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| author | Christophe Leroy <christophe.leroy@csgroup.eu> | 2021-10-08 18:58:40 +0200 |
|---|---|---|
| committer | Kees Cook <keescook@chromium.org> | 2021-12-17 00:54:37 +0100 |
| commit | bc93a22a19eb2b68a16ecf04cdf4b2ed65aaf398 (patch) | |
| tree | 5ab422ecde69b7bd598bcceee2546efa47a846aa /tools/testing | |
| parent | lkdtm: avoid printk() in recursive_loop() (diff) | |
| download | linux-bc93a22a19eb2b68a16ecf04cdf4b2ed65aaf398.tar.xz linux-bc93a22a19eb2b68a16ecf04cdf4b2ed65aaf398.zip | |
lkdtm: Fix content of section containing lkdtm_rodata_do_nothing()
On a kernel without CONFIG_STRICT_KERNEL_RWX, running EXEC_RODATA
test leads to "Illegal instruction" failure.
Looking at the content of rodata_objcopy.o, we see that the
function content zeroes only:
Disassembly of section .rodata:
0000000000000000 <.lkdtm_rodata_do_nothing>:
0: 00 00 00 00 .long 0x0
Add the contents flag in order to keep the content of the section
while renaming it.
Disassembly of section .rodata:
0000000000000000 <.lkdtm_rodata_do_nothing>:
0: 4e 80 00 20 blr
Fixes: e9e08a07385e ("lkdtm: support llvm-objcopy")
Cc: stable@vger.kernel.org
Cc: Kees Cook <keescook@chromium.org>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Nick Desaulniers <ndesaulniers@google.com>
Cc: Nathan Chancellor <nathan@kernel.org>
Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Reviewed-by: Nick Desaulniers <ndesaulniers@google.com>
Signed-off-by: Kees Cook <keescook@chromium.org>
Link: https://lore.kernel.org/r/8900731fbc05fb8b0de18af7133a8fc07c3c53a1.1633712176.git.christophe.leroy@csgroup.eu
Diffstat (limited to 'tools/testing')
0 files changed, 0 insertions, 0 deletions