CVE-2021-47153

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> i2c: i801: Don&amp;#39;t generate an interrupt on bus reset<br /> <br /> Now that the i2c-i801 driver supports interrupts, setting the KILL bit<br /> in a attempt to recover from a timed out transaction triggers an<br /> interrupt. Unfortunately, the interrupt handler (i801_isr) is not<br /> prepared for this situation and will try to process the interrupt as<br /> if it was signaling the end of a successful transaction. In the case<br /> of a block transaction, this can result in an out-of-range memory<br /> access.<br /> <br /> This condition was reproduced several times by syzbot:<br /> https://syzkaller.appspot.com/bug?extid=ed71512d469895b5b34e<br /> https://syzkaller.appspot.com/bug?extid=8c8dedc0ba9e03f6c79e<br /> https://syzkaller.appspot.com/bug?extid=c8ff0b6d6c73d81b610e<br /> https://syzkaller.appspot.com/bug?extid=33f6c360821c399d69eb<br /> https://syzkaller.appspot.com/bug?extid=be15dc0b1933f04b043a<br /> https://syzkaller.appspot.com/bug?extid=b4d3fd1dfd53e90afd79<br /> <br /> So disable interrupts while trying to reset the bus. Interrupts will<br /> be enabled again for the following transaction.