From 042cf2fb1d2ac4b4b27b2ccc4ac317a2f53df3c3 Mon Sep 17 00:00:00 2001 From: Xi Wang Date: Fri, 4 Jan 2013 03:22:57 -0500 Subject: [PATCH] nfs: fix null checking in nfs_get_option_str() commit e25fbe380c4e3c09afa98bcdcd9d3921443adab8 upstream. The following null pointer check is broken. *option = match_strdup(args); return !option; The pointer `option' must be non-null, and thus `!option' is always false. Use `!*option' instead. The bug was introduced in commit c5cb09b6f8 ("Cleanup: Factor out some cut-and-paste code."). Signed-off-by: Xi Wang Signed-off-by: Trond Myklebust Signed-off-by: Greg Kroah-Hartman --- fs/nfs/super.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/fs/nfs/super.c b/fs/nfs/super.c index feabe7a..c252161 100644 --- a/fs/nfs/super.c +++ b/fs/nfs/super.c @@ -1138,7 +1138,7 @@ static int nfs_get_option_str(substring_t args[], char **option) { kfree(*option); *option = match_strdup(args); - return !option; + return !*option; } static int nfs_get_option_ul(substring_t args[], unsigned long *option) -- 2.7.4