[PATCH v3 31/38] nfsd: allow nfsd4_encode_fattr4_change() to work with no export
From: Jeff Layton <jlayton@kernel.org>
Date: 2025-09-24 18:08:02
Also in:
linux-cifs, linux-doc, linux-fsdevel, linux-nfs, linux-unionfs, linux-xfs, lkml, netfs
Subsystem:
filesystems (vfs and infrastructure), kernel nfsd, sunrpc, and lockd servers, the rest · Maintainers:
Alexander Viro, Christian Brauner, Chuck Lever, Jeff Layton, Linus Torvalds
In the context of a CB_NOTIFY callback, we may not have easy access to a svc_export. nfsd will not currently grant a delegation on a the V4 root however, so this should be safe. Signed-off-by: Jeff Layton <jlayton@kernel.org> --- fs/nfsd/nfs4xdr.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/fs/nfsd/nfs4xdr.c b/fs/nfsd/nfs4xdr.c
index 9a463f9c8a67704d90d1551b7de59e4e89a2a81d..d1eba4bd8be243022f89f6ac58067c5469a8feba 100644
--- a/fs/nfsd/nfs4xdr.c
+++ b/fs/nfsd/nfs4xdr.c@@ -3027,7 +3027,7 @@ static __be32 nfsd4_encode_fattr4_change(struct xdr_stream *xdr, { const struct svc_export *exp = args->exp; - if (unlikely(exp->ex_flags & NFSEXP_V4ROOT)) { + if (exp && unlikely(exp->ex_flags & NFSEXP_V4ROOT)) { u32 flush_time = convert_to_wallclock(exp->cd->flush_time); if (xdr_stream_encode_u32(xdr, flush_time) != XDR_UNIT)
--
2.51.0