uvm_fault(0xffffffff82d8afc8, 0xffff80001133f004, 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 *291609 45282 0 0x2 0 0K syz-executor.6 ufs_lookup() at ufs_lookup+0x4ce sys/ufs/ufs/ufs_lookup.c:281 VOP_LOOKUP(fffffd805e720a20,ffff80002753f058,ffff80002753f088) at VOP_LOOKUP+0x5c sys/kern/vfs_vops.c:85 vfs_lookup(ffff80002753f028) at vfs_lookup+0x6e2 sys/kern/vfs_lookup.c:566 namei(ffff80002753f028) at namei+0x55a sys/kern/vfs_lookup.c:250 dounlinkat(ffff8000212a5a90,ffffff9c,76c8802787d0,8) at dounlinkat+0x9d sys/kern/vfs_syscalls.c:1847 syscall(ffff80002753f200) at syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline] syscall(ffff80002753f200) at syscall+0x5e2 sys/arch/amd64/amd64/trap.c:623 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x76c8802787c0, 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(0xffffffff82d8afc8, 0xffff80001133f004, 0, 1) -> d ddb{0}> trace ufs_lookup() at ufs_lookup+0x4ce sys/ufs/ufs/ufs_lookup.c:281 VOP_LOOKUP(fffffd805e720a20,ffff80002753f058,ffff80002753f088) at VOP_LOOKUP+0x5c sys/kern/vfs_vops.c:85 vfs_lookup(ffff80002753f028) at vfs_lookup+0x6e2 sys/kern/vfs_lookup.c:566 namei(ffff80002753f028) at namei+0x55a sys/kern/vfs_lookup.c:250 dounlinkat(ffff8000212a5a90,ffffff9c,76c8802787d0,8) at dounlinkat+0x9d sys/kern/vfs_syscalls.c:1847 syscall(ffff80002753f200) at syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline] syscall(ffff80002753f200) at syscall+0x5e2 sys/arch/amd64/amd64/trap.c:623 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x76c8802787c0, count: -7 ddb{0}> show registers rdi 0 rsi 0 rbp 0xffff80002753ee60 rbx 0 rdx 0 rcx 0xffffffff rax 0xfffffd80651e7a30 r8 0xffffffffffffffff r9 0xfffffd807f7d7478 r10 0xf605f17070148aac r11 0x32f6642629b85965 r12 0 r13 0 r14 0 r15 0xffff80001133f000 rip 0xffffffff8270491e ufs_lookup+0x4ce cs 0x8 rflags 0x10202 __ALIGN_SIZE+0xf202 rsp 0xffff80002753ed60 ss 0x10 ufs_lookup+0x4ce: movzwl 0x4(%r15,%r13,1),%ebx ddb{0}> show proc PROC (syz-executor.6) tid=291609 pid=45282 tcnt=1 stat=onproc flags process=2 proc=0 runpri=81, usrpri=81, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 forw=0xffffffffffffffff, list=0xffff8000212a47f8,0xffff80002121b550 process=0xffff8000fffee5d0 user=0xffff80002753a000, vmspace=0xfffffd8065fc6a18 estcpu=36, cpticks=1, pctcpu=0.0, user=0, sys=1, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 28136 170842 46219 0 2 0 syz-executor.3 28136 49192 46219 0 3 0x4000080 netio syz-executor.3 28136 306741 46219 0 3 0x4000080 netio syz-executor.3 28136 290930 46219 0 2 0x4000000 syz-executor.3 90991 52433 14825 0 3 0x80 nanoslp syz-executor.7 90991 477382 14825 0 3 0x4000080 lockf syz-executor.7 90991 158320 14825 0 3 0x4000080 lockf syz-executor.7 90991 26968 14825 0 3 0x4000080 fsleep syz-executor.7 5966 316890 52378 0 2 0 syz-executor.1 5966 69772 52378 0 3 0x4000080 fifor syz-executor.1 5966 216402 52378 0 3 0x4000080 lockf syz-executor.1 5966 447706 52378 0 3 0x4000080 fsleep syz-executor.1 14825 92608 86778 0 3 0x82 nanoslp syz-executor.7 *45282 291609 86778 0 7 0x2 syz-executor.6 92302 322178 0 0 3 0x14200 acct acct 66352 407089 86778 0 3 0x82 piperd syz-executor.0 34434 103159 86778 0 3 0x82 piperd syz-executor.4 72887 167879 1 0 3 0x100083 ttyin getty 46219 377785 86778 0 3 0x82 nanoslp syz-executor.3 94781 461246 86778 0 3 0x82 piperd syz-executor.5 52378 28214 86778 0 3 0x82 nanoslp syz-executor.1 7329 369553 86778 0 3 0x82 piperd syz-executor.2 49881 307877 0 0 3 0x14200 bored sosplice 86778 418220 72592 0 3 0x2000082 thrsleep syz-fuzzer 86778 220423 72592 0 3 0x6000082 nanoslp syz-fuzzer 86778 410286 72592 0 3 0x6000082 wait syz-fuzzer 86778 263640 72592 0 3 0x6000082 wait syz-fuzzer 86778 433017 72592 0 3 0x6000082 thrsleep syz-fuzzer 86778 320170 72592 0 3 0x6000082 thrsleep syz-fuzzer 86778 379064 72592 0 3 0x6000082 wait syz-fuzzer 86778 282765 72592 0 3 0x6000082 thrsleep syz-fuzzer 86778 362037 72592 0 3 0x6000082 wait syz-fuzzer 86778 475658 72592 0 3 0x6000082 thrsleep syz-fuzzer 86778 153444 72592 0 3 0x6000082 thrsleep syz-fuzzer 86778 273994 72592 0 3 0x6000082 thrsleep syz-fuzzer 86778 20614 72592 0 3 0x6000082 wait syz-fuzzer 86778 242582 72592 0 3 0x6000082 kqread syz-fuzzer 86778 177535 72592 0 3 0x6000082 wait syz-fuzzer 86778 129249 72592 0 3 0x6000082 wait syz-fuzzer 86778 438813 72592 0 3 0x6000082 wait syz-fuzzer 72592 86704 49884 0 3 0x10008a sigsusp ksh 49884 244822 44344 0 3 0x9a kqread sshd 44344 82306 1 0 3 0x88 kqread sshd 42089 212676 27157 74 3 0x1100092 bpf pflogd 27157 144018 1 0 3 0x80 netio pflogd 63281 70249 2165 73 3 0x1100090 kqread syslogd 2165 231733 1 0 3 0x100082 netio syslogd 88421 93508 1 0 3 0x100080 kqread resolvd 22618 506626 63444 77 3 0x100092 kqread dhcpleased 57185 471008 63444 77 3 0x100092 kqread dhcpleased 63444 119678 1 0 3 0x80 kqread dhcpleased 20862 57214 0 0 3 0x14200 bored smr 11675 117623 0 0 2 0x14200 zerothread 97734 422289 0 0 3 0x14200 aiodoned aiodoned 11158 234762 0 0 3 0x14200 syncer update 48156 242117 0 0 3 0x14200 cleaner cleaner 91638 411984 0 0 3 0x14200 reaper reaper 21281 491877 0 0 3 0x14200 pgdaemon pagedaemon 34746 230274 0 0 3 0x14200 bored viomb 40987 97356 0 0 3 0x40014200 acpi0 acpi0 44554 185994 0 0 7 0x40014200 idle1 54327 149886 0 0 3 0x14200 bored softnet3 36304 54434 0 0 3 0x14200 bored softnet2 37420 155675 0 0 3 0x14200 bored softnet1 43947 341559 0 0 3 0x14200 bored softnet0 31445 344367 0 0 3 0x14200 bored systqmp 51684 358628 0 0 3 0x14200 bored systq 48868 322145 0 0 3 0x14200 tmoslp softclockmp 38595 198055 0 0 3 0x40014200 tmoslp softclock 35479 233211 0 0 3 0x40014200 idle0 1 344355 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 45282 (syz-executor.6) thread 0xffff8000212a5a90 (291609) ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10236 6519K 7210K 78643K 28703 0 pcb 13 16K 18K 78643K 1117 0 rtable 245 7K 7K 78643K 1944 0 pf 37 10K 10K 78643K 320 0 ifaddr 47 17K 18K 78643K 263 0 ifgroup 64 2K 2K 78643K 498 0 sysctl 3 0K 2K 78643K 9 0 counters 64 36K 36K 78643K 302 0 ioctlops 0 0K 4K 78643K 3140 0 iov 2 24K 24K 78643K 1808 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 4 0 vnodes 1567 98K 98K 78643K 11044 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 9K 78643K 239 0 VM map 2 1K 1K 78643K 2 0 sem 12 0K 0K 78643K 4489 0 dirhash 12 2K 2K 78643K 135 0 ACPI 1697 195K 286K 78643K 12548 0 file desc 13 45K 89K 78643K 18833 0 sigio 0 0K 0K 78643K 589 0 proc 70 91K 127K 78643K 2476 0 subproc 104 6K 6K 78643K 497 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 652 0 in_multi 99 7K 7K 78643K 579 0 ether_multi 1 0K 0K 78643K 12 0 mrt 1 0K 0K 78643K 13 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 235 1049K 1049K 78643K 235 0 exec 0 0K 1K 78643K 3223 0 pfkey data 0 0K 0K 78643K 1 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 668 899K 915K 78643K 182257 0 UVM aobj 131 4K 4K 78643K 131 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 513 0 NDP 14 0K 1K 78643K 207 0 temp 76 5944K 6052K 78643K 160444 0 kqueue 12 18K 30K 78643K 1448 0 SYN cache 2 1632K 1640K 78643K 4 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 120 626 0 623 4 3 1 3 0 8 0 rtentry 112 501 0 387 4 0 4 4 0 8 0 unpcb 144 19740 0 19721 185 182 3 11 0 8 2 syncache 304 118 0 118 25 25 0 1 0 8 0 sackhl 24 1 0 1 1 1 0 1 0 8 0 tcpqe 32 131 0 131 22 22 0 1 0 8 0 tcpcb 808 5376 0 5364 166 163 3 15 0 8 0 arp 120 82 0 64 1 0 1 1 0 8 0 inpcb 368 10396 0 10381 200 197 3 14 0 8 0 nd6 136 128 0 100 2 0 2 2 0 8 0 pkpcb 40 87 0 87 7 7 0 1 0 8 0 kcovpl 48 37 0 29 1 0 1 1 0 8 0 ppxss 1256 38 0 38 13 13 0 1 0 8 0 pffrag 232 165 0 164 5 4 1 1 0 482 0 pffrnode 88 165 0 164 5 4 1 1 0 8 0 pffrent 40 505 0 504 5 4 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 24 425 0 392 1 0 1 1 0 8 0 pfstkey 128 425 0 392 3 1 2 2 0 8 0 pfstate 376 425 0 392 15 11 4 5 0 8 0 pfrule 1344 21 0 16 2 1 1 2 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 1842 0 1369 35 4 31 31 0 8 0 art_table 32 1843 0 1369 4 0 4 4 0 8 0 art_node 16 452 0 348 1 0 1 1 0 8 0 sysvmsgpl 40 43 0 35 1 0 1 1 0 8 0 semupl 112 3 0 3 1 1 0 1 0 8 0 semapl 112 4487 0 4477 1 0 1 1 0 8 0 shmpl 112 128 0 0 4 0 4 4 0 8 0 dirhash 1024 99 0 82 3 0 3 3 0 8 0 dino2pl 256 31999 0 30410 100 0 100 100 0 8 0 ffsino 272 31999 0 30410 107 0 107 107 0 8 0 nchpl 144 61347 0 60791 64 40 24 64 0 8 0 uvmvnodes 80 7751 0 0 159 0 159 159 0 8 0 vnodes 216 7751 0 0 431 0 431 431 0 8 0 namei 1024 216703 0 216702 12 11 1 2 0 8 0 percpumem 16 164 0 119 1 0 1 1 0 8 0 vcpupl 2048 505 0 0 64 0 64 64 0 8 0 vmpool 696 536 0 31 51 4 47 47 0 8 1 kstatmem 264 266 0 238 3 0 3 3 0 8 0 scxspl 216 182198 0 182198 40 39 1 8 1 8 1 plimitpl 152 1669 0 1653 1 0 1 1 0 8 0 sigapl 424 19323 0 19277 10 2 8 8 0 8 1 futexpl 64 186153 0 186151 14 13 1 1 0 8 0 knotepl 120 1217 0 0 20 2 18 19 0 8 0 kqueuepl 216 3961 0 3953 70 69 1 8 0 8 0 pipepl 320 3398 0 3370 102 96 6 14 0 8 3 fdescpl 496 19081 0 19055 5 1 4 5 0 8 0 filepl 152 135253 0 134939 234 219 15 23 0 8 2 lockfpl 104 10397 0 10390 11 10 1 4 0 8 0 lockfspl 48 3580 0 3576 1 0 1 1 0 8 0 sessionpl 144 62 0 45 1 0 1 1 0 8 0 pgrppl 48 179 0 162 1 0 1 1 0 8 0 ucredpl 104 14212 0 14189 1 0 1 1 0 8 0 zombiepl 144 19277 0 19277 6 5 1 1 0 8 1 processpl 1072 19323 0 19277 5 0 5 5 0 8 0 procpl 680 50818 0 50747 21 12 9 10 0 8 0 sosppl 168 136 0 136 19 19 0 1 0 8 0 sockpl 488 30981 0 30944 786 773 13 38 0 8 7 mcl64k 65536 26 0 0 4 1 3 3 0 8 0 mcl16k 16384 18 0 0 3 0 3 3 0 8 0 mcl12k 12288 17 0 0 2 0 2 2 0 8 0 mcl9k 9216 7 0 0 1 0 1 1 0 8 0 mcl8k 8192 25 0 0 3 0 3 3 0 8 0 mcl4k 4096 33 0 0 4 1 3 3 0 8 0 mcl2k2 2112 8 0 0 1 0 1 1 0 8 0 mcl2k 2048 451 0 0 38 6 32 38 0 8 0 mtagpl 96 1010 0 0 20 0 20 20 0 8 0 mbufpl 256 2858 0 0 134 0 134 134 0 8 0 bufpl 288 41568 0 33815 554 0 554 554 0 8 0 anonpl 24 1746777 0 1732412 244 128 116 130 0 186 0 amapchunkpl 152 583507 0 582619 151 111 40 51 0 158 1 amappl16 200 30466 0 29867 147 115 32 45 0 8 0 amappl15 192 18 0 18 2 2 0 1 0 8 0 amappl14 184 261 0 245 2 1 1 2 0 8 0 amappl13 176 14 0 13 1 0 1 1 0 8 0 amappl12 168 20219 0 20187 4 2 2 3 0 8 0 amappl11 160 53 0 39 1 0 1 1 0 8 0 amappl10 152 72 0 53 1 0 1 1 0 8 0 amappl9 144 379 0 378 1 0 1 1 0 8 0 amappl8 136 992 0 811 7 0 7 7 0 8 0 amappl7 128 132 0 115 2 0 2 2 0 8 0 amappl6 120 551 0 526 2 1 1 2 0 8 0 amappl5 112 652 0 640 1 0 1 1 0 8 0 amappl4 104 1129 0 1072 2 0 2 2 0 8 0 amappl3 96 113403 0 113323 6 3 3 3 0 8 0 amappl2 88 20109 0 20026 3 0 3 3 0 8 0 amappl1 80 78372 0 77824 24 12 12 23 0 8 0 amappl 88 180894 0 180568 11 2 9 9 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 72 130 0 0 3 0 3 3 0 8 0 uaddrrnd 24 19617 0 19086 4 0 4 4 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 19617 0 19086 4 0 4 4 0 8 0 vmmpekpl 168 127982 0 127859 7 1 6 6 0 8 0 vmmpepl 168 1112417 0 1109364 447 277 170 170 0 357 22 vmsppl 464 19616 0 19086 70 3 67 68 0 8 0 rwobjpl 56 264901 0 255099 158 19 139 140 0 8 0 pdppl 4096 39242 0 38677 1126 551 575 577 0 8 10 pvpl 32 5298783 0 5278730 648 449 199 339 0 265 0 pmappl 248 19616 0 19086 35 1 34 34 0 8 0 extentpl 40 56 0 38 1 0 1 1 0 8 0 phpool 112 2591 0 961 47 0 47 47 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(fffffd805e720a20,ffff80002753f058,ffff80002753f088) at VOP_LOOKUP+0x5c sys/kern/vfs_vops.c:85 vfs_lookup(ffff80002753f028) at vfs_lookup+0x6e2 sys/kern/vfs_lookup.c:566 namei(ffff80002753f028) at namei+0x55a sys/kern/vfs_lookup.c:250 dounlinkat(ffff8000212a5a90,ffffff9c,76c8802787d0,8) at dounlinkat+0x9d sys/kern/vfs_syscalls.c:1847 syscall(ffff80002753f200) at syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline] syscall(ffff80002753f200) at syscall+0x5e2 sys/arch/amd64/amd64/trap.c:623 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x76c8802787c0, count: -7 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x1e: addq $0x8,%rsp x86_ipi_db(ffff800020d48ff0) at x86_ipi_db+0x1e 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+0x27 acpicpu_idle() at acpicpu_idle+0x312 sys/dev/acpi/acpicpu.c:1206 sched_idle(ffff800020d48ff0) at sched_idle+0x41e sys/kern/kern_sched.c:191 end trace frame: 0x0, count: 10 ddb{1}> trace x86_ipi_db(ffff800020d48ff0) at x86_ipi_db+0x1e 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+0x27 acpicpu_idle() at acpicpu_idle+0x312 sys/dev/acpi/acpicpu.c:1206 sched_idle(ffff800020d48ff0) at sched_idle+0x41e sys/kern/kern_sched.c:191 end trace frame: 0x0, count: -5