Commit 027b6ca0 authored Dec 23, 2008 by Trond Myklebust

NFSv4: Fix an infinite loop in the NFS state recovery code



Marten Gajda <marten.gajda@fernuni-hagen.de> states:

I tracked the problem down to the function nfs4_do_open_expired.
Within this function _nfs4_open_expired is called and may return
-NFS4ERR_DELAY. When a further call to _nfs4_open_expired is
executed and does not return -NFS4ERR_DELAY the "exception.retry"
variable is not reset to 0, causing the loop to iterate again
(and as long as err != -NFS4ERR_DELAY, probably forever)

Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>

parent 6dcd3926

fs/nfs/nfs4proc.c

+3 −2

Original line number	Diff line number	Diff line
		@@ -1104,7 +1104,8 @@ static inline int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4

		do {
		err = _nfs4_open_expired(ctx, state);
		if (err == -NFS4ERR_DELAY)
		if (err != -NFS4ERR_DELAY)
		break;
		nfs4_handle_exception(server, err, &exception);
		} while (exception.retry);
		return err;