From: kernel test robot <lkp@intel.com>
To: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: kbuild-all@lists.01.org, clang-built-linux@googlegroups.com,
linux-kernel@vger.kernel.org, Jakub Kicinski <kuba@kernel.org>,
Matthieu Baerts <matthieu.baerts@tessares.net>
Subject: net/bridge/br_multicast.c:1430:13: warning: stack frame size of 1072 bytes in function '__br_multicast_send_query'
Date: Sat, 24 Apr 2021 19:29:38 +0800 [thread overview]
Message-ID: <202104241919.dtjYvDQq-lkp@intel.com> (raw)
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tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head: 8db5efb83fa99e81c3f8dee92a6589b251f117f3
commit: b142083b585c2c03af24cca4d274f797796a4064 mptcp: MPTCP_KUNIT_TESTS should depend on MPTCP instead of selecting it
date: 6 months ago
config: powerpc64-randconfig-r036-20210424 (attached as .config)
compiler: clang version 13.0.0 (https://github.com/llvm/llvm-project 3d1aecbd285709f58168b3ad65c06da4b42132a9)
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
# install powerpc64 cross compiling tool for clang build
# apt-get install binutils-powerpc64-linux-gnu
# https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=b142083b585c2c03af24cca4d274f797796a4064
git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
git fetch --no-tags linus master
git checkout b142083b585c2c03af24cca4d274f797796a4064
# save the attached .config to linux build tree
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 ARCH=powerpc64
If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>
All warnings (new ones prefixed by >>):
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
arch/powerpc/include/asm/io.h:601:3: note: expanded from macro 'DEF_PCI_AC_NORET'
__do_##name al; \
^~~~~~~~~~~~~~
<scratch space>:39:1: note: expanded from here
__do_insb
^
arch/powerpc/include/asm/io.h:541:56: note: expanded from macro '__do_insb'
#define __do_insb(p, b, n) readsb((PCI_IO_ADDR)_IO_BASE+(p), (b), (n))
~~~~~~~~~~~~~~~~~~~~~^
In file included from net/bridge/br_multicast.c:10:
In file included from include/linux/if_ether.h:19:
In file included from include/linux/skbuff.h:31:
In file included from include/linux/dma-mapping.h:10:
In file included from include/linux/scatterlist.h:9:
In file included from arch/powerpc/include/asm/io.h:604:
arch/powerpc/include/asm/io-defs.h:45:1: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
DEF_PCI_AC_NORET(insw, (unsigned long p, void *b, unsigned long c),
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
arch/powerpc/include/asm/io.h:601:3: note: expanded from macro 'DEF_PCI_AC_NORET'
__do_##name al; \
^~~~~~~~~~~~~~
<scratch space>:41:1: note: expanded from here
__do_insw
^
arch/powerpc/include/asm/io.h:542:56: note: expanded from macro '__do_insw'
#define __do_insw(p, b, n) readsw((PCI_IO_ADDR)_IO_BASE+(p), (b), (n))
~~~~~~~~~~~~~~~~~~~~~^
In file included from net/bridge/br_multicast.c:10:
In file included from include/linux/if_ether.h:19:
In file included from include/linux/skbuff.h:31:
In file included from include/linux/dma-mapping.h:10:
In file included from include/linux/scatterlist.h:9:
In file included from arch/powerpc/include/asm/io.h:604:
arch/powerpc/include/asm/io-defs.h:47:1: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
DEF_PCI_AC_NORET(insl, (unsigned long p, void *b, unsigned long c),
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
arch/powerpc/include/asm/io.h:601:3: note: expanded from macro 'DEF_PCI_AC_NORET'
__do_##name al; \
^~~~~~~~~~~~~~
<scratch space>:43:1: note: expanded from here
__do_insl
^
arch/powerpc/include/asm/io.h:543:56: note: expanded from macro '__do_insl'
#define __do_insl(p, b, n) readsl((PCI_IO_ADDR)_IO_BASE+(p), (b), (n))
~~~~~~~~~~~~~~~~~~~~~^
In file included from net/bridge/br_multicast.c:10:
In file included from include/linux/if_ether.h:19:
In file included from include/linux/skbuff.h:31:
In file included from include/linux/dma-mapping.h:10:
In file included from include/linux/scatterlist.h:9:
In file included from arch/powerpc/include/asm/io.h:604:
arch/powerpc/include/asm/io-defs.h:49:1: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
DEF_PCI_AC_NORET(outsb, (unsigned long p, const void *b, unsigned long c),
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
arch/powerpc/include/asm/io.h:601:3: note: expanded from macro 'DEF_PCI_AC_NORET'
__do_##name al; \
^~~~~~~~~~~~~~
<scratch space>:45:1: note: expanded from here
__do_outsb
^
arch/powerpc/include/asm/io.h:544:58: note: expanded from macro '__do_outsb'
#define __do_outsb(p, b, n) writesb((PCI_IO_ADDR)_IO_BASE+(p),(b),(n))
~~~~~~~~~~~~~~~~~~~~~^
In file included from net/bridge/br_multicast.c:10:
In file included from include/linux/if_ether.h:19:
In file included from include/linux/skbuff.h:31:
In file included from include/linux/dma-mapping.h:10:
In file included from include/linux/scatterlist.h:9:
In file included from arch/powerpc/include/asm/io.h:604:
arch/powerpc/include/asm/io-defs.h:51:1: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
DEF_PCI_AC_NORET(outsw, (unsigned long p, const void *b, unsigned long c),
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
arch/powerpc/include/asm/io.h:601:3: note: expanded from macro 'DEF_PCI_AC_NORET'
__do_##name al; \
^~~~~~~~~~~~~~
<scratch space>:47:1: note: expanded from here
__do_outsw
^
arch/powerpc/include/asm/io.h:545:58: note: expanded from macro '__do_outsw'
#define __do_outsw(p, b, n) writesw((PCI_IO_ADDR)_IO_BASE+(p),(b),(n))
~~~~~~~~~~~~~~~~~~~~~^
In file included from net/bridge/br_multicast.c:10:
In file included from include/linux/if_ether.h:19:
In file included from include/linux/skbuff.h:31:
In file included from include/linux/dma-mapping.h:10:
In file included from include/linux/scatterlist.h:9:
In file included from arch/powerpc/include/asm/io.h:604:
arch/powerpc/include/asm/io-defs.h:53:1: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
DEF_PCI_AC_NORET(outsl, (unsigned long p, const void *b, unsigned long c),
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
arch/powerpc/include/asm/io.h:601:3: note: expanded from macro 'DEF_PCI_AC_NORET'
__do_##name al; \
^~~~~~~~~~~~~~
<scratch space>:49:1: note: expanded from here
__do_outsl
^
arch/powerpc/include/asm/io.h:546:58: note: expanded from macro '__do_outsl'
#define __do_outsl(p, b, n) writesl((PCI_IO_ADDR)_IO_BASE+(p),(b),(n))
~~~~~~~~~~~~~~~~~~~~~^
>> net/bridge/br_multicast.c:1430:13: warning: stack frame size of 1072 bytes in function '__br_multicast_send_query' [-Wframe-larger-than=]
static void __br_multicast_send_query(struct net_bridge *br,
^
>> net/bridge/br_multicast.c:2243:12: warning: stack frame size of 1296 bytes in function 'br_ip4_multicast_igmp3_report' [-Wframe-larger-than=]
static int br_ip4_multicast_igmp3_report(struct net_bridge *br,
^
8 warnings generated.
vim +/__br_multicast_send_query +1430 net/bridge/br_multicast.c
dc4eb53a996a78 Linus Lüssing 2014-06-07 1429
8ef2a9a5985499 YOSHIFUJI Hideaki 2010-04-18 @1430 static void __br_multicast_send_query(struct net_bridge *br,
8ef2a9a5985499 YOSHIFUJI Hideaki 2010-04-18 1431 struct net_bridge_port *port,
438ef2d027eb32 Nikolay Aleksandrov 2020-09-07 1432 struct net_bridge_port_group *pg,
438ef2d027eb32 Nikolay Aleksandrov 2020-09-07 1433 struct br_ip *ip_dst,
438ef2d027eb32 Nikolay Aleksandrov 2020-09-07 1434 struct br_ip *group,
438ef2d027eb32 Nikolay Aleksandrov 2020-09-07 1435 bool with_srcs,
42c11ccfe844c1 Nikolay Aleksandrov 2020-09-07 1436 u8 sflag,
42c11ccfe844c1 Nikolay Aleksandrov 2020-09-07 1437 bool *need_rexmit)
eb1d16414339a6 Herbert Xu 2010-02-27 1438 {
438ef2d027eb32 Nikolay Aleksandrov 2020-09-07 1439 bool over_lmqt = !!sflag;
eb1d16414339a6 Herbert Xu 2010-02-27 1440 struct sk_buff *skb;
1080ab95e3c7bd Nikolay Aleksandrov 2016-06-28 1441 u8 igmp_type;
eb1d16414339a6 Herbert Xu 2010-02-27 1442
438ef2d027eb32 Nikolay Aleksandrov 2020-09-07 1443 again_under_lmqt:
438ef2d027eb32 Nikolay Aleksandrov 2020-09-07 1444 skb = br_multicast_alloc_query(br, pg, ip_dst, group, with_srcs,
42c11ccfe844c1 Nikolay Aleksandrov 2020-09-07 1445 over_lmqt, sflag, &igmp_type,
42c11ccfe844c1 Nikolay Aleksandrov 2020-09-07 1446 need_rexmit);
eb1d16414339a6 Herbert Xu 2010-02-27 1447 if (!skb)
8ef2a9a5985499 YOSHIFUJI Hideaki 2010-04-18 1448 return;
eb1d16414339a6 Herbert Xu 2010-02-27 1449
eb1d16414339a6 Herbert Xu 2010-02-27 1450 if (port) {
eb1d16414339a6 Herbert Xu 2010-02-27 1451 skb->dev = port->dev;
a65056ecf4b48b Nikolay Aleksandrov 2016-07-06 1452 br_multicast_count(br, port, skb, igmp_type,
1080ab95e3c7bd Nikolay Aleksandrov 2016-06-28 1453 BR_MCAST_DIR_TX);
29a26a56803855 Eric W. Biederman 2015-09-15 1454 NF_HOOK(NFPROTO_BRIDGE, NF_BR_LOCAL_OUT,
29a26a56803855 Eric W. Biederman 2015-09-15 1455 dev_net(port->dev), NULL, skb, NULL, skb->dev,
f0b4eeced518c6 Linus Lüssing 2014-11-17 1456 br_dev_queue_push_xmit);
438ef2d027eb32 Nikolay Aleksandrov 2020-09-07 1457
438ef2d027eb32 Nikolay Aleksandrov 2020-09-07 1458 if (over_lmqt && with_srcs && sflag) {
438ef2d027eb32 Nikolay Aleksandrov 2020-09-07 1459 over_lmqt = false;
438ef2d027eb32 Nikolay Aleksandrov 2020-09-07 1460 goto again_under_lmqt;
438ef2d027eb32 Nikolay Aleksandrov 2020-09-07 1461 }
dc4eb53a996a78 Linus Lüssing 2014-06-07 1462 } else {
438ef2d027eb32 Nikolay Aleksandrov 2020-09-07 1463 br_multicast_select_own_querier(br, group, skb);
a65056ecf4b48b Nikolay Aleksandrov 2016-07-06 1464 br_multicast_count(br, port, skb, igmp_type,
1080ab95e3c7bd Nikolay Aleksandrov 2016-06-28 1465 BR_MCAST_DIR_RX);
eb1d16414339a6 Herbert Xu 2010-02-27 1466 netif_rx(skb);
8ef2a9a5985499 YOSHIFUJI Hideaki 2010-04-18 1467 }
dc4eb53a996a78 Linus Lüssing 2014-06-07 1468 }
8ef2a9a5985499 YOSHIFUJI Hideaki 2010-04-18 1469
:::::: The code at line 1430 was first introduced by commit
:::::: 8ef2a9a59854994bace13b5c4f7edc2c8d4d124e bridge br_multicast: Make functions less ipv4 dependent.
:::::: TO: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
:::::: CC: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org
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