Input: iforce - validate input packet lengths

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commit 5751c781d3 upstream.

iforce_process_packet() reads fixed fields from joystick, wheel and
status packets without first checking their lengths. In particular, the
shared hats-and-buttons helper unconditionally reads data[6]. The status
tail is a sequence of 16-bit effect addresses, but an incomplete final
address is also consumed. A successful zero-length USB URB additionally
reads the packet ID before the common parser is called.

Reject the zero-length USB transfer, require the seven-byte joystick and
wheel prefixes and the two-byte status prefix, and consume only complete
status-tail addresses.

Signed-off-by: Pengpeng Hou <pengpeng@iscas.ac.cn>
Link: https://patch.msgid.link/20260720115018.75045-1-pengpeng@iscas.ac.cn
Cc: stable@vger.kernel.org
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

...

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Pengpeng Hou 2026-07-24 20:46:27 -07:00 • committed by Greg Kroah-Hartman

parent 000a5e1ac9

commit 609be40988

2 changed files with 13 additions and 1 deletions

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11

drivers/input/joystick/iforce/iforce-packets.c

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3

drivers/input/joystick/iforce/iforce-usb.c

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