uvm_fault(0xffffffff835e7fb8, 0xffff800026c02004, 0, 1) -> d kernel: page fault trap, code=0 Stopped at ufs_lookup+0x5e1: movzwl 0x4(%r15,%rbx,1),%r14d TID PID UID PRFLAGS PFLAGS CPU COMMAND *323425 10728 60928 0x10 0x4000000 0 syz-executor 265439 37374 0 0x2 0x1 1 syz-executor ufs_lookup() at ufs_lookup+0x5e1 sys/ufs/ufs/ufs_lookup.c:279 VOP_LOOKUP(fffffd805ef47958,ffff80002a51bdc8,ffff80002a51bd68) at VOP_LOOKUP+0x6e sys/kern/vfs_vops.c:85 unveil_find_cover(fffffd805ef47958,ffff8000ffff6cd0) at unveil_find_cover+0x16d sys/kern/kern_unveil.c:277 unveil_start_relative(ffff8000ffff6cd0,ffff80002a51bf38,fffffd805ef47958) at unveil_start_relative+0x14b sys/kern/kern_unveil.c:606 namei(ffff80002a51bf38) at namei+0x54a sys/kern/vfs_lookup.c:222 sys_unveil(ffff8000ffff6cd0,ffff80002a51c120,ffff80002a51c070) at sys_unveil+0x319 sys/kern/vfs_syscalls.c:997 syscall(ffff80002a51c120) at syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a51c120) at syscall+0xb08 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xc922f416dc0, 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(0xffffffff835e7fb8, 0xffff800026c02004, 0, 1) -> d ddb{0}> trace ufs_lookup() at ufs_lookup+0x5e1 sys/ufs/ufs/ufs_lookup.c:279 VOP_LOOKUP(fffffd805ef47958,ffff80002a51bdc8,ffff80002a51bd68) at VOP_LOOKUP+0x6e sys/kern/vfs_vops.c:85 unveil_find_cover(fffffd805ef47958,ffff8000ffff6cd0) at unveil_find_cover+0x16d sys/kern/kern_unveil.c:277 unveil_start_relative(ffff8000ffff6cd0,ffff80002a51bf38,fffffd805ef47958) at unveil_start_relative+0x14b sys/kern/kern_unveil.c:606 namei(ffff80002a51bf38) at namei+0x54a sys/kern/vfs_lookup.c:222 sys_unveil(ffff8000ffff6cd0,ffff80002a51c120,ffff80002a51c070) at sys_unveil+0x319 sys/kern/vfs_syscalls.c:997 syscall(ffff80002a51c120) at syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a51c120) at syscall+0xb08 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xc922f416dc0, count: -8 ddb{0}> show registers rdi 0 rsi 0 rbp 0xffff80002a51bce0 rbx 0 rdx 0xffff80000128c8c0 rcx 0xffffffff rax 0xfffffd805e676158 r8 0xffffffffffffffff r9 0xfffffd807f7d3340 r10 0x1fe8a627fc304931 r11 0xc671342efe0e787c r12 0 r13 0xfffffd806de3f358 r14 0 r15 0xffff800026c02000 rip 0xffffffff810e3a61 ufs_lookup+0x5e1 cs 0x8 rflags 0x10202 __ALIGN_SIZE+0xf202 rsp 0xffff80002a51bbd0 ss 0x10 ufs_lookup+0x5e1: movzwl 0x4(%r15,%rbx,1),%r14d ddb{0}> show proc PROC (syz-executor) tid=323425 pid=10728 tcnt=2 stat=onproc flags process=10 proc=4000000 runpri=32, usrpri=86, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff8000ffff71e0,0xffff8000ffff7c10 process=0xffff80003c62fdb8 user=0xffff80002a517000, vmspace=0xfffffd8076070200 estcpu=36, cpticks=1, pctcpu=0.0, user=0, sys=1, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 29853 82013 29591 0 2 0 syz-executor 29853 129319 29591 0 3 0x4000080 kqsel syz-executor 5841 113263 28540 0 2 0 syz-executor 5841 105671 28540 0 3 0x4000080 fsleep syz-executor 10728 489248 52755 60928 2 0x10 syz-executor *10728 323425 52755 60928 7 0x4000010 syz-executor 92476 385909 32663 0 2 0 syz-executor 92476 290897 32663 0 3 0x4000080 kqsel syz-executor 73188 237754 37374 0 3 0x80 nanoslp syz-executor 73188 430412 37374 0 3 0x4000080 kqpoll syz-executor 73188 108316 37374 0 3 0x4000080 fsleep syz-executor 73188 174800 37374 0 3 0x4000080 fsleep syz-executor 2548 170396 97944 0 2 0 syz-executor 2548 372191 97944 0 3 0x4000080 lockf syz-executor 2548 322728 97944 0 3 0x4000080 fsleep syz-executor 97944 292170 49172 0 2 0x482 syz-executor 32061 17228 1 0 3 0x100083 ttyin getty 29591 454170 49172 0 2 0x482 syz-executor 28540 195691 49172 0 3 0x82 nanoslp syz-executor 88362 291694 0 0 3 0x14280 nfsidl nfsio 63954 485938 0 0 3 0x14280 nfsidl nfsio 60697 437149 0 0 3 0x14280 nfsidl nfsio 85928 73883 0 0 3 0x14280 nfsidl nfsio 76397 406921 0 0 3 0x14280 nfsidl nfsio 57593 362630 0 0 3 0x14280 nfsidl nfsio 70097 122565 0 0 3 0x14280 nfsidl nfsio 99008 387348 0 0 3 0x14280 nfsidl nfsio 83810 192694 0 0 3 0x14280 nfsidl nfsio 30841 433869 0 0 3 0x14280 nfsidl nfsio 91856 160817 0 0 3 0x14280 nfsidl nfsio 60444 48961 0 0 3 0x14280 nfsidl nfsio 52953 369811 0 0 3 0x14280 nfsidl nfsio 1018 429702 0 0 3 0x14280 nfsidl nfsio 68763 75331 0 0 3 0x14280 nfsidl nfsio 85537 64651 0 0 3 0x14280 nfsidl nfsio 84603 401319 0 0 3 0x14280 nfsidl nfsio 33063 103152 0 0 3 0x14280 nfsidl nfsio 83046 310901 0 0 3 0x14280 nfsidl nfsio 80441 214515 0 0 3 0x14280 nfsidl nfsio 72815 189659 0 0 3 0x14200 bored sosplice 37374 265439 49172 0 7 0x3 syz-executor 52755 326170 49172 0 3 0x82 nanoslp syz-executor 32663 84584 49172 0 3 0x82 nanoslp syz-executor 2388 436433 49172 0 2 0x2 syz-executor 91076 97033 49172 0 3 0x82 wait syz-executor 49172 484703 12546 0 2 0x2 syz-executor 12546 306938 67542 0 3 0x10008a sigsusp ksh 67542 60446 4450 0 3 0x98 kqread sshd-session 4450 480090 51233 0 3 0x92 kqread sshd-session 51233 314384 1 0 3 0x88 kqread sshd 11152 158663 66629 74 3 0x1100092 bpf pflogd 66629 160696 1 0 3 0x80 sbwait pflogd 25276 437421 36718 73 3 0x1100090 kqread syslogd 36718 185467 1 0 3 0x100082 sbwait syslogd 23587 515231 1 0 3 0x100080 kqread resolvd 55111 318294 12738 77 3 0x100092 kqread dhcpleased 56894 1094 12738 77 3 0x100092 kqread dhcpleased 12738 248698 1 0 3 0x80 kqread dhcpleased 52643 489266 0 0 3 0x14200 bored smr 57022 248008 0 0 2 0x14200 zerothread 60993 180745 0 0 3 0x14200 aiodoned aiodoned 75196 419593 0 0 3 0x14200 syncer update 98430 417276 0 0 3 0x14200 cleaner cleaner 7850 10884 0 0 3 0x14200 reaper reaper 85203 143738 0 0 3 0x14200 pgdaemon pagedaemon 58200 12572 0 0 3 0x14200 bored viomb 60573 42951 0 0 3 0x40014200 acpi0 acpi0 25317 413579 0 0 3 0x40014200 idle1 11188 107940 0 0 3 0x14200 bored softnet3 2505 156163 0 0 3 0x14200 bored softnet2 89801 483505 0 0 3 0x14200 bored softnet1 37918 388695 0 0 3 0x14200 bored softnet0 31950 177838 0 0 3 0x14200 bored systqmp 84171 152713 0 0 3 0x14200 bored systq 95485 365115 0 0 3 0x14200 tmoslp softclockmp 33012 288581 0 0 2 0x40014200 softclock 94637 325647 0 0 3 0x40014200 idle0 1 83270 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 10728 (syz-executor) thread 0xffff8000ffff6cd0 (323425) ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10258 11274K 12538K 166960K 16942 0 pcb 18 16K 18K 166960K 627 0 rtable 202 7K 8K 166960K 711 0 pf 41 19K 20K 166960K 156 0 ifaddr 40 7K 7K 166960K 114 0 ifgroup 62 2K 2K 166960K 192 0 sysctl 4 1K 1K 166960K 6 0 counters 66 36K 37K 166960K 142 0 ioctlops 0 0K 4K 166960K 1872 0 iov 0 0K 36K 166960K 176 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1512 95K 95K 166960K 4495 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 10K 14K 166960K 46 0 VM map 2 1K 1K 166960K 2 0 sem 25 11K 16K 166960K 51 0 dirhash 12 2K 2K 166960K 69 0 ACPI 1690 195K 286K 166960K 12468 0 file desc 17 61K 89K 166960K 2807 0 sigio 0 0K 0K 166960K 39 0 proc 74 103K 127K 166960K 943 0 subproc 72 4K 4K 166960K 118 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 453 0 in_multi 81 6K 7K 166960K 220 0 ether_multi 1 0K 0K 166960K 27 0 mrt 1 0K 0K 166960K 9 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 271 1208K 1208K 166960K 271 0 exec 0 0K 1K 166960K 961 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 4K 166960K 4 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 242 74K 87K 166960K 27638 0 UVM aobj 113 7K 7K 166960K 118 0 pinsyscall 42 84K 104K 166960K 4019 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 258 0 NDP 13 0K 2K 166960K 80 0 temp 82 6900K 7156K 166960K 125754 0 kqueue 14 22K 30K 166960K 430 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 24 0 0 1 0 1 1 0 8 0 rtpcb 120 298 0 294 2 1 1 2 0 8 0 rtentry 112 221 0 132 4 0 4 4 0 8 0 unpcb 144 1997 0 1976 12 8 4 6 0 8 3 syncache 336 3 0 3 1 1 0 1 0 8 0 sackhl 24 32 0 32 5 4 1 1 0 8 1 tcpcb 808 775 0 770 12 11 1 8 0 8 0 arp 120 41 0 25 1 0 1 1 0 8 0 inpcb 376 3178 0 3166 28 20 8 12 0 8 6 nd6 136 48 0 22 1 0 1 1 0 8 0 pkpcb 40 22 0 21 6 5 1 1 0 8 0 kcovpl 48 13 0 5 1 0 1 1 0 8 0 ppxss 1168 17 0 17 3 2 1 1 0 8 1 pfstscr 40 6 0 4 3 2 1 1 0 8 0 pffrag 232 19 0 11 1 0 1 1 0 482 0 pffrnode 88 17 0 9 1 0 1 1 0 8 0 pffrent 40 113 0 105 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 pftag 88 1 0 0 1 0 1 1 0 8 0 pfstitem 24 200 0 86 1 0 1 1 0 8 0 pfstkey 128 208 0 94 4 0 4 4 0 8 0 pfstate 376 200 0 90 12 0 12 12 0 8 1 pfrule 1344 69 0 63 2 1 1 2 0 8 0 art_heap8 4096 3 0 0 3 0 3 3 0 8 0 art_heap4 256 833 0 470 33 10 23 29 0 8 0 art_table 32 836 0 470 4 0 4 4 0 8 0 art_node 16 209 0 134 1 0 1 1 0 8 0 sysvmsgpl 40 21 0 12 1 0 1 1 0 8 0 semupl 112 2 0 2 2 2 0 1 0 8 0 semapl 112 43 0 20 1 0 1 1 0 8 0 shmpl 112 115 0 5 4 0 4 4 0 8 0 dirhash 1024 56 0 39 3 0 3 3 0 8 0 dino2pl 256 6688 0 5177 96 0 96 96 0 8 0 ffsino 280 6688 0 5177 109 0 109 109 0 8 0 nchpl 144 10781 0 10217 63 38 25 63 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 39425 0 39423 3 1 2 2 0 8 1 percpumem 16 85 0 38 1 0 1 1 0 8 0 kstatmem 264 102 0 76 4 1 3 3 0 8 1 acpiwqpl 32 1 0 1 1 0 1 1 1 8 1 scsiplug 72 11 0 11 6 5 1 1 0 8 1 scxspl 216 31712 0 31712 16 13 3 8 1 8 3 plimitpl 152 452 0 434 1 0 1 1 0 8 0 sigapl 424 3122 0 3052 11 2 9 9 0 8 0 futexpl 64 44187 0 44183 1 0 1 1 0 8 0 knotepl 120 616 0 0 17 0 17 17 0 8 0 kqueuepl 216 750 0 737 7 5 2 3 0 8 1 pipepl 328 492 0 465 16 11 5 8 0 8 2 fdescpl 504 3078 0 3047 5 0 5 5 0 8 0 filepl 152 22393 0 22159 32 19 13 18 0 8 2 lockfpl 104 1442 0 1437 3 2 1 2 0 8 0 lockfspl 48 454 0 451 1 0 1 1 0 8 0 sessionpl 144 28 0 19 1 0 1 1 0 8 0 pgrppl 48 62 0 45 1 0 1 1 0 8 0 ucredpl 104 4240 0 4224 1 0 1 1 0 8 0 zombiepl 144 3053 0 3052 1 0 1 1 0 8 0 processpl 1168 3122 0 3052 7 1 6 6 0 8 0 procpl 648 7505 0 7426 9 1 8 8 0 8 0 srpgc 96 12 0 12 3 2 1 1 0 8 1 sosppl 168 17 0 17 5 4 1 1 0 8 1 sockpl 688 5550 0 5513 37 27 10 16 0 8 6 mcl64k 65536 5 0 0 1 0 1 1 0 8 0 mcl16k 16384 2 0 0 1 0 1 1 0 8 0 mcl12k 12288 2 0 0 1 0 1 1 0 8 0 mcl9k 9216 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 6 0 0 1 0 1 1 0 8 0 mcl4k 4096 133 0 0 16 0 16 16 0 8 0 mcl2k2 2112 1 0 0 1 0 1 1 0 8 0 mcl2k 2048 40 0 0 5 0 5 5 0 8 0 mtagpl 96 197 0 0 5 0 5 5 0 8 0 mbufpl 256 388 0 0 24 0 24 24 0 8 0 bufpl 280 10779 0 4613 441 0 441 441 0 8 0 anonpl 24 382664 0 371429 121 32 89 101 0 185 12 amapchunkpl 152 90156 0 89492 39 11 28 32 0 158 0 amappl16 200 8360 0 8002 45 15 30 40 0 8 2 amappl15 192 15 0 15 2 2 0 1 0 8 0 amappl14 184 125 0 113 1 0 1 1 0 8 0 amappl13 176 32 0 32 1 1 0 1 0 8 0 amappl12 168 3797 0 3766 3 1 2 2 0 8 0 amappl11 160 56 0 42 1 0 1 1 0 8 0 amappl10 152 12 0 12 4 3 1 1 0 8 1 amappl9 144 267 0 266 1 0 1 1 0 8 0 amappl8 136 29 0 26 1 0 1 1 0 8 0 amappl7 128 120 0 107 1 0 1 1 0 8 0 amappl6 120 243 0 239 1 0 1 1 0 8 0 amappl5 112 144 0 134 1 0 1 1 0 8 0 amappl4 104 336 0 318 1 0 1 1 0 8 0 amappl3 96 19017 0 18902 6 2 4 4 0 8 0 amappl2 88 735 0 671 2 0 2 2 0 8 0 amappl1 80 16150 0 15571 14 1 13 14 0 8 0 amappl 88 27019 0 26834 5 0 5 5 0 92 0 dma4096 4096 1 0 1 1 1 0 1 0 8 0 dma1024 1024 2 0 1 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 7 0 7 2 1 1 1 0 8 1 dma32 32 8 0 8 2 2 0 1 0 8 0 dma16 16 20 0 19 1 0 1 1 0 8 0 aobjpl 72 117 0 5 3 0 3 3 0 8 0 uaddrrnd 24 3078 0 3047 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 3078 0 3047 1 0 1 1 0 8 0 vmmpekpl 168 23908 0 23865 4 1 3 3 0 8 0 vmmpepl 168 189472 0 187236 126 17 109 116 0 357 4 vmsppl 456 3077 0 3047 8 3 5 5 0 8 0 rwobjpl 64 52474 0 45152 122 0 122 122 0 8 3 pdppl 4096 6163 0 6094 111 40 71 83 0 8 2 pvpl 32 24982 0 0 203 1 202 202 0 265 0 pmappl 248 3077 0 3047 5 2 3 3 0 8 0 extentpl 40 55 0 38 1 0 1 1 0 8 0 phpool 112 328 0 68 8 0 8 8 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace ufs_lookup() at ufs_lookup+0x5e1 sys/ufs/ufs/ufs_lookup.c:279 VOP_LOOKUP(fffffd805ef47958,ffff80002a51bdc8,ffff80002a51bd68) at VOP_LOOKUP+0x6e sys/kern/vfs_vops.c:85 unveil_find_cover(fffffd805ef47958,ffff8000ffff6cd0) at unveil_find_cover+0x16d sys/kern/kern_unveil.c:277 unveil_start_relative(ffff8000ffff6cd0,ffff80002a51bf38,fffffd805ef47958) at unveil_start_relative+0x14b sys/kern/kern_unveil.c:606 namei(ffff80002a51bf38) at namei+0x54a sys/kern/vfs_lookup.c:222 sys_unveil(ffff8000ffff6cd0,ffff80002a51c120,ffff80002a51c070) at sys_unveil+0x319 sys/kern/vfs_syscalls.c:997 syscall(ffff80002a51c120) at syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a51c120) at syscall+0xb08 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xc922f416dc0, count: -8 ddb{0}> machine ddbcpu 1