[dm-devel] [PATCH v3 5/6] kpartx: Don't leak memory when getblock returns NULL

[Benjamin Marzinski]

If a new block was allocated, but couldn't be filled, getblock will
discard it. When it does so, it needs to free the block to avoid leaking
memory. Found by coverity.

Signed-off-by: Benjamin Marzinski <bmarzins at redhat.com>
Reviewed-by: Martin Wilck <mwilck at suse.com>
---
 kpartx/kpartx.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/kpartx/kpartx.c b/kpartx/kpartx.c
index 8ff116b8..7bc64543 100644
--- a/kpartx/kpartx.c
+++ b/kpartx/kpartx.c
@@ -766,6 +766,8 @@ getblock (int fd, unsigned int blknr) {
 	if (read(fd, bp->block, secsz) != secsz) {
 		fprintf(stderr, "read error, sector %d\n", secnr);
 		blockhead = bp->next;
+		free(bp->block);
+		free(bp);
 		return NULL;
 	}
 
-- 
2.17.2