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authorBobby Powers <bobbypowers@gmail.com>2012-02-26 04:25:38 (GMT)
committerH. Peter Anvin <hpa@zytor.com>2012-02-26 04:42:18 (GMT)
commitce5f7a99df87918b5be4618a9386213a8e9a7146 (patch)
tree38e95ae1b9dae5b4149dd4fa0df42a7abed4e758 /arch/x86/kernel/process_64.c
parent3f21723079d3ff1c0f71790b4f7fbf9546856eb1 (diff)
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>
Diffstat (limited to 'arch/x86/kernel/process_64.c')
-rw-r--r--arch/x86/kernel/process_64.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/arch/x86/kernel/process_64.c b/arch/x86/kernel/process_64.c
index a0701da..32e0412 100644
--- a/arch/x86/kernel/process_64.c
+++ b/arch/x86/kernel/process_64.c
@@ -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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