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| author |   Fred Isaman <iisaman@netapp.com> | 2011-01-06 11:36:27 +0000 |
|---|---|---|
| committer |   Trond Myklebust <Trond.Myklebust@netapp.com> | 2011-01-06 14:46:32 -0500 |
| commit | fc1794c5b04f5322bad05385cd91b52ec85aab72 (patch) | |
| tree | 9d77a81dcdf6f858e20c8d8224e44dac13644dd5 /fs/nfs | |
| parent | pnfs: add layout to client list before sending rpc (diff) | |
| download | linux-dev-fc1794c5b04f5322bad05385cd91b52ec85aab72.tar.xz linux-dev-fc1794c5b04f5322bad05385cd91b52ec85aab72.zip | |
pnfs: check that partial LAYOUTGET return is ignored
Either a bad server reply, or our ignoring of multiple array segments in
a reply, can cause a reply to not meet our requirements. Ensure
that we ignore such replies.
Signed-off-by: Fred Isaman <iisaman@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Diffstat (limited to 'fs/nfs')
| -rw-r--r-- | fs/nfs/pnfs.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/fs/nfs/pnfs.c b/fs/nfs/pnfs.c index c00b673261f9..cd9906415a14 100644 --- a/fs/nfs/pnfs.c +++ b/fs/nfs/pnfs.c @@ -660,6 +660,17 @@ pnfs_layout_process(struct nfs4_layoutget *lgp) struct inode *ino = lo->plh_inode; int status = 0; + /* Verify we got what we asked for. + * Note that because the xdr parsing only accepts a single + * element array, this can fail even if the server is behaving + * correctly. + */ + if (lgp->args.range.iomode > res->range.iomode || + res->range.offset != 0 || + res->range.length != NFS4_MAX_UINT64) { + status = -EINVAL; + goto out; + } /* Inject layout blob into I/O device driver */ lseg = NFS_SERVER(ino)->pnfs_curr_ld->alloc_lseg(lo, res); if (!lseg || IS_ERR(lseg)) { |