| commit | 226f1f729ce277720fab60c91dd1b12574cfe66c | [log] [tgz] |
|---|---|---|
| author | Andy Lutomirski <luto@kernel.org> | Fri Oct 30 22:42:45 2015 -0700 |
| committer | Thomas Gleixner <tglx@linutronix.de> | Sat Oct 31 09:50:25 2015 +0100 |
| tree | 3f23c6e7248eae34da54f03d94d1c3258888f3a8 | |
| parent | ababae44108b0e94b58eef6cb5bd830bd040a47f [diff] |
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@kernel.org> Cc: Brian Gerst <brgerst@gmail.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Stas Sergeev <stsp@list.ru> Link: http://lkml.kernel.org/r/08f83295460a80e41dc5e3e81ec40d6844d316f5.1446270067.git.luto@kernel.org Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
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 @@ } clearhandler(SIGSEGV); + /* Make sure nothing explodes if we fork. */ + if (fork() > 0) + return 0; + return (nerrs == 0 ? 0 : 1); }