From 09066a51a1b15060f90f07094e81fa9fd2afb7ad Mon Sep 17 00:00:00 2001 From: Dan Carpenter Date: Mon, 4 Nov 2024 13:34:57 +0800 Subject: [PATCH] net: mvneta: Prevent out of bounds read in mvneta_config_rss() stable inclusion from stable-v5.10.159 commit 146ebee8fcdb349d7ec0e49915e6cdafb92544ae category: bugfix bugzilla: https://gitee.com/openeuler/kernel/issues/I7NTXH Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=146ebee8fcdb349d7ec0e49915e6cdafb92544ae -------------------------------- [ 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 Signed-off-by: David S. Miller Signed-off-by: Sasha Levin Signed-off-by: Zeng Heng --- drivers/net/ethernet/marvell/mvneta.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/net/ethernet/marvell/mvneta.c b/drivers/net/ethernet/marvell/mvneta.c index 403eeff39c2f..7e60f4bd9700 100644 --- a/drivers/net/ethernet/marvell/mvneta.c +++ b/drivers/net/ethernet/marvell/mvneta.c @@ -4778,6 +4778,9 @@ 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 */ -- Gitee