From: Anant Thazhemadam anant.thazhemadam@gmail.com
stable inclusion from stable-5.10.80 commit b94e5bd540f4387fb7833509816ae02cc816a65a bugzilla: 185821 https://gitee.com/openeuler/kernel/issues/I4L7CG
Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=...
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[ Upstream commit 899a61a3305d49e8a712e9ab20d0db94bde5929f ]
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 Signed-off-by: Sasha Levin sashal@kernel.org Signed-off-by: Chen Jun chenjun102@huawei.com Reviewed-by: Weilong Chen chenweilong@huawei.com Acked-by: Weilong Chen chenweilong@huawei.com
Signed-off-by: Chen Jun chenjun102@huawei.com Signed-off-by: Zheng Zengkai zhengzengkai@huawei.com --- drivers/media/usb/dvb-usb/dibusb-common.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
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;