mm: kvfree the swap cluster info if the swap file is unsatisfactory

If initializing a small swap file fails because the swap file has a
problem (holes, etc.) then we need to free the cluster info as part of
cleanup.  Unfortunately a previous patch changed the code to use kvzalloc
but did not change all the vfree calls to use kvfree.

Found by running generic/357 from xfstests.

Link: http://lkml.kernel.org/r/20170831233515.GR3775@magnolia
Fixes: 54f180d3c181 ("mm, swap: use kvzalloc to allocate some swap data structures")
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: "Huang, Ying" <ying.huang@intel.com>
Acked-by: David Rientjes <rientjes@google.com>
Cc: Hugh Dickins <hughd@google.com>
Cc: <stable@vger.kernel.org>	[4.12+]
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/mm/swapfile.c b/mm/swapfile.c
index d483278ee35b1fe9f728ec93c867dcd7621fd4af..12251d386dc76b3ad8db17014086538f80ccf686 100644 (file)
--- a/mm/swapfile.c
+++ b/mm/swapfile.c
@@ -3290,7 +3290,7 @@ bad_swap:
        p->flags = 0;
        spin_unlock(&swap_lock);
        vfree(swap_map);
-       vfree(cluster_info);
+       kvfree(cluster_info);
        if (swap_file) {
                if (inode && S_ISREG(inode->i_mode)) {
                        inode_unlock(inode);