[PATCH] tools: kwbimage: Verify maximal kwbimage header size

Pali Rohár
2022-09-18T16:40:00Z

BootROM loads kwbimage header to L2-SRAM and BootROM reserve only 192 kB for it.

Signed-off-by: Pali Rohár <pali@kernel.org>
---
tools/kwbimage.c | 3 +++
1 file changed, 3 insertions(+)

diff --git a/tools/kwbimage.c b/tools/kwbimage.c
index 94b768539222..6abb9f2d5c01 100644
--- a/tools/kwbimage.c
+++ b/tools/kwbimage.c
@@ -1969,6 +1969,9 @@ static int kwbimage_verify_header(unsigned char *ptr, int image_size,
uint32_t size;
uint8_t csum;

+ if (header_size > 192*1024)
+ return -FDT_ERR_BADSTRUCTURE;
+
if (header_size > image_size)
return -FDT_ERR_BADSTRUCTURE;

--
2.20.1