github-mirror/linux
1
0
Fork 0
mirror of https://github.com/torvalds/linux.git synced 2026-07-27 01:32:21 +02:00
Code Issues Actions Packages Projects Releases Wiki Activity Graph

HID: hid-goodix-spi: validate report size to prevent stack buffer overflow

Browse Source 
goodix_hid_set_raw_report() builds a protocol frame in a 128-byte stack
buffer (tmp_buf), writing an 11-12 byte header followed by the
caller-supplied report data.  The HID core caps report size at
HID_MAX_BUFFER_SIZE (16384) by default, while the driver does not set
hid_ll_driver.max_buffer_size and performs no bounds checking before
copying the payload:

    memcpy(tmp_buf + tx_len, buf, len);

A hidraw SET_REPORT ioctl with a report larger than ~116 bytes
overflows the stack buffer.

Add a size check after constructing the header, rejecting reports that
would exceed the buffer capacity.

Discovered by Atuin - Automated Vulnerability Discovery Engine.

Fixes: 75e16c8ce2 ("HID: hid-goodix: Add Goodix HID-over-SPI driver")
Cc: stable@vger.kernel.org
Signed-off-by: Tianchu Chen <flynnnchen@tencent.com>
Reviewed-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Signed-off-by: Jiri Kosina <jkosina@suse.com>
This commit is contained in:
Tianchu Chen 2026-05-29 13:42:47 +00:00 committed by Jiri Kosina
parent b251598b8b
commit db0a0768d0
1 changed files with 3 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
drivers/hid/hid-goodix-spi.c
View File

@ -520,6 +520,9 @@ static int goodix_hid_set_raw_report(struct hid_device *hid,
memcpy(tmp_buf + tx_len, args, args_len);
tx_len += args_len;
if (tx_len + len > sizeof(tmp_buf))
return -EINVAL;
memcpy(tmp_buf + tx_len, buf, len);
tx_len += len;