Description

In the Linux kernel, the following vulnerability has been resolved: fs/ntfs3: Initialize new folios before use KMSAN reports an uninitialized value in longest_match_std(), invoked from ntfs_compress_write(). When new folios are allocated without being marked uptodate and ni_read_frame() is skipped because the caller expects the frame to be completely overwritten, some reserved folios may remain only partially filled, leaving the rest memory uninitialized.

References 4

• git.kernel.org https://git.kernel.org/stable/c/41d79f8e2a36622d148719bf7c18b46ac1264284
• git.kernel.org https://git.kernel.org/stable/c/5a30cc03bde169ad558695b26da6ea7e55f6194a
• git.kernel.org https://git.kernel.org/stable/c/dd6c81527d097b3b0bf5a15c2fdc9657d045144c
• git.kernel.org https://git.kernel.org/stable/c/f223ebffa185cc8da934333c5a31ff2d4f992dc9

Remediation