diff options
| author | Ivan Vecera <ivecera@redhat.com> | 2020-12-15 12:08:10 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-01-06 16:56:48 +0300 |
| commit | 95fcb69c491e976affb135a40cbd1d19b98bb02f (patch) | |
| tree | 0621455b871c5407fe4dee77677fa9c6227ae229 /net/ethtool | |
| parent | aeab3d7a04f8127fa81e3e763914122ad260c930 (diff) | |
| download | linux-95fcb69c491e976affb135a40cbd1d19b98bb02f.tar.xz | |
ethtool: fix error paths in ethnl_set_channels()
[ Upstream commit ef72cd3c5ce168829c6684ecb2cae047d3493690 ]
Fix two error paths in ethnl_set_channels() to avoid lock-up caused
but unreleased RTNL.
Fixes: e19c591eafad ("ethtool: set device channel counts with CHANNELS_SET request")
Reported-by: LiLiang <liali@redhat.com>
Signed-off-by: Ivan Vecera <ivecera@redhat.com>
Reviewed-by: Michal Kubecek <mkubecek@suse.cz>
Link: https://lore.kernel.org/r/20201215090810.801777-1-ivecera@redhat.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'net/ethtool')
| -rw-r--r-- | net/ethtool/channels.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/net/ethtool/channels.c b/net/ethtool/channels.c index 5635604cb9ba..25a9e566ef5c 100644 --- a/net/ethtool/channels.c +++ b/net/ethtool/channels.c @@ -194,8 +194,9 @@ int ethnl_set_channels(struct sk_buff *skb, struct genl_info *info) if (netif_is_rxfh_configured(dev) && !ethtool_get_max_rxfh_channel(dev, &max_rx_in_use) && (channels.combined_count + channels.rx_count) <= max_rx_in_use) { + ret = -EINVAL; GENL_SET_ERR_MSG(info, "requested channel counts are too low for existing indirection table settings"); - return -EINVAL; + goto out_ops; } /* Disabling channels, query zero-copy AF_XDP sockets */ @@ -203,8 +204,9 @@ int ethnl_set_channels(struct sk_buff *skb, struct genl_info *info) min(channels.rx_count, channels.tx_count); for (i = from_channel; i < old_total; i++) if (xsk_get_pool_from_qid(dev, i)) { + ret = -EINVAL; GENL_SET_ERR_MSG(info, "requested channel counts are too low for existing zerocopy AF_XDP sockets"); - return -EINVAL; + goto out_ops; } ret = dev->ethtool_ops->set_channels(dev, &channels); |