DragonFlyBSD Kernel Audit
DF-2826 / baseline_fresh_vref_panic.txt
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hammer2: enable read/write
mount_hammer2: unable to connect to cluster controller
mount_hammer2: cluster_connect(/dev/vbd0s1d@ROOT) failed
Mounting tmpfs at /var/run/shm.
Setting hostname: dfbsd.
Starting dhclient.
starting dhclient on vtnet0
lo0: flags=808049<UP,LOOPBACK,RUNNING,MULTICAST,PROXY> metric 0 mtu 16384
	options=43<RXCSUM,TXCSUM,RSS>
	inet 127.0.0.1 netmask 0xff000000
	inet6 ::1 prefixlen 128
	inet6 fe80::1%lo0 prefixlen 64 scopeid 0x2
	groups: lo
vtnet0: flags=808843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST,PROXY> metric 0 mtu 1500
	options=28<VLAN_MTU,JUMBO_MTU>
	ether 52:54:00:12:34:56
	inet6 fe80::5054:ff:fe12:3456%vtnet0 prefixlen 64 tentative scopeid 0x1
	media: Ethernet 1000baseT <full-duplex>
	status: active
add net default: gateway 10.0.2.2
Additional routing options:.
Starting devd.
Additional TCP options:.
Mounting NFS file systems:.
ELF ldconfig path: /lib /usr/lib /usr/local/lib /usr/local/libdata/ldconfig/pkg
Building databases...
Starting syslogd.
Sep  1 19:44:47 dfbsd syslogd: kernel boot file is /boot/kernel/kernel

No core dumps found.
swap low/high-water marks set to 41940/62910
swapon: adding /dev/vbd0s1b as swap device
NFS CLIENT: access_cache_timeout=5 neg_cache_timeout=3.
Starting local daemons:.
Updating motd.
Configuring syscons: blanktime.
Starting sshd.
sendmail_submit: /etc/mail/aliases.db not present,  generating
sendmail_clientmqueue: /etc/mail/aliases.db not present,  generating
Starting cron.
Local package initialization:.

Tue Sep  1 19:44:47 UTC 2026


DragonFly/x86_64 (dfbsd) (ttyd0)



login: panic: vref: bad refcnt 00000000 1
cpuid = 2
Trace beginning at frame 0xfffff801185234a8
vref() at vref+0x36 0xffffffff806f6bc6 
vref() at vref+0x36 0xffffffff806f6bc6 
vnode_pager_reference() at vnode_pager_reference+0x1d 0xffffffff809bfe2d 
vm_mmap() at vm_mmap+0x3a7 0xffffffff809a9b57 
fp_mmap() at fp_mmap+0x14a 0xffffffff80638d2a 
mmap_phdr() at mmap_phdr+0x54 0xffffffff8061d9d4 
Debugger("panic")

CPU2 stopping CPUs: 0x0000003b
 stopped
Stopped at      Debugger+0x7c:  movb    $0,0xbdaf09(%rip)
db>