filesystems - My system became suddenly read-only

System Linux Mint 17 x64.

My local FS suddenly became read-only, I had to restart.

Why could this happen?

Could I fix it without restart?

syslog file

Answer

The reason why the system became read-only is that I was trying to mount a problematic ntfs partition, which, on fail, made the local fs become read-only, probably for security / integrity reasons.