uvm_fault(0xffffffff83978050, 0xffff800029792000, 0, 2) -> d kernel: page fault trap, code=2 Stopped at memset+0x52: repe stosq %es:(%rdi) TID PID UID PRFLAGS PFLAGS CPU COMMAND memset() at memset+0x52 VOP_WRITE(fffffd806d0eab30,ffff80002a7a5030,0,fffffd8007ffd888) at VOP_WRITE+0x101 sys/kern/vfs_vops.c:245 uvn_io(fffffd806f71ecd8,ffff80002a7a51b0,a,39,1) at uvn_io+0x485 sys/uvm/uvm_vnode.c:1232 uvm_pager_put(fffffd806f71ecd8,fffffd8007a8db00,ffff80002a7a5250,ffff80002a7a5274,39,0,9fadd1bd7120821a) at uvm_pager_put+0x10a sys/uvm/uvm_pager.c:505 uvn_flush(fffffd806f71ecd8,0,0,19) at uvn_flush+0x68d sys/uvm/uvm_vnode.c:705 uvn_detach(fffffd806f71ecd8) at uvn_detach+0xb8 sys/uvm/uvm_vnode.c:344 uvm_unmap_detach(ffff80002a7a5380,0) at uvm_unmap_detach+0x15e sys/uvm/uvm_map.c:1370 uvm_map_teardown(fffffd807ecdd000) at uvm_map_teardown+0x357 sys/uvm/uvm_map.c:2536 exit1(ffff80002a776d08,43,0,1) at exit1+0x6e6 sys/kern/kern_exit.c:259 sys_exit(ffff80002a776d08,ffff80002a7a5540,ffff80002a7a5490) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80002a7a5540) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80002a7a5540) at syscall+0x962 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7011d29b5520, count: 3 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(0xffffffff83978050, 0xffff800029792000, 0, 2) -> d ddb> trace memset() at memset+0x52 VOP_WRITE(fffffd806d0eab30,ffff80002a7a5030,0,fffffd8007ffd888) at VOP_WRITE+0x101 sys/kern/vfs_vops.c:245 uvn_io(fffffd806f71ecd8,ffff80002a7a51b0,a,39,1) at uvn_io+0x485 sys/uvm/uvm_vnode.c:1232 uvm_pager_put(fffffd806f71ecd8,fffffd8007a8db00,ffff80002a7a5250,ffff80002a7a5274,39,0,9fadd1bd7120821a) at uvm_pager_put+0x10a sys/uvm/uvm_pager.c:505 uvn_flush(fffffd806f71ecd8,0,0,19) at uvn_flush+0x68d sys/uvm/uvm_vnode.c:705 uvn_detach(fffffd806f71ecd8) at uvn_detach+0xb8 sys/uvm/uvm_vnode.c:344 uvm_unmap_detach(ffff80002a7a5380,0) at uvm_unmap_detach+0x15e sys/uvm/uvm_map.c:1370 uvm_map_teardown(fffffd807ecdd000) at uvm_map_teardown+0x357 sys/uvm/uvm_map.c:2536 exit1(ffff80002a776d08,43,0,1) at exit1+0x6e6 sys/kern/kern_exit.c:259 sys_exit(ffff80002a776d08,ffff80002a7a5540,ffff80002a7a5490) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80002a7a5540) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80002a7a5540) at syscall+0x962 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7011d29b5520, count: -12 ddb> show registers rdi 0xffff800029792000 rsi 0 rbp 0xffff80002a7a4f90 rbx 0xe rdx 0 rcx 0x800 rax 0 r8 0x4000 __ALIGN_SIZE+0x3000 r9 0xffff80002a7a4e18 r10 0xeb50bf5127c114c4 r11 0xffff800029792000 r12 0x4000 __ALIGN_SIZE+0x3000 r13 0x4000 __ALIGN_SIZE+0x3000 r14 0xffff800029792000 r15 0x4000 __ALIGN_SIZE+0x3000 rip 0xffffffff81991982 memset+0x52 cs 0x8 rflags 0x10206 __ALIGN_SIZE+0xf206 rsp 0xffff80002a7a4ec8 ss 0x10 memset+0x52: repe stosq %es:(%rdi) ddb> show proc PROC (syz-executor) tid=93602 pid=75465 tcnt=0 stat=onproc flags process=a proc=2000 runpri=50, usrpri=86, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=1 forw=0xffffffffffffffff, list=0xffff80002a777238,0xffff80002a746a78 process=0xffff80002a7adb10 user=0xffff80002a7a0000, vmspace=0xfffffd807ecdd000 estcpu=36, cpticks=30, pctcpu=0.1, user=0, sys=3, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 55875 209719 0 0 3 0x14280 nfsidl nfsio 65502 126970 0 0 3 0x14280 nfsidl nfsio 62911 404847 0 0 3 0x14280 nfsidl nfsio 65002 35867 0 0 3 0x14280 nfsidl nfsio 75988 48287 0 0 3 0x14280 nfsidl nfsio 93397 409881 0 0 3 0x14280 nfsidl nfsio 37493 509853 0 0 3 0x14280 nfsidl nfsio 25803 354511 0 0 3 0x14280 nfsidl nfsio 58769 318382 0 0 3 0x14280 nfsidl nfsio 44279 408661 0 0 3 0x14280 nfsidl nfsio 57537 306625 0 0 3 0x14280 nfsidl nfsio 28658 77003 0 0 3 0x14280 nfsidl nfsio 79754 92754 0 0 3 0x14280 nfsidl nfsio 67460 33328 0 0 3 0x14280 nfsidl nfsio 39787 110030 0 0 3 0x14280 nfsidl nfsio 94323 380430 0 0 3 0x14280 nfsidl nfsio 71532 369950 0 0 3 0x14280 nfsidl nfsio 66812 356662 0 0 3 0x14280 nfsidl nfsio 4776 470601 0 0 3 0x14280 nfsidl nfsio 11485 26083 0 0 3 0x14280 nfsidl nfsio 29762 210950 0 0 3 0x14200 acct acct 2472 420969 1 0 3 0x100083 ttyin getty 9461 257216 99644 0 2 0x10 sshd-session 99644 149182 2515 0 3 0x92 kqread sshd-session 2515 5216 1 0 3 0x88 kqread sshd 33691 173295 92286 73 3 0x1100090 kqread syslogd 92286 363933 1 0 3 0x100082 sbwait syslogd 6903 327071 1 0 3 0x100080 kqread resolvd 95211 279725 64647 77 3 0x100092 kqread dhcpleased 95388 16883 64647 77 3 0x100092 kqread dhcpleased 64647 341967 1 0 3 0x80 kqread dhcpleased 56516 408735 0 0 3 0x14200 bored smr 7746 325408 0 0 2 0x14200 zerothread 94688 46320 0 0 3 0x14200 aiodoned aiodoned 76357 364914 0 0 3 0x14200 syncer update 86171 355042 0 0 3 0x14200 cleaner cleaner 55887 212016 0 0 3 0x14200 reaper reaper 20368 212746 0 0 3 0x14200 pgdaemon pagedaemon 74283 381777 0 0 3 0x14200 bored viomb 99301 141816 0 0 3 0x40014200 acpi0 acpi0 16592 348594 0 0 2 0x14200 softnet0 13070 67839 0 0 3 0x14200 smrbar systqmp 35065 81896 0 0 3 0x14200 bored systq 34158 148162 0 0 3 0x40014200 tmoslp softclock 15396 128524 0 0 3 0x40014200 idle0 1 283492 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 11025 12100K 12496K 166960K 12870 0 pcb 17 14K 16K 166960K 265 0 rtable 84 4K 8K 166960K 1057 0 pf 18 11K 19K 166960K 247 0 ifaddr 15 2K 7K 166960K 148 0 ifgroup 26 1K 2K 166960K 168 0 sysctl 3 1K 9K 166960K 11 0 counters 27 17K 18K 166960K 69 0 ioctlops 0 0K 4K 166960K 338 0 iov 0 0K 16K 166960K 16 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1353 85K 85K 166960K 2146 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 3 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 101 0 dirhash 12 2K 2K 166960K 15 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 2 4K 97K 166960K 954 0 sigio 0 0K 0K 166960K 5 0 proc 60 59K 108K 166960K 1158 0 subproc 9 0K 4K 166960K 261 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 53 0 in_multi 22 1K 7K 166960K 340 0 ether_multi 1 0K 0K 166960K 3 0 mrt 1 0K 0K 166960K 20 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 103 466K 466K 166960K 103 0 exec 0 0K 1K 166960K 704 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 0K 166960K 1 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 101 83K 177K 166960K 9141 0 UVM aobj 21 2K 4K 166960K 24 0 pinsyscall 22 44K 96K 166960K 2625 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 18 0 NDP 5 0K 2K 166960K 103 0 temp 22 9064K 9130K 166960K 17034 0 kqueue 12 18K 31K 166960K 117 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 120 110 0 107 1 0 1 1 0 8 0 rtentry 136 348 0 325 4 0 4 4 0 8 2 unpcb 144 856 0 841 11 5 6 6 0 8 5 syncache 336 5 0 5 2 1 1 1 0 8 1 tcpqe 32 3 0 3 1 0 1 1 0 8 1 tcpcb 736 192 0 186 7 6 1 7 0 8 0 arp 96 60 0 56 1 0 1 1 0 8 0 ipq 40 3 0 2 1 0 1 1 0 8 0 ipqe 40 4 0 3 1 0 1 1 0 8 0 inpcb 328 653 0 644 13 6 7 7 0 8 6 ip6q 72 3 0 0 1 0 1 1 0 8 0 ip6af 40 3 0 0 1 0 1 1 0 8 0 nd6 112 88 0 85 1 0 1 1 0 8 0 pkpcb 40 4 0 4 2 1 1 1 0 8 1 kcovpl 48 29 0 28 1 0 1 1 0 8 0 ppxss 1072 12 0 12 2 1 1 1 0 8 1 pppxif 1416 1 0 1 1 0 1 1 0 8 1 pfrktable 1344 2 0 2 1 1 0 1 0 8 0 pfsrclim 320 1 0 0 1 0 1 1 0 8 0 pfanchor 1288 7 0 1 1 0 1 1 0 8 0 pftag 88 3 0 1 2 1 1 1 0 8 0 pfqueue 320 1 0 1 1 0 1 1 0 8 1 pfrule 1360 8 0 7 2 1 1 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 1447 0 1267 29 5 24 29 0 8 10 art_table 40 1448 0 1267 5 0 5 5 0 8 0 art_node 32 347 0 327 1 0 1 1 0 8 0 sysvmsgpl 40 11 0 7 1 0 1 1 0 8 0 semupl 112 1 0 1 1 1 0 1 0 8 0 semapl 112 98 0 88 1 0 1 1 0 8 0 shmpl 112 21 0 3 1 0 1 1 0 8 0 dirhash 1024 19 0 2 3 0 3 3 0 8 0 dino2pl 256 2594 0 1109 94 0 94 94 0 8 0 ffsino 256 2598 0 1113 94 0 94 94 0 8 0 nchpl 144 3525 0 1763 66 0 66 66 0 8 0 rtmask 32 1 0 1 1 0 1 1 0 8 1 vnodes 216 3204 0 0 178 0 178 178 0 8 0 namei 1024 12802 0 12802 3 2 1 2 0 8 1 kstatmem 264 90 0 80 2 0 2 2 0 8 0 scsiplug 72 1 0 1 1 1 0 1 0 8 0 scxspl 216 18783 0 18783 11 7 4 8 1 8 4 plimitpl 152 211 0 197 1 0 1 1 0 8 0 sigapl 424 1229 0 1175 9 1 8 8 0 8 1 knotepl 120 20500 0 20469 24 14 10 17 0 8 7 kqueuepl 184 257 0 249 3 0 3 3 0 8 2 pipepl 304 250 0 246 3 0 3 3 0 8 1 fdescpl 448 1195 0 1182 5 1 4 5 0 8 1 filepl 120 6052 0 5986 17 4 13 13 0 8 7 lockfpl 104 199 0 197 1 0 1 1 0 8 0 lockfspl 48 87 0 85 1 0 1 1 0 8 0 sessionpl 144 64 0 56 1 0 1 1 0 8 0 pgrppl 48 104 0 89 1 0 1 1 0 8 0 ucredpl 104 973 0 962 1 0 1 1 0 8 0 zombiepl 144 1183 0 1175 1 0 1 1 0 8 0 processpl 1152 1229 0 1175 5 0 5 5 0 8 0 procpl 664 1966 0 1912 8 1 7 7 0 8 1 sosppl 176 2 0 2 2 1 1 1 0 8 1 sockpl 552 1670 0 1643 26 16 10 16 0 8 7 mcl64k 65536 166 0 166 1 0 1 1 0 8 1 mcl16k 16384 2 0 2 1 1 0 1 0 8 0 mcl9k 9216 3 0 3 1 0 1 1 0 8 1 mcl8k 8192 42 0 42 2 1 1 1 0 8 1 mcl4k 4096 3263 0 3208 15 6 9 14 0 8 0 mcl2k 2048 939 0 938 5 3 2 4 0 8 1 mtagpl 96 12 0 12 1 0 1 1 0 8 1 mbufpl 256 13527 0 13454 82 63 19 75 0 8 8 bufpl 280 7417 0 1203 444 0 444 444 0 8 0 anonpl 24 194628 0 192811 60 17 43 57 0 187 10 amapchunkpl 152 28402 0 28268 34 8 26 26 0 158 14 amappl16 200 3161 0 3153 17 9 8 14 0 8 6 amappl15 192 7 0 7 1 1 0 1 0 8 0 amappl14 184 658 0 658 1 0 1 1 0 8 1 amappl13 176 164 0 154 1 0 1 1 0 8 0 amappl12 168 1531 0 1519 2 0 2 2 0 8 0 amappl11 160 10 0 9 1 0 1 1 0 8 0 amappl10 152 81 0 71 1 0 1 1 0 8 0 amappl9 144 259 0 259 1 1 0 1 0 8 0 amappl8 136 225 0 224 1 0 1 1 0 8 0 amappl7 128 197 0 186 1 0 1 1 0 8 0 amappl6 120 361 0 361 1 0 1 1 0 8 1 amappl5 112 95 0 86 1 0 1 1 0 8 0 amappl4 104 351 0 336 1 0 1 1 0 8 0 amappl3 96 5546 0 5512 4 0 4 4 0 8 1 amappl2 88 709 0 657 2 0 2 2 0 8 0 amappl1 80 14899 0 14438 15 0 15 15 0 8 2 amappl 88 7975 0 7928 5 1 4 5 0 92 0 uvmvnodes 80 123 0 0 3 0 3 3 0 8 0 dma16384 16384 1 0 1 1 0 1 1 0 8 1 dma4096 4096 2 0 2 2 1 1 1 0 8 1 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 1 1 1 0 8 1 dma128 128 254 0 254 1 1 0 1 0 8 0 dma64 64 8 0 8 2 1 1 1 0 8 1 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 23 0 3 1 0 1 1 0 8 0 uaddrrnd 24 1195 0 1182 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1195 0 1182 1 0 1 1 0 8 0 vmmpekpl 168 10989 0 10963 3 0 3 3 0 8 0 vmmpepl 168 84072 0 83025 102 13 89 92 0 357 23 vmsppl 368 1194 0 1181 4 1 3 4 0 8 0 rwobjpl 40 25108 0 24378 13 0 13 13 0 8 0 pdppl 4096 2396 0 2362 116 56 60 82 0 8 26 pvpl 32 529417 0 524726 141 36 105 131 0 265 37 pmappl 216 1194 0 1181 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 473 0 150 12 0 12 12 0 8 0 ddb> machine ddbcpu 0 No such command ddb> trace memset() at memset+0x52 VOP_WRITE(fffffd806d0eab30,ffff80002a7a5030,0,fffffd8007ffd888) at VOP_WRITE+0x101 sys/kern/vfs_vops.c:245 uvn_io(fffffd806f71ecd8,ffff80002a7a51b0,a,39,1) at uvn_io+0x485 sys/uvm/uvm_vnode.c:1232 uvm_pager_put(fffffd806f71ecd8,fffffd8007a8db00,ffff80002a7a5250,ffff80002a7a5274,39,0,9fadd1bd7120821a) at uvm_pager_put+0x10a sys/uvm/uvm_pager.c:505 uvn_flush(fffffd806f71ecd8,0,0,19) at uvn_flush+0x68d sys/uvm/uvm_vnode.c:705 uvn_detach(fffffd806f71ecd8) at uvn_detach+0xb8 sys/uvm/uvm_vnode.c:344 uvm_unmap_detach(ffff80002a7a5380,0) at uvm_unmap_detach+0x15e sys/uvm/uvm_map.c:1370 uvm_map_teardown(fffffd807ecdd000) at uvm_map_teardown+0x357 sys/uvm/uvm_map.c:2536 exit1(ffff80002a776d08,43,0,1) at exit1+0x6e6 sys/kern/kern_exit.c:259 sys_exit(ffff80002a776d08,ffff80002a7a5540,ffff80002a7a5490) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80002a7a5540) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80002a7a5540) at syscall+0x962 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7011d29b5520, count: -12 ddb> machine ddbcpu 1 No such command ddb> trace memset() at memset+0x52 VOP_WRITE(fffffd806d0eab30,ffff80002a7a5030,0,fffffd8007ffd888) at VOP_WRITE+0x101 sys/kern/vfs_vops.c:245 uvn_io(fffffd806f71ecd8,ffff80002a7a51b0,a,39,1) at uvn_io+0x485 sys/uvm/uvm_vnode.c:1232 uvm_pager_put(fffffd806f71ecd8,fffffd8007a8db00,ffff80002a7a5250,ffff80002a7a5274,39,0,9fadd1bd7120821a) at uvm_pager_put+0x10a sys/uvm/uvm_pager.c:505 uvn_flush(fffffd806f71ecd8,0,0,19) at uvn_flush+0x68d sys/uvm/uvm_vnode.c:705 uvn_detach(fffffd806f71ecd8) at uvn_detach+0xb8 sys/uvm/uvm_vnode.c:344 uvm_unmap_detach(ffff80002a7a5380,0) at uvm_unmap_detach+0x15e sys/uvm/uvm_map.c:1370 uvm_map_teardown(fffffd807ecdd000) at uvm_map_teardown+0x357 sys/uvm/uvm_map.c:2536 exit1(ffff80002a776d08,43,0,1) at exit1+0x6e6 sys/kern/kern_exit.c:259 sys_exit(ffff80002a776d08,ffff80002a7a5540,ffff80002a7a5490) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80002a7a5540) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80002a7a5540) at syscall+0x962 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7011d29b5520, count: -12