rtpcb 120 822 0 819 12 11 1 3 0 8 0 rtentry 112 839 0 765 4 0 4 4 0 8 0 unpcb 144 16252 0 16235 116 114 2 8 0 8 0 syncache 296 29 0 29 6 6 0 1 0 8 0 sackhl 24 1 0 1 1 1 0 1 0 8 0 tcpqe 32 109 0 109 6 6 0 1 0 8 0 tcpcb 776 4882 0 4878 144 140 4 14 0 8 3 arp 88 119 0 105 1 0 1 1 0 8 0 ipq 40 7 0 7 3 3 0 1 0 8 0 ipqe 40 28 0 28 3 3 0 1 0 8 0 inpcb 336 12932 0 12923 194 185 9 15 0 8 7 nd6 48 182 0 167 1 0 1 1 0 8 0 pkpcb 40 92 0 92 7 7 0 1 0 8 0 kcovpl 48 57 0 49 1 0 1 1 0 8 0 mppekey 1024 11 0 11 4 4 0 1 0 8 0 ppxss 1160 319 0 319 24 24 0 1 0 8 0 pppxif 1360 122 0 122 17 17 0 1 0 8 0 pfstscr 40 7 0 6 1 0 1 1 0 8 0 pfosfp 40 8 0 6 1 0 1 1 0 8 0 pfosfpen 112 8 0 6 1 0 1 1 0 8 0 pfanchor 1280 45 0 33 2 0 2 2 0 8 0 pfstitem 24 2 0 0 1 0 1 1 0 8 0 pfstkey 128 22 0 20 1 0 1 1 0 8 0 pfstate 352 11 0 10 1 0 1 1 0 8 0 rttmr 136 4 0 4 1 1 0 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 4272 0 3974 64 42 22 30 0 8 0 art_table 32 4273 0 3974 5 1 4 4 0 8 0 art_node 16 837 0 773 1 0 1 1 0 8 0 sysvmsgpl 40 4 0 0 1 0 1 1 0 8 0 semupl 112 1 0 1 1 1 0 1 0 8 0 semapl 112 119 0 108 1 0 1 1 0 8 0 shmpl 112 132 0 4 4 0 4 4 0 8 0 dirhash 1024 17 0 13 3 1 2 3 0 8 0 dino2pl 256 16778 0 15314 92 0 92 92 0 8 0 ffsino 240 16778 0 15314 87 0 87 87 0 8 0 nchpl 144 31494 0 29855 63 1 62 63 0 8 0 rtmask 32 3 0 3 1 1 0 1 0 8 0 uvmvnodes 80 6120 0 0 125 0 125 125 0 8 0 vnodes 216 6120 0 0 340 0 340 340 0 8 0 namei 1024 118004 0 118004 10 9 1 2 0 8 1 vmpool 664 40 0 40 11 11 0 1 0 8 0 kstatmem 264 360 0 332 12 9 3 3 0 8 0 scsiplug 72 5 0 5 2 2 0 1 0 8 0 scxspl 216 101664 0 101664 24 23 1 8 0 8 1 plimitpl 152 1493 0 1478 1 0 1 1 0 8 0 sigapl 424 10101 0 10054 8 2 6 8 0 8 0 futexpl 64 114599 0 114592 8 7 1 1 0 8 0 knotepl 120 136868 0 136788 79 75 4 11 0 8 0 kqueuepl 184 2419 0 2409 45 44 1 7 0 8 0 pipepl 288 3018 0 2990 57 54 3 11 0 8 0 fdescpl 432 10063 0 10036 4 0 4 4 0 8 0 filepl 120 93867 0 93622 162 149 13 19 0 8 3 lockfpl 104 2312 0 2309 4 3 1 2 0 8 0 lockfspl 48 807 0 804 1 0 1 1 0 8 0 sessionpl 144 77 0 61 1 0 1 1 0 8 0 pgrppl 48 130 0 114 1 0 1 1 0 8 0 ucredpl 104 13475 0 13464 1 0 1 1 0 8 0 zombiepl 144 10056 0 10054 5 4 1 1 0 8 0 processpl 1008 10101 0 10054 13 7 6 9 0 8 0 procpl 696 25489 0 25419 29 22 7 11 0 8 0 sosppl 168 100 0 100 19 18 1 1 0 8 1 sockpl 456 30237 0 30208 744 731 13 41 0 8 8 mcl64k 65536 299 0 299 26 26 0 1 0 8 0 mcl16k 16384 211 0 211 27 26 1 1 0 8 1 mcl12k 12288 355 0 355 26 25 1 1 0 8 1 mcl9k 9216 110 0 110 27 27 0 1 0 8 0 mcl8k 8192 720 0 720 26 25 1 1 0 8 1 mcl4k 4096 1377 0 1377 23 22 1 1 0 8 1 mcl2k2 2112 80 0 80 27 26 1 1 0 8 1 mcl2k 2048 96973 0 96902 75 65 10 34 0 8 0 mtagpl 96 1528 0 1369 19 15 4 11 0 8 0 mbufpl 256 262172 0 261797 860 829 31 233 0 8 0 bufpl 288 22464 0 16067 458 0 458 458 0 8 0 anonpl 24 1984355 0 1966703 249 124 125 168 0 188 0 amapchunkpl 152 582841 0 582084 6664 6633 31 4420 0 158 0 amappl16 200 19248 0 18666 146 114 32 44 0 8 0 amappl15 192 9 0 8 1 0 1 1 0 8 0 amappl14 184 346 0 335 2 0 2 2 0 8 0 amappl13 176 5 0 5 1 1 0 1 0 8 0 amappl12 168 992 0 988 1 0 1 1 0 8 0 amappl11 160 50 0 38 1 0 1 1 0 8 0 amappl10 152 77 0 69 1 0 1 1 0 8 0 amappl9 144 983 0 981 1 0 1 1 0 8 0 amappl8 136 433 0 346 4 0 4 4 0 8 0 amappl7 128 270 0 243 2 0 2 2 0 8 0 amappl6 120 401 0 389 1 0 1 1 0 8 0 amappl5 112 422 0 416 1 0 1 1 0 8 0 amappl4 104 1056 0 1030 2 1 1 2 0 8 0 amappl3 96 28189 0 28134 2 0 2 2 0 8 0 amappl2 88 11112 0 11040 3 1 2 3 0 8 0 amappl1 80 225056 0 224303 37 21 16 22 0 8 0 amappl 88 63634 0 63437 5 0 5 5 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 72 134 0 4 3 0 3 3 0 8 0 uaddrrnd 24 10103 0 10075 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 10103 0 10075 1 0 1 1 0 8 0 vmmpekpl 168 80357 0 80306 3 0 3 3 0 8 0 vmmpepl 168 930504 0 927639 378 241 137 155 0 357 1 vmsppl 272 10102 0 10075 3 1 2 2 0 8 0 rwobjpl 24 240615 0 232620 50 1 49 49 0 8 0 pdppl 4096 20212 0 20150 597 533 64 66 0 8 2 pvpl 32 3922864 0 3899545 558 351 207 304 0 265 0 pmappl 216 10102 0 10075 2 0 2 2 0 8 0 extentpl 40 56 0 38 1 0 1 1 0 8 0 phpool 112 2627 0 1841 31 6 25 29 0 8 0 ddb> machine ddbcpu 0 No such command ddb> trace memset() at memset+0x4e ffs_write(ffff80002b3e1020) at ffs_write+0x93c VOP_WRITE(fffffd806ce72648,ffff80002b3e10b8,23,fffffd807f7d79c0) at VOP_WRITE+0xbf sys/kern/vfs_vops.c:245 vn_rdwr(1,fffffd806ce72648,ffff80002b3e11a8,40,0,1,c63a68dff22a8779,0,ffff800021700848,fffffd806ce72648) at vn_rdwr+0xe9 sys/kern/vfs_vnops.c:324 acct_process(ffff800021700848) at acct_process+0x62c sys/kern/kern_acct.c:243 exit1(ffff800021700848,0,0,1) at exit1+0x387 sys/kern/kern_exit.c:209 sys_exit(ffff800021700848,ffff80002b3e1320,ffff80002b3e1370) at sys_exit+0x16 sys/kern/kern_exit.c:89 syscall(ffff80002b3e13f0) at syscall+0x446 sys/arch/amd64/amd64/trap.c:599 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffd5dd0, count: -9 ddb> machine ddbcpu 1 No such command ddb> trace memset() at memset+0x4e ffs_write(ffff80002b3e1020) at ffs_write+0x93c VOP_WRITE(fffffd806ce72648,ffff80002b3e10b8,23,fffffd807f7d79c0) at VOP_WRITE+0xbf sys/kern/vfs_vops.c:245 vn_rdwr(1,fffffd806ce72648,ffff80002b3e11a8,40,0,1,c63a68dff22a8779,0,ffff800021700848,fffffd806ce72648) at vn_rdwr+0xe9 sys/kern/vfs_vnops.c:324 acct_process(ffff800021700848) at acct_process+0x62c sys/kern/kern_acct.c:243 exit1(ffff800021700848,0,0,1) at exit1+0x387 sys/kern/kern_exit.c:209 sys_exit(ffff800021700848,ffff80002b3e1320,ffff80002b3e1370) at sys_exit+0x16 sys/kern/kern_exit.c:89 syscall(ffff80002b3e13f0) at syscall+0x446 sys/arch/amd64/amd64/trap.c:599 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffd5dd0, count: -9