# git rev-parse -q --verify ffcf9c5700e49c0aee42dcba9a12ba21338e8136^{commit} ffcf9c5700e49c0aee42dcba9a12ba21338e8136 already have revision, skipping fetch # git checkout -q -f -B kisskb ffcf9c5700e49c0aee42dcba9a12ba21338e8136 # git clean -qxdf # < git log -1 # commit ffcf9c5700e49c0aee42dcba9a12ba21338e8136 # Author: Nick Desaulniers # Date: Wed Aug 10 15:24:41 2022 -0700 # # x86: link vdso and boot with -z noexecstack --no-warn-rwx-segments # # Users of GNU ld (BFD) from binutils 2.39+ will observe multiple # instances of a new warning when linking kernels in the form: # # ld: warning: arch/x86/boot/pmjump.o: missing .note.GNU-stack section implies executable stack # ld: NOTE: This behaviour is deprecated and will be removed in a future version of the linker # ld: warning: arch/x86/boot/compressed/vmlinux has a LOAD segment with RWX permissions # # Generally, we would like to avoid the stack being executable. Because # there could be a need for the stack to be executable, assembler sources # have to opt-in to this security feature via explicit creation of the # .note.GNU-stack feature (which compilers create by default) or command # line flag --noexecstack. Or we can simply tell the linker the # production of such sections is irrelevant and to link the stack as # --noexecstack. # # LLVM's LLD linker defaults to -z noexecstack, so this flag isn't # strictly necessary when linking with LLD, only BFD, but it doesn't hurt # to be explicit here for all linkers IMO. --no-warn-rwx-segments is # currently BFD specific and only available in the current latest release, # so it's wrapped in an ld-option check. # # While the kernel makes extensive usage of ELF sections, it doesn't use # permissions from ELF segments. # # Link: https://lore.kernel.org/linux-block/3af4127a-f453-4cf7-f133-a181cce06f73@kernel.dk/ # Link: https://sourceware.org/git/?p=binutils-gdb.git;a=commit;h=ba951afb99912da01a6e8434126b8fac7aa75107 # Link: https://github.com/llvm/llvm-project/issues/57009 # Reported-and-tested-by: Jens Axboe # Suggested-by: Fangrui Song # Signed-off-by: Nick Desaulniers # Signed-off-by: Linus Torvalds # < /opt/cross/kisskb/korg/gcc-11.1.0-nolibc/m68k-linux/bin/m68k-linux-gcc --version # < /opt/cross/kisskb/korg/gcc-11.1.0-nolibc/m68k-linux/bin/m68k-linux-ld --version # < git log --format=%s --max-count=1 ffcf9c5700e49c0aee42dcba9a12ba21338e8136 # < make -s -j 8 ARCH=m68k O=/kisskb/build/linus_sun3_defconfig_m68k-gcc11 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-11.1.0-nolibc/m68k-linux/bin/m68k-linux- sun3_defconfig # < make -s -j 8 ARCH=m68k O=/kisskb/build/linus_sun3_defconfig_m68k-gcc11 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-11.1.0-nolibc/m68k-linux/bin/m68k-linux- help # make -s -j 8 ARCH=m68k O=/kisskb/build/linus_sun3_defconfig_m68k-gcc11 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-11.1.0-nolibc/m68k-linux/bin/m68k-linux- olddefconfig # make -s -j 8 ARCH=m68k O=/kisskb/build/linus_sun3_defconfig_m68k-gcc11 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-11.1.0-nolibc/m68k-linux/bin/m68k-linux- In file included from /kisskb/src/include/linux/string.h:20, from /kisskb/src/include/linux/bitmap.h:11, from /kisskb/src/include/linux/cpumask.h:12, from /kisskb/src/include/linux/mm_types_task.h:14, from /kisskb/src/include/linux/mm_types.h:5, from /kisskb/src/include/linux/buildid.h:5, from /kisskb/src/include/linux/module.h:14, from /kisskb/src/drivers/net/ethernet/i825xx/sun3_82586.c:32: In function 'check586', inlined from 'sun3_82586_probe1' at /kisskb/src/drivers/net/ethernet/i825xx/sun3_82586.c:365:6, inlined from 'sun3_82586_probe' at /kisskb/src/drivers/net/ethernet/i825xx/sun3_82586.c:311:8: /kisskb/src/arch/m68k/include/asm/string.h:68:25: warning: '__builtin_memset' offset [0, 11] is out of the bounds [0, 0] [-Warray-bounds] 68 | #define memset(d, c, n) __builtin_memset(d, c, n) | ^~~~~~~~~~~~~~~~~~~~~~~~~ /kisskb/src/drivers/net/ethernet/i825xx/sun3_82586.c:218:9: note: in expansion of macro 'memset' 218 | memset((char *)p->scp,0, sizeof(struct scp_struct)); | ^~~~~~ In file included from /kisskb/src/include/linux/swab.h:5, from /kisskb/src/include/uapi/linux/byteorder/big_endian.h:14, from /kisskb/src/include/linux/byteorder/big_endian.h:5, from /kisskb/src/arch/m68k/include/uapi/asm/byteorder.h:5, from /kisskb/src/include/asm-generic/bitops/le.h:6, from /kisskb/src/arch/m68k/include/asm/bitops.h:548, from /kisskb/src/include/linux/bitops.h:67, from /kisskb/src/include/linux/kernel.h:22, from /kisskb/src/drivers/net/ethernet/i825xx/sun3_82586.c:31: /kisskb/src/drivers/net/ethernet/i825xx/sun3_82586.c: In function 'sun3_82586_timeout': /kisskb/src/drivers/net/ethernet/i825xx/sun3_82586.c:989:122: warning: array subscript 1 is above array bounds of 'volatile struct transmit_cmd_struct *[1]' [-Warray-bounds] 989 | printk("%s: command-stats: %04x %04x\n",dev->name,swab16(p->xmit_cmds[0]->cmd_status),swab16(p->xmit_cmds[1]->cmd_status)); | ~~~~~~~~~~~~^~~ /kisskb/src/include/uapi/linux/swab.h:107:19: note: in definition of macro '__swab16' 107 | __fswab16(x)) | ^ /kisskb/src/include/linux/printk.h:464:26: note: in expansion of macro 'printk_index_wrap' 464 | #define printk(fmt, ...) printk_index_wrap(_printk, fmt, ##__VA_ARGS__) | ^~~~~~~~~~~~~~~~~ /kisskb/src/drivers/net/ethernet/i825xx/sun3_82586.c:989:17: note: in expansion of macro 'printk' 989 | printk("%s: command-stats: %04x %04x\n",dev->name,swab16(p->xmit_cmds[0]->cmd_status),swab16(p->xmit_cmds[1]->cmd_status)); | ^~~~~~ /kisskb/src/drivers/net/ethernet/i825xx/sun3_82586.c:155:46: note: while referencing 'xmit_cmds' 155 | volatile struct transmit_cmd_struct *xmit_cmds[NUM_XMIT_BUFFS]; | ^~~~~~~~~ Completed OK # rm -rf /kisskb/build/linus_sun3_defconfig_m68k-gcc11 # Build took: 0:04:17.804611