From: Eran Ben Elisha Date: Tue, 17 Jan 2017 17:19:17 +0000 (+0200) Subject: net: ethtool: Initialize buffer when querying device channel settings X-Git-Tag: v4.10-rc6~8^2~58^2~2 X-Git-Url: https://asedeno.scripts.mit.edu/gitweb/?a=commitdiff_plain;h=31a86d137219373c3222ca5f4f912e9a4d8065bb;p=linux.git net: ethtool: Initialize buffer when querying device channel settings Ethtool channels respond struct was uninitialized when querying device channel boundaries settings. As a result, unreported fields by the driver hold garbage. This may cause sending unsupported params to driver. Fixes: 8bf368620486 ('ethtool: ensure channel counts are within bounds ...') Signed-off-by: Eran Ben Elisha Signed-off-by: Tariq Toukan CC: John W. Linville Signed-off-by: David S. Miller --- diff --git a/net/core/ethtool.c b/net/core/ethtool.c index e23766c7e3ba..236a21e3c878 100644 --- a/net/core/ethtool.c +++ b/net/core/ethtool.c @@ -1712,7 +1712,7 @@ static noinline_for_stack int ethtool_get_channels(struct net_device *dev, static noinline_for_stack int ethtool_set_channels(struct net_device *dev, void __user *useraddr) { - struct ethtool_channels channels, max; + struct ethtool_channels channels, max = { .cmd = ETHTOOL_GCHANNELS }; u32 max_rx_in_use = 0; if (!dev->ethtool_ops->set_channels || !dev->ethtool_ops->get_channels)