CVE-2023-54066

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> media: dvb-usb-v2: gl861: Fix null-ptr-deref in gl861_i2c_master_xfer<br /> <br /> In gl861_i2c_master_xfer, msg is controlled by user. When msg[i].buf<br /> is null and msg[i].len is zero, former checks on msg[i].buf would be<br /> passed. Malicious data finally reach gl861_i2c_master_xfer. If accessing<br /> msg[i].buf[0] without sanity check, null ptr deref would happen.<br /> We add check on msg[i].len to prevent crash.<br /> <br /> Similar commit:<br /> commit 0ed554fd769a<br /> ("media: dvb-usb: az6027: fix null-ptr-deref in az6027_i2c_xfer()")