uvm_fault(0xfffffd80744333f0, 0x18, 0, 1) -> e kernel: page fault trap, code=0 Stopped at ffs_write+0x170: movq 0x18(%rax),%r15 TID PID UID PRFLAGS PFLAGS CPU COMMAND ffs_write(ffff80003c480dd0) at ffs_write+0x170 sys/ufs/ffs/ffs_vnops.c:307 VOP_WRITE(fffffd8061fda6c0,ffff80003c480e68,23,fffffd80097fd000) at VOP_WRITE+0x101 sys/kern/vfs_vops.c:245 vn_rdwr(1,fffffd8061fda6c0,ffff80003c480fa0,40,0,1,8ff0e703785b9fa4,0,1018,0) at vn_rdwr+0x12d sys/kern/vfs_vnops.c:324 acct_process(ffff8000fffef240) at acct_process+0x7a2 sys/kern/kern_acct.c:245 exit1(ffff8000fffef240,0,0,1) at exit1+0x5c4 sys/kern/kern_exit.c:228 sys_exit(ffff8000fffef240,ffff80003c4811e0,ffff80003c481130) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80003c4811e0) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c4811e0) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:765 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7b3fbc9a7540, count: 7 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{0}> ddb{0}> set $lines = 0 ddb{0}> set $maxwidth = 0 ddb{0}> show panic *cpu0: uvm_fault(0xfffffd80744333f0, 0x18, 0, 1) -> e ddb{0}> trace ffs_write(ffff80003c480dd0) at ffs_write+0x170 sys/ufs/ffs/ffs_vnops.c:307 VOP_WRITE(fffffd8061fda6c0,ffff80003c480e68,23,fffffd80097fd000) at VOP_WRITE+0x101 sys/kern/vfs_vops.c:245 vn_rdwr(1,fffffd8061fda6c0,ffff80003c480fa0,40,0,1,8ff0e703785b9fa4,0,1018,0) at vn_rdwr+0x12d sys/kern/vfs_vnops.c:324 acct_process(ffff8000fffef240) at acct_process+0x7a2 sys/kern/kern_acct.c:245 exit1(ffff8000fffef240,0,0,1) at exit1+0x5c4 sys/kern/kern_exit.c:228 sys_exit(ffff8000fffef240,ffff80003c4811e0,ffff80003c481130) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80003c4811e0) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c4811e0) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:765 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7b3fbc9a7540, count: -8 ddb{0}> show registers rdi 0 rsi 0x2 rbp 0xffff80003c480dc0 rbx 0x23 rdx 0 rcx 0xffff8000fffef240 rax 0 r8 0 r9 0x1 r10 0xf506197080393b5b r11 0xc848108b1b54e3d5 r12 0xfffffd806ca9a298 r13 0xffff80003c480e68 r14 0x40 r15 0x1 rip 0xffffffff8210bd60 ffs_write+0x170 cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff80003c480d00 ss 0x10 ffs_write+0x170: movq 0x18(%rax),%r15 ddb{0}> show proc PROC (syz-executor) tid=130943 pid=12461 tcnt=0 stat=onproc flags process=1018 proc=2000 runpri=32, usrpri=83, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0xffff8000fffef240 scnt=-1 ecnt=1 forw=0xffffffffffffffff, list=0xffff8000368014f8,0xffff800037c09258 process=0xffff80003c4689c8 user=0xffff80003c47c000, vmspace=0xfffffd80744333f0 estcpu=33, cpticks=4, pctcpu=0.3, user=0, sys=1, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 23431 439322 64100 0 2 0 syz-executor 23431 326218 64100 0 3 0x4000080 bell syz-executor 55396 466102 43030 60929 2 0x10 syz-executor 55396 507193 43030 60929 3 0x4000090 kqpoll syz-executor 73008 54831 90731 0 2 0 syz-executor 96198 253814 23166 0 3 0x80 nanoslp syz-executor 96198 178433 23166 0 2 0x4000000 syz-executor 96198 143479 23166 0 3 0x4000080 fsleep syz-executor 42992 307892 87237 0 2 0xc82 syz-executor 2012 423507 0 0 3 0x14200 acct acct 43030 440422 87237 0 3 0x82 nanoslp syz-executor 62157 377809 0 0 3 0x14280 nfsidl nfsio 42270 144501 0 0 3 0x14280 nfsidl nfsio 46504 402753 0 0 3 0x14280 nfsidl nfsio 73380 148148 0 0 3 0x14280 nfsidl nfsio 48831 11977 0 0 3 0x14280 nfsidl nfsio 53232 452626 0 0 3 0x14280 nfsidl nfsio 57450 385560 0 0 3 0x14280 nfsidl nfsio 25330 501429 0 0 3 0x14280 nfsidl nfsio 66595 101610 0 0 3 0x14280 nfsidl nfsio 36143 76728 0 0 3 0x14280 nfsidl nfsio 99134 298218 0 0 3 0x14280 nfsidl nfsio 1476 106209 0 0 3 0x14280 nfsidl nfsio 51622 193460 0 0 3 0x14280 nfsidl nfsio 8119 83995 0 0 3 0x14280 nfsidl nfsio 64100 329909 87237 0 3 0x82 nanoslp syz-executor 60604 346436 0 0 3 0x14280 nfsidl nfsio 98038 136195 0 0 3 0x14280 nfsidl nfsio 13284 520012 0 0 3 0x14280 nfsidl nfsio 77028 501353 0 0 3 0x14280 nfsidl nfsio 22955 357135 87237 0 2 0x2 syz-executor 98826 48569 87237 0 2 0xc82 syz-executor 90731 40238 87237 0 2 0xc82 syz-executor 23166 447532 87237 0 2 0xc82 syz-executor 93872 135601 87237 0 2 0xc82 syz-executor 87237 156787 52058 0 3 0x82 kqread syz-executor 52058 523360 25879 0 3 0x10008a sigsusp ksh 25879 89354 15106 0 3 0x98 kqread sshd-session 15106 423275 83097 0 3 0x92 kqread sshd-session 59863 110828 1 0 3 0x100083 ttyopn getty 83097 519050 1 0 3 0x88 kqread sshd 34825 129003 51864 74 3 0x1100092 bpf pflogd 51864 196938 1 0 3 0x80 sbwait pflogd 72993 315732 77082 73 3 0x1100090 kqread syslogd 77082 225471 1 0 3 0x100082 sbwait syslogd 74675 314332 1 0 3 0x100080 kqread resolvd 25122 67608 6360 77 3 0x100092 kqread dhcpleased 28085 325290 6360 77 3 0x100092 kqread dhcpleased 6360 94490 1 0 3 0x80 kqread dhcpleased 77909 184916 0 0 3 0x14200 bored smr 75263 190312 0 0 2 0x14200 zerothread 26670 83525 0 0 3 0x14200 aiodoned aiodoned 21410 180050 0 0 3 0x14200 syncer update 84646 498700 0 0 3 0x14200 cleaner cleaner 53085 71138 0 0 3 0x14200 reaper reaper 98516 204476 0 0 3 0x14200 pgdaemon pagedaemon 73117 129016 0 0 3 0x14200 bored viomb 10637 75051 0 0 3 0x40014200 acpi0 acpi0 69794 480336 0 0 7 0x40014200 idle1 19014 340610 0 0 3 0x14200 bored softnet1 42163 132542 0 0 3 0x14200 bored softnet0 29104 356798 0 0 3 0x14200 bored systqmp 61440 168719 0 0 3 0x14200 bored systq 70507 346511 0 0 3 0x14200 tmoslp softclockmp 21978 311839 0 0 3 0x40014200 tmoslp softclock 19075 249328 0 0 3 0x40014200 idle0 1 420819 0 0 3 0x80082 wait init 0 0 -1 0 3 0x10010200 scheduler swapper ddb{0}> show all locks Process 22955 (syz-executor) thread 0xffff80003c41e030 (357135) ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10245 11044K 12600K 166960K 14005 0 pcb 17 15K 16K 166960K 234 0 rtable 240 12K 12K 166960K 648 0 pf 41 18K 20K 166960K 197 0 ifaddr 43 8K 8K 166960K 140 0 ifgroup 64 2K 3K 166960K 241 0 sysctl 4 1K 9K 166960K 17 0 counters 72 37K 38K 166960K 258 0 ioctlops 0 0K 6K 166960K 1726 0 iov 0 0K 32K 166960K 205 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1466 92K 93K 166960K 2678 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 3 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 41 0 dirhash 12 2K 2K 166960K 30 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 16 57K 240K 166960K 1221 0 sigio 1 0K 0K 166960K 65 0 proc 72 115K 164K 166960K 711 0 subproc 72 4K 4K 166960K 111 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 123 0 in_multi 87 6K 7K 166960K 188 0 ether_multi 1 0K 0K 166960K 8 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 235 1049K 1049K 166960K 235 0 exec 0 0K 1K 166960K 546 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 238 167K 191K 166960K 12996 0 UVM aobj 31 10K 10K 166960K 33 0 pinsyscall 42 84K 106K 166960K 2501 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 67 0 NDP 14 0K 2K 166960K 97 0 temp 72 8671K 8919K 166960K 58379 0 kqueue 13 20K 36K 166960K 269 0 SYN cache 2 16K 16K 166960K 2 0 ddb{0}> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle plcache 128 26 0 0 1 0 1 1 0 8 0 rtpcb 120 124 0 121 1 0 1 1 0 8 0 rtentry 176 194 0 102 6 0 6 6 0 8 0 unpcb 144 499 0 480 2 1 1 2 0 8 0 syncache 336 12 0 12 2 1 1 1 0 8 1 tcpqe 32 4 0 4 2 1 1 1 0 8 1 tcpcb 736 533 0 524 9 5 4 7 0 8 3 arp 136 29 0 14 1 0 1 1 0 8 0 inpcb 328 1486 0 1473 15 7 8 13 0 8 6 nd6 152 40 0 15 1 0 1 1 0 8 0 pkpcb 40 10 0 10 1 1 0 1 0 8 0 kcovpl 48 12 0 4 1 0 1 1 0 8 0 ppxss 1192 71 0 71 1 0 1 1 0 8 1 pppxif 1504 11 0 11 2 1 1 1 0 8 1 pffrag 232 11 0 1 1 0 1 1 0 482 0 pffrnode 88 9 0 0 1 0 1 1 0 8 0 pffrent 40 13 0 3 1 0 1 1 0 8 0 pfosfp 40 1428 0 1005 5 0 5 5 0 8 0 pfosfpen 112 1428 0 714 21 0 21 21 0 8 0 pfrktable 1344 2 0 2 1 1 0 1 0 8 0 pfstitem 24 68 0 22 1 0 1 1 0 8 0 pfstkey 128 68 0 22 2 0 2 2 0 8 0 pfstate 448 66 0 22 6 0 6 6 0 8 0 pfrule 1344 26 0 21 2 1 1 2 0 8 0 rttmr 136 3 0 3 3 2 1 1 0 8 1 art_heap8 4096 5 0 2 5 0 5 5 0 8 2 art_heap4 256 873 0 483 31 6 25 29 0 8 0 art_table 40 878 0 485 5 0 5 5 0 8 0 art_node 32 192 0 111 1 0 1 1 0 8 0 sysvmsgpl 40 14 0 8 1 0 1 1 0 8 0 semupl 112 1 0 1 1 1 0 1 0 8 0 semapl 112 34 0 24 1 0 1 1 0 8 0 shmpl 112 25 0 1 1 0 1 1 0 8 0 dirhash 1024 30 0 13 3 0 3 3 0 8 0 dino2pl 256 3639 0 2119 96 0 96 96 0 8 0 ffsino 296 3639 0 2119 118 0 118 118 0 8 0 ffsino: pool(0xffffffff839c3f10:ffsino): page inconsistency: page 0x0; at page head addr 0xfffffd806ca9af90 (p 0xfffffd806ca9a000) nchpl 144 5214 0 3500 64 0 64 64 0 8 0 rtmask 32 11 0 11 2 1 1 1 0 8 1 vnodes 216 4554 0 0 253 0 253 253 0 8 0 namei 1024 19024 0 19023 2 1 1 2 0 8 0 percpumem 16 144 0 93 1 0 1 1 0 8 0 vcpupl 3968 5 0 1 1 0 1 1 0 8 0 vmpool 840 5 0 1 1 0 1 1 0 8 0 kstatmem 264 152 0 118 3 0 3 3 0 8 0 acpiwqpl 32 1 0 1 1 0 1 1 1 8 1 scsiplug 72 4 0 4 3 3 0 1 0 8 0 scxspl 216 21377 0 21377 9 8 1 8 1 8 1 plimitpl 152 239 0 221 1 0 1 1 0 8 0 sigapl 424 1552 0 1486 8 0 8 8 0 8 0 knotepl 120 343 0 0 11 0 11 11 0 8 0 kqueuepl 224 579 0 568 9 5 4 5 0 8 2 pipepl 344 377 0 350 15 6 9 9 0 8 6 fdescpl 528 1508 0 1478 3 0 3 3 0 8 0 filepl 160 10125 0 9905 21 4 17 18 0 8 5 lockfpl 104 532 0 530 1 0 1 1 0 8 0 lockfspl 48 212 0 210 1 0 1 1 0 8 0 sessionpl 144 33 0 24 1 0 1 1 0 8 0 pgrppl 48 66 0 48 1 0 1 1 0 8 0 ucredpl 104 1522 0 1506 1 0 1 1 0 8 0 zombiepl 144 1489 0 1486 1 0 1 1 0 8 0 processpl 1232 1552 0 1486 6 0 6 6 0 8 0 procpl 664 3236 0 3166 9 1 8 8 0 8 0 sosppl 176 5 0 5 2 2 0 1 0 8 0 sockpl 752 2143 0 2108 20 9 11 18 0 8 6 mcl64k 65536 5 0 0 1 0 1 1 0 8 0 mcl12k 12288 1 0 0 1 0 1 1 0 8 0 mcl9k 9216 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 3 0 0 1 0 1 1 0 8 0 mcl4k 4096 112 0 0 14 0 14 14 0 8 0 mcl2k2 2112 2 0 0 1 0 1 1 0 8 0 mcl2k 2048 32 0 0 4 0 4 4 0 8 0 mtagpl 96 77 0 0 2 0 2 2 0 8 0 mbufpl 256 930 0 0 59 0 59 59 0 8 0 bufpl 280 7345 0 1208 439 0 439 439 0 8 0 anonpl 32 9712 0 0 79 0 79 79 0 246 0 amapchunkpl 152 44027 0 43555 39 4 35 35 0 158 11 amappl16 200 4522 0 4491 30 16 14 15 0 8 8 amappl15 192 5 0 5 2 2 0 1 0 8 0 amappl14 184 5 0 5 2 2 0 1 0 8 0 amappl13 176 484 0 483 1 0 1 1 0 8 0 amappl12 168 1945 0 1904 3 0 3 3 0 8 0 amappl11 160 45 0 45 1 1 0 1 0 8 0 amappl10 152 55 0 41 1 0 1 1 0 8 0 amappl9 144 274 0 274 1 1 0 1 0 8 0 amappl8 136 27 0 25 1 0 1 1 0 8 0 amappl7 128 100 0 99 1 0 1 1 0 8 0 amappl6 120 339 0 326 1 0 1 1 0 8 0 amappl5 112 88 0 77 1 0 1 1 0 8 0 amappl4 104 505 0 477 1 0 1 1 0 8 0 amappl3 96 7309 0 7219 4 1 3 3 0 8 0 amappl2 88 1667 0 1590 2 0 2 2 0 8 0 amappl1 80 15812 0 15220 14 0 14 14 0 8 0 amappl 88 11942 0 11782 5 0 5 5 0 92 0 uvmvnodes 80 141 0 0 3 0 3 3 0 8 0 dma4096 4096 2 0 2 2 2 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 128 255 0 255 3 3 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 32 0 2 1 0 1 1 0 8 0 uaddrrnd 24 1508 0 1477 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1508 0 1477 1 0 1 1 0 8 0 vmmpekpl 168 14428 0 14384 3 0 3 3 0 8 0 vmmpepl 168 102571 0 100667 106 8 98 98 0 357 8 vmsppl 488 1507 0 1477 5 0 5 5 0 8 0 rwobjpl 80 29315 0 28223 28 0 28 28 0 8 0 pdppl 4096 3033 0 2960 112 36 76 87 0 8 3 pvpl 32 18120 0 0 147 1 146 146 0 265 0 pmappl 256 1512 0 1478 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 352 0 52 9 0 9 9 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace ffs_write(ffff80003c480dd0) at ffs_write+0x170 sys/ufs/ffs/ffs_vnops.c:307 VOP_WRITE(fffffd8061fda6c0,ffff80003c480e68,23,fffffd80097fd000) at VOP_WRITE+0x101 sys/kern/vfs_vops.c:245 vn_rdwr(1,fffffd8061fda6c0,ffff80003c480fa0,40,0,1,8ff0e703785b9fa4,0,1018,0) at vn_rdwr+0x12d sys/kern/vfs_vnops.c:324 acct_process(ffff8000fffef240) at acct_process+0x7a2 sys/kern/kern_acct.c:245 exit1(ffff8000fffef240,0,0,1) at exit1+0x5c4 sys/kern/kern_exit.c:228 sys_exit(ffff8000fffef240,ffff80003c4811e0,ffff80003c481130) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80003c4811e0) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c4811e0) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:765 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7b3fbc9a7540, count: -8 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffff8000299edff0) at x86_ipi_db+0x27 sys/arch/amd64/amd64/db_interface.c:394 x86_ipi_handler() at x86_ipi_handler+0xd9 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27 acpicpu_idle() at acpicpu_idle+0x457 sys/dev/acpi/acpicpu_x86.c:1224 sched_idle(ffff8000299edff0) at sched_idle+0x391 sys/kern/kern_sched.c:191 end trace frame: 0x0, count: 10 ddb{1}> trace x86_ipi_db(ffff8000299edff0) at x86_ipi_db+0x27 sys/arch/amd64/amd64/db_interface.c:394 x86_ipi_handler() at x86_ipi_handler+0xd9 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27 acpicpu_idle() at acpicpu_idle+0x457 sys/dev/acpi/acpicpu_x86.c:1224 sched_idle(ffff8000299edff0) at sched_idle+0x391 sys/kern/kern_sched.c:191 end trace frame: 0x0, count: -5