isdn_ppp: Add checks for allocation failure in isdn_ppp_open()

[ Upstream commit 0baa57d8dc32db78369d8b5176ef56c5e2e18ab3 ]

Compile-tested only.

Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/isdn/i4l/isdn_ppp.c b/drivers/isdn/i4l/isdn_ppp.c
index c4198fa490bfac50dd3c05fa324502d4e6f228c8..86f9abebcb72af8b6f88440a500b7737933e77a0 100644 (file)
--- 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;