linux-kernel - [PATCH v2 0/4] printk: Fixes and hardening related to KERN

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Date:   Wed,  9 Nov 2016 13:41:27 +0100
From:   Petr Mladek <pmladek@...e.com>
To:     Linus Torvalds <torvalds@...ux-foundation.org>
Cc:     Joe Perches <joe@...ches.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Sergey Senozhatsky <sergey.senozhatsky.work@...il.com>,
        Steven Rostedt <rostedt@...dmis.org>,
        Jason Wessel <jason.wessel@...driver.com>,
        Jaroslav Kysela <perex@...ex.cz>,
        Takashi Iwai <tiwai@...e.com>, Chris Mason <clm@...com>,
        Josef Bacik <jbacik@...com>, David Sterba <dsterba@...e.com>,
        linux-kernel@...r.kernel.org, Petr Mladek <pmladek@...e.com>
Subject: [PATCH v2 0/4] printk: Fixes and hardening related to KERN_CONT

The first patch fixes a messed output of continuous lines
when printing backtraces for all CPUs via NMI.

The other patches fix problems that I noticed when working
on the first patch.

I have incorporated the feedback and did much more testing.
Åll patches have changed so I did not add the taken Reviews
and Acks.

Changes against v1:

  + used const char in printk_nmi_flush_buffer()

  + print the final newline with KERN_CONT in
    printk_nmi_flush_buffer()

  + used printk_skip_level() instead of the hardcoded '2'
    in all patches.

  + define PRINTK_MAX_SINGLE_HEADER_LEN to avoid hardcoding
    the buffer size; it simplified the code in btrfs_printk()

  + ignore KERN_CONT in __snd_printk(); the lines were hard
    to read because of the added stuff like <filename:line>
    for each piece.
    

Petr Mladek (4):
  printk/NMI: Handle continuous lines and missing newline
  printk/kdb: Handle more message headers
  printk/btrfs: Handle more message headers
  printk/sound: Handle more message headers

 fs/btrfs/super.c          | 26 +++++++++-------
 include/linux/printk.h    | 10 ++++++
 kernel/debug/kdb/kdb_io.c |  2 +-
 kernel/printk/nmi.c       | 78 ++++++++++++++++++++++++++++++-----------------
 sound/core/misc.c         | 20 ++++++++----
 5 files changed, 90 insertions(+), 46 deletions(-)

-- 
1.8.5.6