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mlxsw: spectrum: Fix memory leak in mlxsw_sp_flower_stats()

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[ 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: 7c1b8eb175 ("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>
This commit is contained in:
Zilin Guan 2025-11-12 05:21:14 +00:00 • committed by Greg Kroah-Hartman
commit 607333b38f
1 changed files with 4 additions and 2 deletions
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6
drivers/net/ethernet/mellanox/mlxsw/spectrum_flower.c
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@ -542,8 +542,10 @@ 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,
&lastuse);