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| author | Himadri Pandya <himadrispandya@gmail.com> | 2020-08-27 12:23:55 +0530 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-09-12 11:45:32 +0200 |
| commit | 3a5455cd886649e3bd39b0fbf93b0cd0e45d05cb (patch) | |
| tree | 10748e013d75e13e2d1b94b5858e2205d1bb5644 | |
| parent | abe3fa074dc48a4da6d1b030a16e521221e3bb54 (diff) | |
| download | linux-stable-3a5455cd886649e3bd39b0fbf93b0cd0e45d05cb.tar.gz linux-stable-3a5455cd886649e3bd39b0fbf93b0cd0e45d05cb.tar.bz2 linux-stable-3a5455cd886649e3bd39b0fbf93b0cd0e45d05cb.zip | |
net: usb: Fix uninit-was-stored issue in asix_read_phy_addr()
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@syzkaller.appspotmail.com
Signed-off-by: Himadri Pandya <himadrispandya@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/net/usb/asix_common.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/net/usb/asix_common.c b/drivers/net/usb/asix_common.c index 2092ef6431f2..712765976a22 100644 --- a/drivers/net/usb/asix_common.c +++ b/drivers/net/usb/asix_common.c @@ -251,7 +251,7 @@ int asix_read_phy_addr(struct usbnet *dev, int internal) 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; } |