uvm_fault(0xffffffff82df5e78, 0xffff800028812010, 0, 1) -> d kernel: page fault trap, code=0 Stopped at ffs2_balloc+0x78e: movq 0(%rcx,%rax,8),%r14 TID PID UID PRFLAGS PFLAGS CPU COMMAND * 79691 13728 73 0x19100010 0 0 syslogd ffs2_balloc(fffffd806efb4f10,395b0,64,fffffd807f7d7680,1,ffff80002a6596d8) at ffs2_balloc+0x78e sys/ufs/ffs/ffs_balloc.c:614 ffs_write(ffff80002a659760) at ffs_write+0x3c7 sys/ufs/ffs/ffs_vnops.c:345 VOP_WRITE(fffffd807bd65708,ffff80002a659980,3,fffffd807f7d7680) at VOP_WRITE+0xc3 sys/kern/vfs_vops.c:245 vn_write(fffffd807e7740f8,ffff80002a659980,0) at vn_write+0x157 sys/kern/vfs_vnops.c:408 dofilewritev(ffff80002a62dc40,e,ffff80002a659980,0,ffff80002a659a40) at dofilewritev+0x1a9 sys/kern/sys_generic.c:375 sys_writev(ffff80002a62dc40,ffff80002a659af0,ffff80002a659a40) at sys_writev+0xab sys/kern/sys_generic.c:322 syscall(ffff80002a659af0) at syscall+0x72a sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x734e00b60230, 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> ddb> set $lines = 0 ddb> set $maxwidth = 0 ddb> show panic *cpu0: uvm_fault(0xffffffff82df5e78, 0xffff800028812010, 0, 1) -> d ddb> trace ffs2_balloc(fffffd806efb4f10,395b0,64,fffffd807f7d7680,1,ffff80002a6596d8) at ffs2_balloc+0x78e sys/ufs/ffs/ffs_balloc.c:614 ffs_write(ffff80002a659760) at ffs_write+0x3c7 sys/ufs/ffs/ffs_vnops.c:345 VOP_WRITE(fffffd807bd65708,ffff80002a659980,3,fffffd807f7d7680) at VOP_WRITE+0xc3 sys/kern/vfs_vops.c:245 vn_write(fffffd807e7740f8,ffff80002a659980,0) at vn_write+0x157 sys/kern/vfs_vnops.c:408 dofilewritev(ffff80002a62dc40,e,ffff80002a659980,0,ffff80002a659a40) at dofilewritev+0x1a9 sys/kern/sys_generic.c:375 sys_writev(ffff80002a62dc40,ffff80002a659af0,ffff80002a659a40) at sys_writev+0xab sys/kern/sys_generic.c:322 syscall(ffff80002a659af0) at syscall+0x72a sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x734e00b60230, count: -8 ddb> show registers rdi 0 rsi 0 rbp 0xffff80002a659680 rbx 0xfffffd806efb4f10 rdx 0 rcx 0xffff800028812000 rax 0x2 r8 0xffffffffffffffff r9 0xffff80002a6596d8 r10 0x56fd860d1e4e6d7c r11 0xd74b0609aaa07622 r12 0x10 r13 0x1 r14 0xffffffff r15 0xfffffd8072f4d028 rip 0xffffffff81380ace ffs2_balloc+0x78e cs 0x8 rflags 0x10202 __ALIGN_SIZE+0xf202 rsp 0xffff80002a659510 ss 0x10 ffs2_balloc+0x78e: movq 0(%rcx,%rax,8),%r14 ddb> show proc PROC (syslogd) tid=79691 pid=13728 tcnt=1 stat=onproc flags process=19100010 proc=0 runpri=24, usrpri=50, slppri=24, nice=20 wchan=0x0, wmesg=, ps_single=0x0 forw=0xffffffffffffffff, list=0xffff80002a62d9b0,0xffff80002a62ccf0 process=0xffff8000ffff7250 user=0xffff80002a654000, vmspace=0xfffffd807e646818 estcpu=0, cpticks=0, pctcpu=0.0, user=0, sys=0, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 68577 372499 97376 0 2 0x8000000 syz-executor.6 68577 487266 97376 0 2 0xc000000 syz-executor.6 68206 398753 36366 0 2 0x8000000 syz-executor.5 68206 473326 36366 0 2 0xc000000 syz-executor.5 73203 25073 78700 0 2 0x8000000 syz-executor.1 73203 133090 78700 0 2 0xc000000 syz-executor.1 50060 212443 65036 60928 2 0x8000010 syz-executor.0 50060 514901 65036 60928 3 0xc000090 fsleep syz-executor.0 49073 224742 7245 0 2 0x8000000 syz-executor.2 49073 507054 7245 0 2 0xc000000 syz-executor.2 13875 510299 50183 0 2 0x8000000 syz-executor.7 13875 391906 50183 0 3 0xc000080 fsleep syz-executor.7 74748 266037 31424 0 2 0x8000000 syz-executor.3 74748 263801 31424 0 3 0xc000080 fsleep syz-executor.3 50183 52987 72061 0 3 0x8000082 nanoslp syz-executor.7 368 260632 1 0 3 0x18100083 ttyin getty 25829 197842 0 0 3 0x14200 acct acct 7245 346303 72061 0 3 0x8000082 nanoslp syz-executor.2 31424 500109 72061 0 3 0x8000082 nanoslp syz-executor.3 3271 401337 72061 0 2 0x8000002 syz-executor.4 78700 21859 72061 0 3 0x8000082 nanoslp syz-executor.1 65791 315465 0 0 3 0x14280 nfsidl nfsio 89102 6612 0 0 3 0x14280 nfsidl nfsio 33410 458205 0 0 3 0x14280 nfsidl nfsio 63658 430463 0 0 3 0x14280 nfsidl nfsio 6713 263665 0 0 3 0x14280 nfsidl nfsio 77427 38797 0 0 3 0x14280 nfsidl nfsio 46779 342916 0 0 3 0x14280 nfsidl nfsio 81453 447312 0 0 3 0x14280 nfsidl nfsio 19099 305207 0 0 3 0x14280 nfsidl nfsio 47143 163404 0 0 3 0x14280 nfsidl nfsio 65766 337482 0 0 3 0x14280 nfsidl nfsio 16397 341702 0 0 3 0x14280 nfsidl nfsio 24093 67853 0 0 3 0x14280 nfsidl nfsio 74471 289759 0 0 3 0x14280 nfsidl nfsio 3187 235004 0 0 3 0x14280 nfsidl nfsio 81423 209743 0 0 3 0x14280 nfsidl nfsio 87858 306193 0 0 3 0x14280 nfsidl nfsio 8914 370928 0 0 3 0x14280 nfsidl nfsio 72126 464230 0 0 3 0x14280 nfsidl nfsio 85888 341046 0 0 3 0x14280 nfsidl nfsio 65036 193030 72061 0 3 0x8000082 nanoslp syz-executor.0 36366 245045 72061 0 3 0x8000082 nanoslp syz-executor.5 81171 100381 0 0 3 0x14200 bored sosplice 97376 306649 72061 0 3 0x8000082 nanoslp syz-executor.6 72061 505379 81435 0 3 0x1a000082 thrsleep syz-fuzzer 72061 278241 81435 0 2 0x1e000002 syz-fuzzer 72061 421368 81435 0 3 0x1e000082 wait syz-fuzzer 72061 361606 81435 0 3 0x1e000082 wait syz-fuzzer 72061 1801 81435 0 3 0x1e000082 wait syz-fuzzer 72061 324053 81435 0 3 0x1e000082 wait syz-fuzzer 72061 148872 81435 0 3 0x1e000082 thrsleep syz-fuzzer 72061 281230 81435 0 3 0x1e000082 thrsleep syz-fuzzer 72061 494488 81435 0 3 0x1e000082 kqread syz-fuzzer 72061 432151 81435 0 3 0x1e000082 thrsleep syz-fuzzer 72061 224395 81435 0 3 0x1e000082 wait syz-fuzzer 72061 440099 81435 0 3 0x1e000082 wait syz-fuzzer 72061 313155 81435 0 3 0x1e000082 wait syz-fuzzer 72061 129906 81435 0 3 0x1e000082 wait syz-fuzzer 81435 64436 92059 0 3 0x810008a sigsusp ksh 92059 286276 85973 0 3 0x1800009a kqread sshd 85973 453691 1 0 3 0x18000088 kqread sshd *13728 79691 11638 73 7 0x19100010 syslogd 11638 278164 1 0 3 0x18100082 sbwait syslogd 40208 457802 1 0 3 0x18100080 kqread resolvd 81948 62565 48358 77 3 0x18100092 kqread dhcpleased 33164 20982 48358 77 3 0x18100092 kqread dhcpleased 48358 352292 1 0 3 0x18000080 kqread dhcpleased 74076 462861 0 0 3 0x14200 bored smr 66730 341985 0 0 2 0x14200 zerothread 82093 2489 0 0 3 0x14200 aiodoned aiodoned 15297 163559 0 0 3 0x14200 syncer update 93455 397697 0 0 3 0x14200 cleaner cleaner 97250 1340 0 0 3 0x14200 reaper reaper 83678 65542 0 0 3 0x14200 pgdaemon pagedaemon 28085 250571 0 0 3 0x14200 bored viomb 52346 415638 0 0 3 0x40014200 acpi0 acpi0 694 243453 0 0 3 0x14200 bored softnet3 61602 154214 0 0 3 0x14200 bored softnet2 76356 339128 0 0 3 0x14200 bored softnet1 76900 256988 0 0 3 0x14200 bored softnet0 22235 297022 0 0 3 0x14200 bored systqmp 78088 424009 0 0 3 0x14200 bored systq 68144 181935 0 0 3 0x40014200 tmoslp softclock 11822 255797 0 0 3 0x40014200 idle0 1 484312 0 0 3 0x8080082 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 10188 6485K 7007K 166960K 14895 0 pcb 15 18K 20K 166960K 359 0 rtable 222 8K 9K 166960K 956 0 pf 27 8K 10K 166960K 163 0 ifaddr 40 11K 12K 166960K 146 0 ifgroup 46 2K 2K 166960K 272 0 sysctl 3 0K 0K 166960K 3 0 counters 29 17K 17K 166960K 83 0 ioctlops 0 0K 2K 166960K 124 0 iov 0 0K 18K 166960K 158 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1422 89K 90K 166960K 3248 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 9K 166960K 55 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 1K 166960K 377 0 dirhash 12 2K 2K 166960K 54 0 ACPI 1697 195K 286K 166960K 12548 0 file desc 17 61K 77K 166960K 2307 0 sigio 0 0K 0K 166960K 38 0 proc 63 59K 91K 166960K 974 0 subproc 104 6K 6K 166960K 312 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 252 0 in_multi 88 6K 7K 166960K 307 0 ether_multi 1 0K 0K 166960K 11 0 mrt 1 0K 0K 166960K 10 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 79 360K 360K 166960K 79 0 exec 0 0K 1K 166960K 743 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 327 179K 179K 166960K 22054 0 UVM aobj 131 4K 6K 166960K 143 0 pinsyscall 37 74K 100K 166960K 3780 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 128 0 NDP 10 0K 1K 166960K 106 0 temp 74 6804K 7440K 166960K 23213 0 kqueue 12 18K 28K 166960K 301 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 120 222 0 219 1 0 1 1 0 8 0 rtentry 112 292 0 191 4 0 4 4 0 8 0 unpcb 144 1753 0 1740 6 0 6 6 0 8 5 syncache 336 43 0 43 1 0 1 1 0 8 1 tcpqe 32 143 0 143 1 0 1 1 0 8 1 tcpcb 808 1295 0 1288 16 6 10 16 0 8 8 arp 88 59 0 42 1 0 1 1 0 8 0 ipq 40 2 0 1 1 0 1 1 0 8 0 ipqe 40 5 0 4 1 0 1 1 0 8 0 inpcb 360 3195 0 3184 25 14 11 15 0 8 8 nd6 104 69 0 46 1 0 1 1 0 8 0 pkpcb 40 17 0 17 1 0 1 1 0 8 1 kcovpl 48 21 0 13 1 0 1 1 0 8 0 ppxss 1072 11 0 11 1 0 1 1 0 8 1 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 1084 0 644 31 0 31 31 0 8 0 art_table 32 1085 0 644 4 0 4 4 0 8 0 art_node 16 287 0 195 1 0 1 1 0 8 0 sysvmsgpl 40 30 0 6 1 0 1 1 0 8 0 semapl 112 373 0 363 1 0 1 1 0 8 0 shmpl 112 140 0 12 4 0 4 4 0 8 0 dirhash 1024 45 0 28 3 0 3 3 0 8 0 dino2pl 256 5139 0 3635 95 0 95 95 0 8 0 ffsino 240 5139 0 3635 90 0 90 90 0 8 0 nchpl 144 8458 0 6727 66 0 66 66 0 8 0 uvmvnodes 80 5926 0 0 121 0 121 121 0 8 0 vnodes 216 5926 0 0 330 0 330 330 0 8 0 namei 1024 28366 0 28366 2 0 2 2 0 8 2 vcpupl 2048 8 0 0 1 0 1 1 0 8 0 vmpool 664 9 0 1 1 0 1 1 0 8 0 kstatmem 264 128 0 108 2 0 2 2 0 8 0 scxspl 216 28848 0 28848 8 0 8 8 1 8 8 plimitpl 152 455 0 440 1 0 1 1 0 8 0 sigapl 424 2640 0 2574 8 0 8 8 0 8 0 futexpl 64 34915 0 34912 1 0 1 1 0 8 0 knotepl 120 22529 0 22445 11 0 11 11 0 8 7 kqueuepl 184 505 0 497 1 0 1 1 0 8 0 pipepl 288 411 0 383 7 0 7 7 0 8 4 fdescpl 432 2561 0 2533 4 0 4 4 0 8 0 filepl 120 16769 0 16528 14 0 14 14 0 8 4 lockfpl 104 717 0 715 1 0 1 1 0 8 0 lockfspl 48 237 0 235 1 0 1 1 0 8 0 sessionpl 144 38 0 22 1 0 1 1 0 8 0 pgrppl 48 58 0 42 1 0 1 1 0 8 0 ucredpl 104 2793 0 2780 1 0 1 1 0 8 0 zombiepl 144 2574 0 2574 1 0 1 1 0 8 1 processpl 1072 2640 0 2574 5 0 5 5 0 8 0 procpl 656 5285 0 5199 9 0 9 9 0 8 1 sosppl 168 65 0 65 1 0 1 1 0 8 1 sockpl 488 5240 0 5214 62 50 12 23 0 8 8 mcl64k 65536 52 0 52 1 0 1 1 0 8 1 mcl16k 16384 40 0 40 1 0 1 1 0 8 1 mcl12k 12288 105 0 105 1 0 1 1 0 8 1 mcl9k 9216 23 0 23 1 0 1 1 0 8 1 mcl8k 8192 175 0 175 1 0 1 1 0 8 1 mcl4k 4096 412 0 412 1 0 1 1 0 8 1 mcl2k2 2112 37 0 37 1 0 1 1 0 8 1 mcl2k 2048 32209 0 32129 34 15 19 29 0 8 5 mtagpl 96 283 0 182 4 0 4 4 0 8 0 mbufpl 256 86576 0 86308 225 193 32 70 0 8 8 bufpl 280 8549 0 2220 453 0 453 453 0 8 0 anonpl 24 472266 0 466344 84 0 84 84 0 188 28 amapchunkpl 152 73204 0 72552 41 0 41 41 0 158 12 amappl16 200 11901 0 11802 52 35 17 30 0 8 8 amappl15 192 12 0 12 1 0 1 1 0 8 1 amappl14 184 209 0 194 2 0 2 2 0 8 1 amappl13 176 15 0 14 1 0 1 1 0 8 0 amappl12 168 3428 0 3398 2 0 2 2 0 8 0 amappl11 160 64 0 53 1 0 1 1 0 8 0 amappl10 152 98 0 89 1 0 1 1 0 8 0 amappl9 144 189 0 188 1 0 1 1 0 8 0 amappl8 136 288 0 209 3 0 3 3 0 8 0 amappl7 128 47 0 36 1 0 1 1 0 8 0 amappl6 120 548 0 529 2 0 2 2 0 8 0 amappl5 112 228 0 216 1 0 1 1 0 8 0 amappl4 104 667 0 634 2 0 2 2 0 8 1 amappl3 96 14196 0 14116 3 0 3 3 0 8 0 amappl2 88 3195 0 3115 4 0 4 4 0 8 2 amappl1 80 18240 0 17747 22 3 19 22 0 8 8 amappl 88 21223 0 21022 6 0 6 6 0 92 0 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 128 253 0 253 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 72 142 0 12 3 0 3 3 0 8 0 uaddrrnd 24 2570 0 2534 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 2570 0 2534 1 0 1 1 0 8 0 vmmpekpl 168 20794 0 20730 4 0 4 4 0 8 0 vmmpepl 168 174911 0 172984 115 0 115 115 0 357 26 vmsppl 344 2569 0 2534 4 0 4 4 0 8 0 rwobjpl 24 55499 0 48357 45 0 45 45 0 8 1 pdppl 4096 5146 0 5076 192 120 72 74 0 8 2 pvpl 32 1109180 0 1097232 389 41 348 389 0 265 224 pmappl 216 2569 0 2534 3 0 3 3 0 8 1 extentpl 40 56 0 38 1 0 1 1 0 8 0 phpool 112 705 0 334 12 0 12 12 0 8 0 ddb> machine ddbcpu 0 No such command ddb> trace ffs2_balloc(fffffd806efb4f10,395b0,64,fffffd807f7d7680,1,ffff80002a6596d8) at ffs2_balloc+0x78e sys/ufs/ffs/ffs_balloc.c:614 ffs_write(ffff80002a659760) at ffs_write+0x3c7 sys/ufs/ffs/ffs_vnops.c:345 VOP_WRITE(fffffd807bd65708,ffff80002a659980,3,fffffd807f7d7680) at VOP_WRITE+0xc3 sys/kern/vfs_vops.c:245 vn_write(fffffd807e7740f8,ffff80002a659980,0) at vn_write+0x157 sys/kern/vfs_vnops.c:408 dofilewritev(ffff80002a62dc40,e,ffff80002a659980,0,ffff80002a659a40) at dofilewritev+0x1a9 sys/kern/sys_generic.c:375 sys_writev(ffff80002a62dc40,ffff80002a659af0,ffff80002a659a40) at sys_writev+0xab sys/kern/sys_generic.c:322 syscall(ffff80002a659af0) at syscall+0x72a sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x734e00b60230, count: -8 ddb> machine ddbcpu 1 No such command ddb> trace ffs2_balloc(fffffd806efb4f10,395b0,64,fffffd807f7d7680,1,ffff80002a6596d8) at ffs2_balloc+0x78e sys/ufs/ffs/ffs_balloc.c:614 ffs_write(ffff80002a659760) at ffs_write+0x3c7 sys/ufs/ffs/ffs_vnops.c:345 VOP_WRITE(fffffd807bd65708,ffff80002a659980,3,fffffd807f7d7680) at VOP_WRITE+0xc3 sys/kern/vfs_vops.c:245 vn_write(fffffd807e7740f8,ffff80002a659980,0) at vn_write+0x157 sys/kern/vfs_vnops.c:408 dofilewritev(ffff80002a62dc40,e,ffff80002a659980,0,ffff80002a659a40) at dofilewritev+0x1a9 sys/kern/sys_generic.c:375 sys_writev(ffff80002a62dc40,ffff80002a659af0,ffff80002a659a40) at sys_writev+0xab sys/kern/sys_generic.c:322 syscall(ffff80002a659af0) at syscall+0x72a sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x734e00b60230, count: -8