If there is a failure during copy_from_user, rtw_debugfs_set_single_input should return negative error code instead of a positive value count. Fix this bug by returning correct error code. Signed-off-by: Zhang Shurong <zhang_shurong@xxxxxxxxxxx> --- drivers/net/wireless/realtek/rtw88/debug.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/drivers/net/wireless/realtek/rtw88/debug.c b/drivers/net/wireless/realtek/rtw88/debug.c index d8e872ae4dda..f721205185cf 100644 --- a/drivers/net/wireless/realtek/rtw88/debug.c +++ b/drivers/net/wireless/realtek/rtw88/debug.c @@ -320,8 +320,11 @@ static ssize_t rtw_debugfs_set_single_input(struct file *filp, char tmp[32 + 1]; u32 input; int num; + int ret; - rtw_debugfs_copy_from_user(tmp, sizeof(tmp), buffer, count, 1); + ret = rtw_debugfs_copy_from_user(tmp, sizeof(tmp), buffer, count, 1); + if (ret < 0) + return ret; num = kstrtoint(tmp, 0, &input); -- 2.40.0
