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net: mvneta: Prevent out of bounds read in mvneta_config_rss()

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The pp->indir[0] value comes from the user.  It is passed to:

	if (cpu_online(pp->rxq_def))

inside the mvneta_percpu_elect() function.  It needs bounds checkeding
to ensure that it is not beyond the end of the cpu bitmap.

Fixes: cad5d847a0 ("net: mvneta: Fix the CPU choice in mvneta_percpu_elect")
Signed-off-by: Dan Carpenter <error27@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Dan Carpenter 2022-12-02 12:58:26 +03:00 committed by David S. Miller
parent d50b7914fa
commit e8b4fc1390
1 changed files with 3 additions and 0 deletions
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3
drivers/net/ethernet/marvell/mvneta.c
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@ -4927,6 +4927,9 @@ static int mvneta_config_rss(struct mvneta_port *pp)
napi_disable(&pp->napi); napi_disable(&pp->napi);
} }
if (pp->indir[0] >= nr_cpu_ids)
return -EINVAL;
pp->rxq_def = pp->indir[0]; pp->rxq_def = pp->indir[0];
/* Update unicast mapping */ /* Update unicast mapping */