diff options
| author | Arnaud Lecomte <contact@arnaud-lcm.com> | 2025-07-27 01:09:31 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2025-10-12 14:01:03 +0300 |
| commit | 51627f45b304f2abfd5397ed39b639e70acf09b3 (patch) | |
| tree | 2e56d73ddcd894014e8f263eee51bcb71d23c814 /scripts/lib/kdoc/kdoc_parser.py | |
| parent | 4a6d6310349a525278afccdbce6d514cd16a3bac (diff) | |
| download | linux-51627f45b304f2abfd5397ed39b639e70acf09b3.tar.xz | |
hid: fix I2C read buffer overflow in raw_event() for mcp2221
commit b56cc41a3ae7323aa3c6165f93c32e020538b6d2 upstream.
As reported by syzbot, mcp2221_raw_event lacked
validation of incoming I2C read data sizes, risking buffer
overflows in mcp->rxbuf during multi-part transfers.
As highlighted in the DS20005565B spec, p44, we have:
"The number of read-back data bytes to follow in this packet:
from 0 to a maximum of 60 bytes of read-back bytes."
This patch enforces we don't exceed this limit.
Reported-by: syzbot+52c1a7d3e5b361ccd346@syzkaller.appspotmail.com
Closes: https://syzkaller.appspot.com/bug?extid=52c1a7d3e5b361ccd346
Tested-by: syzbot+52c1a7d3e5b361ccd346@syzkaller.appspotmail.com
Signed-off-by: Arnaud Lecomte <contact@arnaud-lcm.com>
Link: https://patch.msgid.link/20250726220931.7126-1-contact@arnaud-lcm.com
Signed-off-by: Benjamin Tissoires <bentiss@kernel.org>
Signed-off-by: Romain Sioen <romain.sioen@microchip.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'scripts/lib/kdoc/kdoc_parser.py')
0 files changed, 0 insertions, 0 deletions