uvm_fault(0xffffffff82b8f7e8, 0xffff80001a5bf004, 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 *394047 90888 0 0 0x4000000 0K syz-executor.0 ufs_lookup() at ufs_lookup+0x4ce sys/ufs/ufs/ufs_lookup.c:281 VOP_LOOKUP(fffffd806a8482c8,ffff80002c901118,ffff80002c901148) at VOP_LOOKUP+0x58 sys/kern/vfs_vops.c:85 vfs_lookup(ffff80002c9010e8) at vfs_lookup+0x6e5 sys/kern/vfs_lookup.c:560 namei(ffff80002c9010e8) at namei+0x36a sys/kern/vfs_lookup.c:244 vn_open(ffff80002c9010e8,243,0) at vn_open+0x188 sys/kern/vfs_vnops.c:107 doopenat(ffff80002b078540,ffffff9c,20001240,242,0,ffff80002c9012c0) at doopenat+0x26a sys/kern/vfs_syscalls.c:1127 syscall(ffff80002c901340) at syscall+0x435 mi_syscall sys/sys/syscall_mi.h:101 [inline] syscall(ffff80002c901340) at syscall+0x435 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xcdae417f30, 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(0xffffffff82b8f7e8, 0xffff80001a5bf004, 0, 1) -> d ddb{0}> trace ufs_lookup() at ufs_lookup+0x4ce sys/ufs/ufs/ufs_lookup.c:281 VOP_LOOKUP(fffffd806a8482c8,ffff80002c901118,ffff80002c901148) at VOP_LOOKUP+0x58 sys/kern/vfs_vops.c:85 vfs_lookup(ffff80002c9010e8) at vfs_lookup+0x6e5 sys/kern/vfs_lookup.c:560 namei(ffff80002c9010e8) at namei+0x36a sys/kern/vfs_lookup.c:244 vn_open(ffff80002c9010e8,243,0) at vn_open+0x188 sys/kern/vfs_vnops.c:107 doopenat(ffff80002b078540,ffffff9c,20001240,242,0,ffff80002c9012c0) at doopenat+0x26a sys/kern/vfs_syscalls.c:1127 syscall(ffff80002c901340) at syscall+0x435 mi_syscall sys/sys/syscall_mi.h:101 [inline] syscall(ffff80002c901340) at syscall+0x435 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xcdae417f30, count: -8 ddb{0}> show registers rdi 0 rsi 0 rbp 0xffff80002c900d50 rbx 0 rdx 0 rcx 0xffffffff rax 0xfffffd806a5f64b0 r8 0xffffffffffffffff r9 0xfffffd807f7d7548 r10 0xf56e080ec2a89e66 r11 0xac48388563949371 r12 0 r13 0 r14 0 r15 0xffff80001a5bf000 rip 0xffffffff823e1a6e ufs_lookup+0x4ce cs 0x8 rflags 0x10202 __ALIGN_SIZE+0xf202 rsp 0xffff80002c900c50 ss 0x10 ufs_lookup+0x4ce: movzwl 0x4(%r15,%r13,1),%ebx ddb{0}> show proc PROC (syz-executor.0) pid=394047 stat=onproc flags process=0 proc=4000000 pri=32, usrpri=67, nice=20 forw=0xffffffffffffffff, list=0xffff80002b078d20,0xffffffff829f2820 process=0xffff800027c15908 user=0xffff80002c8fc000, vmspace=0xfffffd80688e5018 estcpu=17, cpticks=1, pctcpu=0.0 user=0, sys=1, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 50097 282542 38896 0 2 0 syz-executor.7 50097 284815 38896 0 3 0x4000080 fsleep syz-executor.7 70246 158419 23267 0 2 0 syz-executor.2 70246 327062 23267 0 3 0x4000080 fsleep syz-executor.2 90888 61331 701 0 2 0 syz-executor.0 90888 178073 701 0 3 0x4000080 ttyout syz-executor.0 *90888 394047 701 0 7 0x4000000 syz-executor.0 94301 18643 1 0 3 0x100083 ttyin getty 23267 121571 85587 0 2 0x482 syz-executor.2 19210 157850 85587 0 3 0x82 piperd syz-executor.5 38896 153910 85587 0 2 0x482 syz-executor.7 45135 522324 85587 0 3 0x82 piperd syz-executor.1 37664 278180 0 0 3 0x14200 acct acct 92155 160645 85587 0 3 0x82 piperd syz-executor.6 701 437552 85587 0 2 0x482 syz-executor.0 17578 251709 0 0 3 0x14280 nfsidl nfsio 99599 304563 0 0 3 0x14280 nfsidl nfsio 60779 403752 0 0 3 0x14280 nfsidl nfsio 74790 54443 0 0 3 0x14280 nfsidl nfsio 69311 281471 0 0 3 0x14280 nfsidl nfsio 14037 407742 0 0 3 0x14280 nfsidl nfsio 97025 517662 0 0 3 0x14280 nfsidl nfsio 9072 123917 0 0 3 0x14280 nfsidl nfsio 58885 444340 0 0 3 0x14280 nfsidl nfsio 56709 406092 0 0 3 0x14280 nfsidl nfsio 22973 307700 0 0 3 0x14280 nfsidl nfsio 82060 390646 0 0 3 0x14280 nfsidl nfsio 67899 515994 0 0 3 0x14280 nfsidl nfsio 48825 517339 0 0 3 0x14280 nfsidl nfsio 42802 193295 0 0 3 0x14280 nfsidl nfsio 91876 312018 0 0 3 0x14280 nfsidl nfsio 8908 246082 0 0 3 0x14280 nfsidl nfsio 67673 227536 0 0 3 0x14280 nfsidl nfsio 33963 84598 0 0 3 0x14280 nfsidl nfsio 87284 256440 0 0 3 0x14280 nfsidl nfsio 98080 438550 85587 0 3 0x82 piperd syz-executor.3 12134 40454 85587 0 3 0x82 piperd syz-executor.4 60375 15117 0 0 3 0x14200 bored sosplice 85587 370937 5835 0 3 0x82 thrsleep syz-fuzzer 85587 155861 5835 0 3 0x4000082 thrsleep syz-fuzzer 85587 79237 5835 0 3 0x4000082 wait syz-fuzzer 85587 423470 5835 0 3 0x4000082 thrsleep syz-fuzzer 85587 496362 5835 0 3 0x4000082 thrsleep syz-fuzzer 85587 334269 5835 0 3 0x4000082 kqread syz-fuzzer 85587 417595 5835 0 3 0x4000082 wait syz-fuzzer 85587 239628 5835 0 3 0x4000082 thrsleep syz-fuzzer 85587 213991 5835 0 3 0x4000082 wait syz-fuzzer 85587 521886 5835 0 3 0x4000082 wait syz-fuzzer 85587 450900 5835 0 3 0x4000082 wait syz-fuzzer 85587 28370 5835 0 3 0x4000082 thrsleep syz-fuzzer 85587 253973 5835 0 3 0x4000082 thrsleep syz-fuzzer 85587 322285 5835 0 3 0x4000082 wait syz-fuzzer 85587 463981 5835 0 3 0x4000082 wait syz-fuzzer 85587 306439 5835 0 3 0x4000082 wait syz-fuzzer 5835 268797 79935 0 3 0x10008a sigsusp ksh 79935 484337 86386 0 3 0x9a kqread sshd 86386 468076 1 0 3 0x88 kqread sshd 17183 64564 48387 74 3 0x1100092 bpf pflogd 48387 471166 1 0 3 0x80 netio pflogd 16865 217842 66955 73 3 0x1100090 kqread syslogd 66955 389473 1 0 3 0x100082 netio syslogd 68097 116647 1 0 3 0x100080 kqread resolvd 84582 177996 82275 77 3 0x100092 kqread dhcpleased 47045 107803 82275 77 3 0x100092 kqread dhcpleased 82275 344295 1 0 3 0x80 kqread dhcpleased 83746 430841 0 0 3 0x14200 bored smr 52861 258025 0 0 2 0x14200 zerothread 28846 309049 0 0 3 0x14200 aiodoned aiodoned 83073 139896 0 0 3 0x14200 syncer update 59443 36830 0 0 3 0x14200 cleaner cleaner 84101 246880 0 0 3 0x14200 reaper reaper 72072 499709 0 0 3 0x14200 pgdaemon pagedaemon 99676 415582 0 0 3 0x14200 bored viomb 86327 395947 0 0 3 0x40014200 acpi0 acpi0 28291 129309 0 0 7 0x40014200 idle1 13173 98494 0 0 3 0x14200 bored softnet 97961 37426 0 0 3 0x14200 bored softnet 66942 235955 0 0 3 0x14200 bored softnet 58766 191386 0 0 3 0x14200 bored softnet 66274 15772 0 0 3 0x14200 bored systqmp 45101 423808 0 0 3 0x14200 bored systq 48656 399472 0 0 3 0x40014200 bored softclock 74557 35373 0 0 3 0x40014200 idle0 1 472886 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 90888 (syz-executor.0) thread 0xffff80002b078540 (394047) exclusive rrwlock inode r = 0 (0xfffffd80689f5d58) #0 witness_lock+0x44d #1 rw_enter+0x3e1 sys/kern/kern_rwlock.c:310 #2 rrw_enter+0x8b sys/kern/kern_rwlock.c:465 #3 VOP_LOCK+0x87 sys/kern/vfs_vops.c:518 #4 vn_lock+0x84 sys/kern/vfs_vnops.c:564 #5 vfs_lookup+0xd1 sys/kern/vfs_lookup.c:412 #6 namei+0x36a sys/kern/vfs_lookup.c:244 #7 vn_open+0x188 sys/kern/vfs_vnops.c:107 #8 doopenat+0x26a sys/kern/vfs_syscalls.c:1127 #9 syscall+0x435 mi_syscall sys/sys/syscall_mi.h:101 [inline] #9 syscall+0x435 sys/arch/amd64/amd64/trap.c:585 #10 Xsyscall+0x128 exclusive kernel_lock &kernel_lock r = 1 (0xffffffff829f36e0) #0 witness_lock+0x44d #1 syscall+0x41d mi_syscall sys/sys/syscall_mi.h:100 [inline] #1 syscall+0x41d sys/arch/amd64/amd64/trap.c:585 #2 Xsyscall+0x128 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10226 6510K 7013K 78643K 39438 0 pcb 13 18K 22K 78643K 10520 0 rtable 206 17K 19K 78643K 5379 0 ifaddr 118 30K 31K 78643K 1642 0 sysctl 2 0K 1K 78643K 14 0 counters 58 35K 36K 78643K 824 0 ioctlops 0 0K 4K 78643K 4386 0 iov 0 0K 32K 78643K 18397 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 4 0 vnodes 1455 91K 91K 78643K 9368 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 9K 78643K 157 0 VM map 2 1K 1K 78643K 2 0 sem 18 3K 6K 78643K 223 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12548 0 file desc 13 45K 74K 78643K 22402 0 sigio 0 0K 0K 78643K 453 0 proc 70 91K 128K 78643K 3113 0 subproc 104 6K 7K 78643K 941 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 1563 0 in_multi 84 5K 7K 78643K 1370 0 ether_multi 1 0K 0K 78643K 129 0 mrt 1 0K 0K 78643K 59 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 175 784K 784K 78643K 175 0 exec 0 0K 2K 78643K 5132 0 pfkey data 0 0K 0K 78643K 44 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 62K 78643K 8 0 UVM amap 563 1149K 1149K 78643K 127496 0 UVM aobj 131 8K 8K 78643K 143 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 444 0 NDP 17 0K 1K 78643K 486 0 temp 157 4727K 5751K 78643K 142374 0 kqueue 12 18K 28K 78643K 3073 0 SYN cache 2 16K 16K 78643K 2 0 ddb{0}> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle plcache 128 22 0 0 1 0 1 1 0 8 0 rtpcb 120 8125 0 8122 65 64 1 4 0 8 0 rtentry 112 1094 0 1013 4 1 3 4 0 8 0 unpcb 144 11314 0 11299 134 128 6 10 0 8 5 syncache 296 64 0 64 18 18 0 1 0 8 0 tcpqe 32 132 0 132 5 5 0 1 0 8 0 tcpcb 768 10219 0 10215 214 213 1 21 0 8 0 arp 120 154 0 140 1 0 1 1 0 8 0 inpcb 368 28470 0 28463 314 313 1 16 0 8 0 nd6 48 275 0 256 1 0 1 1 0 8 0 pkpcb 40 222 0 222 8 8 0 1 0 8 0 kcovpl 48 72 0 64 1 0 1 1 0 8 0 ppxss 1256 238 0 238 23 23 0 1 0 8 0 pfstscr 40 3 0 3 1 1 0 1 0 8 0 pffrag 232 131 0 129 10 9 1 1 0 482 0 pffrnode 88 131 0 129 10 9 1 1 0 8 0 pffrent 40 339 0 337 10 9 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 pfrktable 1344 23 0 21 1 0 1 1 0 8 0 pfanchor 1280 23 0 0 2 0 2 2 0 8 0 pftag 88 3 0 2 2 1 1 1 0 8 0 pfstitem 24 71 0 69 1 0 1 1 0 8 0 pfstkey 120 77 0 75 1 0 1 1 0 8 0 pfstate 336 74 0 72 3 2 1 3 0 8 0 pfrule 1360 85 0 71 3 1 2 2 0 8 0 rttmr 136 9 0 9 3 3 0 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 5787 0 5394 50 24 26 30 0 8 0 art_table 32 5788 0 5394 4 0 4 4 0 8 0 art_node 16 1093 0 1022 1 0 1 1 0 8 0 sysvmsgpl 40 20 0 8 1 0 1 1 0 8 0 semupl 112 4 0 4 1 1 0 1 0 8 0 semapl 112 143 0 127 1 0 1 1 0 8 0 shmpl 112 140 0 12 4 0 4 4 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 32176 0 30690 94 0 94 94 0 8 0 ffsino 272 32176 0 30690 100 0 100 100 0 8 0 nchpl 144 63289 0 61649 63 0 63 63 0 8 0 rtmask 32 13 0 13 6 6 0 1 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 222711 0 222710 10 9 1 2 0 8 0 percpumem 16 424 0 383 1 0 1 1 0 8 0 vcpupl 2048 113 0 0 15 0 15 15 0 8 0 vmpool 568 136 0 23 10 1 9 9 0 8 0 pfiaddrpl 120 8 0 6 1 0 1 1 0 8 0 kstatmem 264 624 0 590 6 3 3 3 0 8 0 scsiplug 72 12 0 12 4 4 0 1 0 8 0 scxspl 216 187069 0 187069 41 40 1 8 0 8 1 plimitpl 152 3079 0 3064 1 0 1 1 0 8 0 sigapl 424 22604 0 22539 9 1 8 8 0 8 0 futexpl 64 243202 0 243200 2 1 1 1 0 8 0 knotepl 120 1240 0 0 17 0 17 17 0 8 0 kqueuepl 216 5534 0 5526 79 78 1 5 0 8 0 pipepl 320 3817 0 3789 114 111 3 8 0 8 0 fdescpl 496 22561 0 22535 7 3 4 5 0 8 0 filepl 152 159763 0 159522 263 248 15 23 0 8 5 lockfpl 104 4456 0 4454 9 8 1 2 0 8 0 lockfspl 48 1400 0 1398 1 0 1 1 0 8 0 sessionpl 144 89 0 72 1 0 1 1 0 8 0 pgrppl 48 279 0 262 1 0 1 1 0 8 0 ucredpl 104 20162 0 20147 1 0 1 1 0 8 0 zombiepl 144 22539 0 22539 4 3 1 1 0 8 1 processpl 1064 22604 0 22539 5 0 5 5 0 8 0 procpl 672 59937 0 59853 34 25 9 9 0 8 0 srpgc 96 128 0 128 23 23 0 1 0 8 0 sosppl 168 153 0 153 29 29 0 1 0 8 0 sockpl 488 48148 0 48123 851 839 12 34 0 8 8 mcl64k 65536 17 0 0 3 0 3 3 0 8 0 mcl16k 16384 17 0 0 3 0 3 3 0 8 0 mcl12k 12288 25 0 0 2 0 2 2 0 8 0 mcl9k 9216 22 0 0 2 0 2 2 0 8 0 mcl8k 8192 17 0 0 3 1 2 3 0 8 0 mcl4k 4096 25 0 0 4 1 3 3 0 8 0 mcl2k2 2112 5 0 0 1 0 1 1 0 8 0 mcl2k 2048 552 0 0 46 21 25 46 0 8 0 mtagpl 96 1053 0 0 13 0 13 13 0 8 0 mbufpl 256 8235 0 0 490 0 490 490 0 8 0 bufpl 288 65251 0 58917 453 0 453 453 0 8 0 anonpl 24 4400033 0 4384118 414 297 117 192 0 186 0 amapchunkpl 152 375433 0 374695 81 45 36 62 0 158 0 amappl16 200 65787 0 65191 213 177 36 56 0 8 0 amappl15 192 5889 0 5882 1 0 1 1 0 8 0 amappl14 184 3908 0 3899 1 0 1 1 0 8 0 amappl13 176 3518 0 3517 1 0 1 1 0 8 0 amappl12 168 2082 0 2075 1 0 1 1 0 8 0 amappl11 160 1610 0 1591 3 2 1 2 0 8 0 amappl10 152 1862 0 1860 1 0 1 1 0 8 0 amappl9 144 5030 0 5024 1 0 1 1 0 8 0 amappl8 136 2562 0 2407 6 0 6 6 0 8 0 amappl7 128 900 0 872 1 0 1 1 0 8 0 amappl6 120 5191 0 5176 2 1 1 2 0 8 0 amappl5 112 18865 0 18846 1 0 1 1 0 8 0 amappl4 104 5786 0 5748 2 0 2 2 0 8 0 amappl3 96 70544 0 70496 2 0 2 2 0 8 0 amappl2 88 5369 0 5323 2 0 2 2 0 8 0 amappl1 80 552934 0 552308 21 5 16 20 0 8 0 amappl 88 125439 0 125179 8 1 7 7 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 72 142 0 12 3 0 3 3 0 8 0 uaddrrnd 24 22697 0 22558 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 22697 0 22558 1 0 1 1 0 8 0 vmmpekpl 168 151993 0 151908 6 1 5 5 0 8 0 vmmpepl 168 2188329 0 2185630 385 241 144 178 0 357 0 vmsppl 368 22696 0 22558 18 4 14 14 0 8 0 rwobjpl 56 531891 0 524052 142 27 115 118 0 8 0 pdppl 4096 45401 0 45229 856 674 182 182 0 8 10 pvpl 32 8663615 0 8643530 726 530 196 322 0 265 0 pmappl 248 22696 0 22558 11 2 9 9 0 8 0 extentpl 40 56 0 38 1 0 1 1 0 8 0 phpool 112 2495 0 1075 41 0 41 41 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace ufs_lookup() at ufs_lookup+0x4ce sys/ufs/ufs/ufs_lookup.c:281 VOP_LOOKUP(fffffd806a8482c8,ffff80002c901118,ffff80002c901148) at VOP_LOOKUP+0x58 sys/kern/vfs_vops.c:85 vfs_lookup(ffff80002c9010e8) at vfs_lookup+0x6e5 sys/kern/vfs_lookup.c:560 namei(ffff80002c9010e8) at namei+0x36a sys/kern/vfs_lookup.c:244 vn_open(ffff80002c9010e8,243,0) at vn_open+0x188 sys/kern/vfs_vnops.c:107 doopenat(ffff80002b078540,ffffff9c,20001240,242,0,ffff80002c9012c0) at doopenat+0x26a sys/kern/vfs_syscalls.c:1127 syscall(ffff80002c901340) at syscall+0x435 mi_syscall sys/sys/syscall_mi.h:101 [inline] syscall(ffff80002c901340) at syscall+0x435 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xcdae417f30, count: -8 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp x86_ipi_db(ffff800020dd8ff0) at x86_ipi_db+0x1a sys/arch/amd64/amd64/db_interface.c:393 x86_ipi_handler() at x86_ipi_handler+0xb7 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x23 acpicpu_idle() at acpicpu_idle+0x312 sys/dev/acpi/acpicpu.c:1206 sched_idle(ffff800020dd8ff0) at sched_idle+0x417 sys/kern/kern_sched.c:175 end trace frame: 0x0, count: 10 ddb{1}> trace x86_ipi_db(ffff800020dd8ff0) at x86_ipi_db+0x1a sys/arch/amd64/amd64/db_interface.c:393 x86_ipi_handler() at x86_ipi_handler+0xb7 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x23 acpicpu_idle() at acpicpu_idle+0x312 sys/dev/acpi/acpicpu.c:1206 sched_idle(ffff800020dd8ff0) at sched_idle+0x417 sys/kern/kern_sched.c:175 end trace frame: 0x0, count: -5