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Date: Sat, 31 Oct 2015 01:54:47 -0700 From: tip-bot for Andy Lutomirski <tipbot@...or.com> To: linux-tip-commits@...r.kernel.org Cc: linux-kernel@...r.kernel.org, hpa@...or.com, luto@...nel.org, tglx@...utronix.de, stsp@...t.ru, torvalds@...ux-foundation.org, mingo@...nel.org, bp@...en8.de, brgerst@...il.com Subject: [tip:x86/urgent] selftests/x86: Add a fork() to entry_from_vm86 to catch fork bugs Commit-ID: 226f1f729ce277720fab60c91dd1b12574cfe66c Gitweb: http://git.kernel.org/tip/226f1f729ce277720fab60c91dd1b12574cfe66c Author: Andy Lutomirski <luto@...nel.org> AuthorDate: Fri, 30 Oct 2015 22:42:45 -0700 Committer: Thomas Gleixner <tglx@...utronix.de> CommitDate: Sat, 31 Oct 2015 09:50:25 +0100 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> Cc: Brian Gerst <brgerst@...il.com> Cc: Linus Torvalds <torvalds@...ux-foundation.org> Cc: Borislav Petkov <bp@...en8.de> Cc: Stas Sergeev <stsp@...t.ru> Link: http://lkml.kernel.org/r/08f83295460a80e41dc5e3e81ec40d6844d316f5.1446270067.git.luto@kernel.org Signed-off-by: Thomas Gleixner <tglx@...utronix.de> --- 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 421c607..d075ea0 100644 --- a/tools/testing/selftests/x86/entry_from_vm86.c +++ b/tools/testing/selftests/x86/entry_from_vm86.c @@ -230,5 +230,9 @@ int main(void) } clearhandler(SIGSEGV); + /* Make sure nothing explodes if we fork. */ + if (fork() > 0) + return 0; + return (nerrs == 0 ? 0 : 1); } -- 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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