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X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: =?us-ascii?Q?GBFcEtX15rpC3eSZ+BFkTITOAmR0TUuO5ZaKCUvlRGPEDQnRLqIgMnhqr+tm?= =?us-ascii?Q?NBNDhe2pEk8d6zB97+DsobSXvZfwM2exn6LdsqBTWhPjSG/qoHS6XF13P6Ok?= =?us-ascii?Q?msly2RbDwrVdlca2NrkIF+a0cfgKVkHMpDgXHLfr6ImeA9DXlyU9OxM/4lvC?= =?us-ascii?Q?oNhFwfnGz92dNdvD64R+obz6QoN6ZZpazm+/mUN1ttcE7oaOnrQugOJ2Ij8U?= =?us-ascii?Q?fL6xOQDmGKNr/9SvDzF2i6nygPZQ3yhVFe11WiU2p3HNxdIwj4Odc4m34YFx?= =?us-ascii?Q?CNXgjGGMIwNUX0Z6lcaItShI3X2axSCaH6AgcmhJs8tMAxd47J18q+WdAwI5?= =?us-ascii?Q?rUt331lajJ54TbUmfQOZsThWXy7hdmikxB9N2gPNYoGS1S8q+lsskiQAxyQT?= =?us-ascii?Q?L009yMXNpxvsyCaLfZS5slfUMd9hen5X8NqSfkICxGfadPCp3ID29I5SK0AQ?= =?us-ascii?Q?eH4cN2sEWuXhPpd0Bq1wuEEqhXTb6cPU9oDpipMAxRKr5IZ191k/K7HorrGM?= =?us-ascii?Q?qzk2icS8kl0+VCZLadykDko0O8ZhLqjhwMhxOkkU+GPGjt0AcS8W2j4klCWS?= =?us-ascii?Q?HF8iXCpOR+LU6B6RtIm94yw8oskgRcGZ+fEQ93XcVqPrhz6wMrncscK70O+1?= =?us-ascii?Q?TEElvIeKkHgEHKf5N+agUUv9c3yaubB1xBdODDin1wfwHzafY5Hhp3Ba5lvO?= =?us-ascii?Q?TSB111vohI0MN3jgrq2L6+8zFHFzfLizd0kHb/ke2XZ3fNQswttGPTmQbear?= =?us-ascii?Q?fg+jIPKaxmqJE58wSoMGQq1ttEBFW4WmLdT6CsapIZohYaDB8GPhXa9V0Nsy?= =?us-ascii?Q?yZEQjmY1wS2IoGq2jJA3i3u8yCGx8INvFH1ikTeAxdfbnSExGYAX17X0+jW2?= =?us-ascii?Q?ND9nIKpQFLNJo+MogjIWXHJJLn2j2rMlnoIV1fSPi22tAS11xko9FcFV3v48?= =?us-ascii?Q?nnu7NXXs55lZMNio4Acsc5pYM8HlM1NLzgOm0l6JxXAZAK4jaSoEJTZjtq0F?= =?us-ascii?Q?xcu5z/CfEtvesyqd8cT/Uo9MCkoSKPZUHL4Tj0FuYMfKypcBvnh1mZkq9iix?= =?us-ascii?Q?IYyauw0gj6AiespMlnZCNzTsppeymNBeN/xc3KvKYvD9vO1XTFebaiRucfLY?= =?us-ascii?Q?gjF5WNqbx6GvJgLRveipJmNyA2kmVLBq/7YwEq2SparyPxp5wOYe10nVHkto?= =?us-ascii?Q?iJnBsdNSfTrq75Omxbc9k6SBmPyJFHWfEs2kN0F7q1SPHDAg/CVN5f+5JnBu?= =?us-ascii?Q?S7WTMdAB9OU86XUs2pWYY/fxGd+rh+gBFUrmRJe41cXYQK4wCdqoNZFyAFYi?= =?us-ascii?Q?M3fVGpQHK6JIe2+mNdhDlR6KK9UY39I/CoNv3VJHFVrZpSrDqfCSIGcfCc6Q?= =?us-ascii?Q?CESTwLNiBsCtPfl3wOGMe+ZxjeiqHzvneKt3+izrrjDHXbj/f0ikjQa/75bX?= =?us-ascii?Q?ycYOahYhseGB7C0Nh7kcE2UJxenITXcSquDFF2kGMXZ+RqlHZUdIBxWqI4Q4?= =?us-ascii?Q?bk1eX6ZaWltiRrsw/JUS3DpyekY1r05Z7r0h+Mv21+3f/norSFbM6OarAU5G?= =?us-ascii?Q?x8TxKOuN6BnMLhzTm55jHgHSVGxXsjL91O8lX6hmd71dLWvcXHBDtqE0cXyi?= =?us-ascii?Q?hN2MZoQ8xP2ApQ1CcgiwXDk=3D?= X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-Network-Message-Id: 6af9a791-67c9-482b-b397-08d9fc6a3b9f X-MS-Exchange-CrossTenant-AuthSource: DM6PR12MB4337.namprd12.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 02 Mar 2022 16:32:24.7486 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: 43083d15-7273-40c1-b7db-39efd9ccc17a X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: xe2If2tiXEAM+xhcBKWWomtSjTb7d5vxAcgKaWfv1HcYmZxRsIKG5YqiKOpkBASoX3q+0+1c+s8f+15tf6ak1Q== X-MS-Exchange-Transport-CrossTenantHeadersStamped: CY4PR12MB1942 Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org From: Petr Machata Obtaining stats for the IFLA_STATS_LINK_OFFLOAD_XSTATS nest involves a HW access, and can fail for more reasons than just netlink message size exhaustion. Therefore do not always return -EMSGSIZE on the failure path, but respect the error code provided by the callee. Set the error explicitly where it is reasonable to assume -EMSGSIZE as the failure reason. Signed-off-by: Petr Machata Signed-off-by: Ido Schimmel --- net/core/rtnetlink.c | 22 ++++++++++++++++------ 1 file changed, 16 insertions(+), 6 deletions(-) diff --git a/net/core/rtnetlink.c b/net/core/rtnetlink.c index 594aba321f42..4db1d6c01a7d 100644 --- a/net/core/rtnetlink.c +++ b/net/core/rtnetlink.c @@ -5177,8 +5177,10 @@ static int rtnl_fill_statsinfo(struct sk_buff *skb, struct net_device *dev, attr = nla_reserve_64bit(skb, IFLA_STATS_LINK_64, sizeof(struct rtnl_link_stats64), IFLA_STATS_UNSPEC); - if (!attr) + if (!attr) { + err = -EMSGSIZE; goto nla_put_failure; + } sp = nla_data(attr); dev_get_stats(dev, sp); @@ -5191,8 +5193,10 @@ static int rtnl_fill_statsinfo(struct sk_buff *skb, struct net_device *dev, *idxattr = IFLA_STATS_LINK_XSTATS; attr = nla_nest_start_noflag(skb, IFLA_STATS_LINK_XSTATS); - if (!attr) + if (!attr) { + err = -EMSGSIZE; goto nla_put_failure; + } err = ops->fill_linkxstats(skb, dev, prividx, *idxattr); nla_nest_end(skb, attr); @@ -5214,8 +5218,10 @@ static int rtnl_fill_statsinfo(struct sk_buff *skb, struct net_device *dev, *idxattr = IFLA_STATS_LINK_XSTATS_SLAVE; attr = nla_nest_start_noflag(skb, IFLA_STATS_LINK_XSTATS_SLAVE); - if (!attr) + if (!attr) { + err = -EMSGSIZE; goto nla_put_failure; + } err = ops->fill_linkxstats(skb, dev, prividx, *idxattr); nla_nest_end(skb, attr); @@ -5233,8 +5239,10 @@ static int rtnl_fill_statsinfo(struct sk_buff *skb, struct net_device *dev, *idxattr = IFLA_STATS_LINK_OFFLOAD_XSTATS; attr = nla_nest_start_noflag(skb, IFLA_STATS_LINK_OFFLOAD_XSTATS); - if (!attr) + if (!attr) { + err = -EMSGSIZE; goto nla_put_failure; + } err = rtnl_offload_xstats_fill(skb, dev, prividx, off_filter_mask, extack); @@ -5253,8 +5261,10 @@ static int rtnl_fill_statsinfo(struct sk_buff *skb, struct net_device *dev, *idxattr = IFLA_STATS_AF_SPEC; attr = nla_nest_start_noflag(skb, IFLA_STATS_AF_SPEC); - if (!attr) + if (!attr) { + err = -EMSGSIZE; goto nla_put_failure; + } rcu_read_lock(); list_for_each_entry_rcu(af_ops, &rtnl_af_ops, list) { @@ -5298,7 +5308,7 @@ static int rtnl_fill_statsinfo(struct sk_buff *skb, struct net_device *dev, else nlmsg_end(skb, nlh); - return -EMSGSIZE; + return err; } static size_t if_nlmsg_stats_size(const struct net_device *dev, -- 2.33.1