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| author | Andy Lutomirski <luto@kernel.org> | 2015-10-30 22:42:45 -0700 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2015-10-31 09:50:25 +0100 |
| commit | 226f1f729ce277720fab60c91dd1b12574cfe66c (patch) | |
| tree | 3f23c6e7248eae34da54f03d94d1c3258888f3a8 | |
| parent | ababae44108b0e94b58eef6cb5bd830bd040a47f (diff) | |
| download | lwn-226f1f729ce277720fab60c91dd1b12574cfe66c.tar.gz lwn-226f1f729ce277720fab60c91dd1b12574cfe66c.zip | |
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>
| -rw-r--r-- | tools/testing/selftests/x86/entry_from_vm86.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/tools/testing/selftests/x86/entry_from_vm86.c b/tools/testing/selftests/x86/entry_from_vm86.c index 421c607a8856..d075ea0e5ca1 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); } |