diff options
| author | Josh Poimboeuf <jpoimboe@redhat.com> | 2021-06-23 18:42:28 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2022-07-25 12:26:20 +0300 |
| commit | 364e463097a7c949e19fa93283f1a888ba96ed21 (patch) | |
| tree | fbba3697a0672219f07c7a9405db4e66e72cf292 /tools/objtool | |
| parent | f231b2ee8533d79b93bd163e93caf578d991726b (diff) | |
| download | linux-364e463097a7c949e19fa93283f1a888ba96ed21.tar.xz | |
objtool: Don't make .altinstructions writable
commit e31694e0a7a709293319475d8001e05e31f2178c upstream.
When objtool creates the .altinstructions section, it sets the SHF_WRITE
flag to make the section writable -- unless the section had already been
previously created by the kernel. The mismatch between kernel-created
and objtool-created section flags can cause failures with external
tooling (kpatch-build). And the section doesn't need to be writable
anyway.
Make the section flags consistent with the kernel's.
Fixes: 9bc0bb50727c ("objtool/x86: Rewrite retpoline thunk calls")
Reported-by: Joe Lawrence <joe.lawrence@redhat.com>
Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Link: https://lore.kernel.org/r/6c284ae89717889ea136f9f0064d914cd8329d31.1624462939.git.jpoimboe@redhat.com
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'tools/objtool')
| -rw-r--r-- | tools/objtool/arch/x86/decode.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/tools/objtool/arch/x86/decode.c b/tools/objtool/arch/x86/decode.c index 09035e28f472..b1feb45cf215 100644 --- a/tools/objtool/arch/x86/decode.c +++ b/tools/objtool/arch/x86/decode.c @@ -611,7 +611,7 @@ static int elf_add_alternative(struct elf *elf, sec = find_section_by_name(elf, ".altinstructions"); if (!sec) { sec = elf_create_section(elf, ".altinstructions", - SHF_WRITE, size, 0); + SHF_ALLOC, size, 0); if (!sec) { WARN_ELF("elf_create_section"); |