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net: ethtool: reject unsupported RSS input xfrm values

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RXFH input_xfrm currently has three supported values: 0 (clear all),
symmetric_xor and NO_CHANGE.

Reject any other value sent from user-space.

Fixes: 13e59344fb ("net: ethtool: add support for symmetric-xor RSS hash")
Suggested-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Ahmed Zaki <ahmed.zaki@intel.com>
Link: https://lore.kernel.org/r/20240104212653.394424-1-ahmed.zaki@intel.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Ahmed Zaki 2024-01-04 14:26:53 -07:00 committed by Jakub Kicinski
parent 2114e83381
commit 948f97f9d8
1 changed files with 3 additions and 0 deletions
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3
net/ethtool/ioctl.c
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@ -1302,6 +1302,9 @@ static noinline_for_stack int ethtool_set_rxfh(struct net_device *dev,
if (rxfh.rss_context && !ops->cap_rss_ctx_supported)
return -EOPNOTSUPP;
/* Check input data transformation capabilities */
if (rxfh.input_xfrm && rxfh.input_xfrm != RXH_XFRM_SYM_XOR &&
rxfh.input_xfrm != RXH_XFRM_NO_CHANGE)
return -EINVAL;
if ((rxfh.input_xfrm & RXH_XFRM_SYM_XOR) &&
!ops->cap_rss_sym_xor_supported)
return -EOPNOTSUPP;