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 <[email protected]>
Signed-off-by: Jason Wessel <[email protected]>

diff --git a/kernel/kgdb.c b/kernel/kgdb.c
index eaa21fc9ad1d54250142a6c806115267865d3be6..949806ab67de6461995cf8fc4543732f7ab64adf 100644 (file)
--- 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;
        }