[lvc-project] [PATCH] ceph: fix possible integer overflow in ceph_zero_objects()

[Dmitry Kandybka]

In 'ceph_zero_objects', promote 'object_size' to 'u64' to avoid possible
integer overflow.
Compile tested only.

Found by Linux Verification Center (linuxtesting.org) with SVACE.

Signed-off-by: Dmitry Kandybka <d.kandybka at gmail.com>
---
 fs/ceph/file.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/fs/ceph/file.c b/fs/ceph/file.c
index 851d70200c6b..a7254cab44cc 100644
--- a/fs/ceph/file.c
+++ b/fs/ceph/file.c
@@ -2616,7 +2616,7 @@ static int ceph_zero_objects(struct inode *inode, loff_t offset, loff_t length)
 	s32 stripe_unit = ci->i_layout.stripe_unit;
 	s32 stripe_count = ci->i_layout.stripe_count;
 	s32 object_size = ci->i_layout.object_size;
-	u64 object_set_size = object_size * stripe_count;
+	u64 object_set_size = (u64) object_size * stripe_count;
 	u64 nearly, t;
 
 	/* round offset up to next period boundary */
-- 
2.43.5