From: Atsuo Igarashi <atsuo_igarashi@tripeaks.co.jp>
Date: Fri, 26 Sep 2008 15:36:41 +0000 (-0500)
Subject: kgdb: could not write to the last of valid memory with kgdb
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=18d6522b86d21a04c8ac1ea79747e2e434a956d9;p=GitHub%2FLineageOS%2FG12%2Fandroid_kernel_amlogic_linux-4.9.git

kgdb: could not write to the last of valid memory with kgdb

On the ARM architecture, kgdb will crash the kernel if the last byte
of valid memory is written due to a flush_icache_range flushing
beyond the memory boundary.

Signed-off-by: Atsuo Igarashi <atsuo_igarashi@tripeaks.co.jp>
Signed-off-by: Jason Wessel <jason.wessel@windriver.com>
---

diff --git a/kernel/kgdb.c b/kernel/kgdb.c
index eaa21fc9ad1d..949806ab67de 100644
--- a/kernel/kgdb.c
+++ b/kernel/kgdb.c
@@ -488,7 +488,7 @@ static int write_mem_msg(int binary)
 		if (err)
 			return err;
 		if (CACHE_FLUSH_IS_SAFE)
-			flush_icache_range(addr, addr + length + 1);
+			flush_icache_range(addr, addr + length);
 		return 0;
 	}