kern.securelevel: 0 -> 1 creating runtime link editor directory cache. preserving editor files. starting network daemons: sshd. starting local daemons:. Wed Oct 6 11:03:51 PDT 2021 OpenBSD/amd64 (ci-openbsd-main-0.c.syzkaller.internal) (tty00) Warning: Permanently added '10.128.0.157' (ED25519) to the list of known hosts. executing program login: panic: rw_enter: dklk locking against myself Stopped at db_enter+0x18: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND *407192 66264 0 0x2 0x4000000 0 syz-executor1941 db_enter() at db_enter+0x18 panic(ffffffff8247f6c9) at panic+0x161 rw_enter(ffff8000006aa058,11) at rw_enter+0x36f vndopen(2902,3,2000,ffff8000ffff87e8) at vndopen+0x8d spec_open(ffff80002169a888) at spec_open+0x3c8 VOP_OPEN(fffffd806e3ff848,3,fffffd807f7d8ba0,ffff8000ffff87e8) at VOP_OPEN+0x6c vn_open(ffff80002169ab20,3,0) at vn_open+0x467 vndioctl(2902,c0384600,ffff80002169ae40,81,ffff8000ffff87e8) at vndioctl+0xa07 VOP_IOCTL(fffffd806e3ff848,c0384600,ffff80002169ae40,81,fffffd807f7d8ba0,ffff8000ffff87e8) at VOP_IOCTL+0x8d vn_ioctl(fffffd807320eb48,c0384600,ffff80002169ae40,ffff8000ffff87e8) at vn_ioctl+0xb5 sys_ioctl(ffff8000ffff87e8,ffff80002169af58,ffff80002169afb0) at sys_ioctl+0x49e syscall(ffff80002169b020) at syscall+0x571 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xd579302b000, count: 2 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> ddb> set $lines = 0 ddb> set $maxwidth = 0 ddb> show panic *cpu0: rw_enter: dklk locking against myself ddb> trace db_enter() at db_enter+0x18 panic(ffffffff8247f6c9) at panic+0x161 rw_enter(ffff8000006aa058,11) at rw_enter+0x36f vndopen(2902,3,2000,ffff8000ffff87e8) at vndopen+0x8d spec_open(ffff80002169a888) at spec_open+0x3c8 VOP_OPEN(fffffd806e3ff848,3,fffffd807f7d8ba0,ffff8000ffff87e8) at VOP_OPEN+0x6c vn_open(ffff80002169ab20,3,0) at vn_open+0x467 vndioctl(2902,c0384600,ffff80002169ae40,81,ffff8000ffff87e8) at vndioctl+0xa07 VOP_IOCTL(fffffd806e3ff848,c0384600,ffff80002169ae40,81,fffffd807f7d8ba0,ffff8000ffff87e8) at VOP_IOCTL+0x8d vn_ioctl(fffffd807320eb48,c0384600,ffff80002169ae40,ffff8000ffff87e8) at vn_ioctl+0xb5 sys_ioctl(ffff8000ffff87e8,ffff80002169af58,ffff80002169afb0) at sys_ioctl+0x49e syscall(ffff80002169b020) at syscall+0x571 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xd579302b000, count: -13 ddb> show registers rdi 0 rsi 0x1 rbp 0xffff80002169a650 rbx 0x4 rdx 0x8b rcx 0x2 rax 0x2d r8 0xffffffff816b3695 kprintf+0x145 r9 0x1 r10 0xfe16f6493c46bd6e r11 0xc4be0aa87f9f6cd8 r12 0 r13 0xffff8000ffff87ec r14 0 r15 0x1 rip 0xffffffff81036b58 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff80002169a640 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb> show proc PROC (syz-executor1941) pid=407192 stat=onproc flags process=2 proc=4000000 pri=32, usrpri=53, nice=20 forw=0xffffffffffffffff, list=0xffff8000ffff8a88,0xffffffff829337f0 process=0xffff8000ffff73c0 user=0xffff800021696000, vmspace=0xfffffd807f00b550 estcpu=3, cpticks=0, pctcpu=0.0 user=0, sys=0, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 66264 318256 33013 0 2 0x2 syz-executor1941 *66264 407192 33013 0 7 0x4000002 syz-executor1941 33013 518112 67422 0 3 0x10008a sigsusp ksh 67422 396821 27718 0 3 0x9a select sshd 57434 439925 1 0 3 0x100083 ttyin getty 27718 100963 1 0 3 0x88 select sshd 15252 220668 96216 73 3 0x100090 kqread syslogd 96216 75708 1 0 3 0x100082 netio syslogd 93030 97484 1 0 3 0x100080 kqread resolvd 77844 23199 53652 77 3 0x100092 kqread dhcpleased 41901 367874 53652 77 3 0x100092 kqread dhcpleased 53652 368385 1 0 3 0x80 kqread dhcpleased 70662 351610 0 0 3 0x14200 bored smr 18873 340960 0 0 2 0x14200 zerothread 57925 492904 0 0 3 0x14200 aiodoned aiodoned 93501 391128 0 0 3 0x14200 syncer update 7236 440225 0 0 3 0x14200 cleaner cleaner 37910 43541 0 0 3 0x14200 reaper reaper 86593 417391 0 0 3 0x14200 pgdaemon pagedaemon 43909 376950 0 0 3 0x14200 bored crynlk 34151 242648 0 0 3 0x14200 bored crypto 97091 478150 0 0 3 0x14200 bored viomb 93393 418114 0 0 3 0x40014200 acpi0 acpi0 63556 495266 0 0 3 0x14200 bored softnet 23082 73247 0 0 3 0x14200 bored systqmp 30919 153874 0 0 3 0x14200 bored systq 20378 165207 0 0 3 0x40014200 bored softclock 22239 330260 0 0 3 0x40014200 idle0 1 397759 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb> show all locks No such command ddb> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10093 6342K 6373K 78643K 11183 0 pcb 13 8K 8K 78643K 13 0 rtable 62 2K 2K 78643K 114 0 ifaddr 24 7K 7K 78643K 24 0 counters 19 16K 16K 78643K 19 0 ioctlops 0 0K 2K 78643K 25 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 4 0 vnodes 1182 74K 74K 78643K 1187 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 1K 78643K 2 0 VM map 2 0K 0K 78643K 2 0 sem 2 0K 0K 78643K 2 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12598 0 file desc 1 0K 0K 78643K 1 0 proc 55 54K 55K 78643K 222 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 in_multi 11 0K 0K 78643K 11 0 ether_multi 1 0K 0K 78643K 1 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 19 95K 95K 78643K 19 0 exec 0 0K 2K 78643K 325 0 pagedep 1 8K 8K 78643K 1 0 inodedep 1 32K 32K 78643K 1 0 newblk 1 0K 0K 78643K 1 0 VM swap 7 26K 26K 78643K 7 0 UVM amap 83 3K 5K 78643K 1519 0 UVM aobj 3 2K 2K 78643K 3 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 NDP 3 0K 0K 78643K 3 0 temp 18 4189K 4253K 78643K 1787 0 kqueue 9 12K 12K 78643K 9 0 SYN cache 2 16K 16K 78643K 2 0 ddb> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle rtpcb 120 20 0 17 1 0 1 1 0 8 0 rtentry 112 23 0 1 1 0 1 1 0 8 0 unpcb 120 33 0 20 1 0 1 1 0 8 0 syncache 296 5 0 5 2 1 1 1 0 8 1 tcpcb 736 8 0 5 1 0 1 1 0 8 0 arp 88 2 0 0 1 0 1 1 0 8 0 inpcb 304 25 0 19 1 0 1 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 96 0 0 6 0 6 6 0 8 0 art_table 32 97 0 0 1 0 1 1 0 8 0 art_node 16 22 0 2 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 1405 0 22 87 0 87 87 0 8 0 ffsino 240 1405 0 22 82 0 82 82 0 8 0 nchpl 144 1581 0 39 58 0 58 58 0 8 0 uvmvnodes 72 1414 0 0 26 0 26 26 0 8 0 vnodes 224 1414 0 0 84 0 84 84 0 8 0 namei 1024 3913 0 3913 2 1 1 1 0 8 1 scxspl 216 3715 0 3715 10 9 1 8 0 8 1 plimitpl 152 15 0 9 1 0 1 1 0 8 0 sigapl 424 235 0 207 4 0 4 4 0 8 0 futexpl 56 5 0 5 1 0 1 1 0 8 1 knotepl 112 121 0 98 1 0 1 1 0 8 0 kqueuepl 184 5 0 0 1 0 1 1 0 8 0 pipepl 304 65 0 62 2 1 1 1 0 8 0 fdescpl 432 220 0 207 2 0 2 2 0 8 0 filepl 120 969 0 913 2 0 2 2 0 8 0 lockfpl 104 6 0 4 1 0 1 1 0 8 0 lockfspl 48 4 0 2 1 0 1 1 0 8 0 sessionpl 144 17 0 9 1 0 1 1 0 8 0 pgrppl 48 17 0 9 1 0 1 1 0 8 0 ucredpl 96 64 0 54 1 0 1 1 0 8 0 zombiepl 144 207 0 207 2 1 1 1 0 8 1 processpl 1008 235 0 207 4 0 4 4 0 8 0 procpl 672 236 0 207 3 0 3 3 0 8 0 sockpl 448 78 0 56 3 0 3 3 0 8 0 mcl8k 8192 9 0 9 2 1 1 1 0 8 1 mcl4k 4096 5 0 5 2 1 1 1 0 8 1 mcl2k 2048 7966 0 7928 9 2 7 8 0 8 1 mtagpl 96 3 0 3 1 1 0 1 0 8 0 mbufpl 256 13399 0 13322 9 2 7 8 0 8 0 bufpl 280 2117 0 87 145 0 145 145 0 8 0 anonpl 24 32556 0 30241 18 3 15 15 0 188 1 amapchunkpl 152 2894 0 2743 6 0 6 6 0 158 0 amappl16 200 28 0 26 2 1 1 1 0 8 0 amappl15 192 61 0 58 1 0 1 1 0 8 0 amappl13 176 16 0 15 2 1 1 1 0 8 0 amappl12 168 4 0 4 2 1 1 1 0 8 1 amappl11 160 54 0 40 1 0 1 1 0 8 0 amappl9 144 298 0 296 1 0 1 1 0 8 0 amappl8 136 260 0 257 1 0 1 1 0 8 0 amappl7 128 29 0 28 1 0 1 1 0 8 0 amappl6 120 31 0 27 1 0 1 1 0 8 0 amappl5 112 246 0 232 1 0 1 1 0 8 0 amappl4 104 484 0 463 1 0 1 1 0 8 0 amappl3 96 151 0 137 1 0 1 1 0 8 0 amappl2 88 278 0 246 1 0 1 1 0 8 0 amappl1 80 7079 0 6721 12 3 9 9 0 8 1 amappl 88 1290 0 1223 2 0 2 2 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 64 2 0 0 1 0 1 1 0 8 0 uaddrrnd 24 220 0 207 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 220 0 207 1 0 1 1 0 8 0 vmmpekpl 168 5762 0 5750 1 0 1 1 0 8 0 vmmpepl 168 21461 0 20654 42 4 38 38 0 357 2 vmsppl 272 219 0 207 2 1 1 2 0 8 0 rwobjpl 24 6687 0 6163 5 1 4 4 0 8 0 pdppl 4096 446 0 414 52 20 32 38 0 8 0 pvpl 32 105456 0 101402 41 6 35 35 0 265 2 pmappl 192 219 0 207 1 0 1 1 0 8 0 extentpl 40 58 0 40 1 0 1 1 0 8 0 phpool 112 264 0 30 7 0 7 7 0 8 0 ddb> machine ddbcpu 0 No such command ddb> trace db_enter() at db_enter+0x18 panic(ffffffff8247f6c9) at panic+0x161 rw_enter(ffff8000006aa058,11) at rw_enter+0x36f vndopen(2902,3,2000,ffff8000ffff87e8) at vndopen+0x8d spec_open(ffff80002169a888) at spec_open+0x3c8 VOP_OPEN(fffffd806e3ff848,3,fffffd807f7d8ba0,ffff8000ffff87e8) at VOP_OPEN+0x6c vn_open(ffff80002169ab20,3,0) at vn_open+0x467 vndioctl(2902,c0384600,ffff80002169ae40,81,ffff8000ffff87e8) at vndioctl+0xa07 VOP_IOCTL(fffffd806e3ff848,c0384600,ffff80002169ae40,81,fffffd807f7d8ba0,ffff8000ffff87e8) at VOP_IOCTL+0x8d vn_ioctl(fffffd807320eb48,c0384600,ffff80002169ae40,ffff8000ffff87e8) at vn_ioctl+0xb5 sys_ioctl(ffff8000ffff87e8,ffff80002169af58,ffff80002169afb0) at sys_ioctl+0x49e syscall(ffff80002169b020) at syscall+0x571 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xd579302b000, count: -13 ddb> machine ddbcpu 1 No such command ddb> trace db_enter() at db_enter+0x18 panic(ffffffff8247f6c9) at panic+0x161 rw_enter(ffff8000006aa058,11) at rw_enter+0x36f vndopen(2902,3,2000,ffff8000ffff87e8) at vndopen+0x8d spec_open(ffff80002169a888) at spec_open+0x3c8 VOP_OPEN(fffffd806e3ff848,3,fffffd807f7d8ba0,ffff8000ffff87e8) at VOP_OPEN+0x6c vn_open(ffff80002169ab20,3,0) at vn_open+0x467 vndioctl(2902,c0384600,ffff80002169ae40,81,ffff8000ffff87e8) at vndioctl+0xa07 VOP_IOCTL(fffffd806e3ff848,c0384600,ffff80002169ae40,81,fffffd807f7d8ba0,ffff8000ffff87e8) at VOP_IOCTL+0x8d vn_ioctl(fffffd807320eb48,c0384600,ffff80002169ae40,ffff8000ffff87e8) at vn_ioctl+0xb5 sys_ioctl(ffff8000ffff87e8,ffff80002169af58,ffff80002169afb0) at sys_ioctl+0x49e syscall(ffff80002169b020) at syscall+0x571 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xd579302b000, count: -13 ddb>