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Date: Tue, 4 Apr 2023 11:44:17 +0800
From: kernel test robot <lkp@...el.com>
To: Dmitry Safonov <dima@...sta.com>, linux-kernel@...r.kernel.org,
David Ahern <dsahern@...nel.org>,
Eric Dumazet <edumazet@...gle.com>,
Paolo Abeni <pabeni@...hat.com>,
Jakub Kicinski <kuba@...nel.org>,
"David S. Miller" <davem@...emloft.net>
Cc: oe-kbuild-all@...ts.linux.dev, netdev@...r.kernel.org,
Dmitry Safonov <dima@...sta.com>,
Andy Lutomirski <luto@...capital.net>,
Ard Biesheuvel <ardb@...nel.org>,
Bob Gilligan <gilligan@...sta.com>,
Dan Carpenter <error27@...il.com>,
David Laight <David.Laight@...lab.com>,
Eric Biggers <ebiggers@...nel.org>,
"Eric W. Biederman" <ebiederm@...ssion.com>,
Francesco Ruggeri <fruggeri05@...il.com>,
Herbert Xu <herbert@...dor.apana.org.au>,
Hideaki YOSHIFUJI <yoshfuji@...ux-ipv6.org>,
Ivan Delalande <colona@...sta.com>,
Leonard Crestez <cdleonard@...il.com>,
Salam Noureddine <noureddine@...sta.com>
Subject: Re: [PATCH v5 01/21] [draft] net/tcp: Prepare tcp_md5sig_pool for
TCP-AO
Hi Dmitry,
kernel test robot noticed the following build warnings:
[auto build test WARNING on 7e364e56293bb98cae1b55fd835f5991c4e96e7d]
url: https://github.com/intel-lab-lkp/linux/commits/Dmitry-Safonov/net-tcp-Prepare-tcp_md5sig_pool-for-TCP-AO/20230404-054020
base: 7e364e56293bb98cae1b55fd835f5991c4e96e7d
patch link: https://lore.kernel.org/r/20230403213420.1576559-2-dima%40arista.com
patch subject: [PATCH v5 01/21] [draft] net/tcp: Prepare tcp_md5sig_pool for TCP-AO
config: i386-randconfig-s001-20230403 (https://download.01.org/0day-ci/archive/20230404/202304041119.egH8ZcDT-lkp@intel.com/config)
compiler: gcc-11 (Debian 11.3.0-8) 11.3.0
reproduce:
# apt-get install sparse
# sparse version: v0.6.4-39-gce1a6720-dirty
# https://github.com/intel-lab-lkp/linux/commit/94408bb4cf5cbcc772ab4d70eeb73bda183c6124
git remote add linux-review https://github.com/intel-lab-lkp/linux
git fetch --no-tags linux-review Dmitry-Safonov/net-tcp-Prepare-tcp_md5sig_pool-for-TCP-AO/20230404-054020
git checkout 94408bb4cf5cbcc772ab4d70eeb73bda183c6124
# save the config file
mkdir build_dir && cp config build_dir/.config
make W=1 C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' O=build_dir ARCH=i386 olddefconfig
make W=1 C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' O=build_dir ARCH=i386 SHELL=/bin/bash net/ipv4/
If you fix the issue, kindly add following tag where applicable
| Reported-by: kernel test robot <lkp@...el.com>
| Link: https://lore.kernel.org/oe-kbuild-all/202304041119.egH8ZcDT-lkp@intel.com/
sparse warnings: (new ones prefixed by >>)
>> net/ipv4/tcp_sigpool.c:63:16: sparse: sparse: incompatible types in comparison expression (different type sizes):
>> net/ipv4/tcp_sigpool.c:63:16: sparse: unsigned int *
>> net/ipv4/tcp_sigpool.c:63:16: sparse: unsigned long *
net/ipv4/tcp_sigpool.c:297:5: sparse: sparse: context imbalance in 'tcp_sigpool_start' - different lock contexts for basic block
vim +63 net/ipv4/tcp_sigpool.c
43
44 /*
45 * sigpool_reserve_scratch - re-allocates scratch buffer, slow-path
46 * @size: request size for the scratch/temp buffer
47 */
48 static int sigpool_reserve_scratch(size_t size)
49 {
50 struct scratches_to_free *stf;
51 size_t stf_sz = struct_size(stf, scratches, num_possible_cpus());
52 int cpu, err = 0;
53
54 lockdep_assert_held(&cpool_mutex);
55 if (__scratch_size >= size)
56 return 0;
57
58 stf = kmalloc(stf_sz, GFP_KERNEL);
59 if (!stf)
60 return -ENOMEM;
61 stf->cnt = 0;
62
> 63 size = max(size, __scratch_size);
64 cpus_read_lock();
65 for_each_possible_cpu(cpu) {
66 void *scratch, *old_scratch;
67
68 scratch = kmalloc_node(size, GFP_KERNEL, cpu_to_node(cpu));
69 if (!scratch) {
70 err = -ENOMEM;
71 break;
72 }
73
74 old_scratch = rcu_replace_pointer(per_cpu(sigpool_scratch, cpu), scratch, lockdep_is_held(&cpool_mutex));
75 if (!cpu_online(cpu) || !old_scratch) {
76 kfree(old_scratch);
77 continue;
78 }
79 stf->scratches[stf->cnt++] = old_scratch;
80 }
81 cpus_read_unlock();
82 if (!err)
83 __scratch_size = size;
84
85 call_rcu(&stf->rcu, free_old_scratches);
86 return err;
87 }
88
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests
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