CVS commit: src/sys/dev/usb

["Pierre Pronchery" <khorben%netbsd.org@localhost>]

Module Name:    src
Committed By:   khorben
Date:           Fri Dec  8 14:46:18 UTC 2017

Modified Files:
        src/sys/dev/usb: usb_subr.c

Log Message:
Be more defensive towards malicious USB devices

This avoids potential panics due to 0-sized memory allocation attempts,
which could be triggered by malicious USB devices.

Tested on NetBSD/amd64 with a Sony Xperia X (SailfishOS).

Based on an initial patch by Nick Hudson <skrll%NetBSD.org@localhost>, thanks!

Fixes PR kern/52383.

XXX pull-up to netbsd-7, netbsd-8

LGTM xtos@


To generate a diff of this commit:
cvs rdiff -u -r1.221 -r1.222 src/sys/dev/usb/usb_subr.c

Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.