uvm_fault(0xffffffff82bcbd30, 0xffff80002042f004, 0, 1) -> d kernel: page fault trap, code=0 Stopped at ufs_lookup+0x4ce: movzwl 0x4(%r15,%r13,1),%ebx TID PID UID PRFLAGS PFLAGS CPU COMMAND * 85930 47242 0 0 0x4000000 0 syz-executor.5 ufs_lookup() at ufs_lookup+0x4ce sys/ufs/ufs/ufs_lookup.c:281 VOP_LOOKUP(fffffd807c0b8dd0,ffff800023164c08,ffff800023164c38) at VOP_LOOKUP+0x58 sys/kern/vfs_vops.c:85 vfs_lookup(ffff800023164bd8) at vfs_lookup+0x6cc sys/kern/vfs_lookup.c:566 namei(ffff800023164bd8) at namei+0x55a sys/kern/vfs_lookup.c:250 vn_open(ffff800023164bd8,212,0) at vn_open+0x188 sys/kern/vfs_vnops.c:107 doopenat(ffff8000216ff340,ffffff9c,20000040,611,0,ffff800023164db0) at doopenat+0x26a sys/kern/vfs_syscalls.c:1127 syscall(ffff800023164e30) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:625 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x2975a3e2da0, 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(0xffffffff82bcbd30, 0xffff80002042f004, 0, 1) -> d ddb> trace ufs_lookup() at ufs_lookup+0x4ce sys/ufs/ufs/ufs_lookup.c:281 VOP_LOOKUP(fffffd807c0b8dd0,ffff800023164c08,ffff800023164c38) at VOP_LOOKUP+0x58 sys/kern/vfs_vops.c:85 vfs_lookup(ffff800023164bd8) at vfs_lookup+0x6cc sys/kern/vfs_lookup.c:566 namei(ffff800023164bd8) at namei+0x55a sys/kern/vfs_lookup.c:250 vn_open(ffff800023164bd8,212,0) at vn_open+0x188 sys/kern/vfs_vnops.c:107 doopenat(ffff8000216ff340,ffffff9c,20000040,611,0,ffff800023164db0) at doopenat+0x26a sys/kern/vfs_syscalls.c:1127 syscall(ffff800023164e30) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:625 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x2975a3e2da0, count: -8 ddb> show registers rdi 0 rsi 0 rbp 0xffff800023164840 rbx 0 rdx 0 rcx 0xffffffff rax 0xfffffd80779b2b60 r8 0xffffffffffffffff r9 0xfffffd807f7d76e8 r10 0x95a4e7a58b1babfc r11 0xb0faed2713cbaf64 r12 0 r13 0 r14 0 r15 0xffff80002042f000 rip 0xffffffff81260e4e ufs_lookup+0x4ce cs 0x8 rflags 0x10202 __ALIGN_SIZE+0xf202 rsp 0xffff800023164740 ss 0x10 ufs_lookup+0x4ce: movzwl 0x4(%r15,%r13,1),%ebx ddb> show proc PROC (syz-executor.5) pid=85930 stat=onproc flags process=0 proc=4000000 pri=32, usrpri=84, nice=20 forw=0xffffffffffffffff, list=0xffff8000216fedd0,0xffff8000216fe870 process=0xffff80002e8d63f0 user=0xffff80002315f000, vmspace=0xfffffd807e9a2ac8 estcpu=34, cpticks=1, pctcpu=0.0 user=0, sys=1, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 47242 368990 56969 0 2 0 syz-executor.5 *47242 85930 56969 0 7 0x4000000 syz-executor.5 47242 412800 56969 0 3 0x4000080 fsleep syz-executor.5 75825 417028 1128 0 2 0 syz-executor.6 75825 343744 1128 0 2 0x4000000 syz-executor.6 71675 315802 39210 0 2 0 syz-executor.4 71675 364622 39210 0 2 0x4000000 syz-executor.4 71675 454025 39210 0 2 0x4000000 syz-executor.4 53262 23429 48190 0 2 0 syz-executor.0 53262 384173 48190 0 3 0x4000080 wsevent_read syz-executor.0 53262 123301 48190 0 3 0x4000080 fsleep syz-executor.0 37354 521856 10867 0 2 0x4081000 syz-executor.1 37354 477246 10867 0 3 0x4003000 suspend syz-executor.1 74850 310409 18128 0 3 0x82 wait syz-executor.3 64712 483951 18128 0 2 0x482 syz-executor.7 92621 139636 18128 0 3 0x82 nanoslp syz-executor.2 39210 379928 18128 0 2 0x482 syz-executor.4 48190 335392 18128 0 2 0x482 syz-executor.0 10867 258936 18128 0 3 0x82 wait syz-executor.1 36838 77799 1 0 3 0x100083 ttyin getty 35447 493455 0 0 3 0x14200 acct acct 54433 499585 0 0 3 0x14280 nfsidl nfsio 45189 108073 0 0 3 0x14280 nfsidl nfsio 44442 301154 0 0 3 0x14280 nfsidl nfsio 74317 243049 0 0 3 0x14280 nfsidl nfsio 31654 41055 0 0 3 0x14280 nfsidl nfsio 74885 418250 0 0 3 0x14280 nfsidl nfsio 32752 93903 0 0 3 0x14280 nfsidl nfsio 50505 460697 0 0 3 0x14280 nfsidl nfsio 21299 133208 0 0 3 0x14280 nfsidl nfsio 36410 414183 0 0 3 0x14280 nfsidl nfsio 32778 211256 0 0 3 0x14280 nfsidl nfsio 14986 341900 0 0 3 0x14280 nfsidl nfsio 90499 45545 0 0 3 0x14280 nfsidl nfsio 97709 12 0 0 3 0x14280 nfsidl nfsio 43169 286787 0 0 3 0x14280 nfsidl nfsio 66381 11045 0 0 3 0x14280 nfsidl nfsio 66843 300611 0 0 3 0x14280 nfsidl nfsio 2136 100972 0 0 3 0x14280 nfsidl nfsio 39859 304071 0 0 3 0x14280 nfsidl nfsio 92165 318227 0 0 3 0x14280 nfsidl nfsio 40571 480675 0 0 3 0x14200 bored sosplice 56969 67940 18128 0 2 0x482 syz-executor.5 1128 138265 18128 0 2 0x482 syz-executor.6 18128 305953 17101 0 3 0x82 thrsleep syz-fuzzer 18128 416388 17101 0 3 0x4000082 nanoslp syz-fuzzer 18128 286412 17101 0 3 0x4000082 kqread syz-fuzzer 18128 487124 17101 0 3 0x4000082 wait syz-fuzzer 18128 119172 17101 0 3 0x4000082 wait syz-fuzzer 18128 201284 17101 0 3 0x4000082 thrsleep syz-fuzzer 18128 262064 17101 0 3 0x4000082 wait syz-fuzzer 18128 329205 17101 0 3 0x4000082 wait syz-fuzzer 18128 409484 17101 0 3 0x4000082 thrsleep syz-fuzzer 18128 106470 17101 0 3 0x4000082 thrsleep syz-fuzzer 18128 314444 17101 0 3 0x4000082 wait syz-fuzzer 18128 6976 17101 0 3 0x4000082 wait syz-fuzzer 18128 229661 17101 0 3 0x4000082 wait syz-fuzzer 18128 169489 17101 0 3 0x4000082 wait syz-fuzzer 17101 168617 38995 0 3 0x10008a sigsusp ksh 38995 490472 52089 0 3 0x9a kqread sshd 52089 77547 1 0 3 0x88 kqread sshd 356 196463 398 73 3 0x1100090 kqread syslogd 398 36719 1 0 3 0x100082 netio syslogd 25820 218521 1 0 3 0x100080 kqread resolvd 64703 477018 49247 77 3 0x100092 kqread dhcpleased 36052 229344 49247 77 3 0x100092 kqread dhcpleased 49247 519125 1 0 3 0x80 kqread dhcpleased 63522 73991 0 0 3 0x14200 bored smr 35904 133511 0 0 2 0x14200 zerothread 30880 190151 0 0 3 0x14200 aiodoned aiodoned 93989 385513 0 0 3 0x14200 syncer update 27930 197847 0 0 3 0x14200 cleaner cleaner 64601 199426 0 0 3 0x14200 reaper reaper 14695 352113 0 0 3 0x14200 pgdaemon pagedaemon 53120 461379 0 0 3 0x14200 bored viomb 83897 108267 0 0 3 0x40014200 acpi0 acpi0 56817 98912 0 0 3 0x14200 bored softnet 10273 9423 0 0 3 0x14200 bored softnet 12905 81593 0 0 3 0x14200 bored softnet 62053 422020 0 0 3 0x14200 bored softnet 447 214075 0 0 3 0x14200 bored systqmp 20792 196888 0 0 3 0x14200 bored systq 74957 208358 0 0 3 0x40014200 bored softclock 19398 151919 0 0 3 0x40014200 idle0 1 356325 0 0 3 0x82 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 10218 6491K 7252K 78643K 26167 0 pcb 13 18K 20K 78643K 916 0 rtable 233 8K 8K 78643K 1370 0 ifaddr 85 23K 23K 78643K 474 0 sysctl 2 0K 0K 78643K 2 0 counters 28 17K 17K 78643K 143 0 ioctlops 0 0K 4K 78643K 663 0 iov 0 0K 28K 78643K 1532 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 4 0 vnodes 1496 94K 94K 78643K 7224 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 5K 78643K 31 0 VM map 2 1K 1K 78643K 2 0 sem 12 0K 0K 78643K 718 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12548 0 file desc 16 57K 69K 78643K 4679 0 sigio 0 0K 0K 78643K 35 0 proc 59 59K 83K 78643K 1248 0 subproc 104 6K 6K 78643K 364 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 362 0 in_multi 103 6K 6K 78643K 421 0 ether_multi 1 0K 0K 78643K 24 0 mrt 1 0K 0K 78643K 30 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 169 758K 758K 78643K 169 0 exec 0 0K 1K 78643K 1121 0 tdb 3 0K 0K 78643K 3 0 pagedep 1 8K 8K 78643K 1 0 inodedep 1 32K 32K 78643K 1 0 newblk 1 0K 0K 78643K 1 0 VM swap 8 62K 64K 78643K 10 0 UVM amap 314 87K 98K 78643K 31383 0 UVM aobj 131 4K 4K 78643K 137 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 197 0 NDP 13 0K 2K 78643K 152 0 temp 135 5770K 6795K 78643K 64459 0 kqueue 12 18K 24K 78643K 357 0 SYN cache 2 16K 16K 78643K 2 0 ddb> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle rtpcb 120 637 0 634 9 6 3 3 0 8 2 rtentry 112 408 0 303 4 1 3 4 0 8 0 unpcb 144 5163 0 5150 36 35 1 6 0 8 0 syncache 296 35 0 35 6 6 0 1 0 8 0 tcpqe 32 53 0 53 4 4 0 1 0 8 0 tcpcb 776 1586 0 1582 51 50 1 14 0 8 0 arp 88 59 0 40 1 0 1 1 0 8 0 ipq 40 4 0 4 1 1 0 1 0 8 0 ipqe 40 16 0 16 1 1 0 1 0 8 0 inpcb 336 4312 0 4302 53 51 2 12 0 8 1 nd6 48 92 0 67 1 0 1 1 0 8 0 pkpcb 40 14 0 14 4 4 0 1 0 8 0 kcovpl 48 28 0 20 1 0 1 1 0 8 0 mppekey 1024 9 0 9 2 2 0 1 0 8 0 ppxss 1160 46 0 46 6 6 0 1 0 8 0 pppxif 1360 32 0 32 6 6 0 1 0 8 0 pfstscr 40 7 0 5 1 0 1 1 0 8 0 pfosfp 40 7 0 5 1 0 1 1 0 8 0 pfosfpen 112 7 0 2 1 0 1 1 0 8 0 pfanchor 1280 756 0 252 42 0 42 42 0 8 0 pfqueue 264 2 0 2 1 1 0 1 0 8 0 pfstitem 24 8 0 4 1 0 1 1 0 8 0 pfstkey 128 14 0 10 1 0 1 1 0 8 0 pfstate 352 7 0 5 1 0 1 1 0 8 0 rttmr 136 6 0 6 1 1 0 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 1849 0 1398 43 14 29 29 0 8 0 art_table 32 1850 0 1398 4 0 4 4 0 8 0 art_node 16 407 0 315 1 0 1 1 0 8 0 sysvmsgpl 40 37 0 14 1 0 1 1 0 8 0 semapl 112 716 0 706 1 0 1 1 0 8 0 shmpl 112 134 0 6 4 0 4 4 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 7684 0 6251 90 0 90 90 0 8 0 ffsino 240 7684 0 6251 85 0 85 85 0 8 0 nchpl 144 14158 0 12527 63 0 63 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 55433 0 55432 2 1 1 2 0 8 0 vmpool 664 16 0 16 2 2 0 1 0 8 0 kstatmem 264 184 0 158 2 0 2 2 0 8 0 scsiplug 72 3 0 3 1 1 0 1 0 8 0 scxspl 216 39834 0 39834 14 13 1 8 0 8 1 plimitpl 152 597 0 582 1 0 1 1 0 8 0 sigapl 424 5019 0 4952 8 0 8 8 0 8 0 futexpl 64 53729 0 53727 1 0 1 1 0 8 0 knotepl 120 51271 0 51191 16 9 7 7 0 8 3 kqueuepl 184 4532 0 4522 36 35 1 10 0 8 0 pipepl 288 1419 0 1391 25 22 3 7 0 8 0 fdescpl 432 4921 0 4894 4 0 4 4 0 8 0 filepl 120 42204 0 41961 59 49 10 20 0 8 1 lockfpl 104 2556 0 2554 4 3 1 2 0 8 0 lockfspl 48 876 0 874 1 0 1 1 0 8 0 sessionpl 144 45 0 29 1 0 1 1 0 8 0 pgrppl 48 134 0 118 1 0 1 1 0 8 0 ucredpl 104 3905 0 3894 1 0 1 1 0 8 0 zombiepl 144 4956 0 4952 1 0 1 1 0 8 0 processpl 1008 5019 0 4952 10 1 9 9 0 8 0 procpl 696 11768 0 11679 13 4 9 10 0 8 0 sosppl 168 17 0 17 4 4 0 1 0 8 0 sockpl 456 10129 0 10106 210 199 11 21 0 8 8 mcl64k 65536 256 0 256 10 9 1 1 0 8 1 mcl16k 16384 69 0 69 9 9 0 1 0 8 0 mcl12k 12288 153 0 153 6 5 1 1 0 8 1 mcl9k 9216 24 0 24 9 8 1 1 0 8 1 mcl8k 8192 329 0 329 7 6 1 1 0 8 1 mcl4k 4096 532 0 532 5 4 1 1 0 8 1 mcl2k2 2112 82 0 82 9 9 0 1 0 8 0 mcl2k 2048 84616 0 84539 39 28 11 30 0 8 0 mtagpl 96 1356 0 865 19 7 12 12 0 8 0 mbufpl 256 177455 0 176725 174 127 47 83 0 8 0 bufpl 288 10982 0 4585 458 0 458 458 0 8 0 anonpl 24 940826 0 925108 144 33 111 133 0 188 0 amapchunkpl 152 87613 0 86903 43 10 33 37 0 158 0 amappl16 200 9500 0 8933 61 30 31 43 0 8 0 amappl15 192 43 0 41 1 0 1 1 0 8 0 amappl14 184 226 0 214 2 1 1 2 0 8 0 amappl13 176 7 0 7 1 1 0 1 0 8 0 amappl12 168 662 0 658 1 0 1 1 0 8 0 amappl11 160 42 0 32 1 0 1 1 0 8 0 amappl10 152 52 0 41 1 0 1 1 0 8 0 amappl9 144 995 0 994 1 0 1 1 0 8 0 amappl8 136 292 0 215 3 0 3 3 0 8 0 amappl7 128 190 0 165 2 0 2 2 0 8 0 amappl6 120 267 0 254 2 1 1 2 0 8 0 amappl5 112 245 0 239 1 0 1 1 0 8 0 amappl4 104 733 0 703 2 1 1 2 0 8 0 amappl3 96 13335 0 13280 2 0 2 2 0 8 0 amappl2 88 5507 0 5436 3 1 2 3 0 8 0 amappl1 80 110840 0 110098 33 16 17 26 0 8 0 amappl 88 30194 0 30006 5 0 5 5 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 72 136 0 6 3 0 3 3 0 8 0 uaddrrnd 24 4937 0 4910 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 4937 0 4910 1 0 1 1 0 8 0 vmmpekpl 168 40591 0 40536 3 0 3 3 0 8 0 vmmpepl 168 457959 0 455180 258 100 158 159 0 357 31 vmsppl 344 4936 0 4910 3 0 3 3 0 8 0 rwobjpl 24 121014 0 113237 49 1 48 49 0 8 0 pdppl 4096 9880 0 9820 318 254 64 66 0 8 4 pvpl 32 1902642 0 1881456 372 181 191 361 0 265 0 pmappl 216 4936 0 4910 2 0 2 2 0 8 0 extentpl 40 56 0 38 1 0 1 1 0 8 0 phpool 112 1333 0 535 24 0 24 24 0 8 0 ddb> machine ddbcpu 0 No such command ddb> trace ufs_lookup() at ufs_lookup+0x4ce sys/ufs/ufs/ufs_lookup.c:281 VOP_LOOKUP(fffffd807c0b8dd0,ffff800023164c08,ffff800023164c38) at VOP_LOOKUP+0x58 sys/kern/vfs_vops.c:85 vfs_lookup(ffff800023164bd8) at vfs_lookup+0x6cc sys/kern/vfs_lookup.c:566 namei(ffff800023164bd8) at namei+0x55a sys/kern/vfs_lookup.c:250 vn_open(ffff800023164bd8,212,0) at vn_open+0x188 sys/kern/vfs_vnops.c:107 doopenat(ffff8000216ff340,ffffff9c,20000040,611,0,ffff800023164db0) at doopenat+0x26a sys/kern/vfs_syscalls.c:1127 syscall(ffff800023164e30) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:625 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x2975a3e2da0, count: -8 ddb> machine ddbcpu 1 No such command ddb> trace ufs_lookup() at ufs_lookup+0x4ce sys/ufs/ufs/ufs_lookup.c:281 VOP_LOOKUP(fffffd807c0b8dd0,ffff800023164c08,ffff800023164c38) at VOP_LOOKUP+0x58 sys/kern/vfs_vops.c:85 vfs_lookup(ffff800023164bd8) at vfs_lookup+0x6cc sys/kern/vfs_lookup.c:566 namei(ffff800023164bd8) at namei+0x55a sys/kern/vfs_lookup.c:250 vn_open(ffff800023164bd8,212,0) at vn_open+0x188 sys/kern/vfs_vnops.c:107 doopenat(ffff8000216ff340,ffffff9c,20000040,611,0,ffff800023164db0) at doopenat+0x26a sys/kern/vfs_syscalls.c:1127 syscall(ffff800023164e30) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:625 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x2975a3e2da0, count: -8