Messages in this thread Patch in this message | | | From | Bobby Powers <> | Subject | [PATCH] x32: make sure TS_COMPAT is cleared for x32 tasks | Date | Sat, 25 Feb 2012 23:25:38 -0500 |
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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> --- 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 e9ec8f1..a465973 100644 --- a/arch/x86/kernel/process_64.c +++ b/arch/x86/kernel/process_64.c @@ -539,6 +539,9 @@ 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); -- 1.7.7.6
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