# git rev-parse -q --verify 7efd182a94e167c2cb0187009ae1fffa8c485e97^{commit}
7efd182a94e167c2cb0187009ae1fffa8c485e97
already have revision, skipping fetch
# git checkout -q -f -B kisskb 7efd182a94e167c2cb0187009ae1fffa8c485e97
# git clean -qxdf
# < git log -1
# commit 7efd182a94e167c2cb0187009ae1fffa8c485e97
# Author: Christophe Leroy <christophe.leroy@csgroup.eu>
# Date:   Wed Oct 13 17:09:54 2021 +0200
# 
#     lkdtm: Add a test for function descriptors protection
#     
#     Add WRITE_OPD to check that you can't modify function
#     descriptors.
#     
#     Gives the following result when function descriptors are
#     not protected:
#     
#             lkdtm: Performing direct entry WRITE_OPD
#             lkdtm: attempting bad 16 bytes write at c00000000269b358
#             lkdtm: FAIL: survived bad write
#             lkdtm: do_nothing was hijacked!
#     
#     Looks like a standard compiler barrier() is not enough to force
#     GCC to use the modified function descriptor. Had to add a fake empty
#     inline assembly to force GCC to reload the function descriptor.
#     
#     Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
#     Acked-by: Kees Cook <keescook@chromium.org>
# < /opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux-gcc --version
# < /opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux-ld --version
# < git log --format=%s --max-count=1 7efd182a94e167c2cb0187009ae1fffa8c485e97
# < make -s -j 48 ARCH=powerpc O=/kisskb/build/chleroy_mpc85xx_smp_defconfig_powerpc-gcc5 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux-  mpc85xx_smp_defconfig
# < make -s -j 48 ARCH=powerpc O=/kisskb/build/chleroy_mpc85xx_smp_defconfig_powerpc-gcc5 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux-  help
# make -s -j 48 ARCH=powerpc O=/kisskb/build/chleroy_mpc85xx_smp_defconfig_powerpc-gcc5 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux-  olddefconfig
# make -s -j 48 ARCH=powerpc O=/kisskb/build/chleroy_mpc85xx_smp_defconfig_powerpc-gcc5 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux-  
In file included from /kisskb/src/include/linux/build_bug.h:5:0,
                 from /kisskb/src/include/linux/container_of.h:5,
                 from /kisskb/src/include/linux/list.h:5,
                 from /kisskb/src/include/linux/module.h:12,
                 from /kisskb/src/drivers/net/ethernet/freescale/fs_enet/mac-scc.c:15:
/kisskb/src/drivers/net/ethernet/freescale/fs_enet/mac-scc.c: In function 'allocate_bd':
/kisskb/src/include/linux/err.h:22:49: warning: cast to pointer from integer of different size [-Wint-to-pointer-cast]
 #define IS_ERR_VALUE(x) unlikely((unsigned long)(void *)(x) >= (unsigned long)-MAX_ERRNO)
                                                 ^
/kisskb/src/include/linux/compiler.h:78:42: note: in definition of macro 'unlikely'
 # define unlikely(x) __builtin_expect(!!(x), 0)
                                          ^
/kisskb/src/drivers/net/ethernet/freescale/fs_enet/mac-scc.c:139:6: note: in expansion of macro 'IS_ERR_VALUE'
  if (IS_ERR_VALUE(fep->ring_mem_addr))
      ^
/kisskb/src/arch/powerpc/boot/dts/fsl/mpc8541cds.dts:341.15-350.5: Warning (pci_device_reg): /pci@e0008000/i8259@19000: PCI unit address format error, expected "12,0"
/kisskb/src/arch/powerpc/boot/dts/fsl/mpc8541cds.dts:330.3-21: Warning (pci_device_bus_num): /pci@e0008000/i8259@19000:bus-range: PCI bus number 1 out of range, expected (0 - 0)
/kisskb/src/arch/powerpc/boot/dts/fsl/mpc8555cds.dts:341.15-350.5: Warning (pci_device_reg): /pci@e0008000/i8259@19000: PCI unit address format error, expected "12,0"
/kisskb/src/arch/powerpc/boot/dts/fsl/mpc8555cds.dts:330.3-21: Warning (pci_device_bus_num): /pci@e0008000/i8259@19000:bus-range: PCI bus number 1 out of range, expected (0 - 0)
Completed OK
# rm -rf /kisskb/build/chleroy_mpc85xx_smp_defconfig_powerpc-gcc5
# Build took: 0:02:28.224732