uvm_fault(0xffffffff8354a888, 0xffff800028832004, 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 *423127 23048 0 0 0x4000000 0 syz-executor 497143 95437 0 0 0x4000000 1 syz-executor ufs_lookup() at ufs_lookup+0x5e1 sys/ufs/ufs/ufs_lookup.c:279 VOP_LOOKUP(fffffd8074c7a7f8,ffff8000349d4730,ffff8000349d4760) at VOP_LOOKUP+0x6e sys/kern/vfs_vops.c:85 vfs_lookup(ffff8000349d4700) at vfs_lookup+0x8fa sys/kern/vfs_lookup.c:566 namei(ffff8000349d4700) at namei+0x7aa sys/kern/vfs_lookup.c:250 domknodat(ffff80002a0407b0,ffffff9c,20000000,2000,d02) at domknodat+0xb4 sys/kern/vfs_syscalls.c:1576 syscall(ffff8000349d4900) at syscall+0xaf8 mi_syscall sys/sys/syscall_mi.h:179 [inline] syscall(ffff8000349d4900) at syscall+0xaf8 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xaf649ef84e0, count: 8 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(0xffffffff8354a888, 0xffff800028832004, 0, 1) -> d ddb{0}> trace ufs_lookup() at ufs_lookup+0x5e1 sys/ufs/ufs/ufs_lookup.c:279 VOP_LOOKUP(fffffd8074c7a7f8,ffff8000349d4730,ffff8000349d4760) at VOP_LOOKUP+0x6e sys/kern/vfs_vops.c:85 vfs_lookup(ffff8000349d4700) at vfs_lookup+0x8fa sys/kern/vfs_lookup.c:566 namei(ffff8000349d4700) at namei+0x7aa sys/kern/vfs_lookup.c:250 domknodat(ffff80002a0407b0,ffffff9c,20000000,2000,d02) at domknodat+0xb4 sys/kern/vfs_syscalls.c:1576 syscall(ffff8000349d4900) at syscall+0xaf8 mi_syscall sys/sys/syscall_mi.h:179 [inline] syscall(ffff8000349d4900) at syscall+0xaf8 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xaf649ef84e0, count: -7 ddb{0}> show registers rdi 0 rsi 0 rbp 0xffff8000349d44a0 rbx 0 rdx 0xffff80000119ed00 rcx 0xffffffff rax 0xfffffd806d00d598 r8 0xffffffffffffffff r9 0xfffffd807f7d3548 r10 0x63f662606332890 r11 0x2d478d79aa0d8a38 r12 0 r13 0xfffffd806f4b9ef0 r14 0 r15 0xffff800028832000 rip 0xffffffff829bc8c1 ufs_lookup+0x5e1 cs 0x8 rflags 0x10202 __ALIGN_SIZE+0xf202 rsp 0xffff8000349d4390 ss 0 ufs_lookup+0x5e1: movzwl 0x4(%r15,%rbx,1),%r14d ddb{0}> show proc PROC (syz-executor) tid=423127 pid=23048 tcnt=2 stat=onproc flags process=0 proc=4000000 runpri=86, usrpri=86, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff800029fd8cb0,0xffffffff83569200 process=0xffff800029feb668 user=0xffff8000349cf000, vmspace=0xfffffd806b6d01c0 estcpu=36, cpticks=1, pctcpu=0.0, user=0, sys=1, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 23048 409515 78251 0 2 0 syz-executor *23048 423127 78251 0 7 0x4000000 syz-executor 31935 146742 63281 0 2 0 syz-executor 31935 19999 63281 0 3 0x4000080 fsleep syz-executor 31935 519884 63281 0 3 0x4000080 fsleep syz-executor 7055 311238 98081 60929 3 0x90 nanoslp syz-executor 7055 481465 98081 60929 2 0x4000010 syz-executor 43842 194145 3303 60929 3 0x3010 suspend syz-executor 43842 188171 3303 60929 2 0x4081010 syz-executor 43842 346367 3303 60929 2 0x4081010 syz-executor 28445 381051 3854 0 2 0 syz-executor 28445 393391 3854 0 3 0x4000080 fsleep syz-executor 28445 426062 3854 0 3 0x4000080 fsleep syz-executor 95437 278306 9211 0 2 0 syz-executor 95437 497143 9211 0 7 0x4000000 syz-executor 95437 69161 9211 0 3 0x4000080 fsleep syz-executor 95437 222479 9211 0 3 0x4000080 fsleep syz-executor 73221 420758 17928 0 2 0 syz-executor 73221 83499 17928 0 3 0x4000080 fsleep syz-executor 73221 372150 17928 0 3 0x4000080 fsleep syz-executor 73221 367927 17928 0 3 0x4000080 fsleep syz-executor 98081 188126 27051 0 3 0x82 nanoslp syz-executor 78251 470943 27051 0 3 0x82 nanoslp syz-executor 9211 186870 27051 0 3 0x82 nanoslp syz-executor 63281 327501 27051 0 3 0x82 nanoslp syz-executor 3854 473880 27051 0 3 0x82 nanoslp syz-executor 3303 265076 27051 0 3 0x82 nanoslp syz-executor 17928 278674 27051 0 3 0x82 nanoslp syz-executor 25299 413700 0 0 3 0x14200 bored sosplice 27051 186555 30149 0 3 0x82 wait syz-executor 30149 362482 89294 0 3 0x10008a sigsusp ksh 89294 298145 4808 0 3 0x98 kqread sshd-session 4808 96752 56410 0 3 0x92 kqread sshd-session 88669 194369 1 0 3 0x100083 ttyin getty 56410 411833 1 0 3 0x88 kqread sshd 52870 495426 6607 74 3 0x1100092 bpf pflogd 6607 483882 1 0 3 0x80 sbwait pflogd 40670 219592 43597 73 3 0x1100090 kqread syslogd 43597 487205 1 0 3 0x100082 sbwait syslogd 3976 245378 1 0 3 0x100080 kqread resolvd 70988 429830 65531 77 3 0x100092 kqread dhcpleased 71746 345584 65531 77 3 0x100092 kqread dhcpleased 65531 28622 1 0 3 0x80 kqread dhcpleased 30879 219237 0 0 3 0x14200 bored smr 55928 35065 0 0 3 0x14200 pgzero zerothread 30894 95366 0 0 3 0x14200 aiodoned aiodoned 67092 148642 0 0 3 0x14200 syncer update 33390 180885 0 0 3 0x14200 cleaner cleaner 33598 136062 0 0 3 0x14200 reaper reaper 25529 494675 0 0 3 0x14200 pgdaemon pagedaemon 78273 115596 0 0 3 0x14200 bored viomb 87552 178618 0 0 3 0x40014200 acpi0 acpi0 84530 337871 0 0 3 0x40014200 idle1 16324 6564 0 0 3 0x14200 bored softnet3 56757 490693 0 0 3 0x14200 bored softnet2 90312 158493 0 0 3 0x14200 bored softnet1 38408 375242 0 0 3 0x14200 bored softnet0 44250 517250 0 0 3 0x14200 bored systqmp 1615 391266 0 0 3 0x14200 bored systq 63435 163781 0 0 3 0x14200 tmoslp softclockmp 93548 101534 0 0 3 0x40014200 tmoslp softclock 93198 492433 0 0 3 0x40014200 idle0 1 137993 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 23048 (syz-executor) thread 0xffff80002a0407b0 (423127) exclusive rrwlock inode r = 0 (0xfffffd806f4b9f88) #0 witness_lock+0x5b8 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5b8 sys/kern/subr_witness.c:1151 #1 rw_enter+0x41b sys/kern/kern_rwlock.c:309 #2 rrw_enter+0xbe sys/kern/kern_rwlock.c:464 #3 VOP_LOCK+0xa6 sys/kern/vfs_vops.c:524 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:564 #5 vfs_lookup+0x109 sys/kern/vfs_lookup.c:418 #6 namei+0x7aa sys/kern/vfs_lookup.c:250 #7 domknodat+0xb4 sys/kern/vfs_syscalls.c:1576 #8 syscall+0xaf8 mi_syscall sys/sys/syscall_mi.h:179 [inline] #8 syscall+0xaf8 sys/arch/amd64/amd64/trap.c:577 #9 Xsyscall+0x128 exclusive kernel_lock &kernel_lock r = 0 (0xffffffff83561d10) #0 witness_lock+0x5b8 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5b8 sys/kern/subr_witness.c:1151 #1 __mp_acquire_count+0x58 #2 mi_switch+0x658 sys/kern/sched_bsd.c:460 #3 yield+0x6a sys/kern/sched_bsd.c:320 #4 pool_get+0x242 sys/kern/subr_pool.c:589 #5 namei+0xdf sys/kern/vfs_lookup.c:145 #6 domknodat+0xb4 sys/kern/vfs_syscalls.c:1576 #7 syscall+0xaf8 mi_syscall sys/sys/syscall_mi.h:179 [inline] #7 syscall+0xaf8 sys/arch/amd64/amd64/trap.c:577 #8 Xsyscall+0x128 Process 7055 (syz-executor) thread 0xffff80002a03e530 (481465) exclusive rrwlock inode r = 0 (0xfffffd806b4034e0) #0 witness_lock+0x5b8 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5b8 sys/kern/subr_witness.c:1151 #1 rw_enter+0x41b sys/kern/kern_rwlock.c:309 #2 rrw_enter+0xbe sys/kern/kern_rwlock.c:464 #3 VOP_LOCK+0xa6 sys/kern/vfs_vops.c:524 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:564 #5 vn_write+0x18d sys/kern/vfs_vnops.c:405 #6 dofilewritev+0x23c sys/kern/sys_generic.c:380 #7 sys_write+0xa2 sys/kern/sys_generic.c:300 #8 syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:179 [inline] #8 syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 #9 Xsyscall+0x128 Process 43842 (syz-executor) thread 0xffff80002a03ea40 (346367) exclusive rwlock futex r = 0 (0xffffffff834dfb80) #0 witness_lock+0x5b8 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5b8 sys/kern/subr_witness.c:1151 #1 sys_futex+0x69 sys/kern/sys_futex.c:98 #2 syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:179 [inline] #2 syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 #3 Xsyscall+0x128 Process 95437 (syz-executor) thread 0xffff8000ffff2f60 (497143) exclusive rwlock fdlock r = 0 (0xfffffd806b8f5c00) #0 witness_lock+0x5b8 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5b8 sys/kern/subr_witness.c:1151 #1 doopenat+0x173 #2 syscall+0xaf8 mi_syscall sys/sys/syscall_mi.h:179 [inline] #2 syscall+0xaf8 sys/arch/amd64/amd64/trap.c:577 #3 Xsyscall+0x128 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10198 10156K 10285K 166960K 11485 0 pcb 17 12K 12K 166960K 49 0 rtable 234 6K 6K 166960K 602 0 pf 34 17K 18K 166960K 66 0 ifaddr 44 7K 7K 166960K 82 0 ifgroup 55 2K 2K 166960K 93 0 counters 64 36K 36K 166960K 84 0 ioctlops 0 0K 4K 166960K 1502 0 iov 0 0K 12K 166960K 15 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1415 89K 89K 166960K 1625 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 1K 166960K 2 0 VM map 2 1K 1K 166960K 2 0 sem 8 0K 0K 166960K 10 0 dirhash 12 2K 2K 166960K 15 0 ACPI 1690 195K 286K 166960K 12418 0 file desc 17 61K 89K 166960K 376 0 sigio 2 0K 0K 166960K 8 0 proc 72 91K 128K 166960K 760 0 subproc 104 6K 7K 166960K 208 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 16 0 in_multi 103 7K 7K 166960K 191 0 ether_multi 1 0K 0K 166960K 2 0 mrt 0 0K 0K 166960K 1 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 61 281K 281K 166960K 61 0 exec 0 0K 1K 166960K 471 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 251 73K 82K 166960K 4616 0 UVM aobj 5 2K 2K 166960K 5 0 pinsyscall 42 84K 104K 166960K 1653 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 6 0 NDP 16 0K 2K 166960K 54 0 temp 39 6811K 6879K 166960K 8064 0 kqueue 15 22K 28K 166960K 46 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 57 0 54 1 0 1 1 0 8 0 rtentry 112 204 0 94 4 0 4 4 0 8 0 unpcb 144 137 0 115 1 0 1 1 0 8 0 syncache 336 3 0 3 1 1 0 1 0 8 0 tcpcb 808 99 0 95 8 4 4 8 0 8 3 arp 120 35 0 17 1 0 1 1 0 8 0 inpcb 336 275 0 267 7 4 3 7 0 8 1 nd6 136 49 0 25 1 0 1 1 0 8 0 pkpcb 40 4 0 4 2 1 1 1 0 8 1 kcovpl 48 16 0 8 1 0 1 1 0 8 0 ppxss 1168 1 0 1 1 1 0 1 0 8 0 pffrag 232 3 0 0 1 0 1 1 0 482 0 pffrnode 88 3 0 0 1 0 1 1 0 8 0 pffrent 40 4 0 1 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 pfstitem 24 37 0 10 1 0 1 1 0 8 0 pfstkey 128 37 0 10 1 0 1 1 0 8 0 pfstate 376 37 0 10 3 0 3 3 0 8 0 pfrule 1344 21 0 15 2 0 2 2 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 814 0 358 29 0 29 29 0 8 0 art_table 32 815 0 358 4 0 4 4 0 8 0 art_node 16 202 0 102 1 0 1 1 0 8 0 sysvmsgpl 40 2 0 1 1 0 1 1 0 8 0 semapl 112 6 0 0 1 0 1 1 0 8 0 shmpl 112 2 0 0 1 0 1 1 0 8 0 dirhash 1024 19 0 2 3 0 3 3 0 8 0 dino2pl 256 1807 0 279 96 0 96 96 0 8 0 ffsino 272 1807 0 279 102 0 102 102 0 8 0 nchpl 144 2161 0 454 64 0 64 64 0 8 0 uvmvnodes 80 2102 0 0 43 0 43 43 0 8 0 vnodes 216 2102 0 0 117 0 117 117 0 8 0 namei 1024 7455 0 7454 2 1 1 1 0 8 0 percpumem 16 56 0 10 1 0 1 1 0 8 0 kstatmem 264 44 0 20 2 0 2 2 0 8 0 scxspl 216 13202 0 13202 3 2 1 2 1 8 1 plimitpl 152 60 0 42 1 0 1 1 0 8 0 sigapl 424 660 0 610 8 1 7 7 0 8 0 futexpl 64 1960 0 1949 2 1 1 1 0 8 0 knotepl 120 302 0 0 10 0 10 10 0 8 1 kqueuepl 216 58 0 48 1 0 1 1 0 8 0 pipepl 320 143 0 111 3 0 3 3 0 8 0 fdescpl 496 640 0 609 6 1 5 5 0 8 0 filepl 152 2673 0 2405 18 6 12 16 0 8 0 lockfpl 104 49 0 45 1 0 1 1 0 8 0 lockfspl 48 24 0 20 1 0 1 1 0 8 0 sessionpl 144 30 0 21 1 0 1 1 0 8 0 pgrppl 48 118 0 101 1 0 1 1 0 8 0 ucredpl 104 307 0 292 1 0 1 1 0 8 0 zombiepl 144 676 0 674 2 1 1 1 0 8 0 processpl 1160 660 0 610 5 1 4 5 0 8 0 procpl 648 883 0 818 7 1 6 6 0 8 0 srpgc 96 2 0 2 1 0 1 1 0 8 1 sockpl 664 475 0 442 9 4 5 9 0 8 1 mcl64k 65536 2 0 0 1 0 1 1 0 8 0 mcl16k 16384 3 0 0 1 0 1 1 0 8 0 mcl12k 12288 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 5 0 0 1 0 1 1 0 8 0 mcl4k 4096 5 0 0 1 0 1 1 0 8 0 mcl2k 2048 222 0 0 28 0 28 28 0 8 0 mtagpl 96 5 0 0 1 0 1 1 0 8 0 mbufpl 256 226 0 0 15 0 15 15 0 8 0 bufpl 280 7046 0 871 442 0 442 442 0 8 0 anonpl 24 151173 0 147667 60 3 57 57 0 185 17 amapchunkpl 152 14361 0 13811 33 2 31 32 0 158 6 amappl16 200 3518 0 3501 18 4 14 14 0 8 12 amappl15 192 7 0 7 1 1 0 1 0 8 0 amappl14 184 127 0 115 1 0 1 1 0 8 0 amappl13 176 9 0 9 2 1 1 1 0 8 1 amappl12 168 1408 0 1377 3 1 2 2 0 8 0 amappl11 160 57 0 43 1 0 1 1 0 8 0 amappl10 152 13 0 13 1 1 0 1 0 8 0 amappl9 144 182 0 182 1 1 0 1 0 8 0 amappl8 136 19 0 17 1 0 1 1 0 8 0 amappl7 128 120 0 108 1 0 1 1 0 8 0 amappl6 120 240 0 239 1 0 1 1 0 8 0 amappl5 112 165 0 154 1 0 1 1 0 8 0 amappl4 104 327 0 310 1 0 1 1 0 8 0 amappl3 96 2836 0 2710 4 0 4 4 0 8 0 amappl2 88 783 0 715 2 0 2 2 0 8 0 amappl1 80 8747 0 8182 14 1 13 14 0 8 0 amappl 88 4184 0 3995 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 4 0 0 1 0 1 1 0 8 0 uaddrrnd 24 640 0 609 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 640 0 609 1 0 1 1 0 8 0 vmmpekpl 168 6659 0 6603 3 0 3 3 0 8 0 vmmpepl 168 47099 0 45239 97 0 97 97 0 357 3 vmsppl 440 639 0 609 6 2 4 5 0 8 0 rwobjpl 56 19200 0 16155 48 0 48 48 0 8 0 pdppl 4096 1287 0 1218 115 38 77 83 0 8 8 pvpl 32 28549 0 0 233 2 231 231 0 265 0 pmappl 248 639 0 609 3 0 3 3 0 8 0 extentpl 40 56 0 38 1 0 1 1 0 8 0 phpool 112 415 0 51 11 0 11 11 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(fffffd8074c7a7f8,ffff8000349d4730,ffff8000349d4760) at VOP_LOOKUP+0x6e sys/kern/vfs_vops.c:85 vfs_lookup(ffff8000349d4700) at vfs_lookup+0x8fa sys/kern/vfs_lookup.c:566 namei(ffff8000349d4700) at namei+0x7aa sys/kern/vfs_lookup.c:250 domknodat(ffff80002a0407b0,ffffff9c,20000000,2000,d02) at domknodat+0xb4 sys/kern/vfs_syscalls.c:1576 syscall(ffff8000349d4900) at syscall+0xaf8 mi_syscall sys/sys/syscall_mi.h:179 [inline] syscall(ffff8000349d4900) at syscall+0xaf8 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xaf649ef84e0, count: -7 ddb{0}> machine ddbcpu 1