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| author | Arnaud Lecomte <contact@arnaud-lcm.com> | 2025-07-27 01:09:31 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2025-10-12 13:57:18 +0300 |
| commit | 4827bd6548e0f143868261f79077fd4b096bfcf8 (patch) | |
| tree | aac4efe8e1ca34adad4c5d2cdd747e0f18888dbf /scripts/gdb/linux/xarray.py | |
| parent | 647d6b8d22be12842fde6ed0c56859ebc615f21e (diff) | |
| download | linux-4827bd6548e0f143868261f79077fd4b096bfcf8.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/gdb/linux/xarray.py')
0 files changed, 0 insertions, 0 deletions