From: Pengpeng Hou <pengpeng@iscas.ac.cn>
To: Elad Nachman <enachman@marvell.com>
Cc: Pengpeng Hou <pengpeng@iscas.ac.cn>,
Andrew Lunn <andrew+netdev@lunn.ch>,
"David S. Miller" <davem@davemloft.net>,
Eric Dumazet <edumazet@google.com>,
Jakub Kicinski <kuba@kernel.org>, Paolo Abeni <pabeni@redhat.com>,
netdev@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: [PATCH] net: prestera: validate firmware header length
Date: Mon, 6 Jul 2026 17:26:02 +0800 [thread overview]
Message-ID: <20260706092602.79240-1-pengpeng@iscas.ac.cn> (raw)
prestera_fw_hdr_parse() reads the firmware header before checking
that the firmware image contains that header.
Reject images shorter than struct prestera_fw_header before decoding the
magic and version fields.
Signed-off-by: Pengpeng Hou <pengpeng@iscas.ac.cn>
---
drivers/net/ethernet/marvell/prestera/prestera_pci.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/drivers/net/ethernet/marvell/prestera/prestera_pci.c b/drivers/net/ethernet/marvell/prestera/prestera_pci.c
index 2989a77e3b42..1ad0e62a8433 100644
--- a/drivers/net/ethernet/marvell/prestera/prestera_pci.c
+++ b/drivers/net/ethernet/marvell/prestera/prestera_pci.c
@@ -684,6 +684,9 @@ static int prestera_fw_hdr_parse(struct prestera_fw *fw)
struct prestera_fw_header *hdr;
u32 magic;
+ if (fw->bin->size < sizeof(*hdr))
+ return -EINVAL;
+
hdr = (struct prestera_fw_header *)fw->bin->data;
magic = be32_to_cpu(hdr->magic_number);
--
2.43.0
next reply other threads:[~2026-07-06 9:26 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-07-06 9:26 Pengpeng Hou [this message]
2026-07-06 15:26 ` [PATCH] net: prestera: validate firmware header length Andrew Lunn
2026-07-07 1:45 ` Pengpeng Hou
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