git: return strdup()ed empty string on error in pop_cstring

The pop_cstring() function is used by the git parser to
duplicate a quoted string. On error, it returns an empty
string literal. Since the caller expects a copied string
and takes ownership of that string, it will ultimately
be freed.

Concrete example: a log with erroneous cylinder data was opened
getting such an empty string literal as description. On closing or
syncing with the cloud, the dive is freed, leading to a free
of the string literal -> crash.

Return a copy of the empty string instead.

Signed-off-by: Berthold Stoeger <bstoeger@mail.tuwien.ac.at>

0 files changed, 0 insertions, 0 deletions