mm/swapfile.c: fix swapon frontswap_map memory leak on error

commit b6b1fd2a6bedd533aeed83924d7be0e944fded9f upstream.

Free frontswap_map if an error is encountered before enable_swap_info().

Signed-off-by: David Rientjes <rientjes@google.com>
Reviewed-by: "Huang, Ying" <ying.huang@intel.com>
Cc: Darrick J. Wong <darrick.wong@oracle.com>
Cc: Hugh Dickins <hughd@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/mm/swapfile.c b/mm/swapfile.c
index c1deb0104b5fec7f9fe67a462020afe15383d1eb..a8952b6563c6e06a50278e5a2889e0cf54dff1a2 100644 (file)
--- a/mm/swapfile.c
+++ b/mm/swapfile.c
@@ -3053,6 +3053,7 @@ bad_swap:
        spin_unlock(&swap_lock);
        vfree(swap_map);
        kvfree(cluster_info);
+       kvfree(frontswap_map);
        if (swap_file) {
                if (inode && S_ISREG(inode->i_mode)) {
                        inode_unlock(inode);