This is a note to let you know that I've just added the patch titled
vsprintf: avoid misleading "(null)" for %px
to the 4.15-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:
vsprintf-avoid-misleading-null-for-px.patch
and it can be found in the queue-4.15 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 3a129cc2151425e5aeb69aeb25fbc994ec738137 Mon Sep 17 00:00:00 2001
From: Adam Borowski <kilobyte@xxxxxxxxxx>
Date: Sun, 4 Feb 2018 18:45:21 +0100
Subject: vsprintf: avoid misleading "(null)" for %px
From: Adam Borowski <kilobyte@xxxxxxxxxx>
commit 3a129cc2151425e5aeb69aeb25fbc994ec738137 upstream.
Like %pK already does, print "00000000" instead.
This confused people -- the convention is that "(null)" means you tried to
dereference a null pointer as opposed to printing the address.
Link: http://lkml.kernel.org/r/20180204174521.21383-1-kilobyte@xxxxxxxxxx
To: Sergey Senozhatsky <sergey.senozhatsky@xxxxxxxxx>
To: Steven Rostedt <rostedt@xxxxxxxxxxx>
To: linux-kernel@xxxxxxxxxxxxxxx
Cc: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
Cc: Joe Perches <joe@xxxxxxxxxxx>
Cc: Kees Cook <keescook@xxxxxxxxxxxx>
Cc: "Roberts, William C" <william.c.roberts@xxxxxxxxx>
Cc: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>
Cc: David Laight <David.Laight@xxxxxxxxxx>
Cc: Randy Dunlap <rdunlap@xxxxxxxxxxxxx>
Cc: Geert Uytterhoeven <geert@xxxxxxxxxxxxxx>
Signed-off-by: Adam Borowski <kilobyte@xxxxxxxxxx>
Signed-off-by: Petr Mladek <pmladek@xxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
lib/vsprintf.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/lib/vsprintf.c
+++ b/lib/vsprintf.c
@@ -1849,7 +1849,7 @@ char *pointer(const char *fmt, char *buf
{
const int default_width = 2 * sizeof(void *);
- if (!ptr && *fmt != 'K') {
+ if (!ptr && *fmt != 'K' && *fmt != 'x') {
/*
* Print (null) with the same width as a pointer so it makes
* tabular output look nice.
Patches currently in stable-queue which might be from kilobyte@xxxxxxxxxx are
queue-4.15/vsprintf-avoid-misleading-null-for-px.patch