NFS: Directory page cache pages need to be locked when read

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commit 114de38225 upstream.

When a NFS directory page cache page is removed from the page cache,
its contents are freed through a call to nfs_readdir_clear_array().
To prevent the removal of the page cache entry until after we've
finished reading it, we must take the page lock.

Fixes: 11de3b11e0 ("NFS: Fix a memory leak in nfs_readdir")
Cc: stable@vger.kernel.org # v2.6.37+
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
Reviewed-by: Benjamin Coddington <bcodding@redhat.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

...

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Trond Myklebust 2020-02-02 17:53:54 -05:00 • committed by Greg Kroah-Hartman

parent 8c19c882c6

commit f977c61c23

1 changed files with 19 additions and 11 deletions

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fs/nfs/dir.c

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