[kbuild-all] net/wireless/reg.c:2425:13: warning: stack frame size of 1152 bytes in function 'wiphy_update_regulatory'

tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: 89698becf06d341a700913c3d89ce2a914af69a2 commit: c637693b20da8706b7f48d96882c9c80ae935151 ubsan: remove UBSAN_MISC in favor of individual options date: 4 months ago config: powerpc64-randconfig-r014-20210413 (attached as .config) compiler: clang version 13.0.0 (https://github.com/llvm/llvm-project 9829f5e6b1bca9b61efc629770d28bb9014dec45) 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... git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git git fetch --no-tags linus master git checkout c637693b20da8706b7f48d96882c9c80ae935151 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=powerpc64 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All warnings (new ones prefixed by >>): 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>:16:1: 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/wireless/reg.c:60: In file included from include/net/cfg80211.h:13: In file included from include/linux/ethtool.h:18: In file included from include/uapi/linux/ethtool.h:19: 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>:18:1: 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/wireless/reg.c:60: In file included from include/net/cfg80211.h:13: In file included from include/linux/ethtool.h:18: In file included from include/uapi/linux/ethtool.h:19: 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>:20:1: 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/wireless/reg.c:60: In file included from include/net/cfg80211.h:13: In file included from include/linux/ethtool.h:18: In file included from include/uapi/linux/ethtool.h:19: 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>:22:1: 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/wireless/reg.c:60: In file included from include/net/cfg80211.h:13: In file included from include/linux/ethtool.h:18: In file included from include/uapi/linux/ethtool.h:19: 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>:24:1: 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)) ~~~~~~~~~~~~~~~~~~~~~^ static void wiphy_update_regulatory(struct wiphy *wiphy, ^ 7 warnings generated. -- In file included from net/bluetooth/rfcomm/core.c:33: In file included from include/net/bluetooth/bluetooth.h:29: In file included from include/net/sock.h:38: In file included from include/linux/hardirq.h:10: In file included from arch/powerpc/include/asm/hardirq.h:6: In file included from include/linux/irq.h:20: In file included from include/linux/io.h:13: 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>:216:1: 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/bluetooth/rfcomm/core.c:33: In file included from include/net/bluetooth/bluetooth.h:29: In file included from include/net/sock.h:38: In file included from include/linux/hardirq.h:10: In file included from arch/powerpc/include/asm/hardirq.h:6: In file included from include/linux/irq.h:20: In file included from include/linux/io.h:13: 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>:218:1: 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/bluetooth/rfcomm/core.c:33: In file included from include/net/bluetooth/bluetooth.h:29: In file included from include/net/sock.h:38: In file included from include/linux/hardirq.h:10: In file included from arch/powerpc/include/asm/hardirq.h:6: In file included from include/linux/irq.h:20: In file included from include/linux/io.h:13: 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>:220:1: 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/bluetooth/rfcomm/core.c:33: In file included from include/net/bluetooth/bluetooth.h:29: In file included from include/net/sock.h:38: In file included from include/linux/hardirq.h:10: In file included from arch/powerpc/include/asm/hardirq.h:6: In file included from include/linux/irq.h:20: In file included from include/linux/io.h:13: 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>:222:1: 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/bluetooth/rfcomm/core.c:33: In file included from include/net/bluetooth/bluetooth.h:29: In file included from include/net/sock.h:38: In file included from include/linux/hardirq.h:10: In file included from arch/powerpc/include/asm/hardirq.h:6: In file included from include/linux/irq.h:20: In file included from include/linux/io.h:13: 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>:224:1: 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)) ~~~~~~~~~~~~~~~~~~~~~^ static void rfcomm_process_sessions(void) ^ 7 warnings generated. vim +/wiphy_update_regulatory +2425 net/wireless/reg.c ad932f046fbe98 Arik Nemtsov 2014-11-27 2424 eac03e381957a0 Sven Neumann 2011-08-30 @2425 static void wiphy_update_regulatory(struct wiphy *wiphy, 7db90f4a25bd41 Luis R. Rodriguez 2009-03-09 2426 enum nl80211_reg_initiator initiator) b2e1b30290539b Luis R. Rodriguez 2008-09-09 2427 { 57fbcce37be7c1 Johannes Berg 2016-04-12 2428 enum nl80211_band band; c492db370c17c4 Johannes Berg 2012-12-06 2429 struct regulatory_request *lr = get_last_request(); eac03e381957a0 Sven Neumann 2011-08-30 2430 0e3802dbfe53bc Luis R. Rodriguez 2013-11-05 2431 if (ignore_reg_update(wiphy, initiator)) { 0e3802dbfe53bc Luis R. Rodriguez 2013-11-05 2432 /* 0e3802dbfe53bc Luis R. Rodriguez 2013-11-05 2433 * Regulatory updates set by CORE are ignored for custom 0e3802dbfe53bc Luis R. Rodriguez 2013-11-05 2434 * regulatory cards. Let us notify the changes to the driver, 0e3802dbfe53bc Luis R. Rodriguez 2013-11-05 2435 * as some drivers used this to restore its orig_* reg domain. 0e3802dbfe53bc Luis R. Rodriguez 2013-11-05 2436 */ 0e3802dbfe53bc Luis R. Rodriguez 2013-11-05 2437 if (initiator == NL80211_REGDOM_SET_BY_CORE && e31f6456c01c76 Amar Singhal 2018-07-20 2438 wiphy->regulatory_flags & REGULATORY_CUSTOM_REG && e31f6456c01c76 Amar Singhal 2018-07-20 2439 !(wiphy->regulatory_flags & e31f6456c01c76 Amar Singhal 2018-07-20 2440 REGULATORY_WIPHY_SELF_MANAGED)) 0e3802dbfe53bc Luis R. Rodriguez 2013-11-05 2441 reg_call_notifier(wiphy, lr); a203c2aa4cefcc Sven Neumann 2011-07-12 2442 return; 0e3802dbfe53bc Luis R. Rodriguez 2013-11-05 2443 } a203c2aa4cefcc Sven Neumann 2011-07-12 2444 c492db370c17c4 Johannes Berg 2012-12-06 2445 lr->dfs_region = get_cfg80211_regdom()->dfs_region; b68e6b3b33b208 Luis R. Rodriguez 2011-10-11 2446 57fbcce37be7c1 Johannes Berg 2016-04-12 2447 for (band = 0; band < NUM_NL80211_BANDS; band++) fdc9d7b2863ce6 Johannes Berg 2012-12-03 2448 handle_band(wiphy, initiator, wiphy->bands[band]); a203c2aa4cefcc Sven Neumann 2011-07-12 2449 e38f8a7a8bebba Luis R. Rodriguez 2009-02-21 2450 reg_process_beacons(wiphy); 038659e7c6b385 Luis R. Rodriguez 2009-05-02 2451 reg_process_ht_flags(wiphy); 0e3802dbfe53bc Luis R. Rodriguez 2013-11-05 2452 reg_call_notifier(wiphy, lr); b2e1b30290539b Luis R. Rodriguez 2008-09-09 2453 } b2e1b30290539b Luis R. Rodriguez 2008-09-09 2454 :::::: The code at line 2425 was first introduced by commit :::::: eac03e381957a05f3842ceb8de987a1025966ecf cfg80211: hold reg_mutex when updating regulatory :::::: TO: Sven Neumann <s.neumann(a)raumfeld.com&gt; :::::: CC: John W. Linville <linville(a)tuxdriver.com&gt; --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org