uvm_fault(0xffffffff8392fef0, 0xffff800028294980, 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 ffs_write(ffff80002a801580) at ffs_write+0xb9a sys/ufs/ffs/ffs_vnops.c:401 VOP_WRITE(fffffd805eae2b08,ffff80002a801618,23,fffffd8007bfb6e8) at VOP_WRITE+0x101 sys/kern/vfs_vops.c:245 vn_rdwr(1,fffffd805eae2b08,ffff80002a801750,40,0,1,37be489069577fd2,0,1008,0) at vn_rdwr+0x12d sys/kern/vfs_vnops.c:324 acct_process(ffff80003c9447f0) at acct_process+0x7a2 sys/kern/kern_acct.c:245 exit1(ffff80003c9447f0,0,0,1) at exit1+0x5c4 sys/kern/kern_exit.c:228 sys_exit(ffff80003c9447f0,ffff80002a801980,ffff80002a8018d0) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80002a801980) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80002a801980) at syscall+0x962 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x76cfba968b70, 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(0xffffffff8392fef0, 0xffff800028294980, 0, 2) -> d ddb> trace memset() at memset+0x52 ffs_write(ffff80002a801580) at ffs_write+0xb9a sys/ufs/ffs/ffs_vnops.c:401 VOP_WRITE(fffffd805eae2b08,ffff80002a801618,23,fffffd8007bfb6e8) at VOP_WRITE+0x101 sys/kern/vfs_vops.c:245 vn_rdwr(1,fffffd805eae2b08,ffff80002a801750,40,0,1,37be489069577fd2,0,1008,0) at vn_rdwr+0x12d sys/kern/vfs_vnops.c:324 acct_process(ffff80003c9447f0) at acct_process+0x7a2 sys/kern/kern_acct.c:245 exit1(ffff80003c9447f0,0,0,1) at exit1+0x5c4 sys/kern/kern_exit.c:228 sys_exit(ffff80003c9447f0,ffff80002a801980,ffff80002a8018d0) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80002a801980) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80002a801980) at syscall+0x962 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x76cfba968b70, count: -9 ddb> show registers rdi 0xffff800028294980 rsi 0 rbp 0xffff80002a8014a0 rbx 0x6980 __ALIGN_SIZE+0x5980 rdx 0 rcx 0xd0 rax 0 r8 0x680 r9 0xffff80002a801400 r10 0x522a480e8dd1532b r11 0xffff800028294980 r12 0x2980 __ALIGN_SIZE+0x1980 r13 0x3000 __ALIGN_SIZE+0x2000 r14 0xfffffd805eae2b08 r15 0x1 rip 0xffffffff82cb2e92 memset+0x52 cs 0x8 rflags 0x10202 __ALIGN_SIZE+0xf202 rsp 0xffff80002a801298 ss 0 memset+0x52: repe stosq %es:(%rdi) ddb> show proc PROC (syz-executor) tid=258150 pid=14371 tcnt=0 stat=onproc flags process=1008 proc=2000 runpri=16, usrpri=86, slppri=16, nice=20 wchan=0x0, wmesg=, ps_single=0xffff80003c9447f0 scnt=-1 ecnt=1 forw=0xffffffffffffffff, list=0xffff80003c9454e8,0xffff80003c9442d0 process=0xffff80002a860da0 user=0xffff80002a7fc000, vmspace=0xfffffd806b785e78 estcpu=36, cpticks=4, pctcpu=0.0, user=0, sys=1, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 16117 372414 15669 0 2 0 syz-executor 16117 321209 15669 0 2 0x4000000 syz-executor 99098 301640 30161 -1 2 0x10 syz-executor 99098 392791 30161 -1 3 0x4000090 kqsel syz-executor 99098 405961 30161 -1 3 0x4000090 fsleep syz-executor 97513 259342 75835 0 2 0 syz-executor 55443 459362 49698 0 2 0 syz-executor 55443 113226 49698 0 3 0x4000080 fsleep syz-executor 22159 338167 43464 0 2 0 syz-executor 22159 249620 43464 0 3 0x4000080 fsleep syz-executor 63038 464618 29418 0 2 0 syz-executor 63038 257258 29418 0 3 0x4000080 fsleep syz-executor 63038 364513 29418 0 2 0x4000000 syz-executor 43464 281586 66996 0 2 0xc82 syz-executor 29418 43928 66996 0 2 0xc82 syz-executor 46206 312868 0 0 3 0x14200 acct acct 75835 331934 66996 0 2 0xc82 syz-executor 48254 517445 0 0 3 0x14280 nfsidl nfsio 27466 93018 0 0 3 0x14280 nfsidl nfsio 40539 237707 0 0 3 0x14280 nfsidl nfsio 15077 427423 0 0 3 0x14280 nfsidl nfsio 61598 148171 0 0 3 0x14280 nfsidl nfsio 30795 319491 0 0 3 0x14280 nfsidl nfsio 28990 419018 0 0 3 0x14280 nfsidl nfsio 61505 507733 0 0 3 0x14280 nfsidl nfsio 57532 72032 0 0 3 0x14280 nfsidl nfsio 38958 201662 0 0 3 0x14280 nfsidl nfsio 13664 65305 0 0 3 0x14280 nfsidl nfsio 78310 159606 0 0 3 0x14280 nfsidl nfsio 81056 120247 0 0 3 0x14280 nfsidl nfsio 14135 463114 0 0 3 0x14280 nfsidl nfsio 22039 137155 0 0 3 0x14280 nfsidl nfsio 14880 308259 0 0 3 0x14280 nfsidl nfsio 96151 355694 0 0 3 0x14280 nfsidl nfsio 84518 114153 0 0 3 0x14280 nfsidl nfsio 11411 66107 0 0 3 0x14280 nfsidl nfsio 17891 521096 0 0 3 0x14280 nfsidl nfsio 52218 229985 1 0 3 0x100083 ttyin getty 66741 145858 66996 0 2 0xc82 syz-executor 87276 408124 0 0 3 0x14200 bored sosplice 61485 426168 66996 0 3 0x82 wait syz-executor 49698 35505 66996 0 2 0xc82 syz-executor 15669 349809 66996 0 3 0x82 nanoslp syz-executor 30161 61317 66996 0 3 0x82 nanoslp syz-executor 66996 240143 38008 0 3 0x82 kqread syz-executor 38008 27 57500 0 3 0x10008a sigsusp ksh 57500 421757 82639 0 3 0x98 kqread sshd-session 82639 402406 98721 0 3 0x92 kqread sshd-session 98721 323029 1 0 3 0x88 kqread sshd 36038 384074 59683 73 3 0x1100090 kqread syslogd 59683 60043 1 0 3 0x100082 sbwait syslogd 93514 490758 1 0 3 0x100080 kqread resolvd 52639 345577 33706 77 3 0x100092 kqread dhcpleased 62907 245653 33706 77 3 0x100092 kqread dhcpleased 33706 64188 1 0 3 0x80 kqread dhcpleased 72158 451550 0 0 3 0x14200 bored smr 52765 461993 0 0 2 0x14200 zerothread 52475 235413 0 0 3 0x14200 aiodoned aiodoned 20862 425557 0 0 3 0x14200 syncer update 80555 411572 0 0 3 0x14200 cleaner cleaner 79171 520688 0 0 3 0x14200 reaper reaper 63286 284209 0 0 3 0x14200 pgdaemon pagedaemon 26139 420349 0 0 3 0x14200 bored viomb 79212 164102 0 0 3 0x40014200 acpi0 acpi0 58542 238643 0 0 3 0x14200 bored softnet0 76016 277132 0 0 3 0x14200 bored systqmp 77451 400661 0 0 3 0x14200 bored systq 48195 259512 0 0 2 0x40014200 softclock 67417 203104 0 0 3 0x40014200 idle0 1 51150 0 0 3 0x80082 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 10186 11179K 12417K 166960K 13540 0 pcb 17 16K 18K 166960K 561 0 rtable 185 10K 10K 166960K 692 0 pf 31 13K 17K 166960K 135 0 ifaddr 36 6K 8K 166960K 118 0 ifgroup 46 2K 2K 166960K 162 0 sysctl 4 1K 9K 166960K 25 0 counters 31 17K 18K 166960K 98 0 ioctlops 0 0K 4K 166960K 645 0 iov 0 0K 28K 166960K 211 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1523 96K 96K 166960K 2942 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 9K 166960K 17 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 1K 166960K 111 0 dirhash 12 2K 2K 166960K 39 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 17 61K 240K 166960K 1465 0 sigio 0 0K 0K 166960K 31 0 proc 60 59K 91K 166960K 717 0 subproc 72 4K 4K 166960K 109 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 411 0 in_multi 69 4K 7K 166960K 225 0 ether_multi 1 0K 0K 166960K 23 0 mrt 2 0K 0K 166960K 19 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 554 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 0K 166960K 3 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 224 143K 159K 166960K 13763 0 UVM aobj 131 6K 6K 166960K 132 0 pinsyscall 39 78K 90K 166960K 2561 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 102 0 NDP 10 0K 2K 166960K 72 0 temp 77 8648K 8904K 166960K 42555 0 kqueue 13 20K 32K 166960K 281 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 120 181 0 178 2 1 1 2 0 8 0 rtentry 136 174 0 110 4 0 4 4 0 8 0 unpcb 144 1018 0 1003 6 5 1 6 0 8 0 syncache 336 8 0 8 1 1 0 1 0 8 0 tcpcb 736 651 0 644 7 6 1 7 0 8 0 arp 96 21 0 9 1 0 1 1 0 8 0 ipq 40 1 0 1 1 1 0 1 0 8 0 ipqe 40 2 0 2 1 1 0 1 0 8 0 inpcb 328 1840 0 1830 10 8 2 10 0 8 0 ip6q 72 8 0 0 1 0 1 1 0 8 0 ip6af 40 9 0 0 1 0 1 1 0 8 0 nd6 112 31 0 17 1 0 1 1 0 8 0 pkpcb 40 12 0 12 1 1 0 1 0 8 0 kcovpl 48 12 0 4 1 0 1 1 0 8 0 ppxss 1072 50 0 50 1 1 0 1 0 8 0 pppxif 1384 7 0 7 1 1 0 1 0 8 0 pfrktable 1344 3 0 3 1 1 0 1 0 8 0 pftag 88 1 0 0 1 0 1 1 0 8 0 pfstitem 24 7 0 0 1 0 1 1 0 8 0 pfstkey 128 77 0 70 1 0 1 1 0 8 0 pfstate 384 71 0 67 1 0 1 1 0 8 0 pfrule 1344 11 0 11 1 1 0 1 0 8 0 rttmr 136 3 0 3 1 1 0 1 0 8 0 art_heap8 4096 2 0 0 2 0 2 2 0 8 0 art_heap4 256 865 0 568 29 7 22 29 0 8 0 art_table 40 867 0 568 5 0 5 5 0 8 0 art_node 32 170 0 118 1 0 1 1 0 8 0 sysvmsgpl 40 6 0 4 1 0 1 1 0 8 0 semupl 112 1 0 1 1 1 0 1 0 8 0 semapl 112 107 0 97 1 0 1 1 0 8 0 shmpl 112 129 0 1 4 0 4 4 0 8 0 dirhash 1024 35 0 18 3 0 3 3 0 8 0 dino2pl 256 3935 0 2429 95 0 95 95 0 8 0 ffsino 256 3935 0 2429 95 0 95 95 0 8 0 nchpl 144 5921 0 4228 64 0 64 64 0 8 0 rtmask 32 15 0 15 1 1 0 1 0 8 0 uvmvnodes 80 5094 0 0 104 0 104 104 0 8 0 vnodes 216 5094 0 0 283 0 283 283 0 8 0 namei 1024 22318 0 22318 2 1 1 2 0 8 1 kstatmem 264 96 0 76 2 0 2 2 0 8 0 acpiwqpl 32 1 0 1 1 0 1 1 1 8 1 scsiplug 72 10 0 10 1 1 0 1 0 8 0 scxspl 216 25680 0 25680 8 7 1 8 1 8 1 plimitpl 152 524 0 506 1 0 1 1 0 8 0 sigapl 424 1720 0 1655 8 0 8 8 0 8 0 knotepl 120 66637 0 66590 16 11 5 16 0 8 0 kqueuepl 184 561 0 551 4 3 1 4 0 8 0 pipepl 304 238 0 211 3 0 3 3 0 8 0 fdescpl 448 1681 0 1652 4 0 4 4 0 8 0 filepl 120 11953 0 11736 13 3 10 13 0 8 0 lockfpl 104 681 0 678 3 1 2 2 0 8 1 lockfspl 48 270 0 267 1 0 1 1 0 8 0 sessionpl 144 27 0 19 1 0 1 1 0 8 0 pgrppl 48 100 0 84 1 0 1 1 0 8 0 ucredpl 104 1509 0 1497 1 0 1 1 0 8 0 zombiepl 144 1657 0 1655 1 0 1 1 0 8 0 processpl 1152 1720 0 1655 5 0 5 5 0 8 0 procpl 664 3576 0 3504 8 1 7 8 0 8 0 sosppl 168 8 0 8 1 0 1 1 0 8 1 sockpl 552 3088 0 3060 13 10 3 13 0 8 0 mcl64k 65536 187 0 185 1 0 1 1 0 8 0 mcl16k 16384 9 0 9 1 1 0 1 0 8 0 mcl8k 8192 14 0 14 1 1 0 1 0 8 0 mcl4k 4096 4132 0 4080 15 7 8 15 0 8 1 mcl2k2 2112 14 0 14 1 1 0 1 0 8 0 mcl2k 2048 2415 0 2405 8 5 3 8 0 8 0 mtagpl 96 11 0 11 1 1 0 1 0 8 0 mbufpl 256 18400 0 18286 27 17 10 27 0 8 0 bufpl 280 9647 0 3419 446 0 446 446 0 8 0 anonpl 24 240684 0 237007 59 21 38 59 0 187 0 amapchunkpl 152 47602 0 47097 37 15 22 37 0 158 0 amappl16 200 4343 0 4306 35 30 5 16 0 8 0 amappl15 192 5 0 5 1 1 0 1 0 8 0 amappl14 184 114 0 104 1 0 1 1 0 8 0 amappl13 176 2 0 2 1 1 0 1 0 8 0 amappl12 168 2353 0 2323 3 1 2 3 0 8 0 amappl11 160 54 0 44 1 0 1 1 0 8 0 amappl10 152 5 0 5 1 1 0 1 0 8 0 amappl9 144 280 0 280 1 1 0 1 0 8 0 amappl8 136 15 0 13 1 0 1 1 0 8 0 amappl7 128 112 0 101 1 0 1 1 0 8 0 amappl6 120 205 0 202 1 0 1 1 0 8 0 amappl5 112 137 0 130 1 0 1 1 0 8 0 amappl4 104 290 0 274 1 0 1 1 0 8 0 amappl3 96 8198 0 8105 3 0 3 3 0 8 0 amappl2 88 1935 0 1860 2 0 2 2 0 8 0 amappl1 80 13500 0 12949 13 1 12 13 0 8 0 amappl 88 12796 0 12634 5 0 5 5 0 92 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 2 0 1 1 0 1 1 0 8 0 dma256 256 8 0 8 1 1 0 1 0 8 0 dma128 128 256 0 256 1 1 0 1 0 8 0 dma64 64 8 0 8 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 72 131 0 1 3 0 3 3 0 8 0 uaddrrnd 24 1681 0 1651 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1681 0 1651 1 0 1 1 0 8 0 vmmpekpl 168 13248 0 13196 3 0 3 3 0 8 0 vmmpepl 168 107214 0 105291 97 6 91 97 0 357 0 vmsppl 368 1680 0 1651 4 1 3 4 0 8 0 rwobjpl 40 32662 0 26579 62 0 62 62 0 8 0 pdppl 4096 3368 0 3302 100 34 66 76 0 8 0 pvpl 32 705887 0 696505 144 43 101 144 0 265 1 pmappl 216 1680 0 1651 2 0 2 2 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 399 0 84 11 0 11 11 0 8 0 ddb> machine ddbcpu 0 No such command ddb> trace memset() at memset+0x52 ffs_write(ffff80002a801580) at ffs_write+0xb9a sys/ufs/ffs/ffs_vnops.c:401 VOP_WRITE(fffffd805eae2b08,ffff80002a801618,23,fffffd8007bfb6e8) at VOP_WRITE+0x101 sys/kern/vfs_vops.c:245 vn_rdwr(1,fffffd805eae2b08,ffff80002a801750,40,0,1,37be489069577fd2,0,1008,0) at vn_rdwr+0x12d sys/kern/vfs_vnops.c:324 acct_process(ffff80003c9447f0) at acct_process+0x7a2 sys/kern/kern_acct.c:245 exit1(ffff80003c9447f0,0,0,1) at exit1+0x5c4 sys/kern/kern_exit.c:228 sys_exit(ffff80003c9447f0,ffff80002a801980,ffff80002a8018d0) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80002a801980) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80002a801980) at syscall+0x962 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x76cfba968b70, count: -9 ddb> machine ddbcpu 1 No such command ddb> trace memset() at memset+0x52 ffs_write(ffff80002a801580) at ffs_write+0xb9a sys/ufs/ffs/ffs_vnops.c:401 VOP_WRITE(fffffd805eae2b08,ffff80002a801618,23,fffffd8007bfb6e8) at VOP_WRITE+0x101 sys/kern/vfs_vops.c:245 vn_rdwr(1,fffffd805eae2b08,ffff80002a801750,40,0,1,37be489069577fd2,0,1008,0) at vn_rdwr+0x12d sys/kern/vfs_vnops.c:324 acct_process(ffff80003c9447f0) at acct_process+0x7a2 sys/kern/kern_acct.c:245 exit1(ffff80003c9447f0,0,0,1) at exit1+0x5c4 sys/kern/kern_exit.c:228 sys_exit(ffff80003c9447f0,ffff80002a801980,ffff80002a8018d0) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80002a801980) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80002a801980) at syscall+0x962 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x76cfba968b70, count: -9