CC greg
On Tue, Dec 28, 2021 at 3:06 AM Hangyu Hua <hbh25y@xxxxxxxxx> wrote:
When the size of commandp >= size, array out of bound write occurs because
len == 0.
Signed-off-by: Hangyu Hua <hbh25y@xxxxxxxxx>
---
arch/m68k/kernel/uboot.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/arch/m68k/kernel/uboot.c b/arch/m68k/kernel/uboot.c
index 928dbd33fc4a..63eaf3c3ddcd 100644
--- a/arch/m68k/kernel/uboot.c
+++ b/arch/m68k/kernel/uboot.c
@@ -101,5 +101,6 @@ __init void process_uboot_commandline(char *commandp, int size)
}
parse_uboot_commandline(commandp, len);
- commandp[len - 1] = 0;
+ if (len > 0)
+ commandp[len - 1] = 0;
}
--
2.25.1
