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[5/5] ext4: unsigned int compared against zero

Message ID 3a2fb96b84ddc0421315de9dc4fb39df5da06376.1587713792.git.ashwinh@vmware.com
State Not Applicable
Headers show
Series Backport to 4.9- ext4: protect journal inode's blocks using block_validity | expand

Commit Message

Ashwin H April 29, 2020, 7:21 p.m. UTC
From: Colin Ian King <colin.king@canonical.com>

commit fbbbbd2f28aec991f3fbc248df211550fbdfd58c upstream.

There are two cases where u32 variables n and err are being checked
for less than zero error values, the checks is always false because
the variables are not signed. Fix this by making the variables ints.

Addresses-Coverity: ("Unsigned compared against 0")
Fixes: 345c0dbf3a30 ("ext4: protect journal inode's blocks using block_validity")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Signed-off-by: Ashwin H <ashwinh@vmware.com>
 fs/ext4/block_validity.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)
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diff --git a/fs/ext4/block_validity.c b/fs/ext4/block_validity.c
index 9c9c639..d31d93e 100644
--- a/fs/ext4/block_validity.c
+++ b/fs/ext4/block_validity.c
@@ -141,7 +141,8 @@  static int ext4_protect_reserved_inode(struct super_block *sb, u32 ino)
 	struct inode *inode;
 	struct ext4_sb_info *sbi = EXT4_SB(sb);
 	struct ext4_map_blocks map;
-	u32 i = 0, err = 0, num, n;
+	u32 i = 0, num;
+	int err = 0, n;
 	if ((ino < EXT4_ROOT_INO) ||
 	    (ino > le32_to_cpu(sbi->s_es->s_inodes_count)))