This is a note to let you know that I've just added the patch titled
powerpc/xmon: Use KSYM_NAME_LEN in array size
to the 6.3-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
powerpc-xmon-use-ksym_name_len-in-array-size.patch
and it can be found in the queue-6.3 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 719dfd5925e186e09a2a6f23016936ac436f3d78 Mon Sep 17 00:00:00 2001
From: Maninder Singh <maninder1.s@xxxxxxxxxxx>
Date: Mon, 29 May 2023 16:43:37 +0530
Subject: powerpc/xmon: Use KSYM_NAME_LEN in array size
From: Maninder Singh <maninder1.s@xxxxxxxxxxx>
commit 719dfd5925e186e09a2a6f23016936ac436f3d78 upstream.
kallsyms_lookup() which in turn calls kallsyms_lookup_buildid() writes
to index "KSYM_NAME_LEN - 1".
Thus the array passed as namebuf to kallsyms_lookup() should be
KSYM_NAME_LEN in size.
In xmon.c the array was defined to be "128" bytes directly, without
using KSYM_NAME_LEN. Commit b8a94bfb3395 ("kallsyms: increase maximum
kernel symbol length to 512") changed the value to 512, but missed
updating the xmon code.
Fixes: b8a94bfb3395 ("kallsyms: increase maximum kernel symbol length to 512")
Cc: stable@xxxxxxxxxxxxxxx # v6.1+
Co-developed-by: Onkarnath <onkarnath.1@xxxxxxxxxxx>
Signed-off-by: Onkarnath <onkarnath.1@xxxxxxxxxxx>
Signed-off-by: Maninder Singh <maninder1.s@xxxxxxxxxxx>
[mpe: Tweak change log wording and fix commit reference]
Signed-off-by: Michael Ellerman <mpe@xxxxxxxxxxxxxx>
Link: https://msgid.link/20230529111337.352990-2-maninder1.s@xxxxxxxxxxx
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
arch/powerpc/xmon/xmon.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/arch/powerpc/xmon/xmon.c
+++ b/arch/powerpc/xmon/xmon.c
@@ -88,7 +88,7 @@ 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];
Patches currently in stable-queue which might be from maninder1.s@xxxxxxxxxxx are
queue-6.3/powerpc-xmon-use-ksym_name_len-in-array-size.patch
