From: David Rientjes <rientjes@xxxxxxxxxx>
Subject: mm/swapfile.c: fix swapon frontswap_map memory leak on error
Free frontswap_map if an error is encountered before enable_swap_info().
Signed-off-by: David Rientjes <rientjes@xxxxxxxxxx>
Reviewed-by: "Huang, Ying" <ying.huang@xxxxxxxxx>
Cc: Darrick J. Wong <darrick.wong@xxxxxxxxxx>
Cc: Hugh Dickins <hughd@xxxxxxxxxx>
Cc: <stable@xxxxxxxxxxxxxxx> [4.12+]
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/swapfile.c | 1 +
1 file changed, 1 insertion(+)
diff -puN mm/swapfile.c~mm-swapfile-fix-swapon-frontswap_map-memory-leak-on-error mm/swapfile.c
--- a/mm/swapfile.c~mm-swapfile-fix-swapon-frontswap_map-memory-leak-on-error
+++ a/mm/swapfile.c
@@ -3291,6 +3291,7 @@ 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);
_