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Date: Tue, 4 Apr 2023 10:21:14 +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: llvm@...ts.linux.dev, 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: hexagon-randconfig-r041-20230403 (https://download.01.org/0day-ci/archive/20230404/202304041030.rTLITKDY-lkp@intel.com/config)
compiler: clang version 17.0.0 (https://github.com/llvm/llvm-project 67409911353323ca5edf2049ef0df54132fa1ca7)
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://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
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=hexagon olddefconfig
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=hexagon 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/202304041030.rTLITKDY-lkp@intel.com/
All warnings (new ones prefixed by >>):
In file included from net/ipv4/tcp_sigpool.c:10:
In file included from include/net/tcp.h:20:
In file included from include/linux/tcp.h:17:
In file included from include/linux/skbuff.h:17:
In file included from include/linux/bvec.h:10:
In file included from include/linux/highmem.h:12:
In file included from include/linux/hardirq.h:11:
In file included from ./arch/hexagon/include/generated/asm/hardirq.h:1:
In file included from include/asm-generic/hardirq.h:17:
In file included from include/linux/irq.h:20:
In file included from include/linux/io.h:13:
In file included from arch/hexagon/include/asm/io.h:334:
include/asm-generic/io.h:547:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
val = __raw_readb(PCI_IOBASE + addr);
~~~~~~~~~~ ^
include/asm-generic/io.h:560:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
~~~~~~~~~~ ^
include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
^
In file included from net/ipv4/tcp_sigpool.c:10:
In file included from include/net/tcp.h:20:
In file included from include/linux/tcp.h:17:
In file included from include/linux/skbuff.h:17:
In file included from include/linux/bvec.h:10:
In file included from include/linux/highmem.h:12:
In file included from include/linux/hardirq.h:11:
In file included from ./arch/hexagon/include/generated/asm/hardirq.h:1:
In file included from include/asm-generic/hardirq.h:17:
In file included from include/linux/irq.h:20:
In file included from include/linux/io.h:13:
In file included from arch/hexagon/include/asm/io.h:334:
include/asm-generic/io.h:573:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
~~~~~~~~~~ ^
include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
^
In file included from net/ipv4/tcp_sigpool.c:10:
In file included from include/net/tcp.h:20:
In file included from include/linux/tcp.h:17:
In file included from include/linux/skbuff.h:17:
In file included from include/linux/bvec.h:10:
In file included from include/linux/highmem.h:12:
In file included from include/linux/hardirq.h:11:
In file included from ./arch/hexagon/include/generated/asm/hardirq.h:1:
In file included from include/asm-generic/hardirq.h:17:
In file included from include/linux/irq.h:20:
In file included from include/linux/io.h:13:
In file included from arch/hexagon/include/asm/io.h:334:
include/asm-generic/io.h:584:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
__raw_writeb(value, PCI_IOBASE + addr);
~~~~~~~~~~ ^
include/asm-generic/io.h:594:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
__raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
~~~~~~~~~~ ^
include/asm-generic/io.h:604:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
__raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
~~~~~~~~~~ ^
>> net/ipv4/tcp_sigpool.c:63:9: warning: comparison of distinct pointer types ('typeof (size) *' (aka 'unsigned int *') and 'typeof (__scratch_size) *' (aka 'unsigned long *')) [-Wcompare-distinct-pointer-types]
size = max(size, __scratch_size);
^~~~~~~~~~~~~~~~~~~~~~~~~
include/linux/minmax.h:74:19: note: expanded from macro 'max'
#define max(x, y) __careful_cmp(x, y, >)
^~~~~~~~~~~~~~~~~~~~~~
include/linux/minmax.h:36:24: note: expanded from macro '__careful_cmp'
__builtin_choose_expr(__safe_cmp(x, y), \
^~~~~~~~~~~~~~~~
include/linux/minmax.h:26:4: note: expanded from macro '__safe_cmp'
(__typecheck(x, y) && __no_side_effects(x, y))
^~~~~~~~~~~~~~~~~
include/linux/minmax.h:20:28: note: expanded from macro '__typecheck'
(!!(sizeof((typeof(x) *)1 == (typeof(y) *)1)))
~~~~~~~~~~~~~~ ^ ~~~~~~~~~~~~~~
7 warnings generated.
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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