timers: Unmap posix timers info mem after restoring them

Signed-off-by: Pavel Emelyanov <xemul@parallels.com>

cr-restore.c

@@ -2094,6 +2094,7 @@ static int sigreturn_restore(pid_t pid, CoreEntry *core)
 	}
 	task_args->timer_n = posix_timers_nr;
 	task_args->posix_timers = posix_timers_info_chunk;
+	task_args->timers_sz = posix_timers_size;
 
 	/*
 	 * Get a reference to shared memory area which is

include/restorer.h

@@ -129,8 +129,9 @@ struct task_restore_core_args {
 
 	struct itimerval		itimers[3];
 
-	int timer_n;
+	int 				timer_n;
 	struct restore_posix_timer 	*posix_timers;
+	unsigned long			timers_sz;
 
 	CredsEntry			creds;
 	uint32_t			cap_inh[CR_CAP_SIZE];

pie/restorer.c

@@ -519,6 +519,9 @@ static void restore_posix_timers(struct task_restore_core_args *args)
 		rt = &args->posix_timers[i];
 		sys_timer_settime((timer_t)rt->spt.it_id, 0, &rt->val, NULL);
 	}
+
+	if (args->timer_n)
+		sys_munmap(args->posix_timers, args->timers_sz);
 }
 
 /*