From f4a3dc91283f5ab016f166ffec32f9c08e0ba174 Mon Sep 17 00:00:00 2001 From: Andrey Konovalov Date: Thu, 11 Apr 2019 15:44:07 +0200 Subject: all: add basic USB fuzzing support This commits implements 4 syzcalls: syz_usb_connect, syz_usb_io_control, syz_usb_ep_write and syz_usb_disconnect. Those syzcalls are used to emit USB packets through a custom GadgetFS-like interface (currently exposed at /sys/kernel/debug/usb-fuzzer), which requires special kernel patches. USB fuzzing support is quite basic, as it mostly covers only the USB device enumeration process. Even though the syz_usb_ep_write syzcall does allow to communicate with USB endpoints after the device has been enumerated, no coverage is collected from that code yet. --- sys/linux/init.go | 23 ++++++++++++----------- 1 file changed, 12 insertions(+), 11 deletions(-) (limited to 'sys/linux/init.go') diff --git a/sys/linux/init.go b/sys/linux/init.go index 0d4533686..e694cce09 100644 --- a/sys/linux/init.go +++ b/sys/linux/init.go @@ -50,17 +50,18 @@ func InitTarget(target *prog.Target) { target.SanitizeCall = arch.sanitizeCall target.SpecialTypes = map[string]func(g *prog.Gen, typ prog.Type, old prog.Arg) ( prog.Arg, []*prog.Call){ - "timespec": arch.generateTimespec, - "timeval": arch.generateTimespec, - "sockaddr_alg": arch.generateSockaddrAlg, - "alg_name": arch.generateAlgName, - "alg_aead_name": arch.generateAlgAeadName, - "alg_hash_name": arch.generateAlgHashName, - "alg_blkcipher_name": arch.generateAlgBlkcipherhName, - "ipt_replace": arch.generateIptables, - "ip6t_replace": arch.generateIptables, - "arpt_replace": arch.generateArptables, - "ebt_replace": arch.generateEbtables, + "timespec": arch.generateTimespec, + "timeval": arch.generateTimespec, + "sockaddr_alg": arch.generateSockaddrAlg, + "alg_name": arch.generateAlgName, + "alg_aead_name": arch.generateAlgAeadName, + "alg_hash_name": arch.generateAlgHashName, + "alg_blkcipher_name": arch.generateAlgBlkcipherhName, + "ipt_replace": arch.generateIptables, + "ip6t_replace": arch.generateIptables, + "arpt_replace": arch.generateArptables, + "ebt_replace": arch.generateEbtables, + "usb_device_descriptor": arch.generateUsbDeviceDescriptor, } // TODO(dvyukov): get rid of this, this must be in descriptions. target.StringDictionary = []string{ -- cgit mrf-deployment