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Message-Id: <08f83295460a80e41dc5e3e81ec40d6844d316f5.1446270067.git.luto@kernel.org> Date: Fri, 30 Oct 2015 22:42:45 -0700 From: Andy Lutomirski <luto@...nel.org> To: x86@...nel.org, linux-kernel@...r.kernel.org Cc: Brian Gerst <brgerst@...il.com>, Linus Torvalds <torvalds@...ux-foundation.org>, Borislav Petkov <bp@...en8.de>, Stas Sergeev <stsp@...t.ru>, Andy Lutomirski <luto@...nel.org> Subject: [PATCH urgent 1/2] selftests/x86: Add a fork() to entry_from_vm86 to catch fork bugs Mere possession of vm86 state is strange. Make sure that nothing gets corrupted if we fork after calling vm86(). Signed-off-by: Andy Lutomirski <luto@...nel.org> --- tools/testing/selftests/x86/entry_from_vm86.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/tools/testing/selftests/x86/entry_from_vm86.c b/tools/testing/selftests/x86/entry_from_vm86.c index 9a43a59a9bb4..13b2965472e3 100644 --- a/tools/testing/selftests/x86/entry_from_vm86.c +++ b/tools/testing/selftests/x86/entry_from_vm86.c @@ -229,5 +229,9 @@ int main(void) } clearhandler(SIGSEGV); + /* Make sure nothing explodes if we fork. */ + if (fork() > 0) + return 0; + return (nerrs == 0 ? 0 : 1); } -- 2.4.3 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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