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authorArnd Bergmann <arnd@arndb.de>2016-11-22 21:50:52 +0100
committerAnna Schumaker <Anna.Schumaker@Netapp.com>2016-11-22 16:11:44 -0500
commitd55b352b01bc78fbc3d1bb650140668b87e58bf9 (patch)
tree8e0258155cc4005612bd9868979858a7c108b10f
parentd75a6a0e3933acbba44e4ad8d8f3c4d4f76b6e03 (diff)
downloadlinux-d55b352b01bc78fbc3d1bb650140668b87e58bf9.tar.bz2
NFSv4.x: hide array-bounds warning
A correct bugfix introduced a harmless warning that shows up with gcc-7: fs/nfs/callback.c: In function 'nfs_callback_up': fs/nfs/callback.c:214:14: error: array subscript is outside array bounds [-Werror=array-bounds] What happens here is that the 'minorversion == 0' check tells the compiler that we assume minorversion can be something other than 0, but when CONFIG_NFS_V4_1 is disabled that would be invalid and result in an out-of-bounds access. The added check for IS_ENABLED(CONFIG_NFS_V4_1) tells gcc that this really can't happen, which makes the code slightly smaller and also avoids the warning. The bugfix that introduced the warning is marked for stable backports, we want this one backported to the same releases. Fixes: 98b0f80c2396 ("NFSv4.x: Fix a refcount leak in nfs_callback_up_net") Cc: stable@vger.kernel.org # v3.7+ Signed-off-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
-rw-r--r--fs/nfs/callback.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/fs/nfs/callback.c b/fs/nfs/callback.c
index 532d8e242d4d..484bebc20bca 100644
--- a/fs/nfs/callback.c
+++ b/fs/nfs/callback.c
@@ -197,7 +197,7 @@ static int nfs_callback_up_net(int minorversion, struct svc_serv *serv,
}
ret = -EPROTONOSUPPORT;
- if (minorversion == 0)
+ if (!IS_ENABLED(CONFIG_NFS_V4_1) || minorversion == 0)
ret = nfs4_callback_up_net(serv, net);
else if (xprt->ops->bc_up)
ret = xprt->ops->bc_up(serv, net);