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| author | Dan Carpenter <error27@gmail.com> | 2022-12-02 12:58:26 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2022-12-14 13:28:29 +0300 |
| commit | 5a142486a0db6b0b85031f22d69acd0cdcf8f72b (patch) | |
| tree | 1741125b013facb25abdff3fdd408f7f334c5b51 | |
| parent | 99859947517e446058ad7243ee81d2f9801fa3dd (diff) | |
| download | linux-5a142486a0db6b0b85031f22d69acd0cdcf8f72b.tar.xz | |
net: mvneta: Prevent out of bounds read in mvneta_config_rss()
[ Upstream commit e8b4fc13900b8e8be48debffd0dfd391772501f7 ]
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: cad5d847a093 ("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>
Signed-off-by: Sasha Levin <sashal@kernel.org>
| -rw-r--r-- | drivers/net/ethernet/marvell/mvneta.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/net/ethernet/marvell/mvneta.c b/drivers/net/ethernet/marvell/mvneta.c index 382d010e1294..5107382cefb5 100644 --- a/drivers/net/ethernet/marvell/mvneta.c +++ b/drivers/net/ethernet/marvell/mvneta.c @@ -4141,6 +4141,9 @@ static int mvneta_config_rss(struct mvneta_port *pp) napi_disable(&pp->napi); } + if (pp->indir[0] >= nr_cpu_ids) + return -EINVAL; + pp->rxq_def = pp->indir[0]; /* Update unicast mapping */ |