tty: ipwireless: fix possible NULL dereference
The function alloc_ctrl_packet() can fail and return NULL. Incase it
fails print an error message and exit.
Signed-off-by: Sudip Mukherjee <sudip.mukherjee@codethink.co.uk>
Reviewed-by: Jiri Kosina <jkosina@suse.cz>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
diff --git a/drivers/tty/ipwireless/hardware.c b/drivers/tty/ipwireless/hardware.c
index ad7031a..df0204b 100644
--- a/drivers/tty/ipwireless/hardware.c
+++ b/drivers/tty/ipwireless/hardware.c
@@ -1572,6 +1572,11 @@
sizeof(struct ipw_setup_reboot_msg_ack),
ADDR_SETUP_PROT, TL_PROTOCOLID_SETUP,
TL_SETUP_SIGNO_REBOOT_MSG_ACK);
+ if (!packet) {
+ pr_err(IPWIRELESS_PCCARD_NAME
+ ": Not enough memory to send reboot packet");
+ break;
+ }
packet->header.length =
sizeof(struct TlSetupRebootMsgAck);
send_packet(hw, PRIO_SETUP, &packet->header);