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objtool: Fail the kernel build on fatal errors

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When objtool encounters a fatal error, it usually means the binary is
corrupt or otherwise broken in some way.  Up until now, such errors were
just treated as warnings which didn't fail the kernel build.

However, objtool is now stable enough that if a fatal error is
discovered, it most likely means something is seriously wrong and it
should fail the kernel build.

Note that this doesn't apply to "normal" objtool warnings; only fatal
ones.

Suggested-by: Borislav Petkov <bp@suse.de>
Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Reviewed-by: Julien Thierry <jthierry@redhat.com>
Link: https://lkml.kernel.org/r/f18c3743de0fef673d49dd35760f26bdef7f6fc3.1581359535.git.jpoimboe@redhat.com
This commit is contained in:
Josh Poimboeuf 2020-02-10 12:32:38 -06:00 committed by Borislav Petkov
parent bb6d3fb354
commit 644592d328
1 changed files with 9 additions and 3 deletions
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12
tools/objtool/check.c
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@ -2491,8 +2491,14 @@ int check(const char *_objname, bool orc)
out:
cleanup(&file);
/* ignore warnings for now until we get all the code cleaned up */
if (ret || warnings)
return 0;
if (ret < 0) {
/*
* Fatal error. The binary is corrupt or otherwise broken in
* some way, or objtool itself is broken. Fail the kernel
* build.
*/
return ret;
}
return 0;
}