patch-2.1.106 linux/arch/m68k/kernel/ptrace.c

• Lines: 34
• Date: Sat Jun 13 13:14:32 1998
• Orig file: v2.1.105/linux/arch/m68k/kernel/ptrace.c
• Orig date: Thu May 7 22:51:46 1998

diff -u --recursive --new-file v2.1.105/linux/arch/m68k/kernel/ptrace.c linux/arch/m68k/kernel/ptrace.c
@@ -347,9 +347,13 @@
 			goto out;
 		child->flags |= PF_PTRACED;
 		if (child->p_pptr != current) {
+			unsigned long flags;
+
+			write_lock_irqsave(&tasklist_lock, flags);
 			REMOVE_LINKS(child);
 			child->p_pptr = current;
 			SET_LINKS(child);
+			write_unlock_irqrestore(&tasklist_lock, flags);
 		}
 		send_sig(SIGSTOP, child, 1);
 		ret = 0;
@@ -491,6 +495,7 @@
 		}
 
 		case PTRACE_DETACH: { /* detach a process that was attached. */
+			unsigned long flags;
 			long tmp;
 
 			ret = -EIO;
@@ -499,9 +504,11 @@
 			child->flags &= ~(PF_PTRACED|PF_TRACESYS);
 			wake_up_process(child);
 			child->exit_code = data;
+			write_lock_irqsave(&tasklist_lock, flags);
 			REMOVE_LINKS(child);
 			child->p_pptr = child->p_opptr;
 			SET_LINKS(child);
+			write_unlock_irqrestore(&tasklist_lock, flags);
 			/* make sure the single step bit is not set. */
 			tmp = get_reg(child, PT_SR) & ~(TRACE_BITS << 16);
 			put_reg(child, PT_SR, tmp);