uvm_fault(0xffffffff83a75178, 0xffff800028e94a80, 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(ffff80002ccb8e00) at ffs_write+0xb9a sys/ufs/ffs/ffs_vnops.c:401 VOP_WRITE(fffffd80672d80e0,ffff80002ccb8e98,23,fffffd8007ffd750) at VOP_WRITE+0x101 sys/kern/vfs_vops.c:245 vn_rdwr(1,fffffd80672d80e0,ffff80002ccb8fd0,40,0,1,2c1dd76ebf759ce8,0,1008,40) at vn_rdwr+0x12d sys/kern/vfs_vnops.c:324 acct_process(ffff80002f0c0018) at acct_process+0x7a2 sys/kern/kern_acct.c:245 exit1(ffff80002f0c0018,b,0,1) at exit1+0x5c4 sys/kern/kern_exit.c:228 sys_exit(ffff80002f0c0018,ffff80002ccb9200,ffff80002ccb9150) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80002ccb9200) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80002ccb9200) at syscall+0x962 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7485e539dcf0, 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(0xffffffff83a75178, 0xffff800028e94a80, 0, 2) -> d ddb> trace memset() at memset+0x52 ffs_write(ffff80002ccb8e00) at ffs_write+0xb9a sys/ufs/ffs/ffs_vnops.c:401 VOP_WRITE(fffffd80672d80e0,ffff80002ccb8e98,23,fffffd8007ffd750) at VOP_WRITE+0x101 sys/kern/vfs_vops.c:245 vn_rdwr(1,fffffd80672d80e0,ffff80002ccb8fd0,40,0,1,2c1dd76ebf759ce8,0,1008,40) at vn_rdwr+0x12d sys/kern/vfs_vnops.c:324 acct_process(ffff80002f0c0018) at acct_process+0x7a2 sys/kern/kern_acct.c:245 exit1(ffff80002f0c0018,b,0,1) at exit1+0x5c4 sys/kern/kern_exit.c:228 sys_exit(ffff80002f0c0018,ffff80002ccb9200,ffff80002ccb9150) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80002ccb9200) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80002ccb9200) at syscall+0x962 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7485e539dcf0, count: -9 ddb> show registers rdi 0xffff800028e94a80 rsi 0 rbp 0xffff80002ccb8d20 rbx 0x2a80 __ALIGN_SIZE+0x1a80 rdx 0 rcx 0xb0 rax 0 r8 0x580 r9 0xffff80002ccb8c80 r10 0xaadb7c0b8dcc38eb r11 0xffff800028e94a80 r12 0x2a80 __ALIGN_SIZE+0x1a80 r13 0x3000 __ALIGN_SIZE+0x2000 r14 0xfffffd80672d80e0 r15 0x1 rip 0xffffffff8333c672 memset+0x52 cs 0x8 rflags 0x10202 __ALIGN_SIZE+0xf202 rsp 0xffff80002ccb8b18 ss 0x10 memset+0x52: repe stosq %es:(%rdi) ddb> show proc PROC (syz-executor) tid=336177 pid=6312 tcnt=0 stat=onproc flags process=1008 proc=2000 runpri=32, usrpri=61, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0xffff80002f0c0018 scnt=-1 ecnt=1 forw=0xffffffffffffffff, list=0xffff80002f0c0a78,0xffff80003c93efc8 process=0xffff8000ffffba98 user=0xffff80002ccb4000, vmspace=0xfffffd806bdb8a28 estcpu=11, cpticks=3, pctcpu=0.0, user=0, sys=0, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 13307 325754 46737 0 2 0 syz-executor 13307 477317 46737 0 2 0x4000000 syz-executor 11258 515267 9255 0 3 0x80 nanoslp syz-executor 11258 379407 9255 0 3 0x4000080 sbwait syz-executor 30219 141393 18287 0 2 0xc80 syz-executor 30219 97484 18287 0 3 0x4000080 kqread syz-executor 30219 422165 18287 0 3 0x4000080 fsleep syz-executor 79755 472762 10905 0 3 0x80 nanoslp syz-executor 79755 217485 10905 0 3 0x4000080 netacc syz-executor 79755 133592 10905 0 3 0x4000080 fsleep syz-executor 5012 9261 16653 0 3 0x80 nanoslp syz-executor 5012 471607 16653 0 3 0x4000080 sbwait syz-executor 5012 308689 16653 0 3 0x4000080 fsleep syz-executor 12075 279505 1159 0 2 0xc80 syz-executor 12075 126594 1159 0 3 0x4000080 kqsel syz-executor 12075 390969 1159 0 3 0x4000080 fsleep syz-executor 26505 235617 0 0 3 0x14200 acct acct 46737 483294 93077 0 3 0x82 nanoslp syz-executor 28653 409405 1 0 3 0x100083 ttyopn getty 10905 391554 93077 0 2 0xc82 syz-executor 65275 467112 93077 0 3 0x82 wait syz-executor 16653 173362 93077 0 3 0x82 nanoslp syz-executor 35925 393643 93077 0 2 0xc82 syz-executor 18287 352482 93077 0 2 0xc82 syz-executor 1159 421546 93077 0 3 0x82 nanoslp syz-executor 9255 435386 93077 0 3 0x82 nanoslp syz-executor 93077 29038 47713 0 3 0x82 kqread syz-executor 47713 285726 53555 0 3 0x10008a sigsusp ksh 53555 45567 10634 0 3 0x98 kqread sshd-session 10634 124419 86522 0 3 0x92 kqread sshd-session 86522 84708 1 0 3 0x88 kqread sshd 89472 346226 43989 73 3 0x1100090 kqread syslogd 43989 512185 1 0 3 0x100082 sbwait syslogd 42253 221883 1 0 3 0x100080 kqread resolvd 17262 483732 78580 77 3 0x100092 kqread dhcpleased 55620 373556 78580 77 3 0x100092 kqread dhcpleased 78580 401834 1 0 3 0x80 kqread dhcpleased 5517 56992 0 0 3 0x14200 bored smr 52291 303753 0 0 2 0x14200 zerothread 49748 455439 0 0 3 0x14200 aiodoned aiodoned 41873 353735 0 0 3 0x14200 syncer update 3948 79004 0 0 3 0x14200 cleaner cleaner 54097 461512 0 0 3 0x14200 reaper reaper 30245 469584 0 0 3 0x14200 pgdaemon pagedaemon 52245 453310 0 0 3 0x14200 bored viomb 41741 425891 0 0 3 0x40014200 acpi0 acpi0 76429 16398 0 0 3 0x14200 bored softnet0 80246 102053 0 0 3 0x14200 smrbar systqmp 73348 691 0 0 3 0x14200 bored systq 36410 173048 0 0 3 0x40014200 tmoslp softclock 11831 425345 0 0 3 0x40014200 idle0 1 309660 0 0 3 0x82 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 11048 12107K 12435K 166960K 12894 0 pcb 17 16K 21K 166960K 268 0 rtable 221 7K 8K 166960K 491 0 pf 36 14K 21K 166960K 96 0 ifaddr 41 7K 7K 166960K 68 0 ifgroup 54 2K 2K 166960K 103 0 sysctl 3 1K 9K 166960K 8 0 counters 34 17K 18K 166960K 50 0 ioctlops 0 0K 4K 166960K 185 0 iov 0 0K 12K 166960K 22 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1294 81K 82K 166960K 1778 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 7 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 54 0 dirhash 12 2K 2K 166960K 21 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 17 61K 97K 166960K 616 0 sigio 0 0K 0K 166960K 9 0 proc 65 67K 124K 166960K 581 0 subproc 72 4K 4K 166960K 81 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 55 0 in_multi 91 6K 7K 166960K 139 0 ether_multi 1 0K 0K 166960K 10 0 mrt 0 0K 0K 166960K 26 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 91 413K 413K 166960K 91 0 exec 0 0K 1K 166960K 483 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 236 155K 181K 166960K 7221 0 UVM aobj 11 4K 4K 166960K 11 0 pinsyscall 39 78K 100K 166960K 1757 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 22 0 NDP 12 0K 2K 166960K 43 0 temp 48 9070K 9134K 166960K 24481 0 kqueue 15 24K 30K 166960K 109 0 SYN cache 2 16K 24K 166960K 3 0 ddb> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle rtpcb 120 75 0 72 1 0 1 1 0 8 0 rtentry 136 149 0 55 5 0 5 5 0 8 0 unpcb 144 454 0 431 6 0 6 6 0 8 5 syncache 336 8 0 8 2 1 1 1 0 8 1 tcpcb 736 214 0 208 7 0 7 7 0 8 6 arp 96 23 0 7 1 0 1 1 0 8 0 ipq 40 4 0 0 1 0 1 1 0 8 0 ipqe 40 4 0 0 1 0 1 1 0 8 0 inpcb 328 612 0 602 9 0 9 9 0 8 7 ip6q 72 1 0 0 1 0 1 1 0 8 0 ip6af 40 1 0 0 1 0 1 1 0 8 0 nd6 112 33 0 10 1 0 1 1 0 8 0 pkpcb 40 1 0 1 1 0 1 1 0 8 1 kcovpl 48 9 0 1 1 0 1 1 0 8 0 ppxss 1072 7 0 7 2 1 1 1 0 8 1 pppxif 1416 3 0 3 1 0 1 1 0 8 1 pfstscr 40 1 0 0 1 0 1 1 0 8 0 pfrktable 1344 1 0 0 1 0 1 1 0 8 0 pfanchor 1288 2 0 0 1 0 1 1 0 8 0 pftag 88 4 0 0 1 0 1 1 0 8 0 pfqueue 320 1 0 1 1 1 0 1 0 8 0 pfstitem 24 4 0 0 1 0 1 1 0 8 0 pfstkey 128 6 0 2 1 0 1 1 0 8 0 pfstate 384 3 0 1 1 0 1 1 0 8 0 pfrule 1360 5 0 4 2 1 1 1 0 8 0 rttmr 136 4 0 4 2 1 1 1 0 8 1 art_heap8 4096 2 0 0 2 0 2 2 0 8 0 art_heap4 256 621 0 199 32 0 32 32 0 8 4 art_table 40 623 0 199 6 0 6 6 0 8 0 art_node 32 148 0 64 1 0 1 1 0 8 0 sysvmsgpl 40 11 0 6 1 0 1 1 0 8 0 semapl 112 52 0 42 1 0 1 1 0 8 0 shmpl 112 8 0 0 1 0 1 1 0 8 0 dirhash 1024 23 0 6 3 0 3 3 0 8 0 dino2pl 256 2450 0 994 92 0 92 92 0 8 0 ffsino 256 2450 0 994 92 0 92 92 0 8 0 nchpl 144 3315 0 1617 64 0 64 64 0 8 0 vnodes 216 2767 0 0 154 0 154 154 0 8 0 namei 1024 10828 0 10828 3 2 1 2 0 8 1 kstatmem 264 50 0 26 2 0 2 2 0 8 0 scsiplug 72 1 0 1 1 0 1 1 0 8 1 scxspl 216 22877 0 22877 15 7 8 8 1 8 8 plimitpl 152 201 0 184 1 0 1 1 0 8 0 sigapl 424 912 0 868 7 1 6 6 0 8 1 knotepl 120 20942 0 20680 23 13 10 16 0 8 2 kqueuepl 184 150 0 139 1 0 1 1 0 8 0 pipepl 304 151 0 124 3 0 3 3 0 8 0 fdescpl 448 898 0 869 5 1 4 5 0 8 0 filepl 120 4681 0 4460 11 0 11 11 0 8 3 lockfpl 104 136 0 134 1 0 1 1 0 8 0 lockfspl 48 67 0 65 1 0 1 1 0 8 0 sessionpl 144 43 0 35 1 0 1 1 0 8 0 pgrppl 48 55 0 39 1 0 1 1 0 8 0 ucredpl 104 651 0 640 1 0 1 1 0 8 0 zombiepl 144 870 0 868 1 0 1 1 0 8 0 processpl 1152 912 0 868 4 0 4 4 0 8 0 procpl 664 1595 0 1541 6 0 6 6 0 8 1 sosppl 176 3 0 3 1 0 1 1 0 8 1 sockpl 552 1185 0 1149 13 0 13 13 0 8 10 mcl64k 65536 37 0 35 2 1 1 1 0 8 0 mcl16k 16384 8 0 8 2 1 1 1 0 8 1 mcl12k 12288 1 0 1 1 1 0 1 0 8 0 mcl9k 9216 5 0 5 1 0 1 1 0 8 1 mcl8k 8192 13 0 13 2 1 1 1 0 8 1 mcl4k 4096 3182 0 3130 16 7 9 14 0 8 2 mcl2k 2048 557 0 553 2 0 2 2 0 8 1 mtagpl 96 15 0 7 1 0 1 1 0 8 0 mbufpl 256 9247 0 9053 18 0 18 18 0 8 4 bufpl 280 10997 0 4783 445 0 445 445 0 8 0 anonpl 24 178830 0 171395 131 45 86 86 0 187 15 amapchunkpl 152 23830 0 23315 53 12 41 41 0 158 17 amappl16 200 3746 0 3473 51 28 23 26 0 8 5 amappl15 192 2 0 2 1 1 0 1 0 8 0 amappl14 184 421 0 420 1 0 1 1 0 8 0 amappl13 176 121 0 111 1 0 1 1 0 8 0 amappl12 168 1144 0 1115 2 0 2 2 0 8 0 amappl11 160 4 0 4 1 1 0 1 0 8 0 amappl10 152 65 0 54 1 0 1 1 0 8 0 amappl9 144 258 0 258 1 1 0 1 0 8 0 amappl8 136 109 0 108 1 0 1 1 0 8 0 amappl7 128 148 0 136 1 0 1 1 0 8 0 amappl6 120 197 0 195 1 0 1 1 0 8 0 amappl5 112 105 0 97 1 0 1 1 0 8 0 amappl4 104 300 0 284 1 0 1 1 0 8 0 amappl3 96 4503 0 4390 4 0 4 4 0 8 0 amappl2 88 550 0 496 2 0 2 2 0 8 0 amappl1 80 12465 0 11910 17 2 15 15 0 8 2 amappl 88 6405 0 6233 5 0 5 5 0 92 0 uvmvnodes 80 112 0 0 3 0 3 3 0 8 0 dma8192 8192 1 0 1 1 0 1 1 0 8 1 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 7 0 7 2 1 1 1 0 8 1 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 19 0 18 1 0 1 1 0 8 0 aobjpl 72 10 0 0 1 0 1 1 0 8 0 uaddrrnd 24 898 0 868 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 898 0 868 1 0 1 1 0 8 0 vmmpekpl 168 8847 0 8809 2 0 2 2 0 8 0 vmmpepl 168 66114 0 64023 129 18 111 111 0 357 9 vmsppl 368 897 0 868 4 1 3 4 0 8 0 rwobjpl 40 21337 0 20118 18 1 17 17 0 8 0 pdppl 4096 1802 0 1736 106 40 66 82 0 8 0 pvpl 32 437902 0 424565 233 60 173 173 0 265 12 pmappl 216 897 0 868 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 397 0 58 10 0 10 10 0 8 0 ddb> machine ddbcpu 0 No such command ddb> trace memset() at memset+0x52 ffs_write(ffff80002ccb8e00) at ffs_write+0xb9a sys/ufs/ffs/ffs_vnops.c:401 VOP_WRITE(fffffd80672d80e0,ffff80002ccb8e98,23,fffffd8007ffd750) at VOP_WRITE+0x101 sys/kern/vfs_vops.c:245 vn_rdwr(1,fffffd80672d80e0,ffff80002ccb8fd0,40,0,1,2c1dd76ebf759ce8,0,1008,40) at vn_rdwr+0x12d sys/kern/vfs_vnops.c:324 acct_process(ffff80002f0c0018) at acct_process+0x7a2 sys/kern/kern_acct.c:245 exit1(ffff80002f0c0018,b,0,1) at exit1+0x5c4 sys/kern/kern_exit.c:228 sys_exit(ffff80002f0c0018,ffff80002ccb9200,ffff80002ccb9150) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80002ccb9200) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80002ccb9200) at syscall+0x962 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7485e539dcf0, count: -9 ddb> machine ddbcpu 1 No such command ddb> trace memset() at memset+0x52 ffs_write(ffff80002ccb8e00) at ffs_write+0xb9a sys/ufs/ffs/ffs_vnops.c:401 VOP_WRITE(fffffd80672d80e0,ffff80002ccb8e98,23,fffffd8007ffd750) at VOP_WRITE+0x101 sys/kern/vfs_vops.c:245 vn_rdwr(1,fffffd80672d80e0,ffff80002ccb8fd0,40,0,1,2c1dd76ebf759ce8,0,1008,40) at vn_rdwr+0x12d sys/kern/vfs_vnops.c:324 acct_process(ffff80002f0c0018) at acct_process+0x7a2 sys/kern/kern_acct.c:245 exit1(ffff80002f0c0018,b,0,1) at exit1+0x5c4 sys/kern/kern_exit.c:228 sys_exit(ffff80002f0c0018,ffff80002ccb9200,ffff80002ccb9150) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80002ccb9200) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80002ccb9200) at syscall+0x962 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7485e539dcf0, count: -9