search for: ms_invalidate

...isit <URL:http://www.freebsd.org/security/>. I. Background The msync(2) system call is used by applications to request that modified memory pages are written to permanent storage. II. Problem Description Programming errors in the implementation of the msync(2) system call involving the MS_INVALIDATE operation lead to cache consistency problems between the virtual memory system and on-disk contents. III. Impact In some situations, a user with read access to a file may be able to prevent changes to that file from being committed to disk. IV. Workaround There is no workaround. V. Solution...

...isit <URL:http://www.freebsd.org/security/>. I. Background The msync(2) system call is used by applications to request that modified memory pages are written to permanent storage. II. Problem Description Programming errors in the implementation of the msync(2) system call involving the MS_INVALIDATE operation lead to cache consistency problems between the virtual memory system and on-disk contents. III. Impact In some situations, a user with read access to a file may be able to prevent changes to that file from being committed to disk. IV. Workaround There is no workaround. V. Solution...