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| author | Christian Engelmayer <cengelma@gmx.at> | 2014-01-29 01:22:27 +0400 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2014-02-05 23:39:30 +0400 |
| commit | 7f196caffbf2dc96cc145bf5d2ef5ef8a7b4f687 (patch) | |
| tree | 0454a2c0cadfac3273ee0f7b450500755417ef51 /drivers/usb/core/driver.c | |
| parent | 76f24e3f39a1a94bab0d54e98899d64abcd9f69c (diff) | |
| download | linux-7f196caffbf2dc96cc145bf5d2ef5ef8a7b4f687.tar.xz | |
usb: core: Fix potential memory leak adding dyn USBdevice IDs
Fix a memory leak in the usb_store_new_id() error paths. When bailing out
due to sanity checks, the function left the already allocated usb_dynid
struct in place. This regression was introduced by the following commits:
c63fe8f6 (usb: core: add sanity checks when using bInterfaceClass with new_id)
1b9fb31f (usb: core: check for valid id_table when using the RefId feature)
52a6966c (usb: core: bail out if user gives an unknown RefId when using new_id)
Detected by Coverity: CID 1162604.
Signed-off-by: Christian Engelmayer <cengelma@gmx.at>
Acked-by: Wolfram Sang <wsa@the-dreams.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/usb/core/driver.c')
| -rw-r--r-- | drivers/usb/core/driver.c | 24 |
1 files changed, 17 insertions, 7 deletions
diff --git a/drivers/usb/core/driver.c b/drivers/usb/core/driver.c index 5d01558cef66..ab90a0156828 100644 --- a/drivers/usb/core/driver.c +++ b/drivers/usb/core/driver.c @@ -63,8 +63,10 @@ ssize_t usb_store_new_id(struct usb_dynids *dynids, dynid->id.idProduct = idProduct; dynid->id.match_flags = USB_DEVICE_ID_MATCH_DEVICE; if (fields > 2 && bInterfaceClass) { - if (bInterfaceClass > 255) - return -EINVAL; + if (bInterfaceClass > 255) { + retval = -EINVAL; + goto fail; + } dynid->id.bInterfaceClass = (u8)bInterfaceClass; dynid->id.match_flags |= USB_DEVICE_ID_MATCH_INT_CLASS; @@ -73,17 +75,21 @@ ssize_t usb_store_new_id(struct usb_dynids *dynids, if (fields > 4) { const struct usb_device_id *id = id_table; - if (!id) - return -ENODEV; + if (!id) { + retval = -ENODEV; + goto fail; + } for (; id->match_flags; id++) if (id->idVendor == refVendor && id->idProduct == refProduct) break; - if (id->match_flags) + if (id->match_flags) { dynid->id.driver_info = id->driver_info; - else - return -ENODEV; + } else { + retval = -ENODEV; + goto fail; + } } spin_lock(&dynids->lock); @@ -95,6 +101,10 @@ ssize_t usb_store_new_id(struct usb_dynids *dynids, if (retval) return retval; return count; + +fail: + kfree(dynid); + return retval; } EXPORT_SYMBOL_GPL(usb_store_new_id); |