uvm_fault(0xffffffff83aa1d70, 0xffff800024e12008, 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 * 23950 91871 0 0x2 0x1 0 syz-executor ffs2_balloc(fffffd806ea39a00,36398,48,fffffd8007ffd680,1,ffff80002a7ef8d8) at ffs2_balloc+0xa0a sys/ufs/ffs/ffs_balloc.c:614 ffs_write(ffff80002a7ef960) at ffs_write+0x4f9 sys/ufs/ffs/ffs_vnops.c:345 VOP_WRITE(fffffd806c4bc6f8,ffff80002a7efa10,3,fffffd8007ffd680) at VOP_WRITE+0x101 sys/kern/vfs_vops.c:245 ktrwriteraw(ffff80002a767768,fffffd806c4bc6f8,fffffd8007ffd680,ffff80002a7efae0,ffff80002a7efac0) at ktrwriteraw+0x19b sys/kern/kern_ktrace.c:692 ktrsysret(ffff80002a767768,88,16,ffff80002a7efba0) at ktrsysret+0x17f ktrwrite2 sys/kern/kern_ktrace.c:-1 [inline] ktrsysret(ffff80002a767768,88,16,ffff80002a7efba0) at ktrsysret+0x17f sys/kern/kern_ktrace.c:209 syscall(ffff80002a7efc50) at syscall+0xad9 mi_syscall_return sys/sys/syscall_mi.h:204 [inline] syscall(ffff80002a7efc50) at syscall+0xad9 sys/arch/amd64/amd64/trap.c:804 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x72e29ca0b050, 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(0xffffffff83aa1d70, 0xffff800024e12008, 0, 1) -> d ddb> trace ffs2_balloc(fffffd806ea39a00,36398,48,fffffd8007ffd680,1,ffff80002a7ef8d8) at ffs2_balloc+0xa0a sys/ufs/ffs/ffs_balloc.c:614 ffs_write(ffff80002a7ef960) at ffs_write+0x4f9 sys/ufs/ffs/ffs_vnops.c:345 VOP_WRITE(fffffd806c4bc6f8,ffff80002a7efa10,3,fffffd8007ffd680) at VOP_WRITE+0x101 sys/kern/vfs_vops.c:245 ktrwriteraw(ffff80002a767768,fffffd806c4bc6f8,fffffd8007ffd680,ffff80002a7efae0,ffff80002a7efac0) at ktrwriteraw+0x19b sys/kern/kern_ktrace.c:692 ktrsysret(ffff80002a767768,88,16,ffff80002a7efba0) at ktrsysret+0x17f ktrwrite2 sys/kern/kern_ktrace.c:-1 [inline] ktrsysret(ffff80002a767768,88,16,ffff80002a7efba0) at ktrsysret+0x17f sys/kern/kern_ktrace.c:209 syscall(ffff80002a7efc50) at syscall+0xad9 mi_syscall_return sys/sys/syscall_mi.h:204 [inline] syscall(ffff80002a7efc50) at syscall+0xad9 sys/arch/amd64/amd64/trap.c:804 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x72e29ca0b050, count: -7 ddb> show registers rdi 0 rsi 0 rbp 0xffff80002a7ef880 rbx 0xfffffd806ea39a00 rdx 0 rcx 0xffff800024e12000 rax 0x1 r8 0xffffffffffffffff r9 0xffff80002a7ef8d8 r10 0xd1a4c3b55f9862e7 r11 0x14bb84ce6cce0515 r12 0x1 r13 0xffff800000c47800 r14 0xffff80002a7ef720 r15 0xfffffd806a74fe78 rip 0xffffffff830a340a ffs2_balloc+0xa0a cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff80002a7ef710 ss 0x10 ffs2_balloc+0xa0a: movq 0(%rcx,%rax,8),%r14 ddb> show proc PROC (syz-executor) tid=23950 pid=91871 tcnt=1 stat=onproc flags process=2 proc=1 runpri=17, usrpri=50, slppri=17, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80002a7662a8,0xffff80002a767ca8 process=0xffff80002a79cd90 user=0xffff80002a7ea000, vmspace=0xfffffd807ec6ecf0 estcpu=36, cpticks=3, pctcpu=0.0, user=0, sys=3, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 6446 103924 16311 0 2 0 syz-executor 6446 474760 16311 0 2 0x4000000 syz-executor 85056 387264 58434 0 2 0 syz-executor 85056 485584 58434 0 2 0x4000000 syz-executor 85056 344793 58434 0 2 0x4000000 syz-executor 41874 390260 86370 -1 3 0x90 nanoslp syz-executor 41874 182395 86370 -1 3 0x4000090 kqpoll syz-executor 41874 21926 86370 -1 3 0x4000090 fsleep syz-executor 9409 240191 17839 60929 2 0x10 syz-executor 9409 476327 17839 60929 3 0x4000090 kqread syz-executor 9409 116999 17839 60929 3 0x4000090 fsleep syz-executor 87603 53619 62826 0 3 0x3000 suspend syz-executor 87603 234081 62826 0 2 0x4081000 syz-executor 87603 149581 62826 0 3 0x4081000 inode syz-executor 87603 235013 62826 0 3 0x4081000 inode syz-executor 32950 409067 0 0 3 0x14280 nfsidl nfsio 76604 151113 0 0 3 0x14280 nfsidl nfsio 69145 245255 0 0 3 0x14280 nfsidl nfsio 57021 372137 0 0 3 0x14280 nfsidl nfsio 4190 438496 0 0 3 0x14280 nfsidl nfsio 41330 433607 0 0 3 0x14280 nfsidl nfsio 68503 358964 0 0 3 0x14280 nfsidl nfsio 23694 68921 0 0 3 0x14280 nfsidl nfsio 34407 480023 0 0 3 0x14280 nfsidl nfsio 10042 461644 0 0 3 0x14280 nfsidl nfsio 61018 239803 0 0 3 0x14280 nfsidl nfsio 38681 96016 0 0 3 0x14280 nfsidl nfsio 59886 418411 0 0 3 0x14280 nfsidl nfsio 37365 76964 0 0 3 0x14280 nfsidl nfsio 42710 374330 0 0 3 0x14280 nfsidl nfsio 13181 508203 0 0 3 0x14280 nfsidl nfsio 3096 83330 0 0 3 0x14280 nfsidl nfsio 35292 301864 0 0 3 0x14280 nfsidl nfsio 79533 37407 0 0 3 0x14280 nfsidl nfsio 43044 363441 0 0 3 0x14280 nfsidl nfsio 17839 454723 78096 0 3 0x82 nanoslp syz-executor 58434 229555 78096 0 2 0xc82 syz-executor 62826 48225 78096 0 3 0x82 wait syz-executor 46639 24681 78096 0 2 0xc82 syz-executor 16311 41245 78096 0 2 0xc82 syz-executor 42688 287722 78096 0 3 0x2 biowait syz-executor *91871 23950 78096 0 7 0x3 syz-executor 86370 49344 78096 0 3 0x82 nanoslp syz-executor 78096 456204 38691 0 3 0x82 kqread syz-executor 38691 245399 75845 0 3 0x10008a sigsusp ksh 75845 276080 92867 0 3 0x98 kqread sshd-session 92867 129448 13760 0 3 0x92 kqread sshd-session 14405 508510 1 0 3 0x100083 ttyin getty 13760 276587 1 0 3 0x88 kqread sshd 56547 175264 64049 73 3 0x1100090 kqread syslogd 64049 68432 1 0 3 0x100082 sbwait syslogd 26899 115481 1 0 3 0x100080 kqread resolvd 81459 274193 19017 77 3 0x100092 kqread dhcpleased 79822 49974 19017 77 3 0x100092 kqread dhcpleased 19017 458399 1 0 3 0x80 kqread dhcpleased 30425 490747 0 0 3 0x14200 bored smr 85218 112451 0 0 2 0x14200 zerothread 77430 437247 0 0 3 0x14200 aiodoned aiodoned 24900 210991 0 0 3 0x14200 syncer update 94214 193077 0 0 3 0x14200 cleaner cleaner 88628 156093 0 0 3 0x14200 reaper reaper 86565 249448 0 0 3 0x14200 pgdaemon pagedaemon 21167 329397 0 0 3 0x14200 bored viomb 71400 424886 0 0 3 0x40014200 acpi0 acpi0 77028 428956 0 0 3 0x14200 bored softnet0 46183 201363 0 0 3 0x14200 smrbar systqmp 36189 24456 0 0 3 0x14200 bored systq 99234 277705 0 0 3 0x40014200 tmoslp softclock 61352 435689 0 0 3 0x40014200 idle0 1 295625 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 11043 12178K 12430K 166960K 12484 0 pcb 17 14K 16K 166960K 177 0 rtable 231 8K 11K 166960K 436 0 pf 34 13K 20K 166960K 95 0 ifaddr 39 6K 7K 166960K 54 0 ifgroup 50 2K 2K 166960K 70 0 sysctl 3 1K 9K 166960K 10 0 counters 33 17K 18K 166960K 40 0 ioctlops 0 0K 4K 166960K 128 0 iov 0 0K 16K 166960K 57 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1352 85K 85K 166960K 1816 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 4 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 1K 166960K 60 0 dirhash 12 2K 2K 166960K 18 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 16 57K 232K 166960K 444 0 sigio 0 0K 0K 166960K 75 0 proc 60 59K 83K 166960K 525 0 subproc 72 4K 4K 166960K 72 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 33 0 in_multi 84 6K 7K 166960K 113 0 ether_multi 1 0K 0K 166960K 2 0 mrt 0 0K 0K 166960K 11 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 384 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 220 143K 159K 166960K 5423 0 UVM aobj 8 2K 2K 166960K 8 0 pinsyscall 37 74K 94K 166960K 1521 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 8 0 NDP 11 0K 2K 166960K 34 0 temp 44 9107K 9187K 166960K 17052 0 kqueue 14 20K 28K 166960K 80 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 96 0 93 2 1 1 2 0 8 0 rtentry 136 123 0 24 4 0 4 4 0 8 0 unpcb 144 394 0 379 4 0 4 4 0 8 3 syncache 336 5 0 5 2 1 1 1 0 8 1 tcpcb 736 134 0 130 7 0 7 7 0 8 6 arp 96 19 0 2 1 0 1 1 0 8 0 ipq 40 3 0 0 1 0 1 1 0 8 0 ipqe 40 3 0 0 1 0 1 1 0 8 0 inpcb 328 552 0 544 13 6 7 7 0 8 6 nd6 112 27 0 7 1 0 1 1 0 8 0 pkpcb 40 3 0 3 1 0 1 1 0 8 1 kcovpl 48 8 0 0 1 0 1 1 0 8 0 ppxss 1072 4 0 4 1 0 1 1 0 8 1 pfstscr 40 10 0 8 1 0 1 1 0 8 0 pfrktable 1344 7 0 7 1 0 1 1 0 8 1 pfanchor 1288 8 0 4 1 0 1 1 0 8 0 pftag 88 2 0 2 1 0 1 1 0 8 1 pfstitem 24 3 0 0 1 0 1 1 0 8 0 pfstkey 128 11 0 8 1 0 1 1 0 8 0 pfstate 384 6 0 4 1 0 1 1 0 8 0 pfrule 1360 1 0 1 1 0 1 1 0 8 1 rttmr 136 1 0 1 1 0 1 1 0 8 1 art_heap8 4096 2 0 0 2 0 2 2 0 8 0 art_heap4 256 492 0 94 30 0 30 30 0 8 3 art_table 40 494 0 94 5 0 5 5 0 8 0 art_node 32 122 0 28 1 0 1 1 0 8 0 sysvmsgpl 40 1 0 0 1 0 1 1 0 8 0 semupl 112 2 0 2 1 0 1 1 0 8 1 semapl 64 57 0 47 1 0 1 1 0 8 0 shmpl 112 5 0 0 1 0 1 1 0 8 0 dirhash 1024 21 0 4 3 0 3 3 0 8 0 dino2pl 256 2244 0 786 92 0 92 92 0 8 0 ffsino 256 2244 0 786 92 0 92 92 0 8 0 nchpl 144 2896 0 1201 64 0 64 64 0 8 0 rtmask 32 1 0 1 1 0 1 1 0 8 1 vnodes 216 2554 0 0 142 0 142 142 0 8 0 namei 1024 9231 0 9228 3 2 1 2 0 8 0 pfiaddrpl 120 3 0 3 1 0 1 1 0 8 1 kstatmem 264 35 0 12 3 0 3 3 0 8 1 scxspl 216 10947 0 10946 11 3 8 8 1 8 7 plimitpl 152 75 0 58 1 0 1 1 0 8 0 sigapl 424 743 0 682 9 1 8 8 0 8 0 knotepl 120 15396 0 15349 17 7 10 17 0 8 8 kqueuepl 184 104 0 92 1 0 1 1 0 8 0 pipepl 304 145 0 118 3 0 3 3 0 8 0 fdescpl 448 710 0 682 5 1 4 5 0 8 0 filepl 120 4167 0 3952 12 1 11 11 0 8 3 lockfpl 104 330 0 328 2 0 2 2 0 8 1 lockfspl 48 94 0 92 1 0 1 1 0 8 0 sessionpl 144 62 0 54 1 0 1 1 0 8 0 pgrppl 48 74 0 58 1 0 1 1 0 8 0 ucredpl 104 773 0 760 1 0 1 1 0 8 0 zombiepl 144 684 0 682 1 0 1 1 0 8 0 processpl 1152 743 0 682 5 0 5 5 0 8 0 procpl 664 1189 0 1118 7 0 7 7 0 8 0 sosppl 176 2 0 2 1 0 1 1 0 8 1 sockpl 552 1057 0 1031 12 4 8 8 0 8 5 mcl64k 65536 14 0 13 1 0 1 1 0 8 0 mcl12k 12288 1 0 1 1 0 1 1 0 8 1 mcl8k 8192 42 0 42 2 1 1 1 0 8 1 mcl4k 4096 2925 0 2873 14 6 8 14 0 8 1 mcl2k 2048 375 0 372 3 0 3 3 0 8 2 mtagpl 96 9 0 6 1 0 1 1 0 8 0 mbufpl 256 8228 0 8077 44 23 21 31 0 8 8 bufpl 280 8773 0 2557 445 0 445 445 0 8 0 anonpl 24 128142 0 121463 86 10 76 76 0 186 24 amapchunkpl 152 17612 0 17137 36 2 34 34 0 158 13 amappl16 200 2641 0 2392 32 6 26 27 0 8 8 amappl15 192 9 0 9 1 1 0 1 0 8 0 amappl14 184 407 0 406 1 0 1 1 0 8 0 amappl13 176 112 0 102 1 0 1 1 0 8 0 amappl12 168 950 0 923 2 0 2 2 0 8 0 amappl11 160 16 0 16 1 1 0 1 0 8 0 amappl10 152 58 0 47 1 0 1 1 0 8 0 amappl9 144 362 0 362 1 1 0 1 0 8 0 amappl8 136 91 0 90 1 0 1 1 0 8 0 amappl7 128 139 0 128 1 0 1 1 0 8 0 amappl6 120 202 0 200 1 0 1 1 0 8 0 amappl5 112 101 0 93 1 0 1 1 0 8 0 amappl4 104 258 0 241 1 0 1 1 0 8 0 amappl3 96 3352 0 3242 4 0 4 4 0 8 0 amappl2 88 520 0 465 2 0 2 2 0 8 0 amappl1 80 11429 0 10887 13 1 12 13 0 8 0 amappl 88 4676 0 4518 4 0 4 4 0 92 0 uvmvnodes 80 112 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 7 0 0 1 0 1 1 0 8 0 uaddrrnd 24 710 0 682 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 710 0 682 1 0 1 1 0 8 0 vmmpekpl 168 7398 0 7365 2 0 2 2 0 8 0 vmmpepl 168 54312 0 52343 101 0 101 101 0 357 5 vmsppl 368 709 0 682 4 1 3 4 0 8 0 rwobjpl 40 17877 0 16684 16 1 15 15 0 8 1 pdppl 4096 1426 0 1364 98 32 66 80 0 8 4 pvpl 32 336623 0 322584 176 14 162 162 0 265 32 pmappl 216 709 0 682 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 406 0 69 11 0 11 11 0 8 0 ddb> machine ddbcpu 0 No such command ddb> trace ffs2_balloc(fffffd806ea39a00,36398,48,fffffd8007ffd680,1,ffff80002a7ef8d8) at ffs2_balloc+0xa0a sys/ufs/ffs/ffs_balloc.c:614 ffs_write(ffff80002a7ef960) at ffs_write+0x4f9 sys/ufs/ffs/ffs_vnops.c:345 VOP_WRITE(fffffd806c4bc6f8,ffff80002a7efa10,3,fffffd8007ffd680) at VOP_WRITE+0x101 sys/kern/vfs_vops.c:245 ktrwriteraw(ffff80002a767768,fffffd806c4bc6f8,fffffd8007ffd680,ffff80002a7efae0,ffff80002a7efac0) at ktrwriteraw+0x19b sys/kern/kern_ktrace.c:692 ktrsysret(ffff80002a767768,88,16,ffff80002a7efba0) at ktrsysret+0x17f ktrwrite2 sys/kern/kern_ktrace.c:-1 [inline] ktrsysret(ffff80002a767768,88,16,ffff80002a7efba0) at ktrsysret+0x17f sys/kern/kern_ktrace.c:209 syscall(ffff80002a7efc50) at syscall+0xad9 mi_syscall_return sys/sys/syscall_mi.h:204 [inline] syscall(ffff80002a7efc50) at syscall+0xad9 sys/arch/amd64/amd64/trap.c:804 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x72e29ca0b050, count: -7 ddb> machine ddbcpu 1 No such command ddb> trace ffs2_balloc(fffffd806ea39a00,36398,48,fffffd8007ffd680,1,ffff80002a7ef8d8) at ffs2_balloc+0xa0a sys/ufs/ffs/ffs_balloc.c:614 ffs_write(ffff80002a7ef960) at ffs_write+0x4f9 sys/ufs/ffs/ffs_vnops.c:345 VOP_WRITE(fffffd806c4bc6f8,ffff80002a7efa10,3,fffffd8007ffd680) at VOP_WRITE+0x101 sys/kern/vfs_vops.c:245 ktrwriteraw(ffff80002a767768,fffffd806c4bc6f8,fffffd8007ffd680,ffff80002a7efae0,ffff80002a7efac0) at ktrwriteraw+0x19b sys/kern/kern_ktrace.c:692 ktrsysret(ffff80002a767768,88,16,ffff80002a7efba0) at ktrsysret+0x17f ktrwrite2 sys/kern/kern_ktrace.c:-1 [inline] ktrsysret(ffff80002a767768,88,16,ffff80002a7efba0) at ktrsysret+0x17f sys/kern/kern_ktrace.c:209 syscall(ffff80002a7efc50) at syscall+0xad9 mi_syscall_return sys/sys/syscall_mi.h:204 [inline] syscall(ffff80002a7efc50) at syscall+0xad9 sys/arch/amd64/amd64/trap.c:804 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x72e29ca0b050, count: -7