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UBUNTU: SAUCE: objtool: make objtool RETPOLINE validation fatal when building with CONFIG_RETPOLINE=y

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BugLink: https://bugs.launchpad.net/bugs/2046440

Make objtool RETPOLINE validation fatal when building with
CONFIG_RETPOLINE=y, currently it is a build.log warning only.

This is a standalone patch, such that if regressions are identified
(with any config or toolchain configuration) it can be reverted until
relevant identified code is fixed up or otherwise
ignored/silecned/marked as safe.

Signed-off-by: Dimitri John Ledkov <dimitri.ledkov@canonical.com>
Link: https://lore.kernel.org/all/20231213134303.2302285-4-dimitri.ledkov@canonical.com/
Signed-off-by: Andrea Righi <andrea.righi@canonical.com>
This commit is contained in:
Dimitri John Ledkov
2023-12-13 12:38:23 +00:00
committed by Paolo Pisati
parent 640a8fa0d2
commit 9c888e2099
1 changed files with 4 additions and 1 deletions
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tools/objtool/check.c
+4 -1
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@@ -3991,7 +3991,10 @@ static int validate_retpoline(struct objtool_file *file)
warnings++;
}
return warnings;
/* RETPOLINE is an optional security safety feature, make it
* fatal to ensure no new code is introduced that fails
* RETPOLINE */
return -warnings;
}
static bool is_kasan_insn(struct instruction *insn)