Description of problem:
This happened while having an SMB share mounted. Then I switched from WIFI to Ethernet connection (or vice versa).
After that navigating in Nautilus was not possible, so I tried to unmount and remout the share using the GUI in Nautilus. The GUI only became responsive after gvfsd-smb crashed.

Version-Release number of selected component:
gvfs-smb-1.18.3-2.fc20

Additional info:
reporter:       libreport-2.2.2
backtrace_rating: 4
cmdline:        /usr/libexec/gvfsd-smb --spawner :1.3 /org/gtk/gvfs/exec_spaw/3
crash_function: SMBC_read_ctx
executable:     /usr/libexec/gvfsd-smb
kernel:         3.14.4-200.fc20.x86_64
runlevel:       N 5
type:           CCpp
uid:            1000

Truncated backtrace:
Thread no. 1 (4 frames)
 #0 SMBC_read_ctx at ../source3/libsmb/libsmb_file.c:250
 #1 do_read at gvfsbackendsmb.c:835
 #2 g_vfs_job_run at gvfsjob.c:197
 #4 g_thread_proxy at gthread.c:798

Potential duplicate: bug 957536