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| author | Florian Pradines <florian.pradines@gmail.com> | 2026-05-09 12:45:17 +0300 |
|---|---|---|
| committer | Jiri Kosina <jkosina@suse.com> | 2026-05-12 18:48:16 +0300 |
| commit | f097d246677b03db814c5862f368cea341b76a00 (patch) | |
| tree | 0c99ca034b43977c21004cdd662f93cdd5d530bb /tools/lib/python | |
| parent | 5f90dcfa8dc32a488581b78e575cdd7808ba5c78 (diff) | |
| download | linux-f097d246677b03db814c5862f368cea341b76a00.tar.xz | |
HID: mcp2221: fix OOB write in mcp2221_raw_event()
mcp2221_raw_event() copies device-supplied data into mcp->rxbuf at
offset rxbuf_idx without checking that the copy fits within the
destination buffer. A device responding with up to 60 bytes to a
small I2C/SMBus read can overflow the buffer.
Add a rxbuf_size field to struct mcp2221, set it alongside rxbuf in
mcp_i2c_smbus_read(), and check rxbuf_idx + data[3] <= rxbuf_size
before the memcpy.
Reported-by: Benoît Sevens <bsevens@google.com>
Signed-off-by: Florian Pradines <florian.pradines@gmail.com>
Signed-off-by: Jiri Kosina <jkosina@suse.com>
Diffstat (limited to 'tools/lib/python')
0 files changed, 0 insertions, 0 deletions