| Message ID | 20241202164805.1637093-1-gal@nvidia.com (mailing list archive) |
|---|---|
| State | New |
| Delegated to: | Netdev Maintainers |
| Headers | show |
| Series | [net] ethtool: Fix access to uninitialized fields in set RXNFC command | expand |
On 02/12/2024 16:48, Gal Pressman wrote: > The check for non-zero ring with RSS is only relevant for > ETHTOOL_SRXCLSRLINS command, in other cases the check tries to access > memory which was not initialized by the userspace tool. Only perform the > check in case of ETHTOOL_SRXCLSRLINS. > > Without this patch, filter deletion (for example) could statistically > result in a false error: > # ethtool --config-ntuple eth3 delete 484 > rmgr: Cannot delete RX class rule: Invalid argument > Cannot delete classification rule > > Fixes: 9e43ad7a1ede ("net: ethtool: only allow set_rxnfc with rss + ring_cookie if driver opts in") > Link: https://lore.kernel.org/netdev/871a9ecf-1e14-40dd-bbd7-e90c92f89d47@nvidia.com/ > Reviewed-by: Dragos Tatulea <dtatulea@nvidia.com> > Reviewed-by: Tariq Toukan <tariqt@nvidia.com> > Signed-off-by: Gal Pressman <gal@nvidia.com> Reviewed-by: Edward Cree <ecree.xilinx@gmail.com>
diff --git a/net/ethtool/ioctl.c b/net/ethtool/ioctl.c index 61df8ce44379..7bb94875a7ec 100644 --- a/net/ethtool/ioctl.c +++ b/net/ethtool/ioctl.c @@ -993,7 +993,8 @@ static noinline_for_stack int ethtool_set_rxnfc(struct net_device *dev, return rc; /* Nonzero ring with RSS only makes sense if NIC adds them together */ - if (info.flow_type & FLOW_RSS && !ops->cap_rss_rxnfc_adds && + if (cmd == ETHTOOL_SRXCLSRLINS && info.flow_type & FLOW_RSS && + !ops->cap_rss_rxnfc_adds && ethtool_get_flow_spec_ring(info.fs.ring_cookie)) return -EINVAL;
The check for non-zero ring with RSS is only relevant for ETHTOOL_SRXCLSRLINS command, in other cases the check tries to access memory which was not initialized by the userspace tool. Only perform the check in case of ETHTOOL_SRXCLSRLINS. Without this patch, filter deletion (for example) could statistically result in a false error: # ethtool --config-ntuple eth3 delete 484 rmgr: Cannot delete RX class rule: Invalid argument Cannot delete classification rule Fixes: 9e43ad7a1ede ("net: ethtool: only allow set_rxnfc with rss + ring_cookie if driver opts in") Link: https://lore.kernel.org/netdev/871a9ecf-1e14-40dd-bbd7-e90c92f89d47@nvidia.com/ Reviewed-by: Dragos Tatulea <dtatulea@nvidia.com> Reviewed-by: Tariq Toukan <tariqt@nvidia.com> Signed-off-by: Gal Pressman <gal@nvidia.com> --- net/ethtool/ioctl.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)