No functional changes, preparation for utrace-ptrace.
tracehook_signal_handler() is the only caller of ptrace_notify() which
doesn't check the task is ptraced, it assumes that only ptrace can set
TIF_SINGLESTEP.
Currently this is true but we are going to change this, check PT_PTRACED.
Signed-off-by: Oleg Nesterov <o...@redhat.com>
---
include/linux/tracehook.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- PU/include/linux/tracehook.h~117_SIGNAL_HANDLER_CK_PTRACE 2009-10-26
00:06:21.000000000 +0100
+++ PU/include/linux/tracehook.h 2009-10-26 00:10:49.000000000 +0100
@@ -401,7 +401,7 @@ static inline void tracehook_signal_hand
{
if (task_utrace_flags(current))
utrace_signal_handler(current, stepping);
- if (stepping)
+ if (stepping && (task_ptrace(current) & PT_PTRACED))
ptrace_notify(SIGTRAP);
}
