ext4: minor fix for ext4_split_extent_zeroout()

We missed storing the error which triggerd smatch warning:

	fs/ext4/extents.c:3369 ext4_split_extent_zeroout()
	warn: duplicate zero check 'err' (previous on line 3363)

fs/ext4/extents.c
    3361
    3362         err = ext4_ext_get_access(handle, inode, path + depth);
    3363         if (err)
    3364                 return err;
    3365
    3366         ext4_ext_mark_initialized(ex);
    3367
    3368         ext4_ext_dirty(handle, inode, path + depth);
--> 3369         if (err)
    3370                 return err;
    3371
    3372         return 0;
    3373 }

Fix it by correctly storing the err value from ext4_ext_dirty().

Link: https://lore.kernel.org/all/aYXvVgPnKltX79KE@stanley.mountain/
Reported-by: Dan Carpenter <dan.carpenter@linaro.org>
Fixes: a985e07c26455 ("ext4: refactor zeroout path and handle all cases")
Reviewed-by: Ritesh Harjani (IBM) <ritesh.list@gmail.com>
Signed-off-by: Ojaswin Mujoo <ojaswin@linux.ibm.com>
Reviewed-by: Zhang Yi <yi.zhang@huawei.com>
Reviewed-by: Baokun Li <libaokun@linux.alibaba.com>
Reviewed-by: Andreas Dilger <adilger@dilger.ca>
Link: https://patch.msgid.link/20260302143811.605174-1-ojaswin@linux.ibm.com
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Cc: stable@kernel.org

diff --git a/fs/ext4/extents.c b/fs/ext4/extents.c
index ae3804f36535aeca4009bfae992e1f2f665aded2..b41a44dc245c8b28dc43e915d395c5f8889d776b 100644 (file)
--- a/fs/ext4/extents.c
+++ b/fs/ext4/extents.c
@@ -3363,7 +3363,7 @@ static int ext4_split_extent_zeroout(handle_t *handle, struct inode *inode,
 
        ext4_ext_mark_initialized(ex);
 
-       ext4_ext_dirty(handle, inode, path + depth);
+       err = ext4_ext_dirty(handle, inode, path + depth);
        if (err)
                return err;