uvm_fault(0xffffffff83a1e8b0, 0xffff800026c52020, 0, 1) -> d kernel: page fault trap, code=0 Stopped at ffs2_balloc+0xa0a: movq 0(%rcx,%rax,8),%r14 TID PID UID PRFLAGS PFLAGS CPU COMMAND *239388 18202 0 0 0x4000001 0 syz-executor ffs2_balloc(fffffd806cab1500,41a1f,48,fffffd8007ffd888,1,ffff80003a8ecde8) at ffs2_balloc+0xa0a sys/ufs/ffs/ffs_balloc.c:614 ffs_write(ffff80003a8ece70) at ffs_write+0x4f9 sys/ufs/ffs/ffs_vnops.c:345 VOP_WRITE(fffffd80646208b0,ffff80003a8ecf20,3,fffffd8007ffd888) at VOP_WRITE+0x101 sys/kern/vfs_vops.c:245 ktrwriteraw(ffff80003c9a47f8,fffffd80646208b0,fffffd8007ffd888,ffff80003a8ecff0,ffff80003a8ecfd0) at ktrwriteraw+0x19b sys/kern/kern_ktrace.c:691 ktrsysret(ffff80003c9a47f8,4,16,ffff80003a8ed0b0) at ktrsysret+0x17f ktrwrite2 sys/kern/kern_ktrace.c:-1 [inline] ktrsysret(ffff80003c9a47f8,4,16,ffff80003a8ed0b0) at ktrsysret+0x17f sys/kern/kern_ktrace.c:209 syscall(ffff80003a8ed160) at syscall+0xad9 mi_syscall_return sys/sys/syscall_mi.h:204 [inline] syscall(ffff80003a8ed160) at syscall+0xad9 sys/arch/amd64/amd64/trap.c:804 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x9f3bf5e8e0, count: 8 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(0xffffffff83a1e8b0, 0xffff800026c52020, 0, 1) -> d ddb> trace ffs2_balloc(fffffd806cab1500,41a1f,48,fffffd8007ffd888,1,ffff80003a8ecde8) at ffs2_balloc+0xa0a sys/ufs/ffs/ffs_balloc.c:614 ffs_write(ffff80003a8ece70) at ffs_write+0x4f9 sys/ufs/ffs/ffs_vnops.c:345 VOP_WRITE(fffffd80646208b0,ffff80003a8ecf20,3,fffffd8007ffd888) at VOP_WRITE+0x101 sys/kern/vfs_vops.c:245 ktrwriteraw(ffff80003c9a47f8,fffffd80646208b0,fffffd8007ffd888,ffff80003a8ecff0,ffff80003a8ecfd0) at ktrwriteraw+0x19b sys/kern/kern_ktrace.c:691 ktrsysret(ffff80003c9a47f8,4,16,ffff80003a8ed0b0) at ktrsysret+0x17f ktrwrite2 sys/kern/kern_ktrace.c:-1 [inline] ktrsysret(ffff80003c9a47f8,4,16,ffff80003a8ed0b0) at ktrsysret+0x17f sys/kern/kern_ktrace.c:209 syscall(ffff80003a8ed160) at syscall+0xad9 mi_syscall_return sys/sys/syscall_mi.h:204 [inline] syscall(ffff80003a8ed160) at syscall+0xad9 sys/arch/amd64/amd64/trap.c:804 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x9f3bf5e8e0, count: -7 ddb> show registers rdi 0 rsi 0 rbp 0xffff80003a8ecd90 rbx 0xfffffd806cab1500 rdx 0xffff8000015dc180 rcx 0xffff800026c52000 rax 0x4 r8 0xffffffffffffffff r9 0xffff80003a8ecde8 r10 0x685ead4b23e7913c r11 0x743cd2f2538de89b r12 0x1 r13 0xffff800000c47800 r14 0xffff80003a8ecc30 r15 0xfffffd80698c0e70 rip 0xffffffff830e3f7a ffs2_balloc+0xa0a cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff80003a8ecc20 ss 0x10 ffs2_balloc+0xa0a: movq 0(%rcx,%rax,8),%r14 ddb> show proc PROC (syz-executor) tid=239388 pid=18202 tcnt=2 stat=onproc flags process=0 proc=4000001 runpri=17, usrpri=74, slppri=17, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80002a788010,0xffff80003c9a4aa0 process=0xffff80003c9656a0 user=0xffff80003a8e8000, vmspace=0xfffffd806cb0d740 estcpu=24, cpticks=9, pctcpu=0.0, user=0, sys=9, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 93128 363812 19307 0 2 0 syz-executor 93128 204434 19307 0 2 0x4000000 syz-executor 33970 36892 26376 0 3 0x80 fsleep syz-executor 33970 235466 26376 0 2 0x4000c80 syz-executor 38185 205096 70640 0 3 0x80 fsleep syz-executor 38185 386225 70640 0 3 0x4000080 rest syz-executor 86986 339744 58028 0 3 0x80 fsleep syz-executor 86986 30867 58028 0 3 0x4000080 kqsel syz-executor 7175 359548 80751 0 3 0x80 fsleep syz-executor 7175 308054 80751 0 3 0x4000080 netcon syz-executor 18202 279625 35588 0 3 0x80 fsleep syz-executor *18202 239388 35588 0 7 0x4000001 syz-executor 40506 99562 77591 0 3 0x80 fsleep syz-executor 40506 43590 77591 0 3 0x4000080 kqread syz-executor 77233 432694 71662 -1 3 0x90 fsleep syz-executor 77233 502823 71662 -1 3 0x4000090 ttyout syz-executor 58028 123654 49550 0 2 0xc82 syz-executor 26376 372039 49550 0 2 0xc82 syz-executor 21082 215780 0 0 3 0x14280 nfsidl nfsio 61488 237754 0 0 3 0x14280 nfsidl nfsio 788 111768 0 0 3 0x14280 nfsidl nfsio 36723 18569 0 0 3 0x14280 nfsidl nfsio 41889 345902 0 0 3 0x14280 nfsidl nfsio 96990 208388 0 0 3 0x14280 nfsidl nfsio 70807 354797 0 0 3 0x14280 nfsidl nfsio 52513 397242 0 0 3 0x14280 nfsidl nfsio 11134 26283 0 0 3 0x14280 nfsidl nfsio 88206 143603 0 0 3 0x14280 nfsidl nfsio 14169 423969 0 0 3 0x14280 nfsidl nfsio 27092 109519 0 0 3 0x14280 nfsidl nfsio 88121 486108 0 0 3 0x14280 nfsidl nfsio 81519 396971 0 0 3 0x14280 nfsidl nfsio 79696 220044 0 0 3 0x14280 nfsidl nfsio 51005 397038 0 0 3 0x14280 nfsidl nfsio 84005 308319 0 0 3 0x14280 nfsidl nfsio 34493 426580 0 0 3 0x14280 nfsidl nfsio 31317 71289 0 0 3 0x14280 nfsidl nfsio 21178 37792 0 0 3 0x14280 nfsidl nfsio 53418 334294 1 0 3 0x100083 ttyopn getty 35588 278289 49550 0 2 0xc82 syz-executor 80751 252488 49550 0 2 0xc82 syz-executor 19307 85635 49550 0 2 0xc82 syz-executor 70640 462263 49550 0 2 0xc82 syz-executor 71662 59962 49550 0 2 0xc82 syz-executor 77591 413086 49550 0 2 0xc82 syz-executor 49550 90078 16020 0 3 0x82 kqread syz-executor 16020 393892 29699 0 3 0x10008a sigsusp ksh 29699 268811 90579 0 3 0x98 kqread sshd-session 90579 96886 78289 0 3 0x92 kqread sshd-session 78289 256478 1 0 3 0x88 kqread sshd 71912 113424 19624 73 3 0x1100090 kqread syslogd 19624 283384 1 0 3 0x100082 sbwait syslogd 33421 55506 1 0 3 0x100080 kqread resolvd 89585 293405 69237 77 3 0x100092 kqread dhcpleased 13672 259660 69237 77 3 0x100092 kqread dhcpleased 69237 506059 1 0 3 0x80 kqread dhcpleased 12532 61807 0 0 3 0x14200 bored smr 60021 114512 0 0 2 0x14200 zerothread 62725 382112 0 0 3 0x14200 aiodoned aiodoned 74059 41543 0 0 3 0x14200 syncer update 88986 319739 0 0 3 0x14200 cleaner cleaner 86108 150004 0 0 3 0x14200 reaper reaper 96542 150628 0 0 3 0x14200 pgdaemon pagedaemon 33599 266460 0 0 3 0x14200 bored viomb 34220 132707 0 0 3 0x40014200 acpi0 acpi0 5544 310364 0 0 2 0x14200 softnet0 63548 59762 0 0 3 0x14200 bored systqmp 77825 12992 0 0 3 0x14200 bored systq 57615 135849 0 0 3 0x40014200 tmoslp softclock 34663 296709 0 0 3 0x40014200 idle0 1 272925 0 0 3 0x82 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 11042 12124K 12508K 166960K 12666 0 pcb 17 13K 17K 166960K 155 0 rtable 253 8K 8K 166960K 466 0 pf 34 13K 19K 166960K 79 0 ifaddr 44 7K 8K 166960K 66 0 ifgroup 54 2K 2K 166960K 86 0 sysctl 2 1K 9K 166960K 6 0 counters 34 17K 18K 166960K 50 0 ioctlops 0 0K 4K 166960K 105 0 iov 0 0K 12K 166960K 11 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1325 83K 84K 166960K 1702 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 10 0 VM map 2 1K 1K 166960K 2 0 sem 12 1K 1K 166960K 22 0 dirhash 12 2K 2K 166960K 18 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 18 65K 85K 166960K 531 0 sigio 0 0K 0K 166960K 2 0 proc 60 59K 83K 166960K 597 0 subproc 72 4K 4K 166960K 90 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 39 0 in_multi 103 7K 7K 166960K 130 0 ether_multi 1 0K 0K 166960K 2 0 mrt 0 0K 0K 166960K 16 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 73 334K 334K 166960K 73 0 exec 0 0K 1K 166960K 436 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 0K 166960K 2 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 217 142K 161K 166960K 6196 0 UVM aobj 18 2K 4K 166960K 19 0 pinsyscall 39 78K 90K 166960K 1688 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 25 0 NDP 12 0K 2K 166960K 43 0 temp 45 9068K 9132K 166960K 24830 0 kqueue 13 20K 28K 166960K 78 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 70 0 66 1 0 1 1 0 8 0 rtentry 136 146 0 33 5 0 5 5 0 8 0 unpcb 144 205 0 188 2 0 2 2 0 8 1 syncache 336 7 0 7 1 0 1 1 0 8 1 tcpcb 736 107 0 101 1 0 1 1 0 8 0 arp 96 24 0 6 1 0 1 1 0 8 0 ipq 40 2 0 0 1 0 1 1 0 8 0 ipqe 40 4 0 0 1 0 1 1 0 8 0 inpcb 328 382 0 373 4 0 4 4 0 8 3 nd6 112 36 0 10 1 0 1 1 0 8 0 pkpcb 40 4 0 4 1 0 1 1 0 8 1 kcovpl 48 10 0 2 1 0 1 1 0 8 0 ppxss 1072 12 0 12 1 0 1 1 0 8 1 pppxif 1416 1 0 1 1 0 1 1 0 8 1 pfstscr 40 2 0 2 1 0 1 1 0 8 1 pfanchor 1288 1 0 0 1 0 1 1 0 8 0 pfstkey 128 2 0 2 1 0 1 1 0 8 1 pfstate 384 1 0 1 1 0 1 1 0 8 1 pfrule 1360 4 0 3 1 0 1 1 0 8 0 art_heap8 4096 2 0 0 2 0 2 2 0 8 0 art_heap4 256 567 0 103 30 0 30 30 0 8 0 art_table 40 569 0 103 5 0 5 5 0 8 0 art_node 32 146 0 44 1 0 1 1 0 8 0 sysvmsgpl 40 3 0 1 1 0 1 1 0 8 0 semapl 112 18 0 8 1 0 1 1 0 8 0 shmpl 112 16 0 1 1 0 1 1 0 8 0 dirhash 1024 21 0 4 3 0 3 3 0 8 0 dino2pl 256 2241 0 776 92 0 92 92 0 8 0 ffsino 256 2241 0 776 92 0 92 92 0 8 0 nchpl 144 2970 0 1264 64 0 64 64 0 8 0 rtmask 32 2 0 2 1 0 1 1 0 8 1 vnodes 216 2536 0 0 141 0 141 141 0 8 0 namei 1024 9064 0 9064 2 0 2 2 0 8 2 kstatmem 264 47 0 22 2 0 2 2 0 8 0 scsiplug 72 3 0 3 1 0 1 1 0 8 1 scxspl 216 16139 0 16139 3 0 3 3 1 8 3 plimitpl 152 108 0 90 1 0 1 1 0 8 0 sigapl 424 844 0 781 8 0 8 8 0 8 0 knotepl 120 18163 0 18116 10 0 10 10 0 8 8 kqueuepl 184 139 0 128 1 0 1 1 0 8 0 pipepl 304 209 0 182 8 0 8 8 0 8 5 fdescpl 448 810 0 780 4 0 4 4 0 8 0 filepl 120 3736 0 3513 11 0 11 11 0 8 3 lockfpl 104 147 0 145 1 0 1 1 0 8 0 lockfspl 48 60 0 58 1 0 1 1 0 8 0 sessionpl 144 32 0 24 1 0 1 1 0 8 0 pgrppl 48 173 0 157 1 0 1 1 0 8 0 ucredpl 104 538 0 526 1 0 1 1 0 8 0 zombiepl 144 781 0 781 1 0 1 1 0 8 1 processpl 1152 844 0 781 5 0 5 5 0 8 0 procpl 664 1386 0 1315 7 0 7 7 0 8 0 sockpl 552 701 0 671 7 0 7 7 0 8 4 mcl64k 65536 102 0 101 1 0 1 1 0 8 0 mcl16k 16384 24 0 24 1 0 1 1 0 8 1 mcl12k 12288 9 0 9 1 0 1 1 0 8 1 mcl9k128 9344 3 0 3 1 0 1 1 0 8 1 mcl8k 8192 13 0 13 1 0 1 1 0 8 1 mcl4k 4096 3076 0 3018 14 0 14 14 0 8 6 mcl2k 2048 432 0 430 4 0 4 4 0 8 3 mtagpl 96 20 0 8 1 0 1 1 0 8 0 mbufpl 256 8345 0 8138 18 0 18 18 0 8 0 bufpl 280 6661 0 447 444 0 444 444 0 8 0 anonpl 24 148380 0 141663 53 0 53 53 0 187 12 amapchunkpl 152 20228 0 19757 34 0 34 34 0 158 15 amappl16 200 2851 0 2606 16 1 15 16 0 8 2 amappl15 192 13 0 13 1 0 1 1 0 8 1 amappl14 184 431 0 430 1 0 1 1 0 8 0 amappl13 176 125 0 114 1 0 1 1 0 8 0 amappl12 168 1058 0 1029 2 0 2 2 0 8 0 amappl11 160 1 0 1 1 0 1 1 0 8 1 amappl10 152 61 0 51 1 0 1 1 0 8 0 amappl9 144 264 0 264 1 0 1 1 0 8 1 amappl8 136 108 0 107 1 0 1 1 0 8 0 amappl7 128 152 0 140 1 0 1 1 0 8 0 amappl6 120 173 0 171 1 0 1 1 0 8 0 amappl5 112 90 0 82 1 0 1 1 0 8 0 amappl4 104 273 0 256 1 0 1 1 0 8 0 amappl3 96 3880 0 3769 4 0 4 4 0 8 0 amappl2 88 539 0 483 2 0 2 2 0 8 0 amappl1 80 11300 0 10742 15 0 15 15 0 8 2 amappl 88 5394 0 5237 5 0 5 5 0 92 0 uvmvnodes 80 110 0 0 3 0 3 3 0 8 0 dma65536 65536 1 0 1 1 0 1 1 0 8 1 dma4096 4096 1 0 1 1 0 1 1 0 8 1 dma1024 1024 1 0 0 1 0 1 1 0 8 0 dma256 256 6 0 6 1 0 1 1 0 8 1 dma128 128 254 0 254 1 0 1 1 0 8 1 dma64 64 6 0 6 1 0 1 1 0 8 1 dma32 32 7 0 7 1 0 1 1 0 8 1 dma16 16 18 0 17 1 0 1 1 0 8 0 aobjpl 72 18 0 1 1 0 1 1 0 8 0 uaddrrnd 24 810 0 780 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 810 0 780 1 0 1 1 0 8 0 vmmpekpl 168 8125 0 8093 2 0 2 2 0 8 0 vmmpepl 168 58691 0 56648 104 0 104 104 0 357 14 vmsppl 368 809 0 780 4 0 4 4 0 8 1 rwobjpl 40 18822 0 17632 15 0 15 15 0 8 1 pdppl 4096 1626 0 1560 98 30 68 76 0 8 2 pvpl 32 371788 0 358961 122 0 122 122 0 265 15 pmappl 216 809 0 780 2 0 2 2 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 373 0 30 10 0 10 10 0 8 0 ddb> machine ddbcpu 0 No such command ddb> trace ffs2_balloc(fffffd806cab1500,41a1f,48,fffffd8007ffd888,1,ffff80003a8ecde8) at ffs2_balloc+0xa0a sys/ufs/ffs/ffs_balloc.c:614 ffs_write(ffff80003a8ece70) at ffs_write+0x4f9 sys/ufs/ffs/ffs_vnops.c:345 VOP_WRITE(fffffd80646208b0,ffff80003a8ecf20,3,fffffd8007ffd888) at VOP_WRITE+0x101 sys/kern/vfs_vops.c:245 ktrwriteraw(ffff80003c9a47f8,fffffd80646208b0,fffffd8007ffd888,ffff80003a8ecff0,ffff80003a8ecfd0) at ktrwriteraw+0x19b sys/kern/kern_ktrace.c:691 ktrsysret(ffff80003c9a47f8,4,16,ffff80003a8ed0b0) at ktrsysret+0x17f ktrwrite2 sys/kern/kern_ktrace.c:-1 [inline] ktrsysret(ffff80003c9a47f8,4,16,ffff80003a8ed0b0) at ktrsysret+0x17f sys/kern/kern_ktrace.c:209 syscall(ffff80003a8ed160) at syscall+0xad9 mi_syscall_return sys/sys/syscall_mi.h:204 [inline] syscall(ffff80003a8ed160) at syscall+0xad9 sys/arch/amd64/amd64/trap.c:804 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x9f3bf5e8e0, count: -7 ddb> machine ddbcpu 1 No such command ddb> trace ffs2_balloc(fffffd806cab1500,41a1f,48,fffffd8007ffd888,1,ffff80003a8ecde8) at ffs2_balloc+0xa0a sys/ufs/ffs/ffs_balloc.c:614 ffs_write(ffff80003a8ece70) at ffs_write+0x4f9 sys/ufs/ffs/ffs_vnops.c:345 VOP_WRITE(fffffd80646208b0,ffff80003a8ecf20,3,fffffd8007ffd888) at VOP_WRITE+0x101 sys/kern/vfs_vops.c:245 ktrwriteraw(ffff80003c9a47f8,fffffd80646208b0,fffffd8007ffd888,ffff80003a8ecff0,ffff80003a8ecfd0) at ktrwriteraw+0x19b sys/kern/kern_ktrace.c:691 ktrsysret(ffff80003c9a47f8,4,16,ffff80003a8ed0b0) at ktrsysret+0x17f ktrwrite2 sys/kern/kern_ktrace.c:-1 [inline] ktrsysret(ffff80003c9a47f8,4,16,ffff80003a8ed0b0) at ktrsysret+0x17f sys/kern/kern_ktrace.c:209 syscall(ffff80003a8ed160) at syscall+0xad9 mi_syscall_return sys/sys/syscall_mi.h:204 [inline] syscall(ffff80003a8ed160) at syscall+0xad9 sys/arch/amd64/amd64/trap.c:804 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x9f3bf5e8e0, count: -7