PPC64/IA64/PARISC have function descriptors. LKDTM doesn't work on those three architectures because LKDTM messes up function descriptors with functions. This series does some cleanup in the three architectures and refactors function descriptors so that it can then easily use it in a generic way in LKDTM. Changes in v4: - Added patch 1 which Fixes 'sparse' for powerpc64le after wrong report on previous series, refer https://github.com/ruscur/linux-ci/actions/runs/1351427671 - Exported dereference_function_descriptor() to modules - Addressed other received comments - Rebased on latest powerpc/next (5a72345e6a78120368fcc841b570331b6c5a50da) Changes in v3: - Addressed received comments - Swapped some of the powerpc patches to keep func_descr_t renamed as struct func_desc and remove 'struct ppc64_opd_entry' - Changed HAVE_FUNCTION_DESCRIPTORS macro to a config item CONFIG_HAVE_FUNCTION_DESCRIPTORS - Dropped patch 11 ("Fix lkdtm_EXEC_RODATA()") Changes in v2: - Addressed received comments - Moved dereference_[kernel]_function_descriptor() out of line - Added patches to remove func_descr_t and func_desc_t in powerpc - Using func_desc_t instead of funct_descr_t - Renamed HAVE_DEREFERENCE_FUNCTION_DESCRIPTOR to HAVE_FUNCTION_DESCRIPTORS - Added a new lkdtm test to check protection of function descriptors Christophe Leroy (13): powerpc: Fix 'sparse' checking on PPC64le powerpc: Move and rename func_descr_t powerpc: Use 'struct func_desc' instead of 'struct ppc64_opd_entry' powerpc: Remove 'struct ppc64_opd_entry' powerpc: Prepare func_desc_t for refactorisation ia64: Rename 'ip' to 'addr' in 'struct fdesc' asm-generic: Define CONFIG_HAVE_FUNCTION_DESCRIPTORS asm-generic: Define 'func_desc_t' to commonly describe function descriptors asm-generic: Refactor dereference_[kernel]_function_descriptor() lkdtm: Force do_nothing() out of line lkdtm: Really write into kernel text in WRITE_KERN lkdtm: Fix execute_[user]_location() lkdtm: Add a test for function descriptors protection arch/Kconfig | 3 + arch/ia64/Kconfig | 1 + arch/ia64/include/asm/elf.h | 2 +- arch/ia64/include/asm/sections.h | 24 +------- arch/ia64/kernel/module.c | 6 +- arch/parisc/Kconfig | 1 + arch/parisc/include/asm/sections.h | 16 ++---- arch/parisc/kernel/process.c | 21 ------- arch/powerpc/Kconfig | 1 + arch/powerpc/Makefile | 2 +- arch/powerpc/include/asm/code-patching.h | 2 +- arch/powerpc/include/asm/elf.h | 6 ++ arch/powerpc/include/asm/sections.h | 29 ++-------- arch/powerpc/include/asm/types.h | 6 -- arch/powerpc/include/uapi/asm/elf.h | 8 --- arch/powerpc/kernel/module_64.c | 42 ++++++-------- arch/powerpc/kernel/ptrace/ptrace.c | 6 ++ arch/powerpc/kernel/signal_64.c | 8 +-- drivers/misc/lkdtm/core.c | 1 + drivers/misc/lkdtm/lkdtm.h | 1 + drivers/misc/lkdtm/perms.c | 71 +++++++++++++++++++----- include/asm-generic/sections.h | 15 ++++- include/linux/kallsyms.h | 2 +- kernel/extable.c | 24 +++++++- tools/testing/selftests/lkdtm/tests.txt | 1 + 25 files changed, 155 insertions(+), 144 deletions(-) -- 2.34.1
