From: kernel test robot <lkp@intel.com>
To: Sebastian Andrzej Siewior <bigeasy@linutronix.de>,
linux-kernel@vger.kernel.org
Cc: oe-kbuild-all@lists.linux.dev,
Sebastian Andrzej Siewior <bigeasy@linutronix.de>,
Andrew Morton <akpm@linux-foundation.org>,
Linux Memory Management List <linux-mm@kvack.org>,
Andy Shevchenko <andriy.shevchenko@linux.intel.com>,
Kees Cook <kees@kernel.org>, Petr Mladek <pmladek@suse.com>,
Rasmus Villemoes <linux@rasmusvillemoes.dk>,
Sergey Senozhatsky <senozhatsky@chromium.org>,
Steven Rostedt <rostedt@goodmis.org>,
Tycho Andersen <tycho@tycho.pizza>
Subject: Re: [PATCH v3 1/2] vsprintf: Don't leak pointers for %ps without KALLSYMS enabled
Date: Fri, 16 Oct 2026 11:28:46 +0800 [thread overview]
Message-ID: <202610161107.ckH3ptvE-lkp@intel.com> (raw)
In-Reply-To: <20261015-vsprintf_kallsym-v3-1-c175c27f38b7@linutronix.de>
Hi Sebastian,
kernel test robot noticed the following build warnings:
[auto build test WARNING on ec8bf8280261294a9b9b4520414b42704c7f9f6b]
url: https://github.com/intel-lab-lkp/linux/commits/Sebastian-Andrzej-Siewior/vsprintf-Don-t-leak-pointers-for-ps-without-KALLSYMS-enabled/20261015-180648
base: ec8bf8280261294a9b9b4520414b42704c7f9f6b
patch link: https://lore.kernel.org/r/20261015-vsprintf_kallsym-v3-1-c175c27f38b7%40linutronix.de
patch subject: [PATCH v3 1/2] vsprintf: Don't leak pointers for %ps without KALLSYMS enabled
config: openrisc-defconfig (https://download.01.org/0day-ci/archive/20261016/202610161107.ckH3ptvE-lkp@intel.com/config)
compiler: or1k-linux-gcc (GCC) 16.1.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20261016/202610161107.ckH3ptvE-lkp@intel.com/reproduce)
If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202610161107.ckH3ptvE-lkp@intel.com/
All warnings (new ones prefixed by >>):
lib/vsprintf.c: In function 'symbol_string':
>> lib/vsprintf.c:988:23: warning: variable 'value' set but not used [-Wunused-but-set-variable=]
988 | unsigned long value;
| ^~~~~
vim +/value +988 lib/vsprintf.c
1031bc589228ca3 Dmitry Monakhov 2015-04-13 983
cf3b429b03e827c Joe Perches 2010-05-24 984 static noinline_for_stack
cf3b429b03e827c Joe Perches 2010-05-24 985 char *symbol_string(char *buf, char *end, void *ptr,
b0d33c2bd77bcf2 Joe Perches 2012-12-12 986 struct printf_spec spec, const char *fmt)
0fe1ef24f7bd002 Linus Torvalds 2008-07-06 987 {
b0d33c2bd77bcf2 Joe Perches 2012-12-12 @988 unsigned long value;
0fe1ef24f7bd002 Linus Torvalds 2008-07-06 989 #ifdef CONFIG_KALLSYMS
0fe1ef24f7bd002 Linus Torvalds 2008-07-06 990 char sym[KSYM_SYMBOL_LEN];
b0d33c2bd77bcf2 Joe Perches 2012-12-12 991 #endif
b0d33c2bd77bcf2 Joe Perches 2012-12-12 992
b0d33c2bd77bcf2 Joe Perches 2012-12-12 993 if (fmt[1] == 'R')
b0d33c2bd77bcf2 Joe Perches 2012-12-12 994 ptr = __builtin_extract_return_addr(ptr);
b0d33c2bd77bcf2 Joe Perches 2012-12-12 995 value = (unsigned long)ptr;
b0d33c2bd77bcf2 Joe Perches 2012-12-12 996
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki
parent reply other threads:[~2026-10-16 3:29 UTC|newest]
Thread overview: expand[flat|nested] mbox.gz Atom feed
[parent not found: <20261015-vsprintf_kallsym-v3-1-c175c27f38b7@linutronix.de>]
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