[cdi-devel] [PATCH] ext2: Check for null pointer before using it

[Pascal Störzbach <baesae@xxxxxxxxxx>]

! Copy from buffer to cache block after verifying wether cache block is valid.

Signed-off-by: Gurgel100 <baesae@xxxxxxxxxx>
---
 ext2/libext2/inode.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/ext2/libext2/inode.c b/ext2/libext2/inode.c
index e697308..a74d526 100644
--- a/ext2/libext2/inode.c
+++ b/ext2/libext2/inode.c
@@ -635,10 +635,11 @@ static int writeblk(ext2_inode_t* inode, uint64_t block, const void* buf)
     }
 
     b = fs->cache_block(fs->cache_handle, block_offset / block_size, 1);
-    memcpy(b->data, buf, block_size);
     if (!b) {
         return 0;
     }
+
+    memcpy(b->data, buf, block_size);
     fs->cache_block_free(b, 1);
 
     return 1;
-- 
2.7.4