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| author | Anant Thazhemadam <anant.thazhemadam@gmail.com> | 2020-12-07 07:16:06 +0100 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab+huawei@kernel.org> | 2021-10-08 13:54:43 +0200 |
| commit | 899a61a3305d49e8a712e9ab20d0db94bde5929f (patch) | |
| tree | 5980ac0299b878b7724e79a888f83340c211a91e /drivers/media/usb | |
| parent | cefdc9510a16f59de6ff82ed90c841545ec0aa13 (diff) | |
| download | linux-899a61a3305d49e8a712e9ab20d0db94bde5929f.tar.bz2 | |
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>
Diffstat (limited to 'drivers/media/usb')
| -rw-r--r-- | drivers/media/usb/dvb-usb/dibusb-common.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/media/usb/dvb-usb/dibusb-common.c b/drivers/media/usb/dvb-usb/dibusb-common.c index 02b51d1a1b67..aff60c10cb0b 100644 --- a/drivers/media/usb/dvb-usb/dibusb-common.c +++ b/drivers/media/usb/dvb-usb/dibusb-common.c @@ -223,7 +223,7 @@ int dibusb_read_eeprom_byte(struct dvb_usb_device *d, u8 offs, u8 *val) u8 *buf; int rc; - buf = kmalloc(2, GFP_KERNEL); + buf = kzalloc(2, GFP_KERNEL); if (!buf) return -ENOMEM; |