HID: ft260: fix a NULL pointer dereference in ft260_i2c_write

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The zero-length passed into the ft260_i2c_write() triggered the
NULL pointer dereference in the debug message on data[0] access.
Since the controller does not support a write of zero length,
let's not allow it.

Before:

$ sudo i2ctransfer -y 13 w0@0x51
Killed

After:

$ sudo i2ctransfer -y 13 w0@0x51
Error: Sending messages failed: Invalid argument

Reported-by: Enrik Berkhan <Enrik.Berkhan@inka.de>
Signed-off-by: Michael Zaidman <michael.zaidman@gmail.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>

...

This commit is contained in:

Michael Zaidman 2022-11-05 23:11:49 +02:00 • committed by Jiri Kosina

parent 4b3da6853a

commit c2500bdffe

1 changed files with 3 additions and 0 deletions

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drivers/hid/hid-ft260.c

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