path: root/drivers
diff options
authorDan Carpenter <>2021-03-03 13:59:12 +0300
committerJens Axboe <>2021-03-03 06:48:44 -0700
commit77516d25f54912a7baedeeac1b1b828b6f285152 (patch)
tree1d3c284e63bb6d024fe43b37ee002dd2241ccf5b /drivers
parent4168a8d27ed3a00f160e7f885c956f060d2a0741 (diff)
rsxx: Return -EFAULT if copy_to_user() fails
The copy_to_user() function returns the number of bytes remaining but we want to return -EFAULT to the user if it can't complete the copy. The "st" variable only holds zero on success or negative error codes on failure so the type should be int. Fixes: 36f988e978f8 ("rsxx: Adding in debugfs entries.") Signed-off-by: Dan Carpenter <> Signed-off-by: Jens Axboe <>
Diffstat (limited to 'drivers')
1 files changed, 5 insertions, 3 deletions
diff --git a/drivers/block/rsxx/core.c b/drivers/block/rsxx/core.c
index 63f549889f87..5ac1881396af 100644
--- a/drivers/block/rsxx/core.c
+++ b/drivers/block/rsxx/core.c
@@ -165,15 +165,17 @@ static ssize_t rsxx_cram_read(struct file *fp, char __user *ubuf,
struct rsxx_cardinfo *card = file_inode(fp)->i_private;
char *buf;
- ssize_t st;
+ int st;
buf = kzalloc(cnt, GFP_KERNEL);
if (!buf)
return -ENOMEM;
st = rsxx_creg_read(card, CREG_ADD_CRAM + (u32)*ppos, cnt, buf, 1);
- if (!st)
- st = copy_to_user(ubuf, buf, cnt);
+ if (!st) {
+ if (copy_to_user(ubuf, buf, cnt))
+ st = -EFAULT;
+ }
if (st)
return st;