uvm_fault(0xffffffff82d44868, 0xffff800013762168, 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 *514685 61827 73 0x19100010 0x1 0 syslogd ffs2_balloc(fffffd8079323d28,e6e2d,67,fffffd807f7d7820,1,ffff80002a658f28) at ffs2_balloc+0x78e sys/ufs/ffs/ffs_balloc.c:614 ffs_write(ffff80002a658fb0) at ffs_write+0x3c7 sys/ufs/ffs/ffs_vnops.c:345 VOP_WRITE(fffffd805d3ecb10,ffff80002a659060,3,fffffd807f7d7820) at VOP_WRITE+0xc3 sys/kern/vfs_vops.c:245 ktrwriteraw(ffff80002a605d48,fffffd805d3ecb10,fffffd807f7d7820,ffff80002a659128,ffff80002a659100) at ktrwriteraw+0x149 sys/kern/kern_ktrace.c:682 ktrstruct(ffff80002a605d48,ffffffff8292f921,ffff80002a6592e0,20) at ktrstruct+0x166 ktrwrite2 sys/kern/kern_ktrace.c:645 [inline] ktrstruct(ffff80002a605d48,ffffffff8292f921,ffff80002a6592e0,20) at ktrstruct+0x166 sys/kern/kern_ktrace.c:308 sys_kevent(ffff80002a605d48,ffff80002a659560,ffff80002a6594b0) at sys_kevent+0x620 sys/kern/kern_event.c:1069 syscall(ffff80002a659560) at syscall+0x538 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x71aff3a62910, 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(0xffffffff82d44868, 0xffff800013762168, 0, 1) -> d ddb> trace ffs2_balloc(fffffd8079323d28,e6e2d,67,fffffd807f7d7820,1,ffff80002a658f28) at ffs2_balloc+0x78e sys/ufs/ffs/ffs_balloc.c:614 ffs_write(ffff80002a658fb0) at ffs_write+0x3c7 sys/ufs/ffs/ffs_vnops.c:345 VOP_WRITE(fffffd805d3ecb10,ffff80002a659060,3,fffffd807f7d7820) at VOP_WRITE+0xc3 sys/kern/vfs_vops.c:245 ktrwriteraw(ffff80002a605d48,fffffd805d3ecb10,fffffd807f7d7820,ffff80002a659128,ffff80002a659100) at ktrwriteraw+0x149 sys/kern/kern_ktrace.c:682 ktrstruct(ffff80002a605d48,ffffffff8292f921,ffff80002a6592e0,20) at ktrstruct+0x166 ktrwrite2 sys/kern/kern_ktrace.c:645 [inline] ktrstruct(ffff80002a605d48,ffffffff8292f921,ffff80002a6592e0,20) at ktrstruct+0x166 sys/kern/kern_ktrace.c:308 sys_kevent(ffff80002a605d48,ffff80002a659560,ffff80002a6594b0) at sys_kevent+0x620 sys/kern/kern_event.c:1069 syscall(ffff80002a659560) at syscall+0x538 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x71aff3a62910, count: -8 ddb> show registers rdi 0 rsi 0 rbp 0xffff80002a658ed0 rbx 0xfffffd8079323d28 rdx 0 rcx 0xffff800013762000 rax 0x2d r8 0xffffffffffffffff r9 0xffff80002a658f28 r10 0x11ba9c1e5edc6d9f r11 0x3462191f2dd6a04d r12 0x10 r13 0x1 r14 0xffffffff r15 0xfffffd807bd4c028 rip 0xffffffff81ba550e ffs2_balloc+0x78e cs 0x8 rflags 0x10202 __ALIGN_SIZE+0xf202 rsp 0xffff80002a658d60 ss 0x10 ffs2_balloc+0x78e: movq 0(%rcx,%rax,8),%r14 ddb> show proc PROC (syslogd) tid=514685 pid=61827 tcnt=1 stat=onproc flags process=19100010 proc=1 runpri=24, usrpri=51, slppri=24, nice=20 wchan=0x0, wmesg=, ps_single=0x0 forw=0xffffffffffffffff, list=0xffff80002a605aa0,0xffff80002a604818 process=0xffff8000ffff7680 user=0xffff80002a654000, vmspace=0xfffffd806fdaa428 estcpu=1, cpticks=1, pctcpu=0.0, user=0, sys=1, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 63015 440623 38872 0 2 0 syz-executor.7 63015 439584 38872 0 3 0x4000080 fsleep syz-executor.7 73308 375664 208 0 2 0 syz-executor.1 73308 438576 208 0 2 0x4000000 syz-executor.1 73308 388376 208 0 3 0x4000080 fsleep syz-executor.1 15122 192853 57571 0 2 0 syz-executor.0 15122 195448 57571 0 3 0x4000080 kqpoll syz-executor.0 15122 405069 57571 0 3 0x4000080 fsleep syz-executor.0 15122 141933 57571 0 3 0x4000080 fsleep syz-executor.0 18219 209899 31578 0 2 0x480 syz-executor.4 18219 370581 31578 0 3 0x4000080 netio syz-executor.4 18219 417791 31578 0 3 0x4000080 fsleep syz-executor.4 74795 207609 24880 -1 2 0x490 syz-executor.2 74795 373082 24880 -1 3 0x4000090 fsleep syz-executor.2 66525 350257 97640 0 2 0x2 syz-executor.6 57571 456514 97640 0 2 0x482 syz-executor.0 24880 249372 97640 0 2 0x482 syz-executor.2 47241 108634 97640 0 2 0x2 syz-executor.5 31578 257013 97640 0 2 0x482 syz-executor.4 208 218100 97640 0 2 0x482 syz-executor.1 9444 483609 0 0 3 0x14200 acct acct 38872 424820 97640 0 2 0x482 syz-executor.7 22865 143573 97640 0 2 0x2 syz-executor.3 76602 521096 0 0 3 0x14200 bored sosplice 97640 46095 71250 0 3 0x1a000082 thrsleep syz-fuzzer 97640 57937 71250 0 2 0x1e000482 syz-fuzzer 97640 183819 71250 0 3 0x1e000082 thrsleep syz-fuzzer 97640 401412 71250 0 3 0x1e000082 wait syz-fuzzer 97640 26829 71250 0 3 0x1e000082 wait syz-fuzzer 97640 86541 71250 0 3 0x1e000082 wait syz-fuzzer 97640 489319 71250 0 3 0x1e000082 kqread syz-fuzzer 97640 50519 71250 0 3 0x1e000082 wait syz-fuzzer 97640 137526 71250 0 3 0x1e000082 thrsleep syz-fuzzer 97640 305198 71250 0 3 0x1e000082 wait syz-fuzzer 97640 174093 71250 0 3 0x1e000082 thrsleep syz-fuzzer 97640 61957 71250 0 3 0x1e000082 wait syz-fuzzer 97640 27864 71250 0 3 0x1e000082 wait syz-fuzzer 97640 244552 71250 0 3 0x1e000082 wait syz-fuzzer 71250 420447 7413 0 3 0x810008a sigsusp ksh 7413 342471 84842 0 3 0x1800009a kqread sshd 24661 193265 1 0 3 0x18100083 ttyopn getty 84842 463798 1 0 3 0x18000088 kqread sshd *61827 514685 21084 73 7 0x19100011 syslogd 21084 387417 1 0 3 0x18100082 netio syslogd 49084 512087 1 0 3 0x18100080 kqread resolvd 61884 291179 55674 77 3 0x18100092 kqread dhcpleased 79640 29717 55674 77 3 0x18100092 kqread dhcpleased 55674 9066 1 0 3 0x18000080 kqread dhcpleased 66925 145651 0 0 2 0x14200 smr 18694 131246 0 0 2 0x14200 zerothread 63670 424749 0 0 3 0x14200 aiodoned aiodoned 19117 474786 0 0 3 0x14200 syncer update 42988 481520 0 0 3 0x14200 cleaner cleaner 53207 419196 0 0 3 0x14200 reaper reaper 48117 411719 0 0 3 0x14200 pgdaemon pagedaemon 56749 54564 0 0 3 0x14200 bored viomb 61458 139733 0 0 3 0x40014200 acpi0 acpi0 24512 318000 0 0 3 0x14200 bored softnet3 450 267237 0 0 3 0x14200 bored softnet2 7008 375970 0 0 3 0x14200 bored softnet1 16348 371250 0 0 3 0x14200 bored softnet0 59870 415181 0 0 3 0x14200 bored systqmp 58483 164138 0 0 3 0x14200 bored systq 83249 520285 0 0 2 0x40014200 softclock 95709 236535 0 0 3 0x40014200 idle0 1 303970 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 10220 6571K 7195K 166960K 62389 0 pcb 16 22K 24K 166960K 1953 0 rtable 224 11K 12K 166960K 6091 0 pf 33 9K 10K 166960K 750 0 ifaddr 42 14K 15K 166960K 744 0 ifgroup 58 2K 2K 166960K 1113 0 sysctl 3 0K 0K 166960K 9 0 counters 32 17K 18K 166960K 367 0 ioctlops 0 0K 2K 166960K 1402 0 iov 0 0K 28K 166960K 2399 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1609 101K 101K 166960K 17015 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 9K 166960K 322 0 VM map 2 1K 1K 166960K 2 0 sem 10 1K 1K 166960K 16 0 dirhash 9 1K 2K 166960K 24 0 ACPI 1697 195K 286K 166960K 12548 0 file desc 15 53K 77K 166960K 23527 0 sigio 0 0K 0K 166960K 780 0 proc 64 59K 92K 166960K 4736 0 subproc 104 6K 7K 166960K 1640 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 1143 0 in_multi 88 6K 7K 166960K 1589 0 ether_multi 1 0K 0K 166960K 40 0 mrt 1 0K 0K 166960K 40 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 229 1023K 1023K 166960K 229 0 exec 0 0K 1K 166960K 4185 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 566 661K 669K 166960K 213756 0 UVM aobj 131 4K 4K 166960K 139 0 pinsyscall 22 44K 100K 166960K 5120 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 1K 166960K 613 0 NDP 15 0K 1K 166960K 598 0 temp 74 6804K 7176K 166960K 145119 0 kqueue 12 18K 30K 166960K 1918 0 SYN cache 2 104K 112K 166960K 3 0 ddb> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle rtpcb 120 1289 0 1286 3 0 3 3 0 8 2 rtentry 112 1722 0 1623 5 1 4 4 0 8 0 unpcb 144 17050 0 17037 8 0 8 8 0 8 7 syncache 336 219 0 219 2 1 1 1 0 8 1 tcpqe 32 538 33013 538 2 1 1 1 0 8 1 tcpcb 808 7431 0 7418 31 20 11 15 0 8 8 arp 88 345 0 329 1 0 1 1 0 8 0 ipq 40 31 0 31 2 1 1 1 0 8 1 ipqe 40 615 0 615 2 1 1 1 0 8 1 inpcb 360 18979 0 18961 69 59 10 21 0 8 7 nd6 104 385 0 364 1 0 1 1 0 8 0 pkpcb 40 136 0 136 1 0 1 1 0 8 1 kcovpl 48 126 0 118 1 0 1 1 0 8 0 ppxss 1072 167 0 167 2 1 1 1 0 8 1 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 6118 0 5699 64 37 27 31 0 8 0 art_table 32 6119 0 5699 4 0 4 4 0 8 0 art_node 16 1670 0 1580 1 0 1 1 0 8 0 semupl 112 3 0 3 1 1 0 1 0 8 0 semapl 112 10 0 2 1 0 1 1 0 8 0 shmpl 112 136 0 8 4 0 4 4 0 8 0 dirhash 1024 25 0 18 3 0 3 3 0 8 1 dino2pl 256 32244 0 30633 101 0 101 101 0 8 0 ffsino 240 32244 0 30633 95 0 95 95 0 8 0 nchpl 144 63520 0 61797 66 0 66 66 0 8 0 uvmvnodes 80 6695 0 0 137 0 137 137 0 8 0 vnodes 216 6695 0 0 372 0 372 372 0 8 0 namei 1024 226523 0 226521 3 1 2 2 0 8 1 vcpupl 2048 301 0 0 38 0 38 38 0 8 0 vmpool 664 414 0 113 26 0 26 26 0 8 0 kstatmem 264 696 0 670 3 0 3 3 0 8 1 scxspl 216 195078 0 195078 11 7 4 8 1 8 4 plimitpl 152 3051 0 3036 1 0 1 1 0 8 0 sigapl 424 23775 0 23731 9 1 8 8 0 8 2 futexpl 64 216746 0 216740 1 0 1 1 0 8 0 knotepl 120 202569 0 202487 28 16 12 16 0 8 7 kqueuepl 184 5131 0 5122 5 1 4 4 0 8 3 pipepl 288 4390 0 4362 16 5 11 11 0 8 8 fdescpl 432 23572 0 23546 4 0 4 4 0 8 0 filepl 120 142897 0 142655 26 10 16 21 0 8 7 lockfpl 104 6013 0 6010 3 1 2 2 0 8 1 lockfspl 48 2414 0 2411 1 0 1 1 0 8 0 sessionpl 144 141 0 125 1 0 1 1 0 8 0 pgrppl 48 874 0 858 1 0 1 1 0 8 0 ucredpl 104 22018 0 22004 1 0 1 1 0 8 0 zombiepl 144 23731 0 23731 1 0 1 1 0 8 1 processpl 1072 23775 0 23731 6 1 5 5 0 8 1 procpl 680 57413 0 57347 9 0 9 9 0 8 1 sosppl 168 280 0 277 2 1 1 1 0 8 0 sockpl 488 37560 0 37526 420 406 14 32 0 8 8 mcl64k 65536 1117 0 1117 2 1 1 1 0 8 1 mcl16k 16384 466 0 466 2 1 1 1 0 8 1 mcl12k 12288 951 0 951 2 1 1 1 0 8 1 mcl9k 9216 498 0 498 2 1 1 1 0 8 1 mcl8k 8192 1754 0 1754 2 1 1 1 0 8 1 mcl4k 4096 2439 0 2439 8 4 4 4 0 8 4 mcl2k2 2112 185 0 185 2 1 1 1 0 8 1 mcl2k 2048 124404 0 124361 54 40 14 30 0 8 7 mtagpl 96 5117 0 4891 28 15 13 18 0 8 5 mbufpl 256 472477 0 472167 983 945 38 430 0 8 8 bufpl 280 44615 0 37908 480 0 480 480 0 8 0 anonpl 24 2142802 0 2129748 152 14 138 138 0 188 31 amapchunkpl 152 679654 0 678761 66 9 57 57 0 158 18 amappl16 200 39249 0 38737 93 57 36 39 0 8 8 amappl15 192 150 0 148 1 0 1 1 0 8 0 amappl14 184 505 0 492 2 1 1 2 0 8 0 amappl13 176 101 0 101 2 1 1 1 0 8 1 amappl12 168 25947 0 25917 2 0 2 2 0 8 0 amappl11 160 48 0 38 1 0 1 1 0 8 0 amappl10 152 159 0 149 1 0 1 1 0 8 0 amappl9 144 374 0 372 1 0 1 1 0 8 0 amappl8 136 978 0 872 4 0 4 4 0 8 0 amappl7 128 177 0 163 1 0 1 1 0 8 0 amappl6 120 1921 0 1900 2 1 1 2 0 8 0 amappl5 112 1107 0 1095 1 0 1 1 0 8 0 amappl4 104 1669 0 1634 3 1 2 2 0 8 0 amappl3 96 132762 0 132676 3 0 3 3 0 8 0 amappl2 88 25263 0 25189 4 1 3 4 0 8 1 amappl1 80 99585 0 99101 22 10 12 21 0 8 1 amappl 88 211759 0 211469 8 0 8 8 0 92 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 72 138 0 8 3 0 3 3 0 8 0 uaddrrnd 24 23986 0 23659 2 0 2 2 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 23986 0 23659 2 0 2 2 0 8 0 vmmpekpl 168 156482 0 156389 5 0 5 5 0 8 0 vmmpepl 168 1422143 0 1419555 175 26 149 149 0 357 12 vmsppl 352 23985 0 23659 30 0 30 30 0 8 0 rwobjpl 24 317279 0 308831 53 1 52 52 0 8 0 pdppl 4096 47978 0 47619 1545 1181 364 364 0 8 5 pvpl 32 6295822 0 6277121 465 179 286 346 0 265 100 pmappl 216 23985 0 23659 19 0 19 19 0 8 0 extentpl 40 56 0 38 1 0 1 1 0 8 0 phpool 112 2962 0 2239 31 0 31 31 0 8 8 ddb> machine ddbcpu 0 No such command ddb> trace ffs2_balloc(fffffd8079323d28,e6e2d,67,fffffd807f7d7820,1,ffff80002a658f28) at ffs2_balloc+0x78e sys/ufs/ffs/ffs_balloc.c:614 ffs_write(ffff80002a658fb0) at ffs_write+0x3c7 sys/ufs/ffs/ffs_vnops.c:345 VOP_WRITE(fffffd805d3ecb10,ffff80002a659060,3,fffffd807f7d7820) at VOP_WRITE+0xc3 sys/kern/vfs_vops.c:245 ktrwriteraw(ffff80002a605d48,fffffd805d3ecb10,fffffd807f7d7820,ffff80002a659128,ffff80002a659100) at ktrwriteraw+0x149 sys/kern/kern_ktrace.c:682 ktrstruct(ffff80002a605d48,ffffffff8292f921,ffff80002a6592e0,20) at ktrstruct+0x166 ktrwrite2 sys/kern/kern_ktrace.c:645 [inline] ktrstruct(ffff80002a605d48,ffffffff8292f921,ffff80002a6592e0,20) at ktrstruct+0x166 sys/kern/kern_ktrace.c:308 sys_kevent(ffff80002a605d48,ffff80002a659560,ffff80002a6594b0) at sys_kevent+0x620 sys/kern/kern_event.c:1069 syscall(ffff80002a659560) at syscall+0x538 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x71aff3a62910, count: -8 ddb> machine ddbcpu 1 No such command ddb> trace ffs2_balloc(fffffd8079323d28,e6e2d,67,fffffd807f7d7820,1,ffff80002a658f28) at ffs2_balloc+0x78e sys/ufs/ffs/ffs_balloc.c:614 ffs_write(ffff80002a658fb0) at ffs_write+0x3c7 sys/ufs/ffs/ffs_vnops.c:345 VOP_WRITE(fffffd805d3ecb10,ffff80002a659060,3,fffffd807f7d7820) at VOP_WRITE+0xc3 sys/kern/vfs_vops.c:245 ktrwriteraw(ffff80002a605d48,fffffd805d3ecb10,fffffd807f7d7820,ffff80002a659128,ffff80002a659100) at ktrwriteraw+0x149 sys/kern/kern_ktrace.c:682 ktrstruct(ffff80002a605d48,ffffffff8292f921,ffff80002a6592e0,20) at ktrstruct+0x166 ktrwrite2 sys/kern/kern_ktrace.c:645 [inline] ktrstruct(ffff80002a605d48,ffffffff8292f921,ffff80002a6592e0,20) at ktrstruct+0x166 sys/kern/kern_ktrace.c:308 sys_kevent(ffff80002a605d48,ffff80002a659560,ffff80002a6594b0) at sys_kevent+0x620 sys/kern/kern_event.c:1069 syscall(ffff80002a659560) at syscall+0x538 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x71aff3a62910, count: -8