panic: bad dir Stopped at db_enter+0x25: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND *124545 35615 0 0x2000 0x4000000 0K syz-executor 277687 59323 0 0 0x4000000 1 syz-executor db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff832e5d00) at panic+0x1e5 sys/kern/subr_prf.c:198 ufs_lookup() at ufs_lookup+0x1eda VOP_LOOKUP(fffffd800b0395e8,ffff8000330134f8,ffff800033013528) at VOP_LOOKUP+0x6e sys/kern/vfs_vops.c:85 vfs_lookup(ffff8000330134c8) at vfs_lookup+0x93a sys/kern/vfs_lookup.c:566 namei(ffff8000330134c8) at namei+0x7ca sys/kern/vfs_lookup.c:250 sys_unveil(ffff800036027a18,ffff8000330136b0,ffff800033013600) at sys_unveil+0x329 sys/kern/vfs_syscalls.c:1009 syscall(ffff8000330136b0) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff8000330136b0) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xe949deb2360, count: 6 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: bad dir ddb{0}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff832e5d00) at panic+0x1e5 sys/kern/subr_prf.c:198 ufs_lookup() at ufs_lookup+0x1eda VOP_LOOKUP(fffffd800b0395e8,ffff8000330134f8,ffff800033013528) at VOP_LOOKUP+0x6e sys/kern/vfs_vops.c:85 vfs_lookup(ffff8000330134c8) at vfs_lookup+0x93a sys/kern/vfs_lookup.c:566 namei(ffff8000330134c8) at namei+0x7ca sys/kern/vfs_lookup.c:250 sys_unveil(ffff800036027a18,ffff8000330136b0,ffff800033013600) at sys_unveil+0x329 sys/kern/vfs_syscalls.c:1009 syscall(ffff8000330136b0) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff8000330136b0) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xe949deb2360, count: -9 ddb{0}> show registers rdi 0 rsi 0x1 rbp 0xffff800033013160 rbx 0xffffffff8380eddf cpu_info_full_primary+0x2ddf rdx 0xffff800001479840 rcx 0xffff800036027a18 rax 0xffffffff8380dff0 cpu_info_full_primary+0x1ff0 r8 0x101010101010101 r9 0x8080808080808080 r10 0x6b034f91e2515aac r11 0x780d62ca8acff94d r12 0xffffffff8380ebe0 cpu_info_full_primary+0x2be0 r13 0 r14 0 r15 0x1 rip 0xffffffff82fcb0c5 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff800033013150 ss 0 db_enter+0x25: addq $0x8,%rsp ddb{0}> show proc PROC (syz-executor) tid=124545 pid=35615 tcnt=2 stat=onproc flags process=2000 proc=4000000 runpri=17, usrpri=86, slppri=17, nice=20 wchan=0x0, wmesg=, ps_single=0xffff800036027a18 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff800036027cb0,0xffff800036026d30 process=0xffff8000360293a0 user=0xffff80003300e000, vmspace=0xfffffd8068f315d8 estcpu=36, cpticks=2, pctcpu=0.0, user=0, sys=2, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 2619 294209 20747 0 2 0 syz-executor 2619 276238 20747 0 3 0x4000080 fsleep syz-executor 29612 429090 444 0 3 0x80 nanoslp syz-executor 29612 163398 444 0 3 0x4000080 fsleep syz-executor 29612 263523 444 0 3 0x4000080 fifow syz-executor 35615 441882 76653 0 4 0x82000 syz-executor *35615 124545 76653 0 7 0x4002000 syz-executor 59323 414200 51103 0 2 0 syz-executor 59323 277687 51103 0 7 0x4000000 syz-executor 59323 43998 51103 0 3 0x4000080 fsleep syz-executor 56655 53774 0 0 3 0x14200 acct acct 30376 307410 11186 0 2 0xc80 syz-executor 30376 192374 11186 0 2 0x4000c80 syz-executor 30376 93643 11186 0 3 0x4000080 fsleep syz-executor 30376 386260 11186 0 3 0x4000080 fsleep syz-executor 73862 515295 87565 0 2 0x2 syz-executor 9540 442020 0 0 3 0x14200 bored sosplice 11186 504411 87565 0 2 0xc82 syz-executor 9743 471145 87565 0 2 0x2 syz-executor 20747 281496 87565 0 3 0x82 nanoslp syz-executor 76653 166593 87565 0 2 0xc82 syz-executor 444 508402 87565 0 3 0x82 nanoslp syz-executor 39534 109823 87565 0 3 0x82 nanoslp syz-executor 51103 227322 87565 0 2 0xc82 syz-executor 87565 209874 22616 0 3 0x82 kqread syz-executor 22616 184601 36232 0 3 0x10008a sigsusp ksh 36232 142684 71802 0 3 0x98 kqread sshd-session 71802 335249 63085 0 3 0x92 kqread sshd-session 89781 323205 1 0 3 0x100083 ttyin getty 63085 60572 1 0 3 0x88 kqread sshd 82736 95729 57227 74 3 0x1100092 bpf pflogd 57227 119673 1 0 3 0x80 sbwait pflogd 87776 488951 401 73 3 0x1100090 kqread syslogd 401 343316 1 0 3 0x100082 sbwait syslogd 81967 469613 1 0 3 0x100080 kqread resolvd 8125 394685 16210 77 3 0x100092 kqread dhcpleased 4031 17523 16210 77 3 0x100092 kqread dhcpleased 16210 197404 1 0 3 0x80 kqread dhcpleased 74150 364866 0 0 2 0x14200 smr 70106 82934 0 0 2 0x14200 zerothread 49148 432951 0 0 3 0x14200 aiodoned aiodoned 40445 236139 0 0 3 0x14200 syncer update 11603 250515 0 0 3 0x14200 cleaner cleaner 68548 468305 0 0 3 0x14200 reaper reaper 23570 82262 0 0 3 0x14200 pgdaemon pagedaemon 57749 436985 0 0 3 0x14200 bored viomb 60477 293838 0 0 3 0x40014200 acpi0 acpi0 22600 243841 0 0 3 0x40014200 idle1 49391 460353 0 0 3 0x14200 bored softnet7 37080 294059 0 0 3 0x14200 bored softnet6 95649 522840 0 0 3 0x14200 bored softnet5 63954 171020 0 0 3 0x14200 bored softnet4 68301 241912 0 0 3 0x14200 bored softnet3 56943 384242 0 0 3 0x14200 bored softnet2 27466 263404 0 0 3 0x14200 bored softnet1 51707 299151 0 0 3 0x14200 bored softnet0 3629 416274 0 0 3 0x14200 smrbar systqmp 35678 60738 0 0 3 0x14200 bored systq 89300 216953 0 0 3 0x14200 tmoslp softclockmp 137 493796 0 0 2 0x40014200 softclock 50439 84268 0 0 3 0x40014200 idle0 1 512758 0 0 3 0x82 wait init 0 0 -1 0 3 0x10010200 scheduler swapper ddb{0}> show all locks Process 35615 (syz-executor) thread 0xffff800036027a18 (124545) Process 73862 (syz-executor) thread 0xffff800031008d28 (515295) Process 9743 (syz-executor) thread 0xffff80002a2b94d8 (471145) Process 3629 (systqmp) thread 0xffff8000ffffe298 (416274) ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10244 11165K 11357K 166960K 12387 0 pcb 17 16K 18K 166960K 321 0 rtable 195 7K 8K 166960K 376 0 pf 35 17K 21K 166960K 94 0 ifaddr 41 7K 7K 166960K 70 0 ifgroup 53 2K 2K 166960K 96 0 sysctl 4 1K 9K 166960K 8 0 counters 68 36K 37K 166960K 116 0 ioctlops 0 0K 4K 166960K 1662 0 iov 0 0K 16K 166960K 105 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1497 94K 94K 166960K 2008 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 9K 166960K 11 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 33 0 dirhash 12 2K 3K 166960K 24 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 17 61K 240K 166960K 757 0 sigio 0 0K 0K 166960K 6 0 proc 72 115K 164K 166960K 640 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 157 0 in_multi 88 6K 7K 166960K 131 0 ether_multi 1 0K 0K 166960K 6 0 mrt 0 0K 0K 166960K 10 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 241 1076K 1076K 166960K 241 0 exec 0 0K 1K 166960K 434 0 fusefs mount 1 32K 32K 166960K 1 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 242 160K 177K 166960K 8535 0 UVM aobj 25 2K 4K 166960K 27 0 pinsyscall 42 84K 102K 166960K 1852 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 33 0 NDP 12 0K 2K 166960K 45 0 temp 53 8644K 8717K 166960K 31041 0 kqueue 14 22K 32K 166960K 149 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 120 138 0 134 3 2 1 3 0 8 0 rtentry 176 135 0 52 5 0 5 5 0 8 0 unpcb 144 525 0 500 4 0 4 4 0 8 3 syncache 336 7 0 7 2 1 1 1 0 8 1 tcpqe 32 3 0 3 1 1 0 1 0 8 0 tcpcb 736 219 0 213 7 5 2 4 0 8 1 arp 128 17 0 6 1 0 1 1 0 8 0 inpcb 328 956 0 945 17 7 10 15 0 8 8 nd6 144 21 0 4 1 0 1 1 0 8 0 pkpcb 40 3 0 3 2 1 1 1 0 8 1 kcovpl 48 9 0 1 1 0 1 1 0 8 0 mppekey 1024 1 0 1 1 0 1 1 0 8 1 ppxss 1192 20 0 19 2 1 1 1 0 8 0 pppxif 1504 1 0 1 1 0 1 1 0 8 1 pfstscr 40 2 0 1 2 1 1 1 0 8 0 pffrag 232 8 0 4 1 0 1 1 0 482 0 pffrnode 88 8 0 4 1 0 1 1 0 8 0 pffrent 40 13 0 9 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 pfrktable 1344 2 0 2 1 0 1 1 0 8 1 pftag 88 2 0 1 1 0 1 1 0 8 0 pfstitem 24 57 0 1 1 0 1 1 0 8 0 pfstkey 128 59 0 3 2 0 2 2 0 8 0 pfstate 384 57 0 2 6 0 6 6 0 8 0 pfrule 1344 29 0 24 2 1 1 2 0 8 0 rttmr 136 4 0 4 2 1 1 1 0 8 1 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 567 0 129 29 1 28 29 0 8 0 art_table 40 568 0 129 5 0 5 5 0 8 0 art_node 32 133 0 54 1 0 1 1 0 8 0 sysvmsgpl 40 7 0 3 1 0 1 1 0 8 0 semupl 112 1 0 1 1 1 0 1 0 8 0 semapl 112 28 0 18 1 0 1 1 0 8 0 shmpl 112 24 0 2 1 0 1 1 0 8 0 dirhash 1024 25 0 8 3 0 3 3 0 8 0 dino2pl 256 2701 0 1193 95 0 95 95 0 8 0 ffsino 296 2701 0 1193 117 0 117 117 0 8 0 nchpl 144 3754 0 2060 64 0 64 64 0 8 0 rtmask 32 3 0 3 2 2 0 1 0 8 0 uvmvnodes 80 3209 0 0 66 0 66 66 0 8 0 vnodes 216 3209 0 0 179 0 179 179 0 8 0 namei 1024 12670 0 12667 5 3 2 2 0 8 1 percpumem 16 73 0 24 1 0 1 1 0 8 0 kstatmem 264 56 0 30 3 1 2 3 0 8 0 scsiplug 72 2 0 2 2 2 0 1 0 8 0 scxspl 216 21130 0 21130 10 2 8 8 1 8 8 plimitpl 152 281 0 263 1 0 1 1 0 8 0 sigapl 424 1029 0 974 7 0 7 7 0 8 0 knotepl 120 316 0 0 10 0 10 10 0 8 0 kqueuepl 224 366 0 354 9 4 5 5 0 8 4 pipepl 344 147 0 120 3 0 3 3 0 8 0 fdescpl 528 1003 0 972 3 0 3 3 0 8 0 filepl 160 6019 0 5786 23 5 18 20 0 8 8 lockfpl 104 223 0 220 1 0 1 1 0 8 0 lockfspl 48 77 0 74 1 0 1 1 0 8 0 sessionpl 144 27 0 18 1 0 1 1 0 8 0 pgrppl 48 46 0 29 1 0 1 1 0 8 0 ucredpl 104 724 0 711 1 0 1 1 0 8 0 zombiepl 144 1256 0 1255 1 0 1 1 0 8 0 processpl 1248 1029 0 974 5 0 5 5 0 8 0 procpl 664 2079 0 2015 7 0 7 7 0 8 0 sosppl 168 4 0 4 1 0 1 1 0 8 1 sockpl 752 1675 0 1635 24 11 13 21 0 8 8 mcl64k 65536 4 0 0 1 0 1 1 0 8 0 mcl16k 16384 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 2 0 0 1 0 1 1 0 8 0 mcl4k 4096 127 0 0 16 0 16 16 0 8 0 mcl2k 2048 44 0 0 6 0 6 6 0 8 0 mtagpl 96 6 0 0 1 0 1 1 0 8 0 mbufpl 256 240 0 0 15 0 15 15 0 8 0 bufpl 280 8377 0 2234 440 0 440 440 0 8 0 anonpl 32 11431 0 0 93 0 93 93 0 246 0 amapchunkpl 152 27602 0 27059 39 8 31 31 0 158 5 amappl16 200 3532 0 3498 27 8 19 21 0 8 11 amappl15 192 4 0 4 1 1 0 1 0 8 0 amappl14 184 123 0 111 1 0 1 1 0 8 0 amappl13 176 7 0 7 1 1 0 1 0 8 0 amappl12 168 1667 0 1637 2 0 2 2 0 8 0 amappl11 160 49 0 35 1 0 1 1 0 8 0 amappl10 152 5 0 5 1 1 0 1 0 8 0 amappl9 144 264 0 264 1 1 0 1 0 8 0 amappl8 136 24 0 21 1 0 1 1 0 8 0 amappl7 128 119 0 106 1 0 1 1 0 8 0 amappl6 120 186 0 183 1 0 1 1 0 8 0 amappl5 112 197 0 188 1 0 1 1 0 8 0 amappl4 104 314 0 293 1 0 1 1 0 8 0 amappl3 96 5242 0 5132 4 0 4 4 0 8 0 amappl2 88 685 0 621 2 0 2 2 0 8 0 amappl1 80 11568 0 10965 15 0 15 15 0 8 0 amappl 88 7716 0 7546 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 26 0 2 1 0 1 1 0 8 0 uaddrrnd 24 1003 0 972 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1003 0 972 1 0 1 1 0 8 0 vmmpekpl 168 9956 0 9913 3 0 3 3 0 8 0 vmmpepl 168 70546 0 68577 109 3 106 106 0 357 2 vmsppl 488 1002 0 972 6 1 5 5 0 8 1 rwobjpl 80 24470 0 20286 94 2 92 92 0 8 1 pdppl 4096 2013 0 1944 106 33 73 85 0 8 4 pvpl 32 19827 0 0 161 1 160 160 0 265 0 pmappl 256 1002 0 972 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 295 0 45 8 0 8 8 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff832e5d00) at panic+0x1e5 sys/kern/subr_prf.c:198 ufs_lookup() at ufs_lookup+0x1eda VOP_LOOKUP(fffffd800b0395e8,ffff8000330134f8,ffff800033013528) at VOP_LOOKUP+0x6e sys/kern/vfs_vops.c:85 vfs_lookup(ffff8000330134c8) at vfs_lookup+0x93a sys/kern/vfs_lookup.c:566 namei(ffff8000330134c8) at namei+0x7ca sys/kern/vfs_lookup.c:250 sys_unveil(ffff800036027a18,ffff8000330136b0,ffff800033013600) at sys_unveil+0x329 sys/kern/vfs_syscalls.c:1009 syscall(ffff8000330136b0) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff8000330136b0) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xe949deb2360, count: -9 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 __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc vn_kqfilter(fffffd806a4314a8,fffffd8068d94ae0) at vn_kqfilter+0x35 sys/kern/vfs_vnops.c:626 kqueue_register(fffffd806efdc8c0,ffff80003c467420,57,ffff80002a2b74e0) at kqueue_register+0xcf8 filter_attach sys/kern/kern_event.c:1009 [inline] kqueue_register(fffffd806efdc8c0,ffff80003c467420,57,ffff80002a2b74e0) at kqueue_register+0xcf8 sys/kern/kern_event.c:1491 ppollregister_evts(ffff80002a2b74e0,ffff80003c467420,1,ffff8000014902b8,57) at ppollregister_evts+0xca sys/kern/sys_generic.c:1044 ppollregister(ffff80002a2b74e0,ffff800001490000,fe,ffff80003c46779c,ffff80003c467798) at ppollregister+0x32f sys/kern/sys_generic.c:1142 doppoll(ffff80002a2b74e0,200000000000,fe,ffff80003c467828,0,ffff80003c4678b0) at doppoll+0x214 sys/kern/sys_generic.c:959 sys_poll(ffff80002a2b74e0,ffff80003c467960,ffff80003c4678b0) at sys_poll+0xd8 sys/kern/sys_generic.c:-1 syscall(ffff80003c467960) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c467960) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x8982ba147d0, count: 3 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 __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc vn_kqfilter(fffffd806a4314a8,fffffd8068d94ae0) at vn_kqfilter+0x35 sys/kern/vfs_vnops.c:626 kqueue_register(fffffd806efdc8c0,ffff80003c467420,57,ffff80002a2b74e0) at kqueue_register+0xcf8 filter_attach sys/kern/kern_event.c:1009 [inline] kqueue_register(fffffd806efdc8c0,ffff80003c467420,57,ffff80002a2b74e0) at kqueue_register+0xcf8 sys/kern/kern_event.c:1491 ppollregister_evts(ffff80002a2b74e0,ffff80003c467420,1,ffff8000014902b8,57) at ppollregister_evts+0xca sys/kern/sys_generic.c:1044 ppollregister(ffff80002a2b74e0,ffff800001490000,fe,ffff80003c46779c,ffff80003c467798) at ppollregister+0x32f sys/kern/sys_generic.c:1142 doppoll(ffff80002a2b74e0,200000000000,fe,ffff80003c467828,0,ffff80003c4678b0) at doppoll+0x214 sys/kern/sys_generic.c:959 sys_poll(ffff80002a2b74e0,ffff80003c467960,ffff80003c4678b0) at sys_poll+0xd8 sys/kern/sys_generic.c:-1 syscall(ffff80003c467960) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c467960) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x8982ba147d0, count: -12