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-rw-r--r--0001-x86-fpu-Fix-invalid-FPU-ptrace-state-after-execve.patch65
1 files changed, 0 insertions, 65 deletions
diff --git a/0001-x86-fpu-Fix-invalid-FPU-ptrace-state-after-execve.patch b/0001-x86-fpu-Fix-invalid-FPU-ptrace-state-after-execve.patch
deleted file mode 100644
index 8cef8463520f..000000000000
--- a/0001-x86-fpu-Fix-invalid-FPU-ptrace-state-after-execve.patch
+++ /dev/null
@@ -1,65 +0,0 @@
-From 885bad1e5f32bbf30787ead9578f8174047e6904 Mon Sep 17 00:00:00 2001
-From: Yu-cheng Yu <yu-cheng.yu@intel.com>
-Date: Thu, 17 Nov 2016 09:11:35 -0800
-Subject: [PATCH] x86/fpu: Fix invalid FPU ptrace state after execve()
-
-commit b22cbe404a9cc3c7949e380fa1861e31934c8978 upstream.
-
-Robert O'Callahan reported that after an execve PTRACE_GETREGSET
-NT_X86_XSTATE continues to return the pre-exec register values
-until the exec'ed task modifies FPU state.
-
-The test code is at:
-
- https://bugzilla.redhat.com/attachment.cgi?id=1164286.
-
-What is happening is fpu__clear() does not properly clear fpstate.
-Fix it by doing just that.
-
-Reported-by: Robert O'Callahan <robert@ocallahan.org>
-Signed-off-by: Yu-cheng Yu <yu-cheng.yu@intel.com>
-Cc: Andy Lutomirski <luto@kernel.org>
-Cc: Borislav Petkov <bp@suse.de>
-Cc: David Hansen <dave.hansen@linux.intel.com>
-Cc: Fenghua Yu <fenghua.yu@intel.com>
-Cc: Linus Torvalds <torvalds@linux-foundation.org>
-Cc: Peter Zijlstra <peterz@infradead.org>
-Cc: Ravi V. Shankar <ravi.v.shankar@intel.com>
-Cc: Thomas Gleixner <tglx@linutronix.de>
-Link: http://lkml.kernel.org/r/1479402695-6553-1-git-send-email-yu-cheng.yu@intel.com
-Signed-off-by: Ingo Molnar <mingo@kernel.org>
-Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
----
- arch/x86/kernel/fpu/core.c | 16 ++++++++--------
- 1 file changed, 8 insertions(+), 8 deletions(-)
-
-diff --git a/arch/x86/kernel/fpu/core.c b/arch/x86/kernel/fpu/core.c
-index 3fc03a09a93b1710..c289e2f4a6e5b464 100644
---- a/arch/x86/kernel/fpu/core.c
-+++ b/arch/x86/kernel/fpu/core.c
-@@ -517,14 +517,14 @@ void fpu__clear(struct fpu *fpu)
- {
- WARN_ON_FPU(fpu != &current->thread.fpu); /* Almost certainly an anomaly */
-
-- if (!use_eager_fpu() || !static_cpu_has(X86_FEATURE_FPU)) {
-- /* FPU state will be reallocated lazily at the first use. */
-- fpu__drop(fpu);
-- } else {
-- if (!fpu->fpstate_active) {
-- fpu__activate_curr(fpu);
-- user_fpu_begin();
-- }
-+ fpu__drop(fpu);
-+
-+ /*
-+ * Make sure fpstate is cleared and initialized.
-+ */
-+ if (static_cpu_has(X86_FEATURE_FPU)) {
-+ fpu__activate_curr(fpu);
-+ user_fpu_begin();
- copy_init_fpstate_to_fpregs();
- }
- }
---
-2.10.2
-