ext4: make variable "count" signed

commit bc75a6eb856cb1507fa907bf6c1eda91b3fef52f upstream.

Since dx_make_map() may return -EFSCORRUPTED now, so change "count" to
be a signed integer so we can correctly check for an error code returned
by dx_make_map().

Fixes: 46c116b920eb ("ext4: verify dir block before splitting it")
Cc: stable@kernel.org
Signed-off-by: Ding Xiang <dingxiang@cmss.chinamobile.com>
Link: https://lore.kernel.org/r/20220530100047.537598-1-dingxiang@cmss.chinamobile.com
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/fs/ext4/namei.c b/fs/ext4/namei.c
index e9cba12e5e1282e48044ca03ef3d8726a801e8d6..4f0420b1ff3ecc6889dbf7ecbfd2debc4d4b4cb6 100644 (file)
--- a/fs/ext4/namei.c
+++ b/fs/ext4/namei.c
@@ -1929,7 +1929,8 @@ static struct ext4_dir_entry_2 *do_split(handle_t *handle, struct inode *dir,
                        struct dx_hash_info *hinfo)
 {
        unsigned blocksize = dir->i_sb->s_blocksize;
-       unsigned count, continued;
+       unsigned continued;
+       int count;
        struct buffer_head *bh2;
        ext4_lblk_t newblock;
        u32 hash2;