media: usb: dvd-usb: fix uninit-value bug in dibusb_read_eeprom_byte()
authorAnant Thazhemadam <anant.thazhemadam@gmail.com>
Mon, 7 Dec 2020 06:16:06 +0000 (07:16 +0100)
committerMauro Carvalho Chehab <mchehab+huawei@kernel.org>
Fri, 8 Oct 2021 11:54:43 +0000 (13:54 +0200)
commit899a61a3305d49e8a712e9ab20d0db94bde5929f
tree5980ac0299b878b7724e79a888f83340c211a91e
parentcefdc9510a16f59de6ff82ed90c841545ec0aa13
media: usb: dvd-usb: fix uninit-value bug in dibusb_read_eeprom_byte()

In dibusb_read_eeprom_byte(), if dibusb_i2c_msg() fails, val gets
assigned an value that's not properly initialized.
Using kzalloc() in place of kmalloc() for the buffer fixes this issue,
as the val can now be set to 0 in the event dibusb_i2c_msg() fails.

Reported-by: syzbot+e27b4fd589762b0b9329@syzkaller.appspotmail.com
Tested-by: syzbot+e27b4fd589762b0b9329@syzkaller.appspotmail.com
Signed-off-by: Anant Thazhemadam <anant.thazhemadam@gmail.com>
Signed-off-by: Sean Young <sean@mess.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
drivers/media/usb/dvb-usb/dibusb-common.c