panic: missing alias Starting stack trace... panic(ffffffff8330daea) at panic+0x1ba sys/kern/subr_prf.c:229 vgonel(fffffd806c8e6018,ffff800034905778) at vgonel+0x663 checkalias(fffffd805d83e458,800,ffff800000c68400) at checkalias+0x1ab sys/kern/vfs_subr.c:-1 ffs_vinit(ffff800000c68400,ffff800038114a30) at ffs_vinit+0x111 sys/ufs/ffs/ffs_subr.c:-1 ffs_vget(ffff800000c68400,d4f6,ffff800038114b00) at ffs_vget+0x406 sys/ufs/ffs/ffs_vfsops.c:1285 ufs_lookup() at ufs_lookup+0x16ad sys/ufs/ufs/ufs_lookup.c:573 VOP_LOOKUP(fffffd8009471438,ffff800038114f50,ffff800038114f80) at VOP_LOOKUP+0x6e sys/kern/vfs_vops.c:85 vfs_lookup(ffff800038114f20) at vfs_lookup+0x921 sys/kern/vfs_lookup.c:566 namei(ffff800038114f20) at namei+0x7ca sys/kern/vfs_lookup.c:250 vn_open(ffff800038114f20,3,0) at vn_open+0x15a sys/kern/vfs_vnops.c:140 doopenat(ffff800034905778,ffffff9c,fc52d10e2b0,2,0,ffff8000381150c0) at doopenat+0x34d sys/kern/vfs_syscalls.c:1138 syscall(ffff800038115170) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff800038115170) at syscall+0x962 sys/arch/amd64/amd64/trap.c:775 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x705d64d98280, count: 244 End of stack trace. syncing disks...32 32 done WARNING: SPL NOT LOWERED ON SYSCALL 110 53 EXIT 0 3 Stopped at savectx+0xae: movl $0,%gs:0x688 TID PID UID PRFLAGS PFLAGS CPU COMMAND *152323 65005 0 0x2 0 0 syz-executor savectx() at savectx+0xae end of kernel end trace frame: 0x775ff53b8590, count: 14 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: missing alias ddb> trace savectx() at savectx+0xae end of kernel end trace frame: 0x775ff53b8590, count: -1 ddb> show registers rdi 0 rsi 0 rbp 0xffff80002a7cf560 rbx 0 rdx 0 rcx 0 rax 0x34 r8 0xffff80002a7cf490 r9 0 r10 0xd51cfbf554001f8d r11 0xd4e5efae4da2e251 r12 0 r13 0 r14 0xffff80002a777760 r15 0 rip 0xffffffff813743ee savectx+0xae cs 0x8 rflags 0x46 rsp 0xffff80002a7cf4e0 ss 0x10 savectx+0xae: movl $0,%gs:0x688 ddb> show proc PROC (syz-executor) tid=152323 pid=65005 tcnt=1 stat=onproc flags process=2 proc=0 runpri=24, usrpri=50, slppri=24, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80002a776538,0xffff80002a776a78 process=0xffff80002a7d1690 user=0xffff80002a7ca000, vmspace=0xfffffd807e9bf8a0 estcpu=0, cpticks=65, pctcpu=0.0, user=7, sys=57, intr=1 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 76920 117819 54363 0 2 0 syz-executor 76920 343256 54363 0 2 0x4000000 syz-executor 61585 502504 13969 0 2 0 syz-executor 1902 252273 46620 0 2 0 syz-executor 57607 312414 55399 0 2 0 syz-executor 57607 375968 55399 0 3 0x4000080 fsleep syz-executor 57607 275005 55399 0 2 0x4000000 syz-executor 57607 286938 55399 0 2 0x4000000 syz-executor 37160 198048 17581 0 2 0 syz-executor 37160 128935 17581 0 2 0x4000000 syz-executor 37160 41063 17581 0 2 0x4000000 syz-executor 34552 208464 87035 0 2 0 syz-executor 34552 101688 87035 0 2 0x4000000 syz-executor 23849 202371 73833 0 2 0 syz-executor 23849 137454 73833 0 3 0x4000080 fsleep syz-executor 589 20732 1 0 3 0x2 netlock getty 73833 216572 65005 0 2 0xc82 syz-executor 51928 65982 0 0 3 0x14280 nfsidl nfsio 76949 491031 0 0 3 0x14280 nfsidl nfsio 15063 99177 0 0 3 0x14280 nfsidl nfsio 17131 33420 0 0 3 0x14280 nfsidl nfsio 52661 415237 0 0 3 0x14280 nfsidl nfsio 64552 85728 0 0 3 0x14280 nfsidl nfsio 4235 400225 0 0 3 0x14280 nfsidl nfsio 59809 245344 0 0 3 0x14280 nfsidl nfsio 59533 235335 0 0 3 0x14280 nfsidl nfsio 15294 166744 0 0 3 0x14280 nfsidl nfsio 68491 125699 0 0 3 0x14280 nfsidl nfsio 27739 127615 0 0 3 0x14280 nfsidl nfsio 24929 505680 0 0 3 0x14280 nfsidl nfsio 36620 338695 0 0 3 0x14280 nfsidl nfsio 86941 183039 0 0 3 0x14280 nfsidl nfsio 854 140156 0 0 3 0x14280 nfsidl nfsio 26173 314112 0 0 3 0x14280 nfsidl nfsio 67164 8771 0 0 3 0x14280 nfsidl nfsio 91623 489017 0 0 3 0x14280 nfsidl nfsio 40577 241841 0 0 3 0x14280 nfsidl nfsio 54363 412678 65005 0 2 0xc82 syz-executor 55399 320725 65005 0 2 0xc82 syz-executor 3335 22900 65005 0 2 0x2 syz-executor 13969 131523 65005 0 2 0xc82 syz-executor 87035 202476 65005 0 2 0xc82 syz-executor 46620 118909 65005 0 2 0xc82 syz-executor 17581 351999 65005 0 2 0xc82 syz-executor *65005 152323 99370 0 7 0x2 syz-executor 99370 19015 78453 0 3 0x10008a sigsusp ksh 78453 32488 90526 0 3 0x98 kqread sshd-session 90526 15437 30015 0 3 0x92 kqread sshd-session 30015 382858 1 0 3 0x88 kqread sshd 61209 249700 2859 73 3 0x1100090 kqread syslogd 2859 209915 1 0 3 0x100082 sbwait syslogd 52128 465278 1 0 3 0x100080 kqread resolvd 95532 227864 85034 77 3 0x100092 kqread dhcpleased 55993 146808 85034 77 3 0x100092 kqread dhcpleased 85034 438412 1 0 3 0x80 kqread dhcpleased 84972 149721 0 0 3 0x14200 bored smr 17656 315174 0 0 2 0x14200 zerothread 18351 182534 0 0 3 0x14200 aiodoned aiodoned 56705 61504 0 0 2 0x14200 update 56234 161473 0 0 3 0x14200 cleaner cleaner 38425 509700 0 0 3 0x14200 reaper reaper 88864 470355 0 0 3 0x14200 pgdaemon pagedaemon 72559 52078 0 0 3 0x14200 bored viomb 56122 213305 0 0 3 0x40014200 acpi0 acpi0 93620 312064 0 0 3 0x14200 netlock softnet0 62137 187261 0 0 3 0x14200 bored systqmp 50409 25352 0 0 3 0x14200 bored systq 77648 238328 0 0 3 0x40014200 netlock softclock 71451 456988 0 0 3 0x40014200 idle0 1 351721 0 0 3 0x82 wait init 0 0 -1 0 3 0x10010200 scheduler swapper ddb> show all locks No such command ddb> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 11049 12103K 12580K 166960K 14395 0 pcb 17 22K 24K 166960K 549 0 rtable 252 10K 10K 166960K 566 0 pf 36 14K 18K 166960K 172 0 ifaddr 41 8K 9K 166960K 115 0 ifgroup 50 2K 2K 166960K 202 0 sysctl 4 1K 9K 166960K 17 0 counters 33 17K 18K 166960K 103 0 ioctlops 0 0K 4K 166960K 382 0 iov 0 0K 32K 166960K 157 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1456 92K 92K 166960K 2979 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 2K 5K 166960K 5 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 253 0 dirhash 12 2K 2K 166960K 36 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 18 65K 93K 166960K 1559 0 sigio 0 0K 0K 166960K 67 0 proc 60 59K 100K 166960K 657 0 subproc 72 4K 4K 166960K 82 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 303 0 in_multi 98 7K 7K 166960K 157 0 ether_multi 1 0K 0K 166960K 14 0 mrt 2 0K 0K 166960K 17 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 157 705K 705K 166960K 157 0 exec 0 0K 1K 166960K 559 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 0K 166960K 3 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 217 151K 173K 166960K 16274 0 UVM aobj 78 13K 15K 166960K 91 0 pinsyscall 39 78K 94K 166960K 2669 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 115 0 NDP 11 0K 1K 166960K 82 0 temp 79 8680K 8808K 166960K 75697 0 kqueue 13 20K 29K 166960K 301 0 SYN cache 2 16K 16K 166960K 2 0 ddb> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle rtpcb 120 237 0 234 3 2 1 3 0 8 0 rtentry 136 167 0 63 4 0 4 4 0 8 0 unpcb 144 1279 0 1264 7 5 2 6 0 8 1 syncache 336 4 0 4 1 1 0 1 0 8 0 tcpqe 32 1 0 1 1 1 0 1 0 8 0 tcpcb 736 660 0 656 19 10 9 13 0 8 8 arp 96 28 0 9 1 0 1 1 0 8 0 ipq 40 9 0 9 1 0 1 1 0 8 1 ipqe 40 77 0 77 1 0 1 1 0 8 1 inpcb 328 2182 0 2174 35 26 9 23 0 8 7 ip6q 72 8 0 7 1 0 1 1 0 8 0 ip6af 40 11 0 10 1 0 1 1 0 8 0 nd6 112 36 0 7 1 0 1 1 0 8 0 pkpcb 40 8 0 8 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 1072 52 0 52 2 1 1 1 0 8 1 pppxif 1384 5 0 5 2 1 1 1 0 8 1 pfstscr 40 4 0 3 1 0 1 1 0 8 0 pfrktable 1344 3 0 3 2 1 1 1 0 8 1 pfanchor 1288 1 0 0 1 0 1 1 0 8 0 pftag 88 3 0 0 1 0 1 1 0 8 0 pfqueue 320 1 0 0 1 0 1 1 0 8 0 pfstitem 24 1 0 0 1 0 1 1 0 8 0 pfstkey 128 3 0 2 1 0 1 1 0 8 0 pfstate 384 3 0 2 1 0 1 1 0 8 0 pfrule 1360 5 0 4 2 1 1 1 0 8 0 rttmr 136 2 0 2 1 1 0 1 0 8 0 art_heap8 4096 3 0 0 3 0 3 3 0 8 0 art_heap4 256 636 0 223 33 2 31 31 0 8 1 art_table 40 639 0 223 5 0 5 5 0 8 0 art_node 32 166 0 74 1 0 1 1 0 8 0 sysvmsgpl 40 5 0 3 1 0 1 1 0 8 0 semapl 112 250 0 240 1 0 1 1 0 8 0 shmpl 112 80 0 10 2 0 2 2 0 8 0 dirhash 1024 33 0 16 3 0 3 3 0 8 0 dino2pl 256 4536 0 3041 95 0 95 95 0 8 0 ffsino 256 4536 0 3041 95 0 95 95 0 8 0 nchpl 144 6776 0 5086 64 0 64 64 0 8 0 rtmask 32 2 0 2 1 0 1 1 0 8 1 vnodes 216 5463 0 0 304 0 304 304 0 8 0 namei 1024 24304 0 24302 1 0 1 1 0 8 0 vcpupl 3904 7 0 2 1 0 1 1 0 8 0 vmpool 808 8 0 3 1 0 1 1 0 8 0 kstatmem 264 128 0 106 2 0 2 2 0 8 0 scsiplug 72 13 0 13 2 1 1 1 0 8 1 scxspl 216 28637 0 28636 9 7 2 8 1 8 1 plimitpl 152 489 0 472 1 0 1 1 0 8 0 sigapl 424 1871 0 1808 9 1 8 8 0 8 0 knotepl 120 77207 0 77160 39 29 10 17 0 8 8 kqueuepl 184 665 0 655 7 3 4 4 0 8 3 pipepl 304 288 0 261 5 2 3 5 0 8 0 fdescpl 448 1834 0 1804 5 1 4 5 0 8 0 filepl 120 13773 0 13559 20 8 12 17 0 8 3 lockfpl 104 547 0 545 1 0 1 1 0 8 0 lockfspl 48 209 0 207 1 0 1 1 0 8 0 sessionpl 144 24 0 17 1 0 1 1 0 8 0 pgrppl 48 175 0 160 1 0 1 1 0 8 0 ucredpl 104 2378 0 2367 1 0 1 1 0 8 0 zombiepl 144 2542 0 2542 1 0 1 1 0 8 1 processpl 1152 1871 0 1808 5 0 5 5 0 8 0 procpl 664 4364 0 4292 8 0 8 8 0 8 1 sosppl 176 19 0 19 2 1 1 1 0 8 1 sockpl 552 3752 0 3726 35 25 10 26 0 8 7 mcl64k 65536 141 0 141 1 0 1 1 0 8 1 mcl16k 16384 5 0 5 1 1 0 1 0 8 0 mcl12k 12288 1 0 1 1 0 1 1 0 8 1 mcl9k 9216 2 0 2 1 0 1 1 0 8 1 mcl8k 8192 85 0 85 2 1 1 1 0 8 1 mcl4k 4096 4516 0 4459 15 7 8 15 0 8 0 mcl2k2 2112 2 0 2 2 1 1 1 0 8 1 mcl2k 2048 1820 0 1814 6 4 2 5 0 8 0 mtagpl 96 23 0 7 1 0 1 1 0 8 0 mbufpl 256 27790 0 27495 228 201 27 171 0 8 7 bufpl 280 10430 0 4209 445 0 445 445 0 8 0 anonpl 24 287655 0 284566 69 6 63 69 0 187 21 amapchunkpl 152 56944 0 56511 55 16 39 39 0 158 19 amappl16 200 5198 0 5164 37 20 17 27 0 8 8 amappl15 192 9 0 9 1 1 0 1 0 8 0 amappl14 184 34 0 34 1 1 0 1 0 8 0 amappl13 176 469 0 468 1 0 1 1 0 8 0 amappl12 168 2217 0 2179 2 0 2 2 0 8 0 amappl11 160 8 0 8 1 1 0 1 0 8 0 amappl10 152 45 0 35 1 0 1 1 0 8 0 amappl9 144 249 0 249 1 1 0 1 0 8 0 amappl8 136 20 0 18 1 0 1 1 0 8 0 amappl7 128 84 0 82 1 0 1 1 0 8 0 amappl6 120 279 0 267 1 0 1 1 0 8 0 amappl5 112 72 0 64 1 0 1 1 0 8 0 amappl4 104 392 0 369 1 0 1 1 0 8 0 amappl3 96 9566 0 9485 3 0 3 3 0 8 0 amappl2 88 1965 0 1891 2 0 2 2 0 8 0 amappl1 80 14921 0 14384 13 0 13 13 0 8 0 amappl 88 15285 0 15138 5 0 5 5 0 92 0 uvmvnodes 80 134 0 0 3 0 3 3 0 8 0 dma4096 4096 3 0 3 2 1 1 1 0 8 1 dma1024 1024 5 0 4 1 0 1 1 0 8 0 dma256 256 6 0 6 1 1 0 1 0 8 0 dma128 128 258 0 258 2 1 1 1 0 8 1 dma64 64 6 0 6 1 1 0 1 0 8 0 dma32 32 8 0 8 2 1 1 1 0 8 1 dma16 16 18 0 17 1 0 1 1 0 8 0 aobjpl 72 90 0 13 2 0 2 2 0 8 0 uaddrrnd 24 1833 0 1804 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1833 0 1804 1 0 1 1 0 8 0 vmmpekpl 168 15861 0 15819 3 0 3 3 0 8 0 vmmpepl 168 119503 0 117724 103 10 93 102 0 357 13 vmsppl 368 1833 0 1804 4 1 3 4 0 8 0 rwobjpl 40 32004 0 30970 16 0 16 16 0 8 2 pdppl 4096 3691 0 3619 128 56 72 81 0 8 0 pvpl 32 806669 0 798325 153 21 132 152 0 265 28 pmappl 216 1841 0 1807 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 648 0 288 15 0 15 15 0 8 0 ddb> machine ddbcpu 0 No such command ddb> trace savectx() at savectx+0xae end of kernel end trace frame: 0x775ff53b8590, count: -1 ddb> machine ddbcpu 1 No such command ddb> trace savectx() at savectx+0xae end of kernel end trace frame: 0x775ff53b8590, count: -1