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net: prestera: validate firmware header length

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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.

Fixes: 4c2703dfd7 ("net: marvell: prestera: Add PCI interface support")
Signed-off-by: Pengpeng Hou <pengpeng@iscas.ac.cn>
Acked-by: Elad Nachman <enachman@marvell.com>
Link: https://patch.msgid.link/20260731141500.1-prestera-v2-pengpeng@iscas.ac.cn
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Pengpeng Hou 2026-07-31 22:19:06 +08:00 committed by Jakub Kicinski
parent 3874892dd2
commit 8ae344eb54
1 changed files with 3 additions and 0 deletions
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3
drivers/net/ethernet/marvell/prestera/prestera_pci.c
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@ -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);