From: kernel test robot <lkp@intel.com>
To: Jiri Olsa <jolsa@kernel.org>
Cc: llvm@lists.linux.dev, kbuild-all@lists.01.org,
linux-kernel@vger.kernel.org
Subject: [jolsa-perf:bpf/tramp_11 19/21] kernel/bpf/trampoline.c:81:17: warning: address of stack memory associated with parameter 'id' returned
Date: Thu, 23 Jun 2022 22:48:19 +0800 [thread overview]
Message-ID: <202206232231.u4YhpRYy-lkp@intel.com> (raw)
tree: https://git.kernel.org/pub/scm/linux/kernel/git/jolsa/perf.git bpf/tramp_11
head: c807110aa605281263da02a78af57847f5c4275e
commit: a2660a85cc98b2db2577fd844985884cff0e5cae [19/21] bpf: Add support to store multiple ids in bpf_tramp_id object
config: i386-randconfig-a015 (https://download.01.org/0day-ci/archive/20220623/202206232231.u4YhpRYy-lkp@intel.com/config)
compiler: clang version 15.0.0 (https://github.com/llvm/llvm-project 46be5faaf03466c3751f8a2882bef5a217e15926)
reproduce (this is a W=1 build):
wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
chmod +x ~/bin/make.cross
# https://git.kernel.org/pub/scm/linux/kernel/git/jolsa/perf.git/commit/?id=a2660a85cc98b2db2577fd844985884cff0e5cae
git remote add jolsa-perf https://git.kernel.org/pub/scm/linux/kernel/git/jolsa/perf.git
git fetch --no-tags jolsa-perf bpf/tramp_11
git checkout a2660a85cc98b2db2577fd844985884cff0e5cae
# save the config file
mkdir build_dir && cp config build_dir/.config
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=i386 SHELL=/bin/bash kernel/bpf/
If you fix the issue, kindly add following tag where applicable
Reported-by: kernel test robot <lkp@intel.com>
All warnings (new ones prefixed by >>):
>> kernel/bpf/trampoline.c:81:17: warning: address of stack memory associated with parameter 'id' returned [-Wreturn-stack-address]
return (u64) &id;
^~
1 warning generated.
vim +/id +81 kernel/bpf/trampoline.c
77
78 static u64 bpf_tramp_id_key(struct bpf_tramp_id *id)
79 {
80 if (bpf_tramp_id_is_multi(id))
> 81 return (u64) &id;
82 else
83 return ((u64) id->obj_id << 32) | id->id[0];
84 }
85
--
0-DAY CI Kernel Test Service
https://01.org/lkp
reply other threads:[~2022-06-23 14:48 UTC|newest]
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