From: Petr Mladek <pmladek@suse.com>
To: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Cc: Richard Fitzgerald <rf@opensource.cirrus.com>,
linux-kernel@vger.kernel.org,
Steven Rostedt <rostedt@goodmis.org>,
Sergey Senozhatsky <senozhatsky@chromium.org>,
Rasmus Villemoes <linux@rasmusvillemoes.dk>,
kernel test robot <oliver.sang@intel.com>
Subject: Re: [PATCH v1 1/1] lib/test_scanf: Handle n_bits == 0 in random tests
Date: Fri, 30 Jul 2021 12:45:59 +0200 [thread overview]
Message-ID: <YQPYZ0af97pJ4Gzc@alley> (raw)
In-Reply-To: <20210727150132.28920-1-andriy.shevchenko@linux.intel.com>
On Tue 2021-07-27 18:01:32, Andy Shevchenko wrote:
> UBSAN reported (via LKP)
>
> [ 11.021349][ T1] UBSAN: shift-out-of-bounds in lib/test_scanf.c:275:51
> [ 11.022782][ T1] shift exponent 32 is too large for 32-bit type 'unsigned int'
>
> When n_bits == 0, the shift is out of range. Switch code to use GENMASK
> to handle this case.
>
> Fixes: 50f530e176ea ("lib: test_scanf: Add tests for sscanf number conversion")
> Reported-by: kernel test robot <oliver.sang@intel.com>
> Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
The patch is committed in linux/printk.git, branch for-5.15.
I would send it for 4.14 if there was another urgent fix needed.
But this one does not look important enough to hurry it up alone.
Best Regards,
Petr
prev parent reply other threads:[~2021-07-30 10:46 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-07-27 15:01 [PATCH v1 1/1] lib/test_scanf: Handle n_bits == 0 in random tests Andy Shevchenko
2021-07-27 15:27 ` Richard Fitzgerald
2021-07-30 10:45 ` Petr Mladek [this message]
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