uvm_fault(0xffffffff8396c8d0, 0xffff800028b82848, 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(ffff80002ccbb090) at ffs_write+0xb9a sys/ufs/ffs/ffs_vnops.c:401 VOP_WRITE(fffffd806b939dc0,ffff80002ccbb128,23,fffffd8007ffdea0) at VOP_WRITE+0x101 sys/kern/vfs_vops.c:245 vn_rdwr(1,fffffd806b939dc0,ffff80002ccbb260,40,0,1,f534bd59fedc9189,0,1018,0) at vn_rdwr+0x12d sys/kern/vfs_vnops.c:330 acct_process(ffff8000388e5780) at acct_process+0x7a2 sys/kern/kern_acct.c:245 exit1(ffff8000388e5780,0,0,1) at exit1+0x5c4 sys/kern/kern_exit.c:228 sys_exit(ffff8000388e5780,ffff80002ccbb490,ffff80002ccbb3e0) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80002ccbb490) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80002ccbb490) at syscall+0x962 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7990c9c74820, 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(0xffffffff8396c8d0, 0xffff800028b82848, 0, 2) -> d ddb> trace memset() at memset+0x52 ffs_write(ffff80002ccbb090) at ffs_write+0xb9a sys/ufs/ffs/ffs_vnops.c:401 VOP_WRITE(fffffd806b939dc0,ffff80002ccbb128,23,fffffd8007ffdea0) at VOP_WRITE+0x101 sys/kern/vfs_vops.c:245 vn_rdwr(1,fffffd806b939dc0,ffff80002ccbb260,40,0,1,f534bd59fedc9189,0,1018,0) at vn_rdwr+0x12d sys/kern/vfs_vnops.c:330 acct_process(ffff8000388e5780) at acct_process+0x7a2 sys/kern/kern_acct.c:245 exit1(ffff8000388e5780,0,0,1) at exit1+0x5c4 sys/kern/kern_exit.c:228 sys_exit(ffff8000388e5780,ffff80002ccbb490,ffff80002ccbb3e0) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80002ccbb490) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80002ccbb490) at syscall+0x962 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7990c9c74820, count: -9 ddb> show registers rdi 0xffff800028b82848 rsi 0 rbp 0xffff80002ccbafb0 rbx 0x4848 __ALIGN_SIZE+0x3848 rdx 0 rcx 0xf7 rax 0 r8 0x7b8 r9 0xffff80002ccbaf10 r10 0x9456c18f40dcfb6e r11 0xffff800028b82848 r12 0x848 r13 0x1000 __ALIGN_SIZE r14 0xfffffd806b939dc0 r15 0x1 rip 0xffffffff822250f2 memset+0x52 cs 0x8 rflags 0x10202 __ALIGN_SIZE+0xf202 rsp 0xffff80002ccbada8 ss 0x10 memset+0x52: repe stosq %es:(%rdi) ddb> show proc PROC (syz-executor) tid=176731 pid=81475 tcnt=0 stat=onproc flags process=1018 proc=2000 runpri=32, usrpri=72, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0xffff8000388e5780 scnt=-1 ecnt=1 forw=0xffffffffffffffff, list=0xffff8000388e5a18,0xffff8000388e5cc0 process=0xffff8000ffff9f98 user=0xffff80002ccb6000, vmspace=0xfffffd8073fcd740 estcpu=22, cpticks=5, pctcpu=0.3, user=0, sys=1, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 77905 18368 70625 0 2 0 syz-executor 77905 388092 70625 0 2 0x4000000 syz-executor 29676 321409 98117 0 2 0 syz-executor 29676 451435 98117 0 3 0x4000080 fsleep syz-executor 29814 484499 1 0 3 0x82 nanoslp getty 7094 312648 56227 0 3 0x81 nanoslp syz-executor 7094 409063 56227 0 3 0x4000081 kqread syz-executor 7094 259927 56227 0 3 0x4000081 fsleep syz-executor 87784 140525 1214 0 3 0x3000 suspend syz-executor 87784 308355 1214 0 2 0x4081000 syz-executor 64956 107937 18800 0 2 0 syz-executor 64956 499636 18800 0 3 0x4000080 fsleep syz-executor 64956 484630 18800 0 3 0x4000080 fsleep syz-executor 83513 187826 0 0 3 0x14200 acct acct 73725 417730 18860 0 2 0xc82 syz-executor 46110 179178 18860 0 2 0x2 syz-executor 98117 214817 18860 0 2 0xc82 syz-executor 56227 373761 18860 0 2 0xc82 syz-executor 70625 269793 18860 0 3 0x82 nanoslp syz-executor 18800 280546 18860 0 2 0xc82 syz-executor 1214 5325 18860 0 2 0xc82 syz-executor 18860 78091 1 0 3 0x82 wait syz-executor 2390 237860 1 73 3 0x1100090 kqread syslogd 68278 15181 0 0 3 0x14200 bored smr 58540 240607 0 0 2 0x14200 zerothread 51532 252784 0 0 3 0x14200 aiodoned aiodoned 35205 167501 0 0 3 0x14200 syncer update 16612 61717 0 0 3 0x14200 cleaner cleaner 82598 424965 0 0 3 0x14200 reaper reaper 10245 7664 0 0 3 0x14200 pgdaemon pagedaemon 7354 223203 0 0 3 0x14200 bored viomb 48914 258470 0 0 3 0x40014200 acpi0 acpi0 55632 282107 0 0 2 0x14200 softnet0 60178 101304 0 0 3 0x14200 bored systqmp 39763 464710 0 0 3 0x14200 bored systq 36696 196363 0 0 3 0x40014200 tmoslp softclock 7286 461576 0 0 3 0x40014200 idle0 1 114633 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 11045 12250K 12445K 166960K 12692 0 pcb 17 14K 16K 166960K 166 0 rtable 237 8K 9K 166960K 505 0 pf 34 13K 20K 166960K 85 0 ifaddr 42 7K 8K 166960K 61 0 ifgroup 50 2K 2K 166960K 82 0 sysctl 3 1K 9K 166960K 9 0 counters 33 17K 18K 166960K 47 0 ioctlops 0 0K 4K 166960K 98 0 iov 0 0K 20K 166960K 9 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1364 86K 86K 166960K 1822 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 9K 166960K 13 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 17 0 dirhash 15 2K 2K 166960K 24 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 15 53K 228K 166960K 510 0 sigio 0 0K 0K 166960K 8 0 proc 20 25K 100K 166960K 562 0 subproc 72 4K 4K 166960K 73 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 45 0 in_multi 92 6K 7K 166960K 110 0 ether_multi 1 0K 0K 166960K 2 0 mrt 1 0K 0K 166960K 16 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 97 440K 440K 166960K 97 0 exec 0 0K 1K 166960K 436 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 147 87K 165K 166960K 6078 0 UVM aobj 16 2K 2K 166960K 21 0 pinsyscall 20 40K 94K 166960K 1582 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 17 0 NDP 11 0K 2K 166960K 38 0 temp 44 9072K 9136K 166960K 14792 0 kqueue 7 9K 31K 166960K 86 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 66 0 66 1 0 1 1 0 8 1 rtentry 136 121 0 22 4 0 4 4 0 8 0 unpcb 144 184 0 179 2 0 2 2 0 8 1 syncache 336 5 0 5 2 1 1 1 0 8 1 tcpcb 736 197 0 196 10 3 7 7 0 8 6 arp 96 20 0 0 1 0 1 1 0 8 0 ipq 40 5 0 0 1 0 1 1 0 8 0 ipqe 40 5 0 0 1 0 1 1 0 8 0 inpcb 328 615 0 614 10 3 7 7 0 8 6 ip6q 72 2 0 0 1 0 1 1 0 8 0 ip6af 40 4 0 0 1 0 1 1 0 8 0 nd6 112 26 0 4 1 0 1 1 0 8 0 pkpcb 40 8 0 8 2 1 1 1 0 8 1 kcovpl 48 8 0 0 1 0 1 1 0 8 0 mppekey 1024 1 0 1 1 0 1 1 0 8 1 ppxss 1072 10 0 10 2 1 1 1 0 8 1 pppxif 1416 1 0 1 1 0 1 1 0 8 1 pfanchor 1288 1 0 0 1 0 1 1 0 8 0 pftag 88 1 0 0 1 0 1 1 0 8 0 pfqueue 320 1 0 1 1 1 0 1 0 8 0 pfstitem 24 5 0 0 1 0 1 1 0 8 0 pfstkey 128 7 0 3 2 1 1 1 0 8 0 pfstate 384 4 0 1 2 1 1 1 0 8 0 pfrule 1360 7 0 7 2 1 1 1 0 8 1 art_heap8 4096 3 0 0 3 0 3 3 0 8 0 art_heap4 256 507 0 100 32 1 31 32 0 8 3 art_table 40 510 0 100 6 0 6 6 0 8 0 art_node 32 120 0 31 1 0 1 1 0 8 0 sysvmsgpl 40 3 0 3 2 1 1 1 0 8 1 semapl 112 13 0 3 1 0 1 1 0 8 0 shmpl 112 18 0 5 1 0 1 1 0 8 0 dirhash 1024 25 0 6 3 0 3 3 0 8 0 dino2pl 256 2269 0 811 92 0 92 92 0 8 0 ffsino 256 2269 0 811 92 0 92 92 0 8 0 nchpl 144 2969 0 1272 63 0 63 63 0 8 0 rtmask 32 2 0 2 1 0 1 1 0 8 1 vnodes 216 2643 0 0 147 0 147 147 0 8 0 namei 1024 9713 0 9713 3 2 1 2 0 8 1 kstatmem 264 44 0 22 2 0 2 2 0 8 0 scsiplug 72 2 0 2 1 0 1 1 0 8 1 scxspl 216 15239 0 15239 15 7 8 8 1 8 8 plimitpl 152 106 0 91 1 0 1 1 0 8 0 sigapl 424 789 0 756 6 1 5 6 0 8 0 knotepl 120 18332 0 18074 31 17 14 17 0 8 6 kqueuepl 184 127 0 119 1 0 1 1 0 8 0 pipepl 304 150 0 123 3 0 3 3 0 8 0 fdescpl 448 775 0 757 5 1 4 5 0 8 0 filepl 120 4351 0 4162 14 1 13 13 0 8 5 lockfpl 104 194 0 194 1 0 1 1 0 8 1 lockfspl 48 90 0 90 1 0 1 1 0 8 1 sessionpl 144 37 0 33 1 0 1 1 0 8 0 pgrppl 48 49 0 37 1 0 1 1 0 8 0 ucredpl 104 650 0 644 1 0 1 1 0 8 0 zombiepl 144 758 0 756 2 1 1 1 0 8 0 processpl 1152 789 0 756 4 0 4 4 0 8 0 procpl 664 1339 0 1299 7 1 6 6 0 8 1 sockpl 552 885 0 879 10 2 8 8 0 8 6 mcl64k 65536 30 0 28 1 0 1 1 0 8 0 mcl16k 16384 2 0 2 1 1 0 1 0 8 0 mcl12k 12288 2 0 2 1 1 0 1 0 8 0 mcl8k 8192 4 0 4 1 1 0 1 0 8 0 mcl4k 4096 3010 0 2957 13 5 8 13 0 8 1 mcl2k 2048 437 0 434 2 0 2 2 0 8 1 mtagpl 96 77 0 8 2 0 2 2 0 8 0 mbufpl 256 7792 0 7573 18 1 17 17 0 8 0 bufpl 280 7364 0 1150 444 0 444 444 0 8 0 anonpl 24 149958 0 147882 68 20 48 49 0 187 19 amapchunkpl 152 19906 0 19530 36 2 34 34 0 158 16 amappl16 200 3129 0 3099 19 12 7 16 0 8 2 amappl15 192 7 0 7 1 1 0 1 0 8 0 amappl14 184 409 0 409 1 0 1 1 0 8 1 amappl13 176 112 0 110 1 0 1 1 0 8 0 amappl12 168 1015 0 997 2 0 2 2 0 8 0 amappl11 160 9 0 9 1 1 0 1 0 8 0 amappl10 152 62 0 60 1 0 1 1 0 8 0 amappl9 144 260 0 260 1 1 0 1 0 8 0 amappl8 136 117 0 117 1 0 1 1 0 8 1 amappl7 128 148 0 143 1 0 1 1 0 8 0 amappl6 120 152 0 152 1 0 1 1 0 8 1 amappl5 112 169 0 168 1 0 1 1 0 8 0 amappl4 104 253 0 247 1 0 1 1 0 8 0 amappl3 96 3817 0 3736 4 0 4 4 0 8 1 amappl2 88 506 0 488 2 0 2 2 0 8 0 amappl1 80 10434 0 10285 14 2 12 14 0 8 2 amappl 88 5335 0 5209 5 0 5 5 0 92 1 uvmvnodes 80 108 0 0 3 0 3 3 0 8 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 20 0 5 1 0 1 1 0 8 0 uaddrrnd 24 775 0 756 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 775 0 756 1 0 1 1 0 8 0 vmmpekpl 168 7558 0 7520 2 0 2 2 0 8 0 vmmpepl 168 56309 0 55398 93 8 85 93 0 357 37 vmsppl 368 774 0 756 4 1 3 4 0 8 0 rwobjpl 40 18189 0 17684 13 0 13 13 0 8 0 pdppl 4096 1556 0 1512 96 44 52 80 0 8 8 pvpl 32 381032 0 375439 167 34 133 136 0 265 61 pmappl 216 774 0 756 3 0 3 3 0 8 1 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 384 0 64 10 0 10 10 0 8 0 ddb> machine ddbcpu 0 No such command ddb> trace memset() at memset+0x52 ffs_write(ffff80002ccbb090) at ffs_write+0xb9a sys/ufs/ffs/ffs_vnops.c:401 VOP_WRITE(fffffd806b939dc0,ffff80002ccbb128,23,fffffd8007ffdea0) at VOP_WRITE+0x101 sys/kern/vfs_vops.c:245 vn_rdwr(1,fffffd806b939dc0,ffff80002ccbb260,40,0,1,f534bd59fedc9189,0,1018,0) at vn_rdwr+0x12d sys/kern/vfs_vnops.c:330 acct_process(ffff8000388e5780) at acct_process+0x7a2 sys/kern/kern_acct.c:245 exit1(ffff8000388e5780,0,0,1) at exit1+0x5c4 sys/kern/kern_exit.c:228 sys_exit(ffff8000388e5780,ffff80002ccbb490,ffff80002ccbb3e0) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80002ccbb490) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80002ccbb490) at syscall+0x962 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7990c9c74820, count: -9 ddb> machine ddbcpu 1 No such command ddb>