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Char/Misc fixes for 4.15-rc8

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Here are two bugfixes for some driver bugs for 4.15-rc8
 
 The first is a bluetooth security bug that has been ignored by the
 Bluetooth developers for months for no obvious reason at all, so I've
 taken it through my tree.
 
 The second is a simple double-free bug in the mux subsystem.
 
 Both have been in linux-next for a while with no reported issues.
 
 Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'char-misc-4.15-rc8' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc

Pull char/misc fixes from Greg KH:
 "Here are two bugfixes for some driver bugs for 4.15-rc8

  The first is a bluetooth security bug that has been ignored by the
  Bluetooth developers for months for no obvious reason at all, so I've
  taken it through my tree.

  The second is a simple double-free bug in the mux subsystem.

  Both have been in linux-next for a while with no reported issues"

* tag 'char-misc-4.15-rc8' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc:
  mux: core: fix double get_device()
  Bluetooth: Prevent stack info leak from the EFS element.
This commit is contained in:
Linus Torvalds 2018-01-13 14:01:59 -08:00
commit 9e8f8f1ef4
2 changed files with 14 additions and 10 deletions
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4
drivers/mux/core.c
View File

@ -413,6 +413,7 @@ static int of_dev_node_match(struct device *dev, const void *data)
return dev->of_node == data;
}
/* Note this function returns a reference to the mux_chip dev. */
static struct mux_chip *of_find_mux_chip_by_node(struct device_node *np)
{
struct device *dev;
@ -466,6 +467,7 @@ struct mux_control *mux_control_get(struct device *dev, const char *mux_name)
(!args.args_count && (mux_chip->controllers > 1))) {
dev_err(dev, "%pOF: wrong #mux-control-cells for %pOF\n",
np, args.np);
put_device(&mux_chip->dev);
return ERR_PTR(-EINVAL);
}
@ -476,10 +478,10 @@ struct mux_control *mux_control_get(struct device *dev, const char *mux_name)
if (controller >= mux_chip->controllers) {
dev_err(dev, "%pOF: bad mux controller %u specified in %pOF\n",
np, controller, args.np);
put_device(&mux_chip->dev);
return ERR_PTR(-EINVAL);
}
get_device(&mux_chip->dev);
return &mux_chip->mux[controller];
}
EXPORT_SYMBOL_GPL(mux_control_get);

20
net/bluetooth/l2cap_core.c
View File

@ -3363,9 +3363,10 @@ static int l2cap_parse_conf_req(struct l2cap_chan *chan, void *data, size_t data
break;
case L2CAP_CONF_EFS:
remote_efs = 1;
if (olen == sizeof(efs))
if (olen == sizeof(efs)) {
remote_efs = 1;
memcpy(&efs, (void *) val, olen);
}
break;
case L2CAP_CONF_EWS:
@ -3584,16 +3585,17 @@ static int l2cap_parse_conf_rsp(struct l2cap_chan *chan, void *rsp, int len,
break;
case L2CAP_CONF_EFS:
if (olen == sizeof(efs))
if (olen == sizeof(efs)) {
memcpy(&efs, (void *)val, olen);
if (chan->local_stype != L2CAP_SERV_NOTRAFIC &&
efs.stype != L2CAP_SERV_NOTRAFIC &&
efs.stype != chan->local_stype)
return -ECONNREFUSED;
if (chan->local_stype != L2CAP_SERV_NOTRAFIC &&
efs.stype != L2CAP_SERV_NOTRAFIC &&
efs.stype != chan->local_stype)
return -ECONNREFUSED;
l2cap_add_conf_opt(&ptr, L2CAP_CONF_EFS, sizeof(efs),
(unsigned long) &efs, endptr - ptr);
l2cap_add_conf_opt(&ptr, L2CAP_CONF_EFS, sizeof(efs),
(unsigned long) &efs, endptr - ptr);
}
break;
case L2CAP_CONF_FCS: