[PATCH v2] x86: Preserve iopl on fork and execve

[Alex Henrie]

Signed-off-by: Alex Henrie <alexhenrie24@xxxxxxxxx>
Suggested-by: Doug Johnson <dougvj@xxxxxxxxxx>
---
 arch/x86/kernel/process_32.c | 2 +-
 arch/x86/kernel/process_64.c | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/x86/kernel/process_32.c b/arch/x86/kernel/process_32.c
index 8ed2106..0ef7078 100644
--- a/arch/x86/kernel/process_32.c
+++ b/arch/x86/kernel/process_32.c
@@ -205,7 +205,7 @@ start_thread(struct pt_regs *regs, unsigned long new_ip, unsigned long new_sp)
 	regs->cs		= __USER_CS;
 	regs->ip		= new_ip;
 	regs->sp		= new_sp;
-	regs->flags		= X86_EFLAGS_IF;
+	regs->flags		= X86_EFLAGS_IF | (X86_EFLAGS_IOPL & regs->flags);
 	force_iret();
 }
 EXPORT_SYMBOL_GPL(start_thread);
diff --git a/arch/x86/kernel/process_64.c b/arch/x86/kernel/process_64.c
index ddfdbf7..e21eda2 100644
--- a/arch/x86/kernel/process_64.c
+++ b/arch/x86/kernel/process_64.c
@@ -238,7 +238,7 @@ start_thread_common(struct pt_regs *regs, unsigned long new_ip,
 	regs->sp		= new_sp;
 	regs->cs		= _cs;
 	regs->ss		= _ss;
-	regs->flags		= X86_EFLAGS_IF;
+	regs->flags		= X86_EFLAGS_IF | (X86_EFLAGS_IOPL & regs->flags);
 	force_iret();
 }
 
-- 
2.4.0

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