From e269f2a73f92b40169c4229289587b901a00b244 Mon Sep 17 00:00:00 2001 From: Al Viro Date: Sun, 3 May 2015 21:30:27 -0400 Subject: [PATCH] namei: we never need more than MAXSYMLINKS entries in nd->stack 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 --- fs/namei.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/fs/namei.c b/fs/namei.c index d12b16c13f0c..b939f488bc6f 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; -- 2.20.1