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| author | Lukas Fleischer <calcurse@cryptocrack.de> | 2012-02-16 08:44:55 +0100 |
|---|---|---|
| committer | Lukas Fleischer <calcurse@cryptocrack.de> | 2012-02-16 08:44:55 +0100 |
| commit | f73f50055987a5ba644ab9721741ef1b9861b079 (patch) | |
| tree | d7d38e86fd6609c1bde5f7e7dc3d70f76ea5c1b4 /src | |
| parent | dfc98b5fa1f7744b17ead661f2919f5b7c2105a7 (diff) | |
| download | calcurse-f73f50055987a5ba644ab9721741ef1b9861b079.tar.gz calcurse-f73f50055987a5ba644ab9721741ef1b9861b079.zip | |
src/llist.c: Bail out early on negative indexes
Make sure we don't return bogus list elements if negative indexes are
used in llist_{,find_}nth(). Bail out early and return NULL instead.
Signed-off-by: Lukas Fleischer <calcurse@cryptocrack.de>
Diffstat (limited to 'src')
| -rw-r--r-- | src/llist.c | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/src/llist.c b/src/llist.c index a85cfa9..e560408 100644 --- a/src/llist.c +++ b/src/llist.c @@ -99,7 +99,10 @@ llist_nth (llist_t *l, int n) { llist_item_t *i; - for (i = l->head; i && n > 0; n--) + if (n < 0) + return NULL; + + for (i = l->head; i && n != 0; n--) i = i->next; return i; @@ -267,6 +270,9 @@ llist_find_nth (llist_t *l, int n, long data, llist_fn_match_t fn_match) { llist_item_t *i; + if (n < 0) + return NULL; + for (i = l->head; i; i = i->next) { if (fn_match (i->data, data) && (n-- == 0)) |