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authorAndy Lutomirski <luto@kernel.org>2015-10-30 22:42:46 -0700
committerThomas Gleixner <tglx@linutronix.de>2015-10-31 09:50:25 +0100
commit2459ee8651dc5ab72790c2ffa99af288c7641b64 (patch)
tree6ddbab8ebd33416d3a37778b4ce0d59da619bd75
parent226f1f729ce277720fab60c91dd1b12574cfe66c (diff)
downloadlinux-stericsson-2459ee8651dc5ab72790c2ffa99af288c7641b64.tar.gz
x86/vm86: Set thread.vm86 to NULL on fork/clone
thread.vm86 points to per-task information -- the pointer should not be copied on clone. Fixes: d4ce0f26c790 ("x86/vm86: Move fields from 'struct kernel_vm86_struct' to 'struct 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/71c5d6985d70ec8197c8d72f003823c81b7dcf99.1446270067.git.luto@kernel.org Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
-rw-r--r--arch/x86/kernel/process.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/arch/x86/kernel/process.c b/arch/x86/kernel/process.c
index e28db181e4fc..9f7c21c22477 100644
--- a/arch/x86/kernel/process.c
+++ b/arch/x86/kernel/process.c
@@ -84,6 +84,9 @@ EXPORT_SYMBOL_GPL(idle_notifier_unregister);
int arch_dup_task_struct(struct task_struct *dst, struct task_struct *src)
{
memcpy(dst, src, arch_task_struct_size);
+#ifdef CONFIG_VM86
+ dst->thread.vm86 = NULL;
+#endif
return fpu__copy(&dst->thread.fpu, &src->thread.fpu);
}