mm, mempolicy: silence gcc warning

Fengguang Wu reports that compiling mm/mempolicy.c results in a warning:

  mm/mempolicy.c: In function 'mpol_to_str':
  mm/mempolicy.c:2878:2: error: format not a string literal and no format arguments

Kees says this is because he is using -Wformat-security.

Silence the warning.

Signed-off-by: David Rientjes <rientjes@google.com>
Reported-by: Fengguang Wu <fengguang.wu@intel.com>
Suggested-by: Kees Cook <keescook@chromium.org>
Acked-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/mm/mempolicy.c b/mm/mempolicy.c
index c4403cdf3433ddc79515dac25e5eedd0b39fa320..eca4a3129129751208b41cfe808e9e31e5dc7b5f 100644 (file)
--- a/mm/mempolicy.c
+++ b/mm/mempolicy.c
@@ -2950,7 +2950,7 @@ void mpol_to_str(char *buffer, int maxlen, struct mempolicy *pol)
                return;
        }
 
-       p += snprintf(p, maxlen, policy_modes[mode]);
+       p += snprintf(p, maxlen, "%s", policy_modes[mode]);
 
        if (flags & MPOL_MODE_FLAGS) {
                p += snprintf(p, buffer + maxlen - p, "=");