panic: missing alias Stopped at db_enter+0x25: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND *399723 50833 0 0 0x4000000 1K syz-executor db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff833e50cd) at panic+0x1e5 sys/kern/subr_prf.c:198 vgonel(fffffd80631be550,ffff80002a2402b8) at vgonel+0x663 checkalias(fffffd805fc6add8,4800,ffff800000c5a000) at checkalias+0x1ab sys/kern/vfs_subr.c:-1 ffs_vinit(ffff800000c5a000,ffff8000337bd7c0) at ffs_vinit+0x111 sys/ufs/ffs/ffs_subr.c:-1 ffs_vget(ffff800000c5a000,cbfc,ffff8000337bd890) at ffs_vget+0x40e sys/ufs/ffs/ffs_vfsops.c:1285 ufs_lookup() at ufs_lookup+0x16bd sys/ufs/ufs/ufs_lookup.c:573 VOP_LOOKUP(fffffd806f392dd0,ffff8000337bdcd8,ffff8000337bdd08) at VOP_LOOKUP+0x6e sys/kern/vfs_vops.c:85 vfs_lookup(ffff8000337bdca8) at vfs_lookup+0x98a sys/kern/vfs_lookup.c:567 namei(ffff8000337bdca8) at namei+0x7ca sys/kern/vfs_lookup.c:250 vn_open(ffff8000337bdca8,41,0) at vn_open+0x15a sys/kern/vfs_vnops.c:140 doopenat(ffff80002a2402b8,ffffff9c,200000000040,40,0,0,441ee71ee1423a6a) at doopenat+0x35b sys/kern/vfs_syscalls.c:1155 sys_open(ffff80002a2402b8,ffff8000337bdf60,ffff8000337bdeb0) at sys_open+0x59 sys/kern/vfs_syscalls.c:1063 syscall(ffff8000337bdf60) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff8000337bdf60) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:783 end trace frame: 0xffff8000337bdfe0, count: 0 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{1}> ddb{1}> set $lines = 0 ddb{1}> set $maxwidth = 0 ddb{1}> show panic *cpu1: missing alias ddb{1}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff833e50cd) at panic+0x1e5 sys/kern/subr_prf.c:198 vgonel(fffffd80631be550,ffff80002a2402b8) at vgonel+0x663 checkalias(fffffd805fc6add8,4800,ffff800000c5a000) at checkalias+0x1ab sys/kern/vfs_subr.c:-1 ffs_vinit(ffff800000c5a000,ffff8000337bd7c0) at ffs_vinit+0x111 sys/ufs/ffs/ffs_subr.c:-1 ffs_vget(ffff800000c5a000,cbfc,ffff8000337bd890) at ffs_vget+0x40e sys/ufs/ffs/ffs_vfsops.c:1285 ufs_lookup() at ufs_lookup+0x16bd sys/ufs/ufs/ufs_lookup.c:573 VOP_LOOKUP(fffffd806f392dd0,ffff8000337bdcd8,ffff8000337bdd08) at VOP_LOOKUP+0x6e sys/kern/vfs_vops.c:85 vfs_lookup(ffff8000337bdca8) at vfs_lookup+0x98a sys/kern/vfs_lookup.c:567 namei(ffff8000337bdca8) at namei+0x7ca sys/kern/vfs_lookup.c:250 vn_open(ffff8000337bdca8,41,0) at vn_open+0x15a sys/kern/vfs_vnops.c:140 doopenat(ffff80002a2402b8,ffffff9c,200000000040,40,0,0,441ee71ee1423a6a) at doopenat+0x35b sys/kern/vfs_syscalls.c:1155 sys_open(ffff80002a2402b8,ffff8000337bdf60,ffff8000337bdeb0) at sys_open+0x59 sys/kern/vfs_syscalls.c:1063 syscall(ffff8000337bdf60) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff8000337bdf60) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x42fcfe25e20, count: -15 ddb{1}> show registers rdi 0 rsi 0x1 rbp 0xffff8000337bd590 rbx 0xffff8000299bee07 rdx 0 rcx 0xffff80002a2402b8 rax 0xffff8000299bdff0 r8 0x101010101010101 r9 0x8080808080808080 r10 0x5f0089b497a17f6b r11 0x2d6e5e0065a9e5c6 r12 0xffff8000299bec08 r13 0 r14 0 r15 0x1 rip 0xffffffff810f2625 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff8000337bd580 ss 0x10 db_enter+0x25: addq $0x8,%rsp ddb{1}> show proc PROC (syz-executor) tid=399723 pid=50833 tcnt=4 stat=onproc flags process=0 proc=4000000 runpri=82, usrpri=82, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80002a2407e8,0xffff80002a241cb8 process=0xffff8000fffea698 user=0xffff8000337b9000, vmspace=0xfffffd806c720d78 estcpu=32, cpticks=1, pctcpu=0.0, user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 17196 233645 36320 0 2 0 syz-executor 17196 364188 36320 0 3 0x4000080 kqread syz-executor 20005 113872 29499 0 2 0 syz-executor 20005 122936 29499 0 3 0x4000080 fsleep syz-executor 20005 369406 29499 0 3 0x4000080 fsleep syz-executor 80192 98823 63411 0 2 0 syz-executor 50833 229349 86837 0 2 0 syz-executor *50833 399723 86837 0 7 0x4000000 syz-executor 50833 273105 86837 0 3 0x4000080 fsleep syz-executor 50833 47859 86837 0 3 0x4000080 fsleep syz-executor 90426 199711 40751 0 2 0 syz-executor 90426 407241 40751 0 3 0x4000080 fsleep syz-executor 92531 248861 8813 60929 3 0x90 nanoslp syz-executor 92531 343022 8813 60929 3 0x4000090 kqsel syz-executor 92531 312622 8813 60929 3 0x4000090 fsleep syz-executor 92531 257049 8813 60929 3 0x4000090 fsleep syz-executor 73460 355854 1 0 3 0x82 nanoslp getty 86837 432236 44338 0 3 0x82 nanoslp syz-executor 39168 367104 44338 0 3 0x82 wait syz-executor 63411 108543 44338 0 3 0x82 nanoslp syz-executor 21247 485742 44338 0 3 0x82 nanoslp syz-executor 36320 63182 44338 0 3 0x82 nanoslp syz-executor 8813 100415 44338 0 3 0x82 nanoslp syz-executor 29499 260383 44338 0 3 0x82 nanoslp syz-executor 40751 94571 44338 0 3 0x82 nanoslp syz-executor 44338 173364 1 0 3 0x82 kqread syz-executor 64292 122384 0 0 3 0x14200 bored smr 34434 283353 0 0 2 0x14200 zerothread 2856 49605 0 0 3 0x14200 aiodoned aiodoned 73268 383537 0 0 3 0x14200 syncer update 42616 100250 0 0 3 0x14200 cleaner cleaner 94191 418016 0 0 2 0x14200 reaper 15670 412340 0 0 3 0x14200 pgdaemon pagedaemon 24405 123973 0 0 3 0x14200 bored viomb 31730 238907 0 0 3 0x40014200 acpi0 acpi0 755 142534 0 0 3 0x40014200 idle1 23048 443939 0 0 3 0x14200 bored softnet1 82683 40098 0 0 3 0x14200 bored softnet0 4021 52951 0 0 3 0x14200 smrbar systqmp 58600 262725 0 0 3 0x14200 bored systq 10538 465307 0 0 3 0x14200 tmoslp softclockmp 69071 446777 0 0 3 0x40014200 tmoslp softclock 72808 343090 0 0 3 0x40014200 idle0 1 299454 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks CPU 0: exclusive mutex &uvm.fpageqlock r = 0 (0xffffffff83aa05f0) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 mtx_enter+0x4b4 sys/kern/kern_lock.c:487 #2 uvm_pmr_freepages+0x1a8 sys/uvm/uvm_pmemrange.c:-1 #3 pmap_do_remove+0x8af sys/arch/amd64/amd64/pmap.c:1939 #4 uvm_unmap_kill_entry_withlock+0x269 sys/uvm/uvm_map.c:1869 #5 uvm_map_teardown+0x117 uvm_map_addr_RBT_LEFT sys/uvm/uvm_map.h:-1 [inline] #5 uvm_map_teardown+0x117 sys/uvm/uvm_map.c:2497 #6 exit1+0x6fc sys/kern/kern_exit.c:260 #7 sys_exit+0x1a sys/kern/kern_exit.c:-1 #8 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #8 syscall+0xb17 sys/arch/amd64/amd64/trap.c:783 #9 Xsyscall+0x128 Process 50833 (syz-executor) thread 0xffff80002a2402b8 (399723) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff83994bc0) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 __mp_acquire_count+0x58 sys/kern/kern_lock.c:-1 #2 pool_get+0x27e sys/kern/subr_pool.c:595 #3 ffs_vget+0x320 sys/ufs/ffs/ffs_vfsops.c:1266 #4 ufs_lookup+0x16bd sys/ufs/ufs/ufs_lookup.c:573 #5 VOP_LOOKUP+0x6e sys/kern/vfs_vops.c:85 #6 vfs_lookup+0x98a sys/kern/vfs_lookup.c:567 #7 namei+0x7ca sys/kern/vfs_lookup.c:250 #8 vn_open+0x15a sys/kern/vfs_vnops.c:140 #9 doopenat+0x35b sys/kern/vfs_syscalls.c:1155 #10 sys_open+0x59 sys/kern/vfs_syscalls.c:1063 #11 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] #11 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:783 #12 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd806c876310) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 rw_do_enter_write+0x419 sys/kern/kern_rwlock.c:320 #2 rrw_enter+0xc6 sys/kern/kern_rwlock.c:621 #3 VOP_LOCK+0xbd sys/kern/vfs_vops.c:527 #4 ufs_ihashins+0x4f ufs_ihash sys/ufs/ufs/ufs_ihash.c:-1 [inline] #4 ufs_ihashins+0x4f sys/ufs/ufs/ufs_ihash.c:159 #5 ffs_vget+0x187 sys/ufs/ffs/ffs_vfsops.c:1232 #6 ufs_lookup+0x16bd sys/ufs/ufs/ufs_lookup.c:573 #7 VOP_LOOKUP+0x6e sys/kern/vfs_vops.c:85 #8 vfs_lookup+0x98a sys/kern/vfs_lookup.c:567 #9 namei+0x7ca sys/kern/vfs_lookup.c:250 #10 vn_open+0x15a sys/kern/vfs_vnops.c:140 #11 doopenat+0x35b sys/kern/vfs_syscalls.c:1155 #12 sys_open+0x59 sys/kern/vfs_syscalls.c:1063 #13 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] #13 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:783 #14 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd806dcbe8c0) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 rw_do_enter_write+0x419 sys/kern/kern_rwlock.c:320 #2 rrw_enter+0xc6 sys/kern/kern_rwlock.c:621 #3 VOP_LOCK+0xbd sys/kern/vfs_vops.c:527 #4 vn_lock+0xa4 sys/kern/vfs_vnops.c:570 #5 vfs_lookup+0x11c sys/kern/vfs_lookup.c:-1 #6 namei+0x7ca sys/kern/vfs_lookup.c:250 #7 vn_open+0x15a sys/kern/vfs_vnops.c:140 #8 doopenat+0x35b sys/kern/vfs_syscalls.c:1155 #9 sys_open+0x59 sys/kern/vfs_syscalls.c:1063 #10 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] #10 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:783 #11 Xsyscall+0x128 Process 4021 (systqmp) thread 0xffff8000ffffe298 (52951) shared rwlock systqmp r = 0 (0xffffffff8395f7c8) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 taskq_thread+0x12a sys/kern/kern_task.c:442 #2 proc_trampoline+0x10 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 11049 12016K 12538K 166960K 12465 0 pcb 17 13K 13K 166960K 66 0 rtable 226 8K 9K 166960K 395 0 pf 35 17K 25K 166960K 92 0 ifaddr 40 6K 7K 166960K 57 0 ifgroup 53 2K 2K 166960K 80 0 sysctl 3 1K 9K 166960K 9 0 counters 70 37K 37K 166960K 94 0 ioctlops 0 0K 4K 166960K 1517 0 iov 0 0K 16K 166960K 13 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1355 85K 86K 166960K 1636 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 5 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 18 0 dirhash 12 2K 2K 166960K 15 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 16 61K 93K 166960K 364 0 sigio 1 0K 0K 166960K 4 0 proc 21 33K 196K 166960K 583 0 subproc 72 4K 4K 166960K 72 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 7 0 in_multi 91 6K 7K 166960K 104 0 ether_multi 1 0K 0K 166960K 1 0 mrt 0 0K 0K 166960K 15 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 55 254K 254K 166960K 55 0 exec 0 0K 1K 166960K 538 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 128 96K 176K 166960K 5102 0 UVM aobj 11 6K 6K 166960K 12 0 pinsyscall 19 38K 104K 166960K 1519 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 16 0 NDP 12 0K 1K 166960K 37 0 temp 46 9080K 9145K 166960K 19574 0 kqueue 4 8K 28K 166960K 67 0 SYN cache 2 16K 16K 166960K 2 0 ddb{1}>