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revision.c: fix possible null pointer arithmetic

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mark_tree_uninteresting() dereferences a tree pointer before
checking if the pointer is valid. Fix that by doing the check first.

Signed-off-by: Stefan Naewe <stefan.naewe@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Stefan Naewe 2015-12-05 16:27:24 +01:00 committed by Junio C Hamano
parent 24358560c3
commit a2678df335
1 changed files with 3 additions and 1 deletions
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revision.c
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@ -131,10 +131,12 @@ static void mark_tree_contents_uninteresting(struct tree *tree)
void mark_tree_uninteresting(struct tree *tree) void mark_tree_uninteresting(struct tree *tree)
{ {
struct object *obj = &tree->object; struct object *obj;
if (!tree) if (!tree)
return; return;
obj = &tree->object;
if (obj->flags & UNINTERESTING) if (obj->flags & UNINTERESTING)
return; return;
obj->flags |= UNINTERESTING; obj->flags |= UNINTERESTING;