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vfs: Add sb_rdonly(sb) to query the MS_RDONLY flag on s_flags
authorDavid Howells <dhowells@redhat.com>
Mon, 17 Jul 2017 07:45:34 +0000 (08:45 +0100)
committerBrian Maly <brian.maly@oracle.com>
Tue, 5 Mar 2019 19:59:32 +0000 (14:59 -0500)
commitafd8ee1656da7856792da9ae7c9bac0bd971db7b
tree29a9959485f97eb475a2e5826a93472d7445f3fdtree
parente2ebc9cc109fc97146e2a3ac93b13ffd0458ff85commit | diff
vfs: Add sb_rdonly(sb) to query the MS_RDONLY flag on s_flags

Add an sb_rdonly() function to query the MS_RDONLY flag on sb->s_flags
preparatory to providing an SB_RDONLY flag.

Signed-off-by: David Howells <dhowells@redhat.com>
(cherry picked from commit 94e92e7ac90d06e1e839e112d3ae80b2457dbdd7)

Orabug: 29428607
CVE: CVE-2018-10878

Signed-off-by: John Donnelly <John.P.Donnelly@oracle.com>
Reviewed-by: Darren Kenny <darren.kenny@oracle.com>
Signed-off-by: Brian Maly <brian.maly@oracle.com>
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