CVE-2024-57943 Information

Description

In the Linux kernel the following vulnerability has been resolved:

exfat: fix the new buffer was not zeroed before writing

Before writing if a buffer_head marked as new its data must be zeroed otherwise uninitialized data in the page cache will be written.

So this commit uses folio_zero_new_buffers() to zero the new buffers before ->write_end().

Reference

https://git.kernel.org/stable/c/942c6f91ab8d82a41650e717940b4e577173762f https://git.kernel.org/stable/c/98e2fb26d1a9eafe79f46d15d54e68e014d81d8c