CVE-2022-48780 Information

Description

In the Linux kernel the following vulnerability has been resolved:

net/smc: Avoid overwriting the copies of clcsock callback functions

The callback functions of clcsock will be saved and replaced during the fallback. But if the fallback happens more than once then the copies of these callback functions will be overwritten incorrectly resulting in a loop call issue:

clcsk->sk_error_report |- smc_fback_error_report() <——————————| |- smc_fback_forward_wakeup() | (loop) |- clcsock_callback() (incorrectly overwritten) | |- smc->clcsk_error_report() ——————|

So this patch fixes the issue by saving these function pointers only once in the fallback and avoiding overwriting.

Reference

https://git.kernel.org/stable/c/7de7ba7a8bd4fde0141de8674c13514d0072f0e6 https://git.kernel.org/stable/c/f00b6c976ae0dfbd9b891175f713f59095d23842 https://git.kernel.org/stable/c/1de9770d121ee9294794cca0e0be8fbfa0134ee8