| Message ID | tencent_C77B782B54A36A4930DC5CD7666E19801D0A@qq.com |
|---|---|
| State | New |
| Headers | show |
| Series | [01/10] wifi: rtw88: fix incorrect error codes in rtw_debugfs_set_write_reg | expand |
diff --git a/drivers/net/wireless/realtek/rtw88/debug.c b/drivers/net/wireless/realtek/rtw88/debug.c index bc41c5a7acaf..3c3350bb2855 100644 --- a/drivers/net/wireless/realtek/rtw88/debug.c +++ b/drivers/net/wireless/realtek/rtw88/debug.c @@ -201,13 +201,16 @@ static ssize_t rtw_debugfs_set_read_reg(struct file *filp, char tmp[32 + 1]; u32 addr, len; int num; + int ret; - rtw_debugfs_copy_from_user(tmp, sizeof(tmp), buffer, count, 2); + ret = rtw_debugfs_copy_from_user(tmp, sizeof(tmp), buffer, count, 2); + if (ret < 0) + return ret; num = sscanf(tmp, "%x %x", &addr, &len); if (num != 2) - return count; + return -EINVAL; if (len != 1 && len != 2 && len != 4) { rtw_warn(rtwdev, "read reg setting wrong len\n");
If there is a failure during copy_from_user or user-provided data buffer is invalid, rtw_debugfs_set_read_reg 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@foxmail.com> --- drivers/net/wireless/realtek/rtw88/debug.c | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-)