From a51f4124e6d69afdfae34a2ff2e580e7bf224ad2 Mon Sep 17 00:00:00 2001 From: David Sterba Date: Tue, 4 Mar 2008 14:28:50 -0800 Subject: [PATCH] ipwireless: fix potential tty == NULL dereference The Coverity checker spotted the following inconsequent NULL checking in drivers/char/pcmcia/ipwireless/network.c:ipwireless_network_packet_received() if (tty && channel_idx == IPW_CHANNEL_RAS && (network->ras_control_lines & IPW_CONTROL_LINE_DCD) != 0 && ipwireless_tty_is_modem(tty)) { ... else ipwireless_tty_received(tty, data, length); Cc: Adrian Bunk Signed-off-by: David Sterba Signed-off-by: Jiri Kosina Cc: "John W. Linville" Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- drivers/char/pcmcia/ipwireless/network.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/drivers/char/pcmcia/ipwireless/network.c b/drivers/char/pcmcia/ipwireless/network.c index ff35230058d..d793e68b3e0 100644 --- a/drivers/char/pcmcia/ipwireless/network.c +++ b/drivers/char/pcmcia/ipwireless/network.c @@ -377,13 +377,16 @@ void ipwireless_network_packet_received(struct ipw_network *network, for (i = 0; i < MAX_ASSOCIATED_TTYS; i++) { struct ipw_tty *tty = network->associated_ttys[channel_idx][i]; + if (!tty) + continue; + /* * If it's associated with a tty (other than the RAS channel * when we're online), then send the data to that tty. The RAS * channel's data is handled above - it always goes through * ppp_generic. */ - if (tty && channel_idx == IPW_CHANNEL_RAS + if (channel_idx == IPW_CHANNEL_RAS && (network->ras_control_lines & IPW_CONTROL_LINE_DCD) != 0 && ipwireless_tty_is_modem(tty)) { -- 2.20.1