From a902804ddf1418dd9e1681466767675ed8fcee6b Mon Sep 17 00:00:00 2001 From: Christophe JAILLET Date: Mon, 8 Nov 2021 22:28:55 +0100 Subject: [PATCH] net: ethernet: ti: cpsw_ale: Fix access to un-initialized memory BugLink: https://bugs.launchpad.net/bugs/1951822 [ Upstream commit 7a166854b4e24c57d56b3eba9fe1594985ee0a2c ] It is spurious to allocate a bitmap without initializing it. So, better safe than sorry, initialize it to 0 at least to have some known values. While at it, switch to the devm_bitmap_ API which is less verbose. Fixes: 4b41d3436796 ("net: ethernet: ti: cpsw: allow untagged traffic on host port") Signed-off-by: Christophe JAILLET Signed-off-by: David S. Miller Signed-off-by: Sasha Levin Signed-off-by: Paolo Pisati --- drivers/net/ethernet/ti/cpsw_ale.c | 6 ++---- 1 file changed, 2 insertions(+), 4 deletions(-) diff --git a/drivers/net/ethernet/ti/cpsw_ale.c b/drivers/net/ethernet/ti/cpsw_ale.c index 0c75e0576ee1..1ef0aaef5c61 100644 --- a/drivers/net/ethernet/ti/cpsw_ale.c +++ b/drivers/net/ethernet/ti/cpsw_ale.c @@ -1299,10 +1299,8 @@ struct cpsw_ale *cpsw_ale_create(struct cpsw_ale_params *params) if (!ale) return ERR_PTR(-ENOMEM); - ale->p0_untag_vid_mask = - devm_kmalloc_array(params->dev, BITS_TO_LONGS(VLAN_N_VID), - sizeof(unsigned long), - GFP_KERNEL); + ale->p0_untag_vid_mask = devm_bitmap_zalloc(params->dev, VLAN_N_VID, + GFP_KERNEL); if (!ale->p0_untag_vid_mask) return ERR_PTR(-ENOMEM); -- 2.39.5