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| author | Eugeniu Rosca <erosca@de.adit-jv.com> | 2020-02-26 20:50:35 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-03-11 16:14:59 +0300 |
| commit | c23ad063f6fd0a0ab7b2aa1768e2d981e320b830 (patch) | |
| tree | 6dd8bf1f46e26e0ec9cb82974f5225a62814a699 | |
| parent | e02865dbd31188a7fcec76f5f44c84ab872d597d (diff) | |
| download | linux-c23ad063f6fd0a0ab7b2aa1768e2d981e320b830.tar.xz | |
usb: core: hub: do error out if usb_autopm_get_interface() fails
commit 60e3f6e4ac5b0fda43dad01c32e09409ec710045 upstream.
Reviewing a fresh portion of coverity defects in USB core
(specifically CID 1458999), Alan Stern noted below in [1]:
On Tue, Feb 25, 2020 at 02:39:23PM -0500, Alan Stern wrote:
> A revised search finds line 997 in drivers/usb/core/hub.c and lines
> 216, 269 in drivers/usb/core/port.c. (I didn't try looking in any
> other directories.) AFAICT all three of these should check the
> return value, although a error message in the kernel log probably
> isn't needed.
Factor out the usb_remove_device() change into a standalone patch to
allow conflict-free integration on top of the earliest stable branches.
[1] https://lore.kernel.org/lkml/Pine.LNX.4.44L0.2002251419120.1485-100000@iolanthe.rowland.org
Fixes: 253e05724f9230 ("USB: add a "remove hardware" sysfs attribute")
Cc: stable@vger.kernel.org # v2.6.33+
Suggested-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Eugeniu Rosca <erosca@de.adit-jv.com>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Link: https://lore.kernel.org/r/20200226175036.14946-2-erosca@de.adit-jv.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/usb/core/hub.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/drivers/usb/core/hub.c b/drivers/usb/core/hub.c index 510efa0e8d35..8cf2d2a5e266 100644 --- a/drivers/usb/core/hub.c +++ b/drivers/usb/core/hub.c @@ -961,13 +961,17 @@ int usb_remove_device(struct usb_device *udev) { struct usb_hub *hub; struct usb_interface *intf; + int ret; if (!udev->parent) /* Can't remove a root hub */ return -EINVAL; hub = usb_hub_to_struct_hub(udev->parent); intf = to_usb_interface(hub->intfdev); - usb_autopm_get_interface(intf); + ret = usb_autopm_get_interface(intf); + if (ret < 0) + return ret; + set_bit(udev->portnum, hub->removed_bits); hub_port_logical_disconnect(hub, udev->portnum); usb_autopm_put_interface(intf); |