[PATCH] ptrace_notify() locking

Spotted by Dawson Engler. recalc_signpending() needs tsk->sighand->siglock.

[PATCH] ptrace_notify() locking
Spotted by Dawson Engler. recalc_signpending() needs tsk->sighand->siglock.
db51569e · Andrew Morton · David S. Miller · e32d96dc · db51569e
Commit db51569e authored Mar 22, 2003 by Andrew Morton Committed by David S. Miller Mar 22, 2003
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kernel/ptrace.c kernel/ptrace.c +3 -0

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--- a/kernel/ptrace.c
+++ b/kernel/ptrace.c
@@ -336,5 +336,8 @@ void ptrace_notify(int exit_code)
 	/*
 	 * Signals sent while we were stopped might set TIF_SIGPENDING.
 	 */
+
+	spin_lock_irq(&current->sighand->siglock);
 	recalc_sigpending();
+	spin_unlock_irq(&current->sighand->siglock);
 }