CVE-2021-47153

In the Linux kernel, the following vulnerability has been resolved:

i2c: i801: Don't generate an interrupt on bus reset

Now that the i2c-i801 driver supports interrupts, setting the KILL bit

in a attempt to recover from a timed out transaction triggers an

interrupt. Unfortunately, the interrupt handler (i801_isr) is not

prepared for this situation and will try to process the interrupt as

if it was signaling the end of a successful transaction. In the case

of a block transaction, this can result in an out-of-range memory

access.

This condition was reproduced several times by syzbot:

https://syzkaller.appspot.com/bug?extid=ed71512d469895b5b34e

https://syzkaller.appspot.com/bug?extid=8c8dedc0ba9e03f6c79e

https://syzkaller.appspot.com/bug?extid=c8ff0b6d6c73d81b610e

https://syzkaller.appspot.com/bug?extid=33f6c360821c399d69eb

https://syzkaller.appspot.com/bug?extid=be15dc0b1933f04b043a

https://syzkaller.appspot.com/bug?extid=b4d3fd1dfd53e90afd79

So disable interrupts while trying to reset the bus. Interrupts will

be enabled again for the following transaction.