tree 3a1f4a7a5aa6f1257a7b2e70ea65767d49398968
parent 0153c758c5dddefb04f32f814b82d62c655fe9d4
author Darrick J. Wong <darrick.wong@oracle.com> 1566007094 -0700
committer Darrick J. Wong <darrick.wong@oracle.com> 1566007577 -0700

vfs: don't allow writes to swap files

Don't let userspace write to an active swap file because the kernel
effectively has a long term lease on the storage and things could get
seriously corrupted if we let this happen.

Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>