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net: dsa: felix: fix possible NULL pointer dereference
[ Upstream commit866b7a278c
] As the possible failure of the allocation, kzalloc() may return NULL pointer. Therefore, it should be better to check the 'sgi' in order to prevent the dereference of NULL pointer. Fixes:23ae3a7877
("net: dsa: felix: add stream gate settings for psfp"). Signed-off-by: Zheng Yongjun <zhengyongjun3@huawei.com> Reviewed-by: Vladimir Oltean <vladimir.oltean@nxp.com> Link: https://lore.kernel.org/r/20220329090800.130106-1-zhengyongjun3@huawei.com Signed-off-by: Jakub Kicinski <kuba@kernel.org> Signed-off-by: Sasha Levin <sashal@kernel.org>
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@ -1940,6 +1940,10 @@ static int vsc9959_psfp_filter_add(struct ocelot *ocelot, int port,
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case FLOW_ACTION_GATE:
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case FLOW_ACTION_GATE:
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size = struct_size(sgi, entries, a->gate.num_entries);
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size = struct_size(sgi, entries, a->gate.num_entries);
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sgi = kzalloc(size, GFP_KERNEL);
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sgi = kzalloc(size, GFP_KERNEL);
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if (!sgi) {
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ret = -ENOMEM;
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goto err;
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}
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vsc9959_psfp_parse_gate(a, sgi);
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vsc9959_psfp_parse_gate(a, sgi);
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ret = vsc9959_psfp_sgi_table_add(ocelot, sgi);
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ret = vsc9959_psfp_sgi_table_add(ocelot, sgi);
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if (ret) {
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if (ret) {
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