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net/mlx5: DR, Fix check for unsupported fields in match param

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The existing loop doesn't cast the buffer while scanning it, which
results in out-of-bounds read and failure to create the matcher.

Fixes: 941f19798a ("net/mlx5: DR, Add check for unsupported fields in match param")
Signed-off-by: Yevgeny Kliteynik <kliteyn@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>
This commit is contained in:
Yevgeny Kliteynik 2021-11-03 17:51:03 +02:00 committed by Saeed Mahameed
parent 9091b821aa
commit 455832d496
1 changed files with 6 additions and 5 deletions
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11
drivers/net/ethernet/mellanox/mlx5/core/steering/dr_matcher.c
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@ -924,11 +924,12 @@ static int dr_matcher_init(struct mlx5dr_matcher *matcher,
/* Check that all mask data was consumed */
for (i = 0; i < consumed_mask.match_sz; i++) {
if (consumed_mask.match_buf[i]) {
mlx5dr_dbg(dmn, "Match param mask contains unsupported parameters\n");
ret = -EOPNOTSUPP;
goto free_consumed_mask;
}
if (!((u8 *)consumed_mask.match_buf)[i])
continue;
mlx5dr_dbg(dmn, "Match param mask contains unsupported parameters\n");
ret = -EOPNOTSUPP;
goto free_consumed_mask;
}
ret = 0;