uvm_fault(0xffffffff839d7e30, 0xffff80001bf72004, 0, 1) -> d kernel: page fault trap, code=0 Stopped at ufs_lookup+0x623: movzwl 0x4(%r15,%r14,1),%ebx TID PID UID PRFLAGS PFLAGS CPU COMMAND *121490 86689 0 0x2 0 0K syz-executor ufs_lookup() at ufs_lookup+0x623 sys/ufs/ufs/ufs_lookup.c:279 VOP_LOOKUP(fffffd806ccfb2c0,ffff80002a320040,ffff80002a320070) at VOP_LOOKUP+0x6e sys/kern/vfs_vops.c:85 vfs_lookup(ffff80002a320010) at vfs_lookup+0x93a sys/kern/vfs_lookup.c:566 namei(ffff80002a320010) at namei+0x7ca sys/kern/vfs_lookup.c:250 vn_open(ffff80002a320010,30001,0) at vn_open+0x15a sys/kern/vfs_vnops.c:140 doopenat(ffff8000ffffca68,ffffff9c,7296e8023c70,30000,0,ffff80002a3201c0) at doopenat+0x35b sys/kern/vfs_syscalls.c:1138 syscall(ffff80002a320270) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a320270) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7296e8023770, 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(0xffffffff839d7e30, 0xffff80001bf72004, 0, 1) -> d ddb{0}> trace ufs_lookup() at ufs_lookup+0x623 sys/ufs/ufs/ufs_lookup.c:279 VOP_LOOKUP(fffffd806ccfb2c0,ffff80002a320040,ffff80002a320070) at VOP_LOOKUP+0x6e sys/kern/vfs_vops.c:85 vfs_lookup(ffff80002a320010) at vfs_lookup+0x93a sys/kern/vfs_lookup.c:566 namei(ffff80002a320010) at namei+0x7ca sys/kern/vfs_lookup.c:250 vn_open(ffff80002a320010,30001,0) at vn_open+0x15a sys/kern/vfs_vnops.c:140 doopenat(ffff8000ffffca68,ffffff9c,7296e8023c70,30000,0,ffff80002a3201c0) at doopenat+0x35b sys/kern/vfs_syscalls.c:1138 syscall(ffff80002a320270) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a320270) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7296e8023770, count: -8 ddb{0}> show registers rdi 0 rsi 0x2 rbp 0xffff80002a31fc80 rbx 0 rdx 0 rcx 0xffff8000ffffca68 rax 0xffffffff83813ff0 cpu_info_full_primary+0x1ff0 r8 0xffffffffffffffff r9 0xfffffd80097fb680 r10 0x66cbbb579401e19d r11 0x981db75b624f2fa7 r12 0xfffffd806beff690 r13 0 r14 0 r15 0xffff80001bf72000 rip 0xffffffff827f3553 ufs_lookup+0x623 cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff80002a31fb90 ss 0x10 ufs_lookup+0x623: movzwl 0x4(%r15,%r14,1),%ebx ddb{0}> show proc PROC (syz-executor) tid=121490 pid=86689 tcnt=1 stat=onproc flags process=2 proc=0 runpri=32, usrpri=86, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff8000ffffc2a0,0xffff8000ffffcfa8 process=0xffff80002a2779d0 user=0xffff80002a31b000, vmspace=0xfffffd800b0277a0 estcpu=36, cpticks=58, pctcpu=0.25, user=1, sys=56, intr=1 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 14371 429880 71158 0 3 0x80 nanoslp syz-executor 14371 155247 71158 0 3 0x4000080 kqread syz-executor 14371 150390 71158 0 3 0x4000080 fsleep syz-executor 37961 274701 1 0 3 0x100083 ttyin getty 71158 176338 76757 0 3 0x82 nanoslp syz-executor 10830 173515 0 0 3 0x14200 acct acct 95092 447977 0 0 3 0x14200 bored sosplice 41178 283802 76757 0 3 0x82 nanoslp syz-executor 1878 1370 76757 0 3 0x82 nanoslp syz-executor *86689 121490 76757 0 7 0x2 syz-executor 76757 123180 35392 0 3 0x82 wait syz-executor 35392 216180 55189 0 3 0x10008a sigsusp ksh 55189 430628 81079 0 3 0x98 kqread sshd-session 81079 402422 65915 0 3 0x92 kqread sshd-session 65915 296441 1 0 3 0x88 kqread sshd 52607 498974 72276 74 3 0x1100092 bpf pflogd 72276 260745 1 0 3 0x80 sbwait pflogd 11611 279244 45104 73 3 0x1100090 kqread syslogd 45104 200443 1 0 3 0x100082 sbwait syslogd 86316 137882 1 0 3 0x100080 kqread resolvd 85898 500947 28537 77 3 0x100092 kqread dhcpleased 1458 304891 28537 77 3 0x100092 kqread dhcpleased 28537 78847 1 0 3 0x80 kqread dhcpleased 12030 201629 0 0 3 0x14200 bored smr 60114 236908 0 0 2 0x14200 zerothread 40466 517783 0 0 3 0x14200 aiodoned aiodoned 59884 283839 0 0 3 0x14200 syncer update 71425 315980 0 0 3 0x14200 cleaner cleaner 50851 333182 0 0 3 0x14200 reaper reaper 36130 30738 0 0 3 0x14200 pgdaemon pagedaemon 33626 259941 0 0 3 0x14200 bored viomb 74484 310042 0 0 3 0x40014200 acpi0 acpi0 48962 512587 0 0 7 0x40014200 idle1 95275 285591 0 0 3 0x14200 bored softnet1 12498 196670 0 0 3 0x14200 bored softnet0 29665 31151 0 0 3 0x14200 bored systqmp 89267 436335 0 0 3 0x14200 bored systq 2140 422219 0 0 3 0x14200 tmoslp softclockmp 44757 480912 0 0 3 0x40014200 tmoslp softclock 68206 31839 0 0 3 0x40014200 idle0 1 437879 0 0 3 0x80082 wait init 0 0 -1 0 3 0x10010200 scheduler swapper ddb{0}> show all locks Process 86689 (syz-executor) thread 0xffff8000ffffca68 (121490) exclusive rrwlock inode r = 0 (0xfffffd806ce13eb0) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 rw_do_enter_write+0x419 sys/kern/kern_rwlock.c:320 #2 rrw_enter+0xc6 sys/kern/kern_rwlock.c:621 #3 VOP_LOCK+0xa3 sys/kern/vfs_vops.c:527 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:570 #5 vfs_lookup+0x11c sys/kern/vfs_lookup.c:-1 #6 namei+0x7ca sys/kern/vfs_lookup.c:250 #7 vn_open+0x15a sys/kern/vfs_vnops.c:140 #8 doopenat+0x35b sys/kern/vfs_syscalls.c:1138 #9 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] #9 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:748 #10 Xsyscall+0x128 exclusive kernel_lock &kernel_lock r = 0 (0xffffffff839b30d0) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 doopenat+0x345 sys/kern/vfs_syscalls.c:1138 #2 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] #2 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:748 #3 Xsyscall+0x128 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10218 11053K 11185K 166960K 12110 0 pcb 19 16K 18K 166960K 232 0 rtable 221 16K 17K 166960K 745 0 pf 42 19K 67486K 166960K 457 0 ifaddr 43 7K 8K 166960K 106 0 ifgroup 67 2K 3K 166960K 188 0 sysctl 3 1K 9K 166960K 13 0 counters 72 37K 38K 166960K 192 0 ioctlops 0 0K 4K 166960K 1834 0 iov 0 0K 20K 166960K 49 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1406 88K 89K 166960K 2160 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 13 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 39 0 dirhash 12 2K 2K 166960K 33 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 13 45K 110K 166960K 1067 0 sigio 0 0K 0K 166960K 20 0 proc 72 115K 164K 166960K 666 0 subproc 72 4K 4K 166960K 81 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 147 0 in_multi 85 6K 7K 166960K 138 0 ether_multi 1 0K 0K 166960K 8 0 mrt 0 0K 0K 166960K 14 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 103 466K 466K 166960K 103 0 exec 0 0K 1K 166960K 463 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 0K 166960K 4 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 216 169K 184K 166960K 11371 0 UVM aobj 56 2K 2K 166960K 61 0 pinsyscall 38 76K 98K 166960K 2208 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 51 0 NDP 14 0K 1K 166960K 74 0 temp 75 8655K 8731K 166960K 43615 0 kqueue 14 22K 31K 166960K 211 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 26 0 0 1 0 1 1 0 8 0 rtpcb 120 161 0 157 3 2 1 3 0 8 0 rtentry 176 135 0 49 5 0 5 5 0 8 0 unpcb 144 594 0 577 7 6 1 4 0 8 0 syncache 336 11 0 11 3 3 0 1 0 8 0 tcpqe 32 1 0 1 1 1 0 1 0 8 0 tcpcb 736 416 0 410 13 3 10 10 0 8 9 arp 136 18 0 4 1 0 1 1 0 8 0 ipq 40 2 0 2 2 2 0 1 0 8 0 ipqe 40 6 0 6 2 2 0 1 0 8 0 inpcb 328 1184 0 1174 15 5 10 10 0 8 8 nd6 152 23 0 5 1 0 1 1 0 8 0 pkpcb 40 75 0 75 3 2 1 1 0 8 1 kcovpl 48 9 0 1 1 0 1 1 0 8 0 mppekey 1024 1 0 1 1 1 0 1 0 8 0 ppxss 1192 46 0 46 3 2 1 1 0 8 1 pppxif 1504 6 0 6 2 2 0 1 0 8 0 pfstscr 40 2 0 2 2 2 0 1 0 8 0 pffrag 232 6 0 2 1 0 1 1 0 482 0 pffrnode 88 6 0 2 1 0 1 1 0 8 0 pffrent 40 15 0 11 2 1 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 132 0 132 1 1 0 1 0 8 0 pfanchor 1288 33 0 33 1 1 0 1 0 8 0 pftag 88 66 0 66 1 1 0 1 0 8 0 pfstitem 24 64 0 13 1 0 1 1 0 8 0 pfstkey 128 69 0 18 2 0 2 2 0 8 0 pfstate 384 67 0 16 6 0 6 6 0 8 0 pfrule 1344 54 0 50 2 1 1 2 0 8 0 rttmr 136 3 0 3 3 3 0 1 0 8 0 art_heap8 4096 2 0 0 2 0 2 2 0 8 0 art_heap4 256 641 0 263 30 4 26 30 0 8 0 art_table 40 643 0 263 5 0 5 5 0 8 0 art_node 32 135 0 62 1 0 1 1 0 8 0 sysvmsgpl 40 16 0 10 1 0 1 1 0 8 0 semapl 112 37 0 27 1 0 1 1 0 8 0 shmpl 112 58 0 5 2 0 2 2 0 8 0 dirhash 1024 31 0 14 3 0 3 3 0 8 0 dino2pl 256 3463 0 1954 96 0 96 96 0 8 0 ffsino 296 3463 0 1954 117 0 117 117 0 8 0 nchpl 144 4983 0 3285 64 0 64 64 0 8 0 rtmask 32 5 0 5 2 2 0 1 0 8 0 vnodes 216 3903 0 0 217 0 217 217 0 8 0 namei 1024 17530 0 17529 4 3 1 1 0 8 0 percpumem 16 111 0 60 1 0 1 1 0 8 0 pfiaddrpl 120 33 0 33 1 1 0 1 0 8 0 kstatmem 264 116 0 84 4 1 3 3 0 8 0 scsiplug 72 5 0 5 2 2 0 1 0 8 0 scxspl 216 26567 0 26567 12 10 2 8 1 8 2 plimitpl 152 386 0 369 1 0 1 1 0 8 0 sigapl 424 1369 0 1324 6 0 6 6 0 8 0 knotepl 120 521 0 0 16 0 16 16 0 8 0 kqueuepl 224 454 0 444 9 7 2 5 0 8 1 pipepl 344 165 0 138 3 0 3 3 0 8 0 fdescpl 528 1347 0 1320 3 0 3 3 0 8 0 filepl 160 8959 0 8746 27 12 15 19 0 8 3 lockfpl 104 644 0 642 4 3 1 4 0 8 0 lockfspl 48 132 0 130 1 0 1 1 0 8 0 sessionpl 144 32 0 23 1 0 1 1 0 8 0 pgrppl 48 216 0 199 1 0 1 1 0 8 0 ucredpl 104 1343 0 1329 1 0 1 1 0 8 0 zombiepl 144 1415 0 1409 2 1 1 1 0 8 0 processpl 1232 1369 0 1324 5 0 5 5 0 8 0 procpl 664 2990 0 2943 6 0 6 6 0 8 0 sosppl 168 3 0 3 2 2 0 1 0 8 0 sockpl 752 2048 0 2016 30 17 13 14 0 8 8 mcl64k 65536 6 0 0 1 0 1 1 0 8 0 mcl16k 16384 1 0 0 1 0 1 1 0 8 0 mcl12k 12288 1 0 0 1 0 1 1 0 8 0 mcl9k 9216 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 3 0 0 1 0 1 1 0 8 0 mcl4k 4096 114 0 0 15 0 15 15 0 8 0 mcl2k2 2112 1 0 0 1 0 1 1 0 8 0 mcl2k 2048 30 0 0 4 0 4 4 0 8 0 mtagpl 96 2 0 0 1 0 1 1 0 8 0 mbufpl 256 204 0 0 12 0 12 12 0 8 0 bufpl 280 10415 0 4272 440 0 440 440 0 8 0 anonpl 32 14161 0 0 115 0 115 115 0 246 0 amapchunkpl 152 38633 0 38180 52 21 31 36 0 158 5 amappl16 200 4498 0 4463 43 30 13 28 0 8 6 amappl15 192 3 0 3 2 2 0 1 0 8 0 amappl14 184 129 0 117 1 0 1 1 0 8 0 amappl13 176 1 0 1 1 1 0 1 0 8 0 amappl12 168 2010 0 1983 3 1 2 2 0 8 0 amappl11 160 54 0 40 1 0 1 1 0 8 0 amappl10 152 71 0 70 1 0 1 1 0 8 0 amappl9 144 262 0 262 1 1 0 1 0 8 0 amappl8 136 21 0 18 1 0 1 1 0 8 0 amappl7 128 118 0 105 1 0 1 1 0 8 0 amappl6 120 198 0 194 1 0 1 1 0 8 0 amappl5 112 127 0 117 1 0 1 1 0 8 0 amappl4 104 324 0 306 1 0 1 1 0 8 0 amappl3 96 6601 0 6524 3 0 3 3 0 8 0 amappl2 88 1635 0 1558 2 0 2 2 0 8 0 amappl1 80 14175 0 13587 15 0 15 15 0 8 0 amappl 88 10448 0 10307 5 0 5 5 0 92 0 uvmvnodes 80 3903 0 0 80 0 80 80 0 8 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 dma512 512 1 0 1 1 1 0 1 0 8 0 dma256 256 6 0 6 1 1 0 1 0 8 0 dma128 128 254 0 254 2 2 0 1 0 8 0 dma64 64 7 0 7 2 2 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 60 0 5 1 0 1 1 0 8 0 uaddrrnd 24 1347 0 1320 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1347 0 1320 1 0 1 1 0 8 0 vmmpekpl 168 12824 0 12776 3 0 3 3 0 8 0 vmmpepl 168 92177 0 90394 122 23 99 112 0 357 3 vmsppl 488 1346 0 1320 6 1 5 5 0 8 0 rwobjpl 80 30450 0 25572 106 1 105 105 0 8 0 pdppl 4096 2702 0 2640 102 30 72 82 0 8 10 pvpl 32 23060 0 0 187 1 186 186 0 265 0 pmappl 256 1346 0 1320 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 295 0 47 8 0 8 8 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace ufs_lookup() at ufs_lookup+0x623 sys/ufs/ufs/ufs_lookup.c:279 VOP_LOOKUP(fffffd806ccfb2c0,ffff80002a320040,ffff80002a320070) at VOP_LOOKUP+0x6e sys/kern/vfs_vops.c:85 vfs_lookup(ffff80002a320010) at vfs_lookup+0x93a sys/kern/vfs_lookup.c:566 namei(ffff80002a320010) at namei+0x7ca sys/kern/vfs_lookup.c:250 vn_open(ffff80002a320010,30001,0) at vn_open+0x15a sys/kern/vfs_vnops.c:140 doopenat(ffff8000ffffca68,ffffff9c,7296e8023c70,30000,0,ffff80002a3201c0) at doopenat+0x35b sys/kern/vfs_syscalls.c:1138 syscall(ffff80002a320270) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80002a320270) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7296e8023770, count: -8 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffff8000299edff0) at x86_ipi_db+0x27 sys/arch/amd64/amd64/db_interface.c:394 x86_ipi_handler() at x86_ipi_handler+0xd9 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27 acpicpu_idle() at acpicpu_idle+0x457 sys/dev/acpi/acpicpu_x86.c:1224 sched_idle(ffff8000299edff0) at sched_idle+0x391 sys/kern/kern_sched.c:191 end trace frame: 0x0, count: 10 ddb{1}> trace x86_ipi_db(ffff8000299edff0) at x86_ipi_db+0x27 sys/arch/amd64/amd64/db_interface.c:394 x86_ipi_handler() at x86_ipi_handler+0xd9 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27 acpicpu_idle() at acpicpu_idle+0x457 sys/dev/acpi/acpicpu_x86.c:1224 sched_idle(ffff8000299edff0) at sched_idle+0x391 sys/kern/kern_sched.c:191 end trace frame: 0x0, count: -5