This is v7 of the compile-time stack validation patch set, based on the tip/master branch. v6, which had a lot of major changes, can be found here: https://lkml.kernel.org/r/cover.1436280380.git.jpoimboe@xxxxxxxxxx For more information about the motivation behind this patch set, and more details about what it does, please see the changelog in patch 2. To reduce churn, I didn't bother posting any patches to fix warnings. If there's agreement on this approach, I can start proposing fixes. Posting a listing of reported warnings in a reply to this email. v7: - sibling call support - document proposed solution for inline asm() frame pointer issues - say "kernel entry/exit" instead of "context switch" - clarify the checking of switch statement jump tables - discard __stackvalidate_ignore_* sections in linker script - use .Ltemp_\@ to get a unique label instead of static 3-digit number - change STACKVALIDATE_IGNORE_FUNC variable to a static - move STACKVALIDATE_IGNORE_INSN to arch-specific .h file v6: - rename asmvalidate -> stackvalidate (again) - gcc-generated object file support - recursive branch state analysis - external jump support - fixup/exception table support - jump label support - switch statement jump table support - added documentation - detection of "noreturn" dead end functions - added a Kbuild mechanism for skipping files and dirs - moved frame pointer macros to arch/x86/include/asm/frame.h - moved ignore macros to include/linux/stackvalidate.h v5: - stackvalidate -> asmvalidate - frame pointers only required for non-leaf functions - check for the use of the FP_SAVE/RESTORE macros instead of manually analyzing code to detect frame pointer usage - additional checks to ensure each function doesn't leave its boundaries - make the macros simpler and more flexible - support for analyzing ALTERNATIVE macros - simplified the arch interfaces in scripts/asmvalidate/arch.h - fixed some asmvalidate warnings - rebased onto latest tip asm cleanups - many more small changes v4: - Changed the default to CONFIG_STACK_VALIDATION=n, until all the asm code can get cleaned up. - Fixed a stackvalidate error path exit code issue found by Michal Marek. v3: - Added a patch to make the push/pop CFI macros arch-independent, as suggested by H. Peter Anvin v2: - Fixed memory leaks reported by Petr Mladek Josh Poimboeuf (4): x86/asm: Frame pointer macro cleanup x86/stackvalidate: Compile-time stack validation x86/stackvalidate: Add file and directory ignores x86/stackvalidate: Add ignore macros Documentation/stack-validation.txt | 193 ++++++++ MAINTAINERS | 8 + arch/Kconfig | 6 + arch/x86/Kconfig | 1 + arch/x86/Makefile | 6 +- arch/x86/boot/Makefile | 3 +- arch/x86/boot/compressed/Makefile | 3 +- arch/x86/entry/vdso/Makefile | 5 +- arch/x86/include/asm/frame.h | 37 +- arch/x86/include/asm/stackvalidate.h | 28 ++ arch/x86/kernel/vmlinux.lds.S | 5 +- arch/x86/purgatory/Makefile | 2 + arch/x86/realmode/Makefile | 4 +- arch/x86/realmode/rm/Makefile | 3 +- drivers/firmware/efi/libstub/Makefile | 1 + include/linux/stackvalidate.h | 21 + lib/Kconfig.debug | 11 + scripts/Makefile | 1 + scripts/Makefile.build | 34 +- scripts/stackvalidate/Makefile | 24 + scripts/stackvalidate/arch-x86.c | 148 ++++++ scripts/stackvalidate/arch.h | 44 ++ scripts/stackvalidate/elf.c | 422 ++++++++++++++++ scripts/stackvalidate/elf.h | 85 ++++ scripts/stackvalidate/list.h | 217 +++++++++ scripts/stackvalidate/special.c | 177 +++++++ scripts/stackvalidate/special.h | 40 ++ scripts/stackvalidate/stackvalidate.c | 881 ++++++++++++++++++++++++++++++++++ 28 files changed, 2382 insertions(+), 28 deletions(-) create mode 100644 Documentation/stack-validation.txt create mode 100644 arch/x86/include/asm/stackvalidate.h create mode 100644 include/linux/stackvalidate.h create mode 100644 scripts/stackvalidate/Makefile create mode 100644 scripts/stackvalidate/arch-x86.c create mode 100644 scripts/stackvalidate/arch.h create mode 100644 scripts/stackvalidate/elf.c create mode 100644 scripts/stackvalidate/elf.h create mode 100644 scripts/stackvalidate/list.h create mode 100644 scripts/stackvalidate/special.c create mode 100644 scripts/stackvalidate/special.h create mode 100644 scripts/stackvalidate/stackvalidate.c -- 2.1.0 -- To unsubscribe from this list: send the line "unsubscribe live-patching" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
