CVE-2024-57991 Information

Description

In the Linux kernel the following vulnerability has been resolved:

wifi: rtw89: chan: fix soft lockup in rtw89_entity_recalc_mgnt_roles()

During rtw89_entity_recalc_mgnt_roles() there is a normalizing process which will re-order the list if an entry with target pattern is found. And once one is found should have aborted the list_for_each_entry. But break just aborted the inner for-loop. The outer list_for_each_entry still continues. Normally only the first entry will match the target pattern and the re-ordering will change nothing so there won’t be soft lockup. However in some special cases soft lockup would happen.

Fix it by goto fill to break from the list_for_each_entry.

The following is a sample of kernel log for this problem.

watchdog: BUG: soft lockup - CPU1 stuck for 26s! [wpa_supplicant:2055] […] RIP: 0010:rtw89_entity_recalc ([…] chan.c:392 chan.c:479) rtw89_core […]

Reference

https://git.kernel.org/stable/c/01d2d34e9fcc9897081c3c16a666f793c8a38c58 https://git.kernel.org/stable/c/223ba95fdcd3c6090e2bd51dce66abb6dd4f9df9 https://git.kernel.org/stable/c/e4790b3e314a4814f1680a5dc552031fb199b878