From: Bobby Powers Date: Sun, 26 Feb 2012 04:25:38 +0000 (-0500) Subject: x32: Make sure TS_COMPAT is cleared for x32 tasks X-Git-Url: http://drtracing.org/?a=commitdiff_plain;h=ce5f7a99df87918b5be4618a9386213a8e9a7146;p=deliverable%2Flinux.git 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 Link: http://lkml.kernel.org/r/1330230338-25077-1-git-send-email-bobbypowers@gmail.com Signed-off-by: H. Peter Anvin --- diff --git a/arch/x86/kernel/process_64.c b/arch/x86/kernel/process_64.c index a0701da2bd18..32e04120b2cd 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);