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61 lines
2.4 KiB
Diff
61 lines
2.4 KiB
Diff
From f3eceaed9edd7c0e0d9fb057613131f92973626f Mon Sep 17 00:00:00 2001
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From: Kees Cook <keescook@chromium.org>
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Date: Fri, 27 Jan 2023 14:38:54 -0800
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Subject: [PATCH] net: ethernet: mtk_eth_soc: Avoid truncating allocation
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There doesn't appear to be a reason to truncate the allocation used for
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flow_info, so do a full allocation and remove the unused empty struct.
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GCC does not like having a reference to an object that has been
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partially allocated, as bounds checking may become impossible when
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such an object is passed to other code. Seen with GCC 13:
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../drivers/net/ethernet/mediatek/mtk_ppe.c: In function 'mtk_foe_entry_commit_subflow':
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../drivers/net/ethernet/mediatek/mtk_ppe.c:623:18: warning: array subscript 'struct mtk_flow_entry[0]' is partly outside array bounds of 'unsigned char[48]' [-Warray-bounds=]
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623 | flow_info->l2_data.base_flow = entry;
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| ^~
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Cc: Felix Fietkau <nbd@nbd.name>
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Cc: John Crispin <john@phrozen.org>
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Cc: Sean Wang <sean.wang@mediatek.com>
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Cc: Mark Lee <Mark-MC.Lee@mediatek.com>
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Cc: Lorenzo Bianconi <lorenzo@kernel.org>
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Cc: "David S. Miller" <davem@davemloft.net>
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Cc: Eric Dumazet <edumazet@google.com>
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Cc: Jakub Kicinski <kuba@kernel.org>
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Cc: Paolo Abeni <pabeni@redhat.com>
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Cc: Matthias Brugger <matthias.bgg@gmail.com>
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Cc: netdev@vger.kernel.org
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Cc: linux-arm-kernel@lists.infradead.org
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Cc: linux-mediatek@lists.infradead.org
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Signed-off-by: Kees Cook <keescook@chromium.org>
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Reviewed-by: Simon Horman <simon.horman@corigine.com>
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Link: https://lore.kernel.org/r/20230127223853.never.014-kees@kernel.org
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Signed-off-by: Paolo Abeni <pabeni@redhat.com>
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---
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drivers/net/ethernet/mediatek/mtk_ppe.c | 3 +--
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drivers/net/ethernet/mediatek/mtk_ppe.h | 1 -
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2 files changed, 1 insertion(+), 3 deletions(-)
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--- a/drivers/net/ethernet/mediatek/mtk_ppe.c
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+++ b/drivers/net/ethernet/mediatek/mtk_ppe.c
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@@ -621,8 +621,7 @@ mtk_foe_entry_commit_subflow(struct mtk_
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u32 ib1_mask = mtk_get_ib1_pkt_type_mask(ppe->eth) | MTK_FOE_IB1_UDP;
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int type;
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- flow_info = kzalloc(offsetof(struct mtk_flow_entry, l2_data.end),
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- GFP_ATOMIC);
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+ flow_info = kzalloc(sizeof(*flow_info), GFP_ATOMIC);
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if (!flow_info)
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return;
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--- a/drivers/net/ethernet/mediatek/mtk_ppe.h
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+++ b/drivers/net/ethernet/mediatek/mtk_ppe.h
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@@ -279,7 +279,6 @@ struct mtk_flow_entry {
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struct {
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struct mtk_flow_entry *base_flow;
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struct hlist_node list;
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- struct {} end;
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} l2_data;
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};
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struct rhash_head node;
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