[PATCH] net: prestera: validate firmware header length
From: Pengpeng Hou <hidden>
Date: 2026-07-06 09:26:13
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Subsystem:
marvell prestera ethernet switch driver, networking drivers, the rest · Maintainers:
Elad Nachman, Andrew Lunn, "David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Linus Torvalds
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 <redacted> --- 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);
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2.43.0