ecryptfs: don't allow mmap when the lower fs doesn't support it

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commit f0fe970df3 upstream.

There are legitimate reasons to disallow mmap on certain files, notably
in sysfs or procfs.  We shouldn't emulate mmap support on file systems
that don't offer support natively.

CVE-2016-1583

Signed-off-by: Jeff Mahoney <jeffm@suse.com>
[tyhicks: clean up f_op check by using ecryptfs_file_to_lower()]
Signed-off-by: Tyler Hicks <tyhicks@canonical.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

...

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Jeff Mahoney 2016-07-05 17:32:30 -04:00 • committed by Greg Kroah-Hartman

parent ae159a0278

commit ed5c955e31

1 changed files with 14 additions and 1 deletions

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fs/ecryptfs/file.c

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