diff options
| author | David Sterba <dsterba@suse.cz> | 2008-03-04 14:28:50 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2008-03-04 16:35:13 -0800 |
| commit | a51f4124e6d69afdfae34a2ff2e580e7bf224ad2 (patch) | |
| tree | 5db5968bdd88e7db69847604e1efbd46f8dda14f /drivers/char | |
| parent | 3149be50d3a31df095bcc83d752293da65a37f62 (diff) | |
| download | op-kernel-dev-a51f4124e6d69afdfae34a2ff2e580e7bf224ad2.zip op-kernel-dev-a51f4124e6d69afdfae34a2ff2e580e7bf224ad2.tar.gz | |
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 <bunk@kernel.org>
Signed-off-by: David Sterba <dsterba@suse.cz>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
Cc: "John W. Linville" <linville@tuxdriver.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/char')
| -rw-r--r-- | drivers/char/pcmcia/ipwireless/network.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/drivers/char/pcmcia/ipwireless/network.c b/drivers/char/pcmcia/ipwireless/network.c index ff35230..d793e68b 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)) { |
