tree: https://github.com/ammarfaizi2/linux-block axboe/linux-block/for-next head: f46c4db86bee760a24f38093a76a2a2688a6b76e commit: a8b38c4ce7240d869c820d457bcd51e452149510 [18/97] io_uring: support multishot in recvmsg config: powerpc-lite5200b_defconfig compiler: clang version 15.0.0 (https://github.com/llvm/llvm-project 5e61b9c556267086ef9b743a0b57df302eef831b) 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 powerpc cross compiling tool for clang build # apt-get install binutils-powerpc-linux-gnu # https://github.com/ammarfaizi2/linux-block/commit/a8b38c4ce7240d869c820d457bcd51e452149510 git remote add ammarfaizi2-block https://github.com/ammarfaizi2/linux-block git fetch --no-tags ammarfaizi2-block axboe/linux-block/for-next git checkout a8b38c4ce7240d869c820d457bcd51e452149510 # 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=powerpc SHELL=/bin/bash If you fix the issue, kindly add following tag where applicable Reported-by: kernel test robot All warnings (new ones prefixed by >>): ^ arch/powerpc/include/asm/io.h:579:56: 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 io_uring/net.c:13: In file included from io_uring/io_uring.h:6: In file included from include/linux/io_uring_types.h:4: In file included from include/linux/blkdev.h:9: In file included from include/linux/blk_types.h:10: In file included from include/linux/bvec.h:10: In file included from include/linux/highmem.h:11: In file included from include/linux/hardirq.h:11: 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:641: 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:638:3: note: expanded from macro 'DEF_PCI_AC_NORET' __do_##name al; \ ^~~~~~~~~~~~~~ :5:1: note: expanded from here __do_insl ^ arch/powerpc/include/asm/io.h:580:56: 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 io_uring/net.c:13: In file included from io_uring/io_uring.h:6: In file included from include/linux/io_uring_types.h:4: In file included from include/linux/blkdev.h:9: In file included from include/linux/blk_types.h:10: In file included from include/linux/bvec.h:10: In file included from include/linux/highmem.h:11: In file included from include/linux/hardirq.h:11: 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:641: 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:638:3: note: expanded from macro 'DEF_PCI_AC_NORET' __do_##name al; \ ^~~~~~~~~~~~~~ :7:1: note: expanded from here __do_outsb ^ arch/powerpc/include/asm/io.h:581:58: 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 io_uring/net.c:13: In file included from io_uring/io_uring.h:6: In file included from include/linux/io_uring_types.h:4: In file included from include/linux/blkdev.h:9: In file included from include/linux/blk_types.h:10: In file included from include/linux/bvec.h:10: In file included from include/linux/highmem.h:11: In file included from include/linux/hardirq.h:11: 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:641: 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:638:3: note: expanded from macro 'DEF_PCI_AC_NORET' __do_##name al; \ ^~~~~~~~~~~~~~ :9:1: note: expanded from here __do_outsw ^ arch/powerpc/include/asm/io.h:582:58: 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 io_uring/net.c:13: In file included from io_uring/io_uring.h:6: In file included from include/linux/io_uring_types.h:4: In file included from include/linux/blkdev.h:9: In file included from include/linux/blk_types.h:10: In file included from include/linux/bvec.h:10: In file included from include/linux/highmem.h:11: In file included from include/linux/hardirq.h:11: 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:641: 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:638:3: note: expanded from macro 'DEF_PCI_AC_NORET' __do_##name al; \ ^~~~~~~~~~~~~~ :11:1: note: expanded from here __do_outsl ^ arch/powerpc/include/asm/io.h:583:58: note: expanded from macro '__do_outsl' #define __do_outsl(p, b, n) writesl((PCI_IO_ADDR)_IO_BASE+(p),(b),(n)) ~~~~~~~~~~~~~~~~~~~~~^ >> io_uring/net.c:332:6: warning: comparison of distinct pointer types ('typeof (sizeof(struct io_uring_recvmsg_out)) *' (aka 'unsigned int *') and 'typeof ((unsigned long)iomsg->namelen) *' (aka 'unsigned long *')) [-Wcompare-distinct-pointer-types] if (check_add_overflow(sizeof(struct io_uring_recvmsg_out), ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/linux/overflow.h:67:15: note: expanded from macro 'check_add_overflow' (void) (&__a == &__b); \ ~~~~ ^ ~~~~ >> io_uring/net.c:332:6: warning: comparison of distinct pointer types ('typeof (sizeof(struct io_uring_recvmsg_out)) *' (aka 'unsigned int *') and 'typeof (&hdr)' (aka 'unsigned long *')) [-Wcompare-distinct-pointer-types] if (check_add_overflow(sizeof(struct io_uring_recvmsg_out), ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/linux/overflow.h:68:15: note: expanded from macro 'check_add_overflow' (void) (&__a == __d); \ ~~~~ ^ ~~~ >> io_uring/net.c:335:6: warning: comparison of distinct pointer types ('typeof (hdr) *' (aka 'unsigned long *') and 'typeof (iomsg->controllen) *' (aka 'unsigned int *')) [-Wcompare-distinct-pointer-types] if (check_add_overflow(hdr, iomsg->controllen, &hdr)) ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/linux/overflow.h:67:15: note: expanded from macro 'check_add_overflow' (void) (&__a == &__b); \ ~~~~ ^ ~~~~ 9 warnings generated. vim +332 io_uring/net.c 327 328 static bool io_recvmsg_multishot_overflow(struct io_async_msghdr *iomsg) 329 { 330 unsigned long hdr; 331 > 332 if (check_add_overflow(sizeof(struct io_uring_recvmsg_out), 333 (unsigned long)iomsg->namelen, &hdr)) 334 return true; > 335 if (check_add_overflow(hdr, iomsg->controllen, &hdr)) 336 return true; 337 if (hdr > INT_MAX) 338 return true; 339 340 return false; 341 } 342 -- 0-DAY CI Kernel Test Service https://01.org/lkp