uvm_fault(0xfffffd806fc80b88, 0x2d0, 0, 1) -> e kernel: page fault trap, code=0 Stopped at ufsdirhash_lookup+0x53d: movl 0(%rax,%rcx,4),%r15d TID PID UID PRFLAGS PFLAGS CPU COMMAND *454835 90742 0 0x2 0 0 syz-executor ufsdirhash_lookup(fffffd8070ae6f00,ffff80003b0f4402,10,fffffd8070ae6fbc,ffff80003c92ad10,0) at ufsdirhash_lookup+0x53d sys/ufs/ufs/ufs_dirhash.c:391 ufs_lookup() at ufs_lookup+0xf66 sys/ufs/ufs/ufs_lookup.c:214 VOP_LOOKUP(fffffd8070ae4898,ffff80003c92b058,ffff80003c92b088) at VOP_LOOKUP+0x6e sys/kern/vfs_vops.c:85 vfs_lookup(ffff80003c92b028) at vfs_lookup+0x9ca sys/kern/vfs_lookup.c:585 namei(ffff80003c92b028) at namei+0x7bf sys/kern/vfs_lookup.c:250 dofchmodat(ffff80003c900fb0,ffffff9c,70ad71a810e0,1ff,0) at dofchmodat+0x162 sys/kern/vfs_syscalls.c:2325 syscall(ffff80003c92b210) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80003c92b210) at syscall+0x962 sys/arch/amd64/amd64/trap.c:791 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x70ad71a81110, 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(0xfffffd806fc80b88, 0x2d0, 0, 1) -> e ddb> show kasan No such command ddb> trace ufsdirhash_lookup(fffffd8070ae6f00,ffff80003b0f4402,10,fffffd8070ae6fbc,ffff80003c92ad10,0) at ufsdirhash_lookup+0x53d sys/ufs/ufs/ufs_dirhash.c:391 ufs_lookup() at ufs_lookup+0xf66 sys/ufs/ufs/ufs_lookup.c:214 VOP_LOOKUP(fffffd8070ae4898,ffff80003c92b058,ffff80003c92b088) at VOP_LOOKUP+0x6e sys/kern/vfs_vops.c:85 vfs_lookup(ffff80003c92b028) at vfs_lookup+0x9ca sys/kern/vfs_lookup.c:585 namei(ffff80003c92b028) at namei+0x7bf sys/kern/vfs_lookup.c:250 dofchmodat(ffff80003c900fb0,ffffff9c,70ad71a810e0,1ff,0) at dofchmodat+0x162 sys/kern/vfs_syscalls.c:2325 syscall(ffff80003c92b210) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80003c92b210) at syscall+0x962 sys/arch/amd64/amd64/trap.c:791 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x70ad71a81110, count: -8 ddb> show registers rdi 0 rsi 0 rbp 0xffff80003c92acc0 rbx 0xffff800000c55a70 rdx 0 rcx 0xb4 rax 0 r8 0x30 r9 0 r10 0xc2a88e01655e1d39 r11 0xb4e2461cd9060e8b r12 0x200 r13 0xffff8000016e1e00 r14 0xb4 r15 0x200 rip 0xffffffff8287cc1d ufsdirhash_lookup+0x53d cs 0x8 rflags 0x10247 __ALIGN_SIZE+0xf247 rsp 0xffff80003c92abe0 ss 0 ufsdirhash_lookup+0x53d: movl 0(%rax,%rcx,4),%r15d ddb> show proc PROC (syz-executor) tid=454835 pid=90742 tcnt=1 stat=onproc flags process=2 proc=0 runpri=32, usrpri=50, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80003b0f62c8,0xffff80003c900d28 process=0xffff800045ff96c8 user=0xffff80003c926000, vmspace=0xfffffd806fc80b88 estcpu=36, cpticks=0, pctcpu=0.0, user=0, sys=0, intr=0 ddb> ps PID TID PPID UID S PRLAGS PFLAGS WAIT COMMAND 79891 194648 65988 0 2 0x2 0 syz-executor 55832 507234 13910 0 2 0 0 syz-executor 55832 278158 13910 0 2 0 0x4000000 syz-executor *90742 454835 65988 0 7 0x2 0 syz-executor 77225 342941 65988 0 3 0x2 0 clonelk syz-executor 36391 259838 65988 0 2 0x2 0 syz-executor 13910 158632 65988 0 3 0x2 0x80 nanoslp syz-executor 22809 431014 0 0 3 0x14000 0x280 nfsidl nfsio 88503 75646 0 0 3 0x14000 0x280 nfsidl nfsio 62737 228243 0 0 3 0x14000 0x280 nfsidl nfsio 75840 187687 0 0 3 0x14000 0x280 nfsidl nfsio 74953 89213 0 0 3 0x14000 0x280 nfsidl nfsio 16757 18122 0 0 3 0x14000 0x280 nfsidl nfsio 76127 420531 0 0 3 0x14000 0x280 nfsidl nfsio 54115 413041 0 0 3 0x14000 0x280 nfsidl nfsio 92296 75407 0 0 3 0x14000 0x280 nfsidl nfsio 95352 138751 0 0 3 0x14000 0x280 nfsidl nfsio 65250 413893 0 0 3 0x14000 0x280 nfsidl nfsio 4680 449445 0 0 3 0x14000 0x280 nfsidl nfsio 19018 329589 0 0 3 0x14000 0x280 nfsidl nfsio 50519 262072 0 0 3 0x14000 0x280 nfsidl nfsio 22663 427621 0 0 3 0x14000 0x280 nfsidl nfsio 89526 383213 0 0 3 0x14000 0x280 nfsidl nfsio 90659 277110 0 0 3 0x14000 0x280 nfsidl nfsio 93089 6593 0 0 3 0x14000 0x280 nfsidl nfsio 7738 392193 0 0 3 0x14000 0x280 nfsidl nfsio 96986 239422 0 0 3 0x14000 0x280 nfsidl nfsio 65988 241587 72898 0 3 0x2 0x80 wait syz-executor 72898 186181 18536 0 3 0x100002 0x88 sigsusp ksh 18536 277561 46370 0 3 0x10 0x88 kqread sshd-session 46370 43065 35846 0 3 0x12 0x80 kqread sshd-session 74240 246373 1 0 3 0x100003 0x80 ttyin getty 35846 296238 1 0 3 0 0x88 kqread sshd 87718 406185 25280 73 3 0x1100010 0x80 kqread syslogd 25280 194826 1 0 3 0x100002 0x80 sbwait syslogd 86644 29034 1 0 3 0x100000 0x80 kqread resolvd 62380 5531 17898 77 3 0x100012 0x80 kqread dhcpleased 6548 54604 17898 77 3 0x100012 0x80 kqread dhcpleased 17898 146048 1 0 3 0 0x80 kqread dhcpleased 61047 474102 0 0 3 0x14000 0x200 bored smr 32238 117384 0 0 2 0x14000 0x200 zerothread 70793 471546 0 0 3 0x14000 0x200 aiodoned aiodoned 709 518218 0 0 3 0x14000 0x200 syncer update 4966 165008 0 0 3 0x14000 0x200 cleaner cleaner 99522 516227 0 0 3 0x14000 0x200 reaper reaper 79989 215750 0 0 3 0x14000 0x200 pgdaemon pagedaemon 67996 485457 0 0 3 0x14000 0x200 bored viomb 97438 353074 0 0 3 0x14000 0x40000200 acpi0 acpi0 8422 361009 0 0 3 0x14000 0x200 bored softnet0 68122 47667 0 0 3 0x14000 0x200 smrbar systqmp 53889 490195 0 0 3 0x14000 0x200 bored systq 77834 122939 0 0 3 0x14000 0x40000200 tmoslp softclock 61638 85454 0 0 3 0x14000 0x40000200 idle0 1 236947 0 0 3 0x2 0x80 wait init 0 0 -1 0 3 0x10000 0x200 scheduler swapper ddb> show all locks No such command ddb> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 11079 12105K 12770K 166960K 12793 0 pcb 17 13K 14K 166960K 107 0 rtable 186 6K 8K 166960K 2241 0 pf 28 13K 19K 166960K 186 0 ifaddr 33 6K 8K 166960K 307 0 ifgroup 38 1K 2K 166960K 319 0 sysctl 1 1K 9K 166960K 72 0 counters 30 17K 18K 166960K 106 0 ioctlops 0 0K 4K 166960K 159 0 iov 0 0K 16K 166960K 194 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1422 89K 90K 166960K 2410 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 9K 166960K 12 0 VM map 2 1K 1K 166960K 2 0 sem 27 1K 1K 166960K 92 0 dirhash 15 2K 2K 166960K 15 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 11 31K 93K 166960K 1378 0 sigio 0 0K 0K 166960K 5 0 proc 59 59K 116K 166960K 2284 0 subproc 54 3K 4K 166960K 640 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 24 0 in_multi 66 4K 6K 166960K 790 0 ether_multi 1 0K 0K 166960K 6 0 mrt 0 0K 0K 166960K 32 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 409 1818K 1818K 166960K 409 0 exec 0 0K 1K 166960K 1224 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 162 141K 169K 166960K 10892 0 UVM aobj 13 2K 3K 166960K 14 0 pinsyscall 32 64K 94K 166960K 4098 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 4 0 NDP 8 0K 2K 166960K 222 0 temp 48 9111K 9246K 166960K 15848 0 kqueue 13 20K 26K 166960K 75 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 120 242 0 239 3 0 3 3 0 8 2 rtentry 136 796 0 716 4 0 4 4 0 8 0 unpcb 144 227 0 212 4 0 4 4 0 8 3 syncache 336 11 0 11 1 0 1 1 0 8 1 tcpqe 32 10 0 10 1 0 1 1 0 8 1 tcpcb 736 124 0 110 5 0 5 5 0 8 3 arp 96 142 0 130 1 0 1 1 0 8 0 ipq 40 4 0 0 1 0 1 1 0 8 0 ipqe 40 14 0 7 1 0 1 1 0 8 0 inpcb 328 624 0 607 5 0 5 5 0 8 3 ip6q 80 2 0 1 1 0 1 1 0 8 0 ip6af 40 4 0 3 1 0 1 1 0 8 0 nd6 112 212 0 197 1 0 1 1 0 8 0 pkpcb 40 1 0 1 1 0 1 1 0 8 1 kcovpl 48 71 0 65 1 0 1 1 0 8 0 ppxss 1072 10 0 10 1 0 1 1 0 8 1 pfstscr 40 2 0 0 1 0 1 1 0 8 0 pfsrclim 320 1 0 0 1 0 1 1 0 8 0 pftag 88 2 0 0 1 0 1 1 0 8 0 pfstitem 24 4 0 2 1 0 1 1 0 8 0 pfstkey 128 6 0 3 1 0 1 1 0 8 0 pfstate 384 3 0 1 1 0 1 1 0 8 0 pfrule 1360 14 0 13 1 0 1 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 3227 0 2850 34 4 30 32 0 8 4 art_table 40 3228 0 2850 6 0 6 6 0 8 0 art_node 32 795 0 725 1 0 1 1 0 8 0 sysvmsgpl 40 5 0 4 1 0 1 1 0 8 0 semupl 112 3 0 3 1 0 1 1 0 8 1 semapl 72 89 0 64 1 0 1 1 0 8 0 shmpl 120 11 0 1 1 0 1 1 0 8 0 dirhash 1024 19 0 0 3 0 3 3 0 8 0 dino2pl 256 2174 0 554 102 0 102 102 0 8 0 ffsino 256 2174 0 554 102 0 102 102 0 8 0 nchpl 144 2788 0 836 73 0 73 73 0 8 0 rtmask 32 1 0 1 1 0 1 1 0 8 1 vnodes 216 3194 0 0 178 0 178 178 0 8 0 namei 1024 18279 0 18278 3 0 3 3 0 8 2 acpiwqpl 32 1 0 1 1 0 1 1 1 8 1 kstatmem 264 165 0 148 2 0 2 2 0 8 0 scxspl 216 14285 0 14285 8 0 8 8 1 8 8 plimitpl 152 206 0 190 1 0 1 1 0 8 0 sigapl 424 1567 0 1511 8 0 8 8 0 8 0 knotepl 120 13156 0 13109 10 0 10 10 0 8 7 kqueuepl 184 190 0 181 6 0 6 6 0 8 5 pipepl 304 357 0 330 3 0 3 3 0 8 0 fdescpl 448 1534 0 1511 5 0 5 5 0 8 1 filepl 120 6459 0 6279 13 0 13 13 0 8 5 lockfpl 104 101 0 99 1 0 1 1 0 8 0 lockfspl 48 45 0 43 1 0 1 1 0 8 0 sessionpl 144 130 0 122 1 0 1 1 0 8 0 pgrppl 48 205 0 189 1 0 1 1 0 8 0 ucredpl 104 1309 0 1298 1 0 1 1 0 8 0 zombiepl 144 1514 0 1511 1 0 1 1 0 8 0 processpl 1160 1567 0 1511 5 0 5 5 0 8 0 procpl 664 2222 0 2165 8 0 8 8 0 8 1 sosppl 176 2 0 2 1 0 1 1 0 8 1 sockpl 552 1106 0 1071 8 0 8 8 0 8 5 mcl64k 65536 8 0 7 1 0 1 1 0 8 0 mcl16k 16384 7 0 7 1 0 1 1 0 8 1 mcl8k 8192 10 0 10 1 0 1 1 0 8 1 mcl4k 4096 2886 0 2831 14 0 14 14 0 8 6 mcl2k2 2112 2 0 2 1 0 1 1 0 8 1 mcl2k 2048 1505 0 1503 1 0 1 1 0 8 0 mextrefs 64 280 0 280 1 0 1 1 0 8 1 mtagpl 96 4 0 4 1 0 1 1 0 8 1 mbufpl 256 12476 0 12359 17 0 17 17 0 8 5 bufpl 272 7994 0 1778 415 0 415 415 0 8 0 anonpl 24 189134 0 186505 47 0 47 47 0 187 18 amapchunkpl 152 30821 0 30534 29 0 29 29 0 158 16 amappl16 200 2221 0 2209 11 1 10 11 0 8 8 amappl15 192 2 0 2 1 0 1 1 0 8 1 amappl14 184 1157 0 1156 1 0 1 1 0 8 0 amappl13 176 240 0 230 1 0 1 1 0 8 0 amappl12 168 2021 0 2001 2 0 2 2 0 8 0 amappl11 160 94 0 94 1 0 1 1 0 8 1 amappl10 152 54 0 44 1 0 1 1 0 8 0 amappl9 144 268 0 268 1 0 1 1 0 8 1 amappl8 136 344 0 342 1 0 1 1 0 8 0 amappl7 128 266 0 255 1 0 1 1 0 8 0 amappl6 120 770 0 769 1 0 1 1 0 8 0 amappl5 112 102 0 94 1 0 1 1 0 8 0 amappl4 104 445 0 429 1 0 1 1 0 8 0 amappl3 96 5635 0 5582 3 0 3 3 0 8 0 amappl2 88 1410 0 1346 2 0 2 2 0 8 0 amappl1 80 19356 0 18837 13 0 13 13 0 8 1 amappl 88 9121 0 9020 5 0 5 5 0 92 0 uvmvnodes 80 109 0 0 3 0 3 3 0 8 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 128 254 0 254 1 0 1 1 0 8 1 dma64 64 7 0 7 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 13 0 1 1 0 1 1 0 8 0 uaddrrnd 24 1534 0 1511 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1534 0 1511 1 0 1 1 0 8 0 vmmpekpl 168 13437 0 13386 3 0 3 3 0 8 0 vmmpepl 168 106493 0 105098 86 0 86 86 0 357 16 vmsppl 368 1533 0 1511 4 0 4 4 0 8 1 rwobjpl 40 31348 0 30483 12 0 12 12 0 8 0 pdppl 4096 3075 0 3022 151 84 67 81 0 8 14 pvpl 32 561711 0 554809 104 0 104 104 0 265 29 pmappl 216 1533 0 1511 3 0 3 3 0 8 1 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 865 0 88 23 0 23 23 0 8 0 ddb> machine ddbcpu 0 No such command ddb> trace ufsdirhash_lookup(fffffd8070ae6f00,ffff80003b0f4402,10,fffffd8070ae6fbc,ffff80003c92ad10,0) at ufsdirhash_lookup+0x53d sys/ufs/ufs/ufs_dirhash.c:391 ufs_lookup() at ufs_lookup+0xf66 sys/ufs/ufs/ufs_lookup.c:214 VOP_LOOKUP(fffffd8070ae4898,ffff80003c92b058,ffff80003c92b088) at VOP_LOOKUP+0x6e sys/kern/vfs_vops.c:85 vfs_lookup(ffff80003c92b028) at vfs_lookup+0x9ca sys/kern/vfs_lookup.c:585 namei(ffff80003c92b028) at namei+0x7bf sys/kern/vfs_lookup.c:250 dofchmodat(ffff80003c900fb0,ffffff9c,70ad71a810e0,1ff,0) at dofchmodat+0x162 sys/kern/vfs_syscalls.c:2325 syscall(ffff80003c92b210) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80003c92b210) at syscall+0x962 sys/arch/amd64/amd64/trap.c:791 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x70ad71a81110, count: -8 ddb> machine ddbcpu 1 No such command ddb> trace ufsdirhash_lookup(fffffd8070ae6f00,ffff80003b0f4402,10,fffffd8070ae6fbc,ffff80003c92ad10,0) at ufsdirhash_lookup+0x53d sys/ufs/ufs/ufs_dirhash.c:391 ufs_lookup() at ufs_lookup+0xf66 sys/ufs/ufs/ufs_lookup.c:214 VOP_LOOKUP(fffffd8070ae4898,ffff80003c92b058,ffff80003c92b088) at VOP_LOOKUP+0x6e sys/kern/vfs_vops.c:85 vfs_lookup(ffff80003c92b028) at vfs_lookup+0x9ca sys/kern/vfs_lookup.c:585 namei(ffff80003c92b028) at namei+0x7bf sys/kern/vfs_lookup.c:250 dofchmodat(ffff80003c900fb0,ffffff9c,70ad71a810e0,1ff,0) at dofchmodat+0x162 sys/kern/vfs_syscalls.c:2325 syscall(ffff80003c92b210) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80003c92b210) at syscall+0x962 sys/arch/amd64/amd64/trap.c:791 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x70ad71a81110, count: -8