This is a note to let you know that I've just added the patch titled net: usb: Fix uninit-was-stored issue in asix_read_phy_addr() to the 4.9-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: net-usb-fix-uninit-was-stored-issue-in-asix_read_phy_addr.patch and it can be found in the queue-4.9 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. >From a092b7233f0e000cc6f2c71a49e2ecc6f917a5fc Mon Sep 17 00:00:00 2001 From: Himadri Pandya <himadrispandya@xxxxxxxxx> Date: Thu, 27 Aug 2020 12:23:55 +0530 Subject: net: usb: Fix uninit-was-stored issue in asix_read_phy_addr() From: Himadri Pandya <himadrispandya@xxxxxxxxx> commit a092b7233f0e000cc6f2c71a49e2ecc6f917a5fc upstream. The buffer size is 2 Bytes and we expect to receive the same amount of data. But sometimes we receive less data and run into uninit-was-stored issue upon read. Hence modify the error check on the return value to match with the buffer size as a prevention. Reported-and-tested by: syzbot+a7e220df5a81d1ab400e@xxxxxxxxxxxxxxxxxxxxxxxxx Signed-off-by: Himadri Pandya <himadrispandya@xxxxxxxxx> Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- drivers/net/usb/asix_common.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/drivers/net/usb/asix_common.c +++ b/drivers/net/usb/asix_common.c @@ -277,7 +277,7 @@ int asix_read_phy_addr(struct usbnet *de netdev_dbg(dev->net, "asix_get_phy_addr()\n"); - if (ret < 0) { + if (ret < 2) { netdev_err(dev->net, "Error reading PHYID register: %02x\n", ret); goto out; } Patches currently in stable-queue which might be from himadrispandya@xxxxxxxxx are queue-4.9/net-usb-fix-uninit-was-stored-issue-in-asix_read_phy_addr.patch