From: Al Viro <viro@xxxxxxxxxxxxxxxxxx>
The only reason why we needed one more was that purely nested
MAXSYMLINKS symlinks could lead to path_init() using that many
entries in addition to nd->stack[0] which it left unused.
That can't happen now - path_init() starts with entry 0 (and
trailing_symlink() is called only when we'd already encountered
one symlink, so no more than MAXSYMLINKS-1 are left).
Signed-off-by: Al Viro <viro@xxxxxxxxxxxxxxxxxx>
---
fs/namei.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/fs/namei.c b/fs/namei.c
index d12b16c..b939f48 100644
--- a/fs/namei.c
+++ b/fs/namei.c
@@ -528,7 +528,7 @@ static void restore_nameidata(struct nameidata *nd)
static int __nd_alloc_stack(struct nameidata *nd)
{
- struct saved *p = kmalloc((MAXSYMLINKS + 1) * sizeof(struct saved),
+ struct saved *p = kmalloc(MAXSYMLINKS * sizeof(struct saved),
GFP_KERNEL);
if (unlikely(!p))
return -ENOMEM;
--
2.1.4
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