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authorJohan Hovold <johan@kernel.org>2021-09-17 14:46:18 +0300
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2021-09-27 18:38:49 +0300
commit65c001df517a7bf9be8621b53d43c89f426ce8d6 (patch)
treece020193ec4e3317f2dd055cb4f4f0274bfdef32 /drivers/ipack/devices
parenta89936cce87d60766a75732a9e7e25c51164f47c (diff)
downloadlinux-65c001df517a7bf9be8621b53d43c89f426ce8d6.tar.xz
ipack: ipoctal: fix tty registration race
Make sure to set the tty class-device driver data before registering the tty to avoid having a racing open() dereference a NULL pointer. Fixes: 9c1d784afc6f ("Staging: ipack/devices/ipoctal: Get rid of ipoctal_list.") Cc: stable@vger.kernel.org # 3.7 Acked-by: Samuel Iglesias Gonsalvez <siglesias@igalia.com> Signed-off-by: Johan Hovold <johan@kernel.org> Link: https://lore.kernel.org/r/20210917114622.5412-3-johan@kernel.org Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/ipack/devices')
-rw-r--r--drivers/ipack/devices/ipoctal.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/ipack/devices/ipoctal.c b/drivers/ipack/devices/ipoctal.c
index c62fec75987c..262451343127 100644
--- a/drivers/ipack/devices/ipoctal.c
+++ b/drivers/ipack/devices/ipoctal.c
@@ -392,13 +392,13 @@ static int ipoctal_inst_slot(struct ipoctal *ipoctal, unsigned int bus_nr,
spin_lock_init(&channel->lock);
channel->pointer_read = 0;
channel->pointer_write = 0;
- tty_dev = tty_port_register_device(&channel->tty_port, tty, i, NULL);
+ tty_dev = tty_port_register_device_attr(&channel->tty_port, tty,
+ i, NULL, channel, NULL);
if (IS_ERR(tty_dev)) {
dev_err(&ipoctal->dev->dev, "Failed to register tty device.\n");
tty_port_destroy(&channel->tty_port);
continue;
}
- dev_set_drvdata(tty_dev, channel);
}
/*