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net: dsa: felix: fix possible NULL pointer dereference 

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>
This commit is contained in:
Zheng Yongjun 2022-03-29 09:08:00 +00:00 committed by Jakub Kicinski
parent 77c9387c0c
commit 866b7a278c
1 changed files with 4 additions and 0 deletions
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4
drivers/net/dsa/ocelot/felix_vsc9959.c
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@ -1928,6 +1928,10 @@ static int vsc9959_psfp_filter_add(struct ocelot *ocelot, int port,
case FLOW_ACTION_GATE:
size = struct_size(sgi, entries, a->gate.num_entries);
sgi = kzalloc(size, GFP_KERNEL);
if (!sgi) {
ret = -ENOMEM;
goto err;
}
vsc9959_psfp_parse_gate(a, sgi);
ret = vsc9959_psfp_sgi_table_add(ocelot, sgi);
if (ret) {