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Commit f3c04b93 authored by Tejun Heo's avatar Tejun Heo Committed by Oleg Nesterov
Browse files

ptrace: move SIGTRAP on exec(2) logic to ptrace_event() 



Move SIGTRAP on exec(2) logic from tracehook_report_exec() to
ptrace_event().  This is part of changes to make ptrace_event()
smarter and handle ptrace event related details in one place.

This doesn't introduce any behavior change.

Signed-off-by: default avatarTejun Heo <tj@kernel.org>
Signed-off-by: default avatarOleg Nesterov <oleg@redhat.com>
parent 643ad838

include/linux/ptrace.h

+8 −8
Original line number Diff line number Diff line
@@ -172,17 +172,17 @@ static inline bool ptrace_event_enabled(struct task_struct *task, int event) 
 * Check whether @event is enabled and, if so, report @event and @message

 * to the ptrace parent.

 *

 * Returns nonzero if we did a ptrace notification, zero if not.

 *

 * Called without locks.

 */

static inline int ptrace_event(int event, unsigned long message)

static inline void ptrace_event(int event, unsigned long message)

{

	if (likely(!ptrace_event_enabled(current, event)))

		return false;

	if (unlikely(ptrace_event_enabled(current, event))) {

		current->ptrace_message = message;

		ptrace_notify((event << 8) | SIGTRAP);

	return true;

	} else if (event == PTRACE_EVENT_EXEC && unlikely(current->ptrace)) {

		/* legacy EXEC report via SIGTRAP */

		send_sig(SIGTRAP, current, 0);

	}

}



/**

include/linux/tracehook.h

+1 −3
Original line number Diff line number Diff line
@@ -201,9 +201,7 @@ static inline void tracehook_report_exec(struct linux_binfmt *fmt, 
					 struct linux_binprm *bprm,

					 struct pt_regs *regs)

{

	if (!ptrace_event(PTRACE_EVENT_EXEC, 0) &&

	    unlikely(current->ptrace & PT_PTRACED))

		send_sig(SIGTRAP, current, 0);

	ptrace_event(PTRACE_EVENT_EXEC, 0);

}



/**