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Date: Sat, 25 Feb 2012 21:50:35 -0800 From: tip-bot for Bobby Powers <bobbypowers@...il.com> To: linux-tip-commits@...r.kernel.org Cc: linux-kernel@...r.kernel.org, bobbypowers@...il.com, hpa@...or.com, mingo@...hat.com, tglx@...utronix.de Subject: [tip:x86/x32] x32: Make sure TS_COMPAT is cleared for x32 tasks Commit-ID: ce5f7a99df87918b5be4618a9386213a8e9a7146 Gitweb: http://git.kernel.org/tip/ce5f7a99df87918b5be4618a9386213a8e9a7146 Author: Bobby Powers <bobbypowers@...il.com> AuthorDate: Sat, 25 Feb 2012 23:25:38 -0500 Committer: H. Peter Anvin <hpa@...or.com> CommitDate: Sat, 25 Feb 2012 20:42:18 -0800 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@...il.com> Link: http://lkml.kernel.org/r/1330230338-25077-1-git-send-email-bobbypowers@gmail.com Signed-off-by: H. Peter Anvin <hpa@...or.com> --- arch/x86/kernel/process_64.c | 3 +++ 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); -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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