5.15-stable review patch. If anyone has any objections, please let me know.

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From: Zilin Guan zilin@seu.edu.cn

[ Upstream commit 407a06507c2358554958e8164dc97176feddcafc ]

The function mlxsw_sp_flower_stats() calls mlxsw_sp_acl_ruleset_get() to obtain a ruleset reference. If the subsequent call to mlxsw_sp_acl_rule_lookup() fails to find a rule, the function returns an error without releasing the ruleset reference, causing a memory leak.

Fix this by using a goto to the existing error handling label, which calls mlxsw_sp_acl_ruleset_put() to properly release the reference.

Fixes: 7c1b8eb175b69 ("mlxsw: spectrum: Add support for TC flower offload statistics") Signed-off-by: Zilin Guan zilin@seu.edu.cn Reviewed-by: Ido Schimmel idosch@nvidia.com Link: https://patch.msgid.link/20251112052114.1591695-1-zilin@seu.edu.cn Signed-off-by: Jakub Kicinski kuba@kernel.org Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/net/ethernet/mellanox/mlxsw/spectrum_flower.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/drivers/net/ethernet/mellanox/mlxsw/spectrum_flower.c b/drivers/net/ethernet/mellanox/mlxsw/spectrum_flower.c index be3791ca6069d..c327b11265773 100644 --- a/drivers/net/ethernet/mellanox/mlxsw/spectrum_flower.c +++ b/drivers/net/ethernet/mellanox/mlxsw/spectrum_flower.c @@ -673,8 +673,10 @@ int mlxsw_sp_flower_stats(struct mlxsw_sp *mlxsw_sp, return -EINVAL;

rule = mlxsw_sp_acl_rule_lookup(mlxsw_sp, ruleset, f->cookie); - if (!rule) - return -EINVAL; + if (!rule) { + err = -EINVAL; + goto err_rule_get_stats; + }

err = mlxsw_sp_acl_rule_get_stats(mlxsw_sp, rule, &packets, &bytes, &drops, &lastuse, &used_hw_stats);