Restrict deep nesting of configfiles

There is no point in restricting the number of included config-
files, but there is a point in restricting the nestinglevel
of configfiles: to avoid recursive inclusions. This is easily
achieved by decrementing the static nesting-variable upon exit
from cgit_read_config().

Also fix some whitespace breakage.

Signed-off-by: Lars Hjemli <hjemli@gmail.com>

1 files changed, 4 insertions, 2 deletions

diff --git a/parsing.c b/parsing.c
index 8e15e5a..36b0f0c 100644
--- a/parsing.c
+++ b/parsing.c
@@ -70,13 +70,15 @@ int cgit_read_config(const char *filename, configfn fn)
         const char *value;
         FILE *f;
 
-        /* cancel the reading of yet another configfile after 16 invocations */
-        if (nesting++ > 16)
+        /* cancel deeply nested include-commands */
+        if (nesting > 8)
                 return -1;
         if (!(f = fopen(filename, "r")))
                 return -1;
+        nesting++;
         while((len = read_config_line(f, line, &value, sizeof(line))) > 0)
                 (*fn)(line, value);
+        nesting--;
         fclose(f);
         return 0;
 }