[PATCH] uml: fix a crash under screen

Running UML inside a detached screen delivers SIGWINCH when UML is not
expecting it. This patch ignores them.

Signed-off-by: Jeff Dike <[e-mail]>
Signed-off-by: Andrew Morton <[e-mail]>
Signed-off-by: Linus Torvalds <[e-mail]>

arch/um/kernel/skas/process.c

···
 
                 CATCH_EINTR(n = waitpid(pid, &status, WUNTRACED));
         } while((n >= 0) && WIFSTOPPED(status) &&
-                (WSTOPSIG(status) == SIGVTALRM));
+                ((WSTOPSIG(status) == SIGVTALRM) ||
+		 /* running UML inside a detached screen can cause
+		  * SIGWINCHes
+		  */
+		 (WSTOPSIG(status) == SIGWINCH)));
 
         if((n < 0) || !WIFSTOPPED(status) ||
            (WSTOPSIG(status) != SIGUSR1 && WSTOPSIG(status) != SIGTRAP)){