[Linux-kernel-mentees] [PATCH v5] bluetooth: hci_h5: fix memory leak in h5_close

[Marcel Holtmann]

Hi Anant,

> When h5_close() is called, h5 is directly freed when !hu->serdev.
> However, h5->rx_skb is not freed, which causes a memory leak.
> 
> Freeing h5->rx_skb and setting it to NULL, fixes this memory leak.
> 
> Fixes: ce945552fde4 ("Bluetooth: hci_h5: Add support for serdev enumerated devices")
> Reported-by: syzbot+6ce141c55b2f7aafd1c4 at syzkaller.appspotmail.com
> Tested-by: syzbot+6ce141c55b2f7aafd1c4 at syzkaller.appspotmail.com
> Signed-off-by: Anant Thazhemadam <anant.thazhemadam at gmail.com>
> ---
> Changes in v5:
> 	* Set h5->rx_skb = NULL unconditionally - to improve code
> 	  readability
> 	* Update commit message accordingly
> 
> Changes in v4:
> 	* Free h5->rx_skb even when hu->serdev
> 	(Suggested by Hans de Goede <hdegoede at redhat.com>)
> 	* If hu->serdev, then assign h5->rx_skb = NULL
> 
> Changes in v3:
> 	* Free h5->rx_skb when !hu->serdev, and fix the memory leak
> 	* Do not incorrectly and unnecessarily call serdev_device_close()
> 
> Changes in v2:
> 	* Fixed the Fixes tag
> 
> 
> drivers/bluetooth/hci_h5.c | 3 +++
> 1 file changed, 3 insertions(+)

patch has been applied to bluetooth-next tree.

Regards

Marcel