uvm_fault(0xfffffd806cd365d0, 0x18, 0, 1) -> e kernel: page fault trap, code=0 Stopped at checkalias+0xb7: movl 0x18(%r13),%ebx TID PID UID PRFLAGS PFLAGS CPU COMMAND *235017 22270 0 0 0x4000000 0 syz-executor checkalias(fffffd806ea38398,21700,0) at checkalias+0xb7 sys/kern/vfs_subr.c:574 cdevvp(21700,ffff80003c8fce70) at cdevvp+0xd2 getdevvp sys/kern/vfs_subr.c:-1 [inline] cdevvp(21700,ffff80003c8fce70) at cdevvp+0xd2 sys/kern/vfs_subr.c:517 spec_open_clone(ffff80003c8fcf48) at spec_open_clone+0x1e2 sys/kern/spec_vnops.c:713 spec_open(ffff80003c8fcf48) at spec_open+0x316 sys/kern/spec_vnops.c:148 VOP_OPEN(fffffd806f8ca618,ff,fffffd8007ffd410,ffff80002f0bcd18) at VOP_OPEN+0x82 sys/kern/vfs_vops.c:138 vn_open(ffff80003c8fd190,ff,0) at vn_open+0x6a0 sys/kern/vfs_vnops.c:177 doopenat(ffff80002f0bcd18,ffffff9c,200000000100,fe,0,0,76a5a96e75186c81) at doopenat+0x352 sys/kern/vfs_syscalls.c:1155 sys_openat(ffff80002f0bcd18,ffff80003c8fd430,ffff80003c8fd380) at sys_openat+0x58 sys/kern/vfs_syscalls.c:1094 syscall(ffff80003c8fd430) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80003c8fd430) at syscall+0x962 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xabf87492080, count: 5 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(0xfffffd806cd365d0, 0x18, 0, 1) -> e ddb> trace checkalias(fffffd806ea38398,21700,0) at checkalias+0xb7 sys/kern/vfs_subr.c:574 cdevvp(21700,ffff80003c8fce70) at cdevvp+0xd2 getdevvp sys/kern/vfs_subr.c:-1 [inline] cdevvp(21700,ffff80003c8fce70) at cdevvp+0xd2 sys/kern/vfs_subr.c:517 spec_open_clone(ffff80003c8fcf48) at spec_open_clone+0x1e2 sys/kern/spec_vnops.c:713 spec_open(ffff80003c8fcf48) at spec_open+0x316 sys/kern/spec_vnops.c:148 VOP_OPEN(fffffd806f8ca618,ff,fffffd8007ffd410,ffff80002f0bcd18) at VOP_OPEN+0x82 sys/kern/vfs_vops.c:138 vn_open(ffff80003c8fd190,ff,0) at vn_open+0x6a0 sys/kern/vfs_vnops.c:177 doopenat(ffff80002f0bcd18,ffffff9c,200000000100,fe,0,0,76a5a96e75186c81) at doopenat+0x352 sys/kern/vfs_syscalls.c:1155 sys_openat(ffff80002f0bcd18,ffff80003c8fd430,ffff80003c8fd380) at sys_openat+0x58 sys/kern/vfs_syscalls.c:1094 syscall(ffff80003c8fd430) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80003c8fd430) at syscall+0x962 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xabf87492080, count: -10 ddb> show registers rdi 0xffff8000314c8000 rsi 0x348 rbp 0xffff80003c8fcdf0 rbx 0x4 rdx 0xffff8000314c8000 rcx 0x347 rax 0xffffffff825b0aec checkalias+0x1bc r8 0 r9 0xffffffffffffffff r10 0xa0e9e59633ee0d5 r11 0x4852019cb4ed349a r12 0 r13 0 r14 0x21700 acpi_pdirpa+0xd571 r15 0xfffffd8064cbaa40 rip 0xffffffff825b09e7 checkalias+0xb7 cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff80003c8fcd80 ss 0x10 checkalias+0xb7: movl 0x18(%r13),%ebx ddb> show proc PROC (syz-executor) tid=235017 pid=22270 tcnt=2 stat=onproc flags process=0 proc=4000000 runpri=50, usrpri=50, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80002f0bca80,0xffff80002f0bdcb8 process=0xffff8000ffffa898 user=0xffff80003c8f8000, vmspace=0xfffffd806cd365d0 estcpu=36, cpticks=1, pctcpu=0.0, user=0, sys=1, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 46304 182863 91692 0 2 0x82000 syz-executor 46304 475563 91692 0 3 0x4002000 suspend syz-executor 22270 334205 63305 0 2 0 syz-executor *22270 235017 63305 0 7 0x4000000 syz-executor 74727 287902 86390 0 3 0x80 nanoslp syz-executor 74727 377658 86390 0 3 0x4000080 nanoslp syz-executor 63566 226016 17684 0 3 0x80 nanoslp syz-executor 63566 146965 17684 0 3 0x4000080 ttyin syz-executor 63566 467908 17684 0 3 0x4000080 fsleep syz-executor 96100 470341 0 0 3 0x14200 acct acct 86390 6957 95533 0 3 0x82 nanoslp syz-executor 17684 222788 95533 0 3 0x82 nanoslp syz-executor 72124 353607 95533 0 3 0x82 wait syz-executor 7805 337508 95533 0 2 0x2 syz-executor 63305 382735 95533 0 3 0x82 nanoslp syz-executor 74215 381959 95533 0 3 0x82 nanoslp syz-executor 69959 57442 95533 0 3 0x82 wait syz-executor 91692 84542 95533 0 3 0x82 nanoslp syz-executor 95533 399221 6288 0 3 0x82 kqread syz-executor 6288 71089 79055 0 3 0x10008a sigsusp ksh 79055 202785 45872 0 3 0x98 kqread sshd-session 45872 417095 97512 0 3 0x92 kqread sshd-session 93096 285330 1 0 3 0x100083 ttyopn getty 97512 57613 1 0 3 0x88 kqread sshd 38687 465928 6990 73 3 0x1100090 kqread syslogd 6990 424762 1 0 3 0x100082 sbwait syslogd 76588 521023 1 0 3 0x100080 kqread resolvd 50136 417352 82440 77 3 0x100092 kqread dhcpleased 69351 508973 82440 77 3 0x100092 kqread dhcpleased 82440 306779 1 0 3 0x80 kqread dhcpleased 11723 192476 0 0 3 0x14200 bored smr 23028 169538 0 0 2 0x14200 zerothread 56822 374641 0 0 3 0x14200 aiodoned aiodoned 40244 217664 0 0 3 0x14200 syncer update 54845 173798 0 0 3 0x14200 cleaner cleaner 57578 84868 0 0 3 0x14200 reaper reaper 41562 366550 0 0 3 0x14200 pgdaemon pagedaemon 98354 56215 0 0 3 0x14200 bored viomb 95174 57257 0 0 3 0x40014200 acpi0 acpi0 22061 204457 0 0 2 0x14200 softnet0 56829 445923 0 0 3 0x14200 bored systqmp 78243 16064 0 0 3 0x14200 bored systq 84591 33782 0 0 3 0x40014200 tmoslp softclock 92487 39433 0 0 3 0x40014200 idle0 1 304515 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 11077 12124K 12721K 166960K 13565 0 pcb 17 12K 12K 166960K 166 0 rtable 190 16K 17K 166960K 714 0 pf 41 15K 18K 166960K 99 0 ifaddr 33 5K 7K 166960K 73 0 ifgroup 51 2K 2K 166960K 113 0 sysctl 3 1K 9K 166960K 10 0 counters 34 17K 18K 166960K 60 0 ioctlops 0 0K 4K 166960K 226 0 iov 0 0K 20K 166960K 161 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1415 89K 89K 166960K 2171 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 13 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 76 0 dirhash 12 2K 2K 166960K 18 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 17 61K 236K 166960K 788 0 sigio 0 0K 0K 166960K 11 0 proc 60 59K 83K 166960K 602 0 subproc 72 4K 4K 166960K 81 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 102 0 in_multi 60 4K 7K 166960K 140 0 ether_multi 1 0K 0K 166960K 8 0 mrt 1 0K 0K 166960K 22 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 482 0 fusefs mount 1 32K 32K 166960K 1 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 226 144K 162K 166960K 8663 0 UVM aobj 12 14K 14K 166960K 15 0 pinsyscall 38 76K 95K 166960K 1902 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 1K 166960K 38 0 NDP 12 0K 2K 166960K 48 0 temp 58 9071K 9135K 166960K 46750 0 kqueue 13 20K 30K 166960K 133 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 88 0 85 1 0 1 1 0 8 0 rtentry 136 213 0 146 4 0 4 4 0 8 0 unpcb 144 577 0 562 3 2 1 3 0 8 0 syncache 336 5 0 5 1 1 0 1 0 8 0 tcpqe 32 3 0 3 1 1 0 1 0 8 0 tcpcb 736 220 0 214 4 3 1 4 0 8 0 arp 96 25 0 11 1 0 1 1 0 8 0 ipq 40 3 0 0 1 0 1 1 0 8 0 ipqe 40 5 0 2 1 0 1 1 0 8 0 inpcb 328 787 0 773 7 5 2 7 0 8 0 ip6q 72 1 0 0 1 0 1 1 0 8 0 ip6af 40 1 0 0 1 0 1 1 0 8 0 nd6 112 30 0 16 1 0 1 1 0 8 0 pkpcb 40 1 0 1 1 1 0 1 0 8 0 kcovpl 48 9 0 1 1 0 1 1 0 8 0 ppxss 1072 17 0 17 1 1 0 1 0 8 0 pppxif 1384 2 0 2 1 1 0 1 0 8 0 pfstscr 40 1 0 1 1 1 0 1 0 8 0 pfrktable 1344 6 0 2 1 0 1 1 0 8 0 pfanchor 1288 2 0 1 1 0 1 1 0 8 0 pftag 88 4 0 2 1 0 1 1 0 8 0 pfqueue 320 4 0 1 1 0 1 1 0 8 0 pfstitem 24 4 0 0 1 0 1 1 0 8 0 pfstkey 128 8 0 4 1 0 1 1 0 8 0 pfstate 384 4 0 2 1 0 1 1 0 8 0 pfrule 1360 7 0 5 1 0 1 1 0 8 0 rttmr 136 1 0 1 1 1 0 1 0 8 0 art_heap8 4096 3 0 0 3 0 3 3 0 8 0 art_heap4 256 601 0 321 31 9 22 31 0 8 0 art_table 40 604 0 321 5 0 5 5 0 8 0 art_node 32 147 0 87 1 0 1 1 0 8 0 sysvmsgpl 40 21 0 12 1 0 1 1 0 8 0 semupl 112 2 0 2 1 1 0 1 0 8 0 semapl 112 73 0 63 1 0 1 1 0 8 0 shmpl 112 5 0 2 1 0 1 1 0 8 0 dirhash 1024 21 0 4 3 0 3 3 0 8 0 dino2pl 256 2806 0 1350 92 0 92 92 0 8 0 ffsino 256 2806 0 1350 92 0 92 92 0 8 0 nchpl 144 3939 0 2242 64 0 64 64 0 8 0 rtmask 32 4 0 4 1 1 0 1 0 8 0 vnodes 216 3412 0 0 190 0 190 190 0 8 0 vnodes: pool(0xffffffff839f9c08:vnodes): page inconsistency: page 0x0; at page head addr 0xfffffd8064cbaf90 (p 0xfffffd8064cba000) namei 1024 13437 0 13437 3 2 1 2 0 8 1 vcpupl 3904 7 0 1 1 0 1 1 0 8 0 vmpool 808 7 0 1 1 0 1 1 0 8 0 pfiaddrpl 120 2 0 0 1 0 1 1 0 8 0 kstatmem 264 60 0 36 3 0 3 3 0 8 0 scsiplug 72 5 0 5 2 1 1 1 0 8 1 scxspl 216 16735 0 16735 8 7 1 8 1 8 1 plimitpl 152 177 0 159 1 0 1 1 0 8 0 sigapl 424 1070 0 1027 6 1 5 6 0 8 0 knotepl 120 444179 0 444132 21 19 2 16 0 8 0 kqueuepl 184 341 0 332 4 3 1 4 0 8 0 pipepl 304 239 0 212 5 2 3 5 0 8 0 fdescpl 448 1054 0 1025 5 1 4 5 0 8 0 filepl 120 6907 0 6686 11 3 8 11 0 8 0 lockfpl 104 311 0 308 2 1 1 2 0 8 0 lockfspl 48 130 0 127 1 0 1 1 0 8 0 sessionpl 144 24 0 16 1 0 1 1 0 8 0 pgrppl 48 33 0 17 1 0 1 1 0 8 0 ucredpl 104 1117 0 1106 1 0 1 1 0 8 0 zombiepl 144 1035 0 1032 1 0 1 1 0 8 0 processpl 1152 1070 0 1027 4 0 4 4 0 8 0 procpl 664 2043 0 1995 6 1 5 6 0 8 0 sosppl 176 5 0 5 1 1 0 1 0 8 0 sockpl 552 1471 0 1439 8 5 3 8 0 8 0 mcl64k 65536 64 0 63 1 0 1 1 0 8 0 mcl9k 9216 1 0 1 1 1 0 1 0 8 0 mcl8k 8192 13 0 13 1 1 0 1 0 8 0 mcl4k 4096 3308 0 3252 13 5 8 13 0 8 0 mcl2k 2048 912 0 910 8 7 1 8 0 8 0 mtagpl 96 12 0 8 1 0 1 1 0 8 0 mbufpl 256 11713 0 11569 17 4 13 17 0 8 0 bufpl 280 5953 0 104 418 0 418 418 0 8 0 anonpl 24 206429 0 196236 90 16 74 90 0 187 0 amapchunkpl 152 28861 0 28193 31 0 31 31 0 158 0 amappl16 200 4246 0 3986 34 8 26 32 0 8 0 amappl15 192 5 0 5 1 1 0 1 0 8 0 amappl14 184 422 0 421 1 0 1 1 0 8 0 amappl13 176 121 0 111 1 0 1 1 0 8 0 amappl12 168 1298 0 1269 2 0 2 2 0 8 0 amappl11 160 9 0 9 1 1 0 1 0 8 0 amappl10 152 75 0 64 1 0 1 1 0 8 0 amappl9 144 263 0 263 1 1 0 1 0 8 0 amappl8 136 119 0 117 1 0 1 1 0 8 0 amappl7 128 145 0 134 1 0 1 1 0 8 0 amappl6 120 167 0 166 1 0 1 1 0 8 0 amappl5 112 91 0 83 1 0 1 1 0 8 0 amappl4 104 266 0 249 1 0 1 1 0 8 0 amappl3 96 5579 0 5473 4 0 4 4 0 8 0 amappl2 88 536 0 482 2 0 2 2 0 8 0 amappl1 80 12665 0 12119 15 2 13 15 0 8 0 amappl 88 7833 0 7669 5 0 5 5 0 92 0 uvmvnodes 80 117 0 0 3 0 3 3 0 8 0 dma4096 4096 2 0 2 2 1 1 1 0 8 1 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 128 254 0 254 1 1 0 1 0 8 0 dma64 64 7 0 7 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 14 0 3 1 0 1 1 0 8 0 uaddrrnd 24 1054 0 1025 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1054 0 1025 1 0 1 1 0 8 0 vmmpekpl 168 10227 0 10189 2 0 2 2 0 8 0 vmmpepl 168 74920 0 72905 108 8 100 108 0 357 0 vmsppl 368 1053 0 1025 4 1 3 4 0 8 0 rwobjpl 40 23067 0 21866 17 1 16 17 0 8 0 pdppl 4096 2128 0 2058 106 34 72 80 0 8 2 pvpl 32 513027 0 496092 177 21 156 177 0 265 0 pmappl 216 1060 0 1026 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 390 0 70 11 0 11 11 0 8 0 ddb> machine ddbcpu 0 No such command ddb> trace checkalias(fffffd806ea38398,21700,0) at checkalias+0xb7 sys/kern/vfs_subr.c:574 cdevvp(21700,ffff80003c8fce70) at cdevvp+0xd2 getdevvp sys/kern/vfs_subr.c:-1 [inline] cdevvp(21700,ffff80003c8fce70) at cdevvp+0xd2 sys/kern/vfs_subr.c:517 spec_open_clone(ffff80003c8fcf48) at spec_open_clone+0x1e2 sys/kern/spec_vnops.c:713 spec_open(ffff80003c8fcf48) at spec_open+0x316 sys/kern/spec_vnops.c:148 VOP_OPEN(fffffd806f8ca618,ff,fffffd8007ffd410,ffff80002f0bcd18) at VOP_OPEN+0x82 sys/kern/vfs_vops.c:138 vn_open(ffff80003c8fd190,ff,0) at vn_open+0x6a0 sys/kern/vfs_vnops.c:177 doopenat(ffff80002f0bcd18,ffffff9c,200000000100,fe,0,0,76a5a96e75186c81) at doopenat+0x352 sys/kern/vfs_syscalls.c:1155 sys_openat(ffff80002f0bcd18,ffff80003c8fd430,ffff80003c8fd380) at sys_openat+0x58 sys/kern/vfs_syscalls.c:1094 syscall(ffff80003c8fd430) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80003c8fd430) at syscall+0x962 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xabf87492080, count: -10 ddb> machine ddbcpu 1 No such command ddb> trace checkalias(fffffd806ea38398,21700,0) at checkalias+0xb7 sys/kern/vfs_subr.c:574 cdevvp(21700,ffff80003c8fce70) at cdevvp+0xd2 getdevvp sys/kern/vfs_subr.c:-1 [inline] cdevvp(21700,ffff80003c8fce70) at cdevvp+0xd2 sys/kern/vfs_subr.c:517 spec_open_clone(ffff80003c8fcf48) at spec_open_clone+0x1e2 sys/kern/spec_vnops.c:713 spec_open(ffff80003c8fcf48) at spec_open+0x316 sys/kern/spec_vnops.c:148 VOP_OPEN(fffffd806f8ca618,ff,fffffd8007ffd410,ffff80002f0bcd18) at VOP_OPEN+0x82 sys/kern/vfs_vops.c:138 vn_open(ffff80003c8fd190,ff,0) at vn_open+0x6a0 sys/kern/vfs_vnops.c:177 doopenat(ffff80002f0bcd18,ffffff9c,200000000100,fe,0,0,76a5a96e75186c81) at doopenat+0x352 sys/kern/vfs_syscalls.c:1155 sys_openat(ffff80002f0bcd18,ffff80003c8fd430,ffff80003c8fd380) at sys_openat+0x58 sys/kern/vfs_syscalls.c:1094 syscall(ffff80003c8fd430) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80003c8fd430) at syscall+0x962 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xabf87492080, count: -10