Am 18.06.19 um 11:38 schrieb Antony Pavlov:
In this relocate_code() piece 'length' is greater than 'barebox_image_size':
#define MAX_BSS_SIZE SZ_1M
...
length = barebox_image_size + MAX_BSS_SIZE;
relocaddr = ALIGN_DOWN(ram_size - barebox_image_size, SZ_64K);
...
memcpy((void *)relocaddr, __image_start, length);
so 'ram_size' overflow occurs during memcpy().
Signed-off-by: Antony Pavlov <[email protected]>
Thenk you!
This patch is fixing relocatable barebox for malta-qemu and ihas no regressions
on ar9331 DPT-Module!
Tested-by: Oleksij Rempel <[email protected]>
---
arch/mips/lib/reloc.c | 11 +++++------
1 file changed, 5 insertions(+), 6 deletions(-)
diff --git a/arch/mips/lib/reloc.c b/arch/mips/lib/reloc.c
index 9756d61666..14ba6167dd 100644
--- a/arch/mips/lib/reloc.c
+++ b/arch/mips/lib/reloc.c
@@ -40,8 +40,6 @@
#include <linux/sizes.h>
#include <asm-generic/memory_layout.h>
-#define MAX_BSS_SIZE SZ_1M
-
void main_entry(void *fdt, u32 fdt_size);
void relocate_code(void *fdt, u32 fdt_size, u32 relocaddr);
@@ -127,8 +125,10 @@ void relocate_code(void *fdt, u32 fdt_size, u32 ram_size)
unsigned int type;
long off;
- length = barebox_image_size + MAX_BSS_SIZE;
- relocaddr = ALIGN_DOWN(ram_size - barebox_image_size, SZ_64K);
+ bss_len = (unsigned long)&__bss_stop - (unsigned long)__bss_start;
+
+ length = barebox_image_size + bss_len;
+ relocaddr = ALIGN_DOWN(ram_size - length, SZ_64K);
relocaddr = KSEG0ADDR(relocaddr);
new_stack = relocaddr - MALLOC_SIZE - 16;
@@ -143,7 +143,7 @@ void relocate_code(void *fdt, u32 fdt_size, u32 ram_size)
panic("Mis-aligned relocation\n");
/* Copy Barebox to RAM */
- memcpy((void *)relocaddr, __image_start, length);
+ memcpy((void *)relocaddr, __image_start, barebox_image_size);
/* Now apply relocations to the copy in RAM */
buf = __rel_start;
@@ -162,7 +162,6 @@ void relocate_code(void *fdt, u32 fdt_size, u32 ram_size)
/* Clear the .bss section */
bss_start = (uint8_t *)((unsigned long)__bss_start + off);
- bss_len = (unsigned long)&__bss_stop - (unsigned long)__bss_start;
memset(bss_start, 0, bss_len);
__asm__ __volatile__ (
--
Regards,
Oleksij
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