From: Trond Myklebust trond.myklebust@hammerspace.com
commit 8e04fdfadda75a849c649f7e50fe7d97772e1fcb upstream.
mirror->mirror_ds can be NULL if uninitialised, but can contain a PTR_ERR() if call to GETDEVICEINFO failed.
Fixes: 65990d1afbd2 ("pNFS/flexfiles: Fix a deadlock on LAYOUTGET") Signed-off-by: Trond Myklebust trond.myklebust@hammerspace.com Cc: stable@vger.kernel.org # 4.10+ Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
--- fs/nfs/flexfilelayout/flexfilelayoutdev.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
--- a/fs/nfs/flexfilelayout/flexfilelayoutdev.c +++ b/fs/nfs/flexfilelayout/flexfilelayoutdev.c @@ -307,7 +307,7 @@ int ff_layout_track_ds_error(struct nfs4 if (status == 0) return 0;
- if (mirror->mirror_ds == NULL) + if (IS_ERR_OR_NULL(mirror->mirror_ds)) return -EINVAL;
dserr = kmalloc(sizeof(*dserr), gfp_flags);