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| author | Xiyu Yang <xiyuyang19@fudan.edu.cn> | 2020-04-15 16:41:20 +0800 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2020-04-18 15:00:22 -0700 |
| commit | 7717cbec172c3554d470023b4020d5781961187e (patch) | |
| tree | 966e93e86a520ad62fd4a92fed4143f28ede70b6 | |
| parent | de058420767df21e2b6b0f3bb36d1616fb962032 (diff) | |
| download | linux-7717cbec172c3554d470023b4020d5781961187e.tar.bz2 | |
wimax/i2400m: Fix potential urb refcnt leak
i2400mu_bus_bm_wait_for_ack() invokes usb_get_urb(), which increases the
refcount of the "notif_urb".
When i2400mu_bus_bm_wait_for_ack() returns, local variable "notif_urb"
becomes invalid, so the refcount should be decreased to keep refcount
balanced.
The issue happens in all paths of i2400mu_bus_bm_wait_for_ack(), which
forget to decrease the refcnt increased by usb_get_urb(), causing a
refcnt leak.
Fix this issue by calling usb_put_urb() before the
i2400mu_bus_bm_wait_for_ack() returns.
Signed-off-by: Xiyu Yang <xiyuyang19@fudan.edu.cn>
Signed-off-by: Xin Tan <tanxin.ctf@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | drivers/net/wimax/i2400m/usb-fw.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/net/wimax/i2400m/usb-fw.c b/drivers/net/wimax/i2400m/usb-fw.c index 529ebca1e9e1..1f7709d24f35 100644 --- a/drivers/net/wimax/i2400m/usb-fw.c +++ b/drivers/net/wimax/i2400m/usb-fw.c @@ -354,6 +354,7 @@ out: usb_autopm_put_interface(i2400mu->usb_iface); d_fnend(8, dev, "(i2400m %p ack %p size %zu) = %ld\n", i2400m, ack, ack_size, (long) result); + usb_put_urb(¬if_urb); return result; error_exceeded: |