kallsyms_lookup which in turn calls for kallsyms_lookup_buildid()
writes on index "KSYM_NAME_LEN - 1".

Thus array size should be KSYM_NAME_LEN.

for powerpc and hexagon it was defined as "128" directly.
and commit '61968dbc2d5d' changed define value to 512,
So both were missed to update with new size.

Fixes: 61968dbc2d5d("kallsyms: increase maximum kernel symbol length to 512")
Signed-off-by: Maninder Singh <redacted>
---
 arch/hexagon/kernel/traps.c | 2 +-
 arch/powerpc/xmon/xmon.c    | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/hexagon/kernel/traps.c b/arch/hexagon/kernel/traps.c
index 6447763ce5a9..65b30b6ea226 100644
--- a/arch/hexagon/kernel/traps.c
+++ b/arch/hexagon/kernel/traps.c

@@ -82,7 +82,7 @@ static void do_show_stack(struct task_struct *task, unsigned long *fp,
 	const char *name = NULL;
 	unsigned long *newfp;
 	unsigned long low, high;
-	char tmpstr[128];
+	char tmpstr[KSYM_NAME_LEN];
 	char *modname;
 	int i;
 

diff --git a/arch/powerpc/xmon/xmon.c b/arch/powerpc/xmon/xmon.c
index afc827c65ff2..3441fc70ac92 100644
--- a/arch/powerpc/xmon/xmon.c
+++ b/arch/powerpc/xmon/xmon.c

@@ -91,7 +91,7 @@ static unsigned long ndump = 64;
 static unsigned long nidump = 16;
 static unsigned long ncsum = 4096;
 static int termch;
-static char tmpstr[128];
+static char tmpstr[KSYM_NAME_LEN];
 static int tracing_enabled;
 
 static long bus_error_jmp[JMP_BUF_LEN];

-- 
2.17.1