isdn_ppp: Add checks for allocation failure in isdn_ppp_open()

Compile-tested only. Signed-off-by: Ben Hutchings <[email protected]> Signed-off-by: David S. Miller <[email protected]>
torvalds · Nov 2, 2015 · 0baa57d · 0baa57d
1 parent 7091079
commit 0baa57d
Showing 1 changed file with 6 additions and 0 deletions.
diff --git a/drivers/isdn/i4l/isdn_ppp.c b/drivers/isdn/i4l/isdn_ppp.c
@@ -301,6 +301,8 @@ isdn_ppp_open(int min, struct file *file)
 	is->compflags = 0;
 
 	is->reset = isdn_ppp_ccp_reset_alloc(is);
+	if (!is->reset)
+		return -ENOMEM;
 
 	is->lp = NULL;
 	is->mp_seqno = 0;       /* MP sequence number */
@@ -320,6 +322,10 @@ isdn_ppp_open(int min, struct file *file)
 	 * VJ header compression init
 	 */
 	is->slcomp = slhc_init(16, 16);	/* not necessary for 2. link in bundle */
+	if (!is->slcomp) {
+		isdn_ppp_ccp_reset_free(is);
+		return -ENOMEM;
+	}
 #endif
 #ifdef CONFIG_IPPP_FILTER
 	is->pass_filter = NULL;