linux-kernel - [PATCH 00/14] printf stuff for 4.5

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Date:	Mon, 23 Nov 2015 22:29:17 +0100
From:	Rasmus Villemoes <linux@...musvillemoes.dk>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	Rasmus Villemoes <linux@...musvillemoes.dk>,
	Al Viro <viro@...iv.linux.org.uk>,
	Ingo Molnar <mingo@...nel.org>, Tejun Heo <tj@...nel.org>,
	Joe Perches <joe@...ches.com>,
	Kees Cook <keescook@...omium.org>, linux-kernel@...r.kernel.org
Subject: [PATCH 00/14] printf stuff for 4.5

I was too late for 4.4, so here's hoping to get this into 4.5.

1-3 fix a theoretical race in printing strings via %s - since we're
reusing existing code from the dentry printer, we actually also win on
code size. Ingo, can I perhaps get you to turn your "looks good to"
into an ack?

4 fixes a problem introduced by converting all bitmap formatting to go
via %pb[l] - it turns out that bitmaps with >= 1<<15 bits are actually
printed sometimes. This isn't necessarily the best fix, but the
discussion died out, so I'm proposing this for now.

5 is just a minor optimization (maybe not so much on
register-challenged arches).

6 I'm not too sure about, but maybe the bitmap problem had been
discovered sooner (it took a little over half a year to be reported)
if these had been in place.

7 is another microoptimization.

Paranoid-me wanted me to include patch 8, but I don't have strong
feelings for it.

9-14 are minor additions to the test module (some with acks from
Kees).

Rasmus Villemoes (14):
  lib/vsprintf.c: pull out padding code from dentry_name()
  lib/vsprintf.c: move string() below widen_string()
  lib/vsprintf.c: eliminate potential race in string()
  lib/vsprintf.c: expand field_width to 24 bits
  lib/vsprintf.c: help gcc make number() smaller
  lib/vsprintf.c: warn about too large precisions and field widths
  lib/vsprintf.c: slightly refactor vscnprintf()
  lib/kasprintf.c: add sanity check to kvasprintf
  lib/test_printf.c: don't BUG
  lib/test_printf.c: check for out-of-bound writes
  lib/test_printf.c: test precision quirks
  lib/test_printf.c: account for kvasprintf tests
  lib/test_printf.c: add test for large bitmaps
  lib/test_printf.c: test dentry printing

 lib/kasprintf.c   |  10 +--
 lib/test_printf.c |  96 ++++++++++++++++++++++----
 lib/vsprintf.c    | 196 +++++++++++++++++++++++++++++++-----------------------
 3 files changed, 203 insertions(+), 99 deletions(-)

-- 
2.6.1

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