From: Colin Ian King <[email protected]>
[ Upstream commit 88b2e9b06381551b707d980627ad0591191f7a2d ]
The 64 bit ino is being compared to the product of two u32 values,
however, the multiplication is being performed using a 32 bit multiply so
there is a potential of an overflow. To be fully safe, cast uspi->s_ncg
to a u64 to ensure a 64 bit multiplication occurs to avoid any chance of
overflow.
Fixes: f3e2a520f5fb ("ufs: NFS support")
Signed-off-by: Colin Ian King <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Cc: Evgeniy Dushistov <[email protected]>
Cc: Alexey Dobriyan <[email protected]>
Link: http://lkml.kernel.org/r/[email protected]
Addresses-Coverity: ("Unintentional integer overflow")
Signed-off-by: Linus Torvalds <[email protected]>
Signed-off-by: Sasha Levin <[email protected]>
---
fs/ufs/super.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/fs/ufs/super.c b/fs/ufs/super.c
index a4e07e910f1b4..6e59e45d7bfbd 100644
--- a/fs/ufs/super.c
+++ b/fs/ufs/super.c
@@ -100,7 +100,7 @@ static struct inode *ufs_nfs_get_inode(struct super_block
*sb, u64 ino, u32 gene
struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
struct inode *inode;
- if (ino < UFS_ROOTINO || ino > uspi->s_ncg * uspi->s_ipg)
+ if (ino < UFS_ROOTINO || ino > (u64)uspi->s_ncg * uspi->s_ipg)
return ERR_PTR(-ESTALE);
inode = ufs_iget(sb, ino);
--
2.25.1
