In the Linux kernel, the following vulnerability has been resolved: ntfs3: fix uninit memory after failed miread in miformatnew Fix a KMSAN un-init bug found by syzkaller. ntfsgetbh() expects a buffer from sbgetblk(), that buffer may not be uptodate. We do not bring the buffer uptodate before setting it as uptodate. If the buffer were to not be uptodate, it could mean adding a buffer with un-init data to the mi record. Attempting to load that record will trigger KMSAN. Avoid this by setting the buffer as uptodate, if it’s not already, by overwriting it.