cifs: handle errors from coalesce_t2
cifs_demultiplex_thread calls coalesce_t2 to try and merge follow-on t2 responses into the original mid buffer. coalesce_t2 however can return errors, but the caller doesn't handle that situation properly. Fix the thread to treat such a case as it would a malformed packet. Mark the mid as being malformed and issue the callback. Cc: stable@kernel.org Acked-by: NDavid Howells <dhowells@redhat.com> Signed-off-by: NJeff Layton <jlayton@redhat.com> Signed-off-by: NSteve French <sfrench@us.ibm.com>
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