login: panic: vndioctl: null vp Stopped at db_enter+0x18: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND 393320 80133 0 0 0x4000000 1 syz-executor1231 *140312 70460 0 0 0x4000000 0K syz-executor1231 db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:440 panic(ffffffff824a2454) at panic+0x177 sys/kern/subr_prf.c:202 vndsetcred(2902,80384601,ffff80002123c3a0,1) at vndsetcred VOP_IOCTL(fffffd806e4f4ae8,80384601,ffff80002123c3a0,1,fffffd807f7d7660,ffff800021193268) at VOP_IOCTL+0x96 sys/kern/vfs_vops.c:264 vn_ioctl(fffffd806e587568,80384601,ffff80002123c3a0,ffff800021193268) at vn_ioctl+0xba sys/kern/vfs_vnops.c:531 sys_ioctl(ffff800021193268,ffff80002123c4b8,ffff80002123c510) at sys_ioctl+0x4a2 syscall(ffff80002123c580) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff80002123c580) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x171d74be4e0, 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: vndioctl: null vp ddb{0}> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:440 panic(ffffffff824a2454) at panic+0x177 sys/kern/subr_prf.c:202 vndsetcred(2902,80384601,ffff80002123c3a0,1) at vndsetcred VOP_IOCTL(fffffd806e4f4ae8,80384601,ffff80002123c3a0,1,fffffd807f7d7660,ffff800021193268) at VOP_IOCTL+0x96 sys/kern/vfs_vops.c:264 vn_ioctl(fffffd806e587568,80384601,ffff80002123c3a0,ffff800021193268) at vn_ioctl+0xba sys/kern/vfs_vnops.c:531 sys_ioctl(ffff800021193268,ffff80002123c4b8,ffff80002123c510) at sys_ioctl+0x4a2 syscall(ffff80002123c580) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff80002123c580) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x171d74be4e0, count: -8 ddb{0}> show registers rdi 0 rsi 0x1 rbp 0xffff80002123bae0 rbx 0xffffffff827e3bff cpu_info_full_primary+0x2bff rdx 0x8b rcx 0x2 rax 0x19 r8 0xffffffff817eb474 kprintf+0x144 r9 0x1 r10 0x8ed20437e8388a88 r11 0xc0887af3ae9824e6 r12 0xffffffff827e3a00 cpu_info_full_primary+0x2a00 r13 0 r14 0 r15 0x1 rip 0xffffffff81552b08 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff80002123bad0 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{0}> show proc PROC (syz-executor1231) pid=140312 stat=onproc flags process=0 proc=4000000 pri=32, usrpri=58, nice=20 forw=0xffffffffffffffff, list=0xffff8000211927e8,0xffff800021193518 process=0xffff8000211f1900 user=0xffff800021237000, vmspace=0xfffffd8008582000 estcpu=36, cpticks=0, pctcpu=0.0 user=0, sys=0, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 80133 211500 53238 0 3 0x80 nanoslp syz-executor1231 80133 393320 53238 0 7 0x4000000 syz-executor1231 80133 184629 53238 0 3 0x4000080 fsleep syz-executor1231 70460 308449 31436 0 3 0x80 nanoslp syz-executor1231 *70460 140312 31436 0 7 0x4000000 syz-executor1231 70460 40575 31436 0 3 0x4000080 fsleep syz-executor1231 53238 318563 57233 0 3 0x80 nanoslp syz-executor1231 31436 102970 57233 0 3 0x80 nanoslp syz-executor1231 57233 281650 71399 0 3 0x82 nanoslp syz-executor1231 71399 282405 54364 0 3 0x10008a sigsusp ksh 54364 172014 51591 0 3 0x9a kqread sshd 69143 98391 1 0 3 0x100083 ttyin getty 51591 209388 1 0 3 0x88 kqread sshd 91055 118854 37160 74 3 0x100092 bpf pflogd 37160 195490 1 0 3 0x80 netio pflogd 59269 489417 78538 73 3 0x100090 kqread syslogd 78538 50481 1 0 3 0x100082 netio syslogd 93138 356985 1 0 3 0x100080 kqread resolvd 74073 150888 46366 77 3 0x100092 kqread dhcpleased 52979 301027 46366 77 3 0x100092 kqread dhcpleased 46366 9037 1 0 3 0x80 kqread dhcpleased 41215 466177 0 0 3 0x14200 bored smr 2980 391234 0 0 3 0x14200 pgzero zerothread 23823 273219 0 0 3 0x14200 aiodoned aiodoned 79095 103314 0 0 3 0x14200 syncer update 28809 260796 0 0 3 0x14200 cleaner cleaner 92625 216351 0 0 3 0x14200 reaper reaper 51428 347553 0 0 3 0x14200 pgdaemon pagedaemon 47197 261302 0 0 3 0x14200 bored viomb 20766 49142 0 0 3 0x40014200 acpi0 acpi0 2523 303346 0 0 3 0x40014200 idle1 11284 148528 0 0 3 0x14200 bored softnet 72783 13181 0 0 3 0x14200 bored systqmp 95706 238264 0 0 3 0x14200 bored systq 38795 301691 0 0 3 0x40014200 bored softclock 79495 18343 0 0 3 0x40014200 idle0 1 135028 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 80133 (syz-executor1231) thread 0xffff800021193508 (393320) exclusive rwlock futex r = 0 (0xffffffff827e4980) #0 witness_lock+0x4b0 stacktrace_save sys/sys/stacktrace.h:36 [inline] #0 witness_lock+0x4b0 sys/kern/subr_witness.c:1182 #1 sys_futex+0x5c sys/kern/sys_futex.c:108 #2 syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] #2 syscall+0x489 sys/arch/amd64/amd64/trap.c:585 #3 Xsyscall+0x128 Process 70460 (syz-executor1231) thread 0xffff800021193268 (140312) exclusive rwlock dklk r = 0 (0xffff8000006ac068) #0 witness_lock+0x4b0 stacktrace_save sys/sys/stacktrace.h:36 [inline] #0 witness_lock+0x4b0 sys/kern/subr_witness.c:1182 #1 rw_enter+0x3e2 sys/kern/kern_rwlock.c:310 #2 vndioctl+0x4f1 sys/dev/vnd.c:538 #3 VOP_IOCTL+0x96 sys/kern/vfs_vops.c:264 #4 vn_ioctl+0xba sys/kern/vfs_vnops.c:531 #5 sys_ioctl+0x4a2 #6 syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] #6 syscall+0x489 sys/arch/amd64/amd64/trap.c:585 #7 Xsyscall+0x128 exclusive kernel_lock &kernel_lock r = 0 (0xffffffff828ba480) #0 witness_lock+0x4b0 stacktrace_save sys/sys/stacktrace.h:36 [inline] #0 witness_lock+0x4b0 sys/kern/subr_witness.c:1182 #1 __mp_acquire_count+0x4c sys/kern/kern_lock.c:227 #2 mi_switch+0x3d3 sys/kern/sched_bsd.c:416 #3 sleep_finish+0x1b2 sys/kern/kern_synch.c:433 #4 rw_enter+0x35b sys/kern/kern_rwlock.c:286 #5 vndioctl+0x4f1 sys/dev/vnd.c:538 #6 VOP_IOCTL+0x96 sys/kern/vfs_vops.c:264 #7 vn_ioctl+0xba sys/kern/vfs_vnops.c:531 #8 sys_ioctl+0x4a2 #9 syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] #9 syscall+0x489 sys/arch/amd64/amd64/trap.c:585 #10 Xsyscall+0x128 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10109 6415K 6416K 78643K 11429 0 pcb 13 8K 8K 78643K 13 0 rtable 62 2K 2K 78643K 118 0 ifaddr 29 8K 8K 78643K 30 0 counters 40 33K 33K 78643K 40 0 ioctlops 0 0K 4K 78643K 1479 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 4 0 vnodes 1183 74K 75K 78643K 1189 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 1K 1K 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 67 87K 87K 78643K 278 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 368 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 7 26K 26K 78643K 7 0 UVM amap 114 4K 6K 78643K 7447 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 4 0K 0K 78643K 4 0 temp 23 4181K 4245K 78643K 3377 0 kqueue 11 16K 16K 78643K 20 0 SYN cache 2 16K 16K 78643K 2 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 20 0 17 1 0 1 1 0 8 0 rtentry 112 23 0 1 1 0 1 1 0 8 0 unpcb 128 35 0 20 1 0 1 1 0 8 0 syncache 296 5 0 5 2 2 0 1 0 8 0 tcpcb 736 8 0 5 1 0 1 1 0 8 0 arp 120 2 0 0 1 0 1 1 0 8 0 inpcb 304 32 0 26 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 8 0 2 1 0 1 1 0 8 0 pfstkey 112 8 0 2 1 0 1 1 0 8 0 pfstate 320 8 0 2 1 0 1 1 0 8 0 pfrule 1360 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 97 0 0 7 0 7 7 0 8 0 art_table 32 98 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 2301 0 905 88 0 88 88 0 8 0 ffsino 272 2301 0 905 94 0 94 94 0 8 0 nchpl 144 3361 0 1806 58 0 58 58 0 8 0 uvmvnodes 72 2312 0 0 43 0 43 43 0 8 0 vnodes 224 2312 0 0 136 0 136 136 0 8 0 namei 1024 8414 0 8414 2 1 1 1 0 8 1 percpumem 16 32 0 0 1 0 1 1 0 8 0 scxspl 216 9065 0 9065 11 10 1 8 0 8 1 plimitpl 152 16 0 9 1 0 1 1 0 8 0 sigapl 424 708 0 675 4 0 4 4 0 8 0 futexpl 64 1634 0 1631 1 0 1 1 0 8 0 knotepl 112 36 0 0 2 0 2 2 0 8 0 kqueuepl 216 16 0 9 1 0 1 1 0 8 0 pipepl 336 72 0 69 2 1 1 1 0 8 0 fdescpl 496 694 0 675 3 0 3 3 0 8 0 filepl 152 2427 0 2365 3 0 3 3 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 18 0 9 1 0 1 1 0 8 0 pgrppl 48 18 0 9 1 0 1 1 0 8 0 ucredpl 96 299 0 287 1 0 1 1 0 8 0 zombiepl 144 675 0 675 2 1 1 1 0 8 1 processpl 1064 708 0 675 3 0 3 3 0 8 0 procpl 672 2000 0 1963 4 0 4 4 0 8 0 sockpl 480 87 0 63 5 1 4 4 0 8 0 mcl8k 8192 4 0 0 1 0 1 1 0 8 0 mcl4k 4096 2 0 0 1 0 1 1 0 8 0 mcl2k 2048 75 0 0 10 0 10 10 0 8 0 mtagpl 96 2 0 0 1 0 1 1 0 8 0 mbufpl 256 140 0 0 8 0 8 8 0 8 0 bufpl 280 3131 0 92 218 0 218 218 0 8 0 anonpl 24 116335 0 113486 21 3 18 18 0 186 0 amapchunkpl 152 15686 0 15474 10 1 9 9 0 158 0 amappl16 200 473 0 469 2 1 1 1 0 8 0 amappl15 192 70 0 67 1 0 1 1 0 8 0 amappl13 176 18 0 17 2 1 1 1 0 8 0 amappl12 168 3 0 3 1 1 0 1 0 8 0 amappl11 160 59 0 42 1 0 1 1 0 8 0 amappl10 152 10 0 7 1 0 1 1 0 8 0 amappl9 144 230 0 228 1 0 1 1 0 8 0 amappl8 136 295 0 290 1 0 1 1 0 8 0 amappl7 128 33 0 32 1 0 1 1 0 8 0 amappl6 120 35 0 31 1 0 1 1 0 8 0 amappl5 112 213 0 195 1 0 1 1 0 8 0 amappl4 104 987 0 964 1 0 1 1 0 8 0 amappl3 96 602 0 585 1 0 1 1 0 8 0 amappl2 88 308 0 276 1 0 1 1 0 8 0 amappl1 80 14216 0 13798 11 2 9 9 0 8 0 amappl 88 7189 0 7094 3 0 3 3 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 24 694 0 675 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 694 0 675 1 0 1 1 0 8 0 vmmpekpl 168 9834 0 9820 1 0 1 1 0 8 0 vmmpepl 168 53073 0 52042 50 4 46 46 0 357 1 vmsppl 368 693 0 675 2 0 2 2 0 8 0 rwobjpl 56 15214 0 14618 11 2 9 9 0 8 0 pdppl 4096 1396 0 1350 72 26 46 46 0 8 0 pvpl 32 245590 0 240701 47 6 41 41 0 265 1 pmappl 224 693 0 675 2 0 2 2 0 8 0 extentpl 40 58 0 40 1 0 1 1 0 8 0 phpool 112 297 0 30 8 0 8 8 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:440 panic(ffffffff824a2454) at panic+0x177 sys/kern/subr_prf.c:202 vndsetcred(2902,80384601,ffff80002123c3a0,1) at vndsetcred VOP_IOCTL(fffffd806e4f4ae8,80384601,ffff80002123c3a0,1,fffffd807f7d7660,ffff800021193268) at VOP_IOCTL+0x96 sys/kern/vfs_vops.c:264 vn_ioctl(fffffd806e587568,80384601,ffff80002123c3a0,ffff800021193268) at vn_ioctl+0xba sys/kern/vfs_vnops.c:531 sys_ioctl(ffff800021193268,ffff80002123c4b8,ffff80002123c510) at sys_ioctl+0x4a2 syscall(ffff80002123c580) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff80002123c580) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x171d74be4e0, count: -8 ddb{0}>