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Groups > linux.kernel > #1259940 > unrolled thread
| Started by | Andy Lutomirski <luto@kernel.org> |
|---|---|
| First post | 2015-10-31 06:50 +0100 |
| Last post | 2015-10-31 10:00 +0100 |
| Articles | 3 — 2 participants |
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[PATCH urgent 0/2] x86: vm86 fix and test Andy Lutomirski <luto@kernel.org> - 2015-10-31 06:50 +0100
[PATCH urgent 1/2] selftests/x86: Add a fork() to entry_from_vm86 to catch fork bugs Andy Lutomirski <luto@kernel.org> - 2015-10-31 06:50 +0100
[tip:x86/urgent] selftests/x86: Add a fork() to entry_from_vm86 to catch fork bugs tip-bot for Andy Lutomirski <tipbot@zytor.com> - 2015-10-31 10:00 +0100
| From | Andy Lutomirski <luto@kernel.org> |
|---|---|
| Date | 2015-10-31 06:50 +0100 |
| Subject | [PATCH urgent 0/2] x86: vm86 fix and test |
| Message-ID | <qpxd7-7ms-5@gated-at.bofh.it> |
Calling vm86 and then forking will corrupt things. Fix it. This is for x86/urgent. It fixes a 4.3 regression. Andy Lutomirski (2): selftests/x86: Add a fork() to entry_from_vm86 to catch fork bugs x86/vm86: Set thread.vm86 to NULL on fork/clone arch/x86/kernel/process.c | 3 +++ tools/testing/selftests/x86/entry_from_vm86.c | 4 ++++ 2 files changed, 7 insertions(+) -- 2.4.3 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.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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| From | Andy Lutomirski <luto@kernel.org> |
|---|---|
| Date | 2015-10-31 06:50 +0100 |
| Subject | [PATCH urgent 1/2] selftests/x86: Add a fork() to entry_from_vm86 to catch fork bugs |
| Message-ID | <qpxd7-7ms-15@gated-at.bofh.it> |
| In reply to | #1259940 |
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> --- 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@vger.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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| From | tip-bot for Andy Lutomirski <tipbot@zytor.com> |
|---|---|
| Date | 2015-10-31 10:00 +0100 |
| Subject | [tip:x86/urgent] selftests/x86: Add a fork() to entry_from_vm86 to catch fork bugs |
| Message-ID | <qpAaZ-EJ-1@gated-at.bofh.it> |
| In reply to | #1259941 |
Commit-ID: 226f1f729ce277720fab60c91dd1b12574cfe66c Gitweb: http://git.kernel.org/tip/226f1f729ce277720fab60c91dd1b12574cfe66c Author: Andy Lutomirski <luto@kernel.org> AuthorDate: Fri, 30 Oct 2015 22:42:45 -0700 Committer: Thomas Gleixner <tglx@linutronix.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@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> --- 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@vger.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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