Commit ce5f7a99 authored Feb 25, 2012 by Bobby Powers Committed by H. Peter Anvin Feb 25, 2012

x32: Make sure TS_COMPAT is cleared for x32 tasks



If a process has a non-x32 ia32 personality and changes to x32, the
process would keep its TS_COMPAT flag. x32 uses the presence of the
x32 flag on a syscall to determine compat status, so make sure
TS_COMPAT is cleared.

Signed-off-by: Bobby Powers <bobbypowers@gmail.com>
Link: http://lkml.kernel.org/r/1330230338-25077-1-git-send-email-bobbypowers@gmail.com


Signed-off-by: H. Peter Anvin <hpa@zytor.com>

parent 3f217230

arch/x86/kernel/process_64.c

+3 −0

Original line number	Diff line number	Diff line
		@@ -540,6 +540,9 @@ void set_personality_ia32(bool x32)
		clear_thread_flag(TIF_IA32);
		set_thread_flag(TIF_X32);
		current->personality &= ~READ_IMPLIES_EXEC;
		/* is_compat_task() uses the presence of the x32
		syscall bit flag to determine compat status */
		current_thread_info()->status &= ~TS_COMPAT;
		} else {
		set_thread_flag(TIF_IA32);
		clear_thread_flag(TIF_X32);

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