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authorJohn Keeping <john@keeping.me.uk>2013-04-01 19:03:34 +0100
committerJason A. Donenfeld <Jason@zx2c4.com>2013-04-08 15:59:46 +0200
commitb1f17f168b91d709c0c0e62608de301a36f06da9 (patch)
tree9aff1fe903087cb5016ab2afdb32a7ca1cc139b2 /ui-refs.c
parentui-refs.c: Refactor print_tag() (diff)
downloadcgit-pink-b1f17f168b91d709c0c0e62608de301a36f06da9.tar.gz
cgit-pink-b1f17f168b91d709c0c0e62608de301a36f06da9.zip
Fix out-of-bounds memory accesses with virtual_root=""
The CGit configuration variable virtual_root is normalized so that it
does not have a trailing '/' character, but it is allowed to be empty
(the empty string and NULL have different meanings here) and there is
code that is insufficiently cautious when checking if it ends in a '/':

	if (virtual_root[strlen(virtual_root) - 1] != '/')

Clearly this check is redundant, but rather than simply removing it we
get a slight efficiency improvement by switching the normalization so
that the virtual_root variable always ends in '/'.  Do this with a new
"ensure_end" helper.

Signed-off-by: John Keeping <john@keeping.me.uk>
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