diff options
| author | Dan Carpenter <dan.carpenter@oracle.com> | 2018-07-11 15:29:31 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-09-26 08:38:14 +0200 |
| commit | 29068d29718f0bdef2cb98e587e717496e81cbcc (patch) | |
| tree | 3a872aa864aa69857307b9a952dd01494e4cf7af /drivers/misc | |
| parent | 0eb82af7cd718652ed9e18c00352bed33c270ace (diff) | |
mei: bus: type promotion bug in mei_nfc_if_version()
commit b40b3e9358fbafff6a4ba0f4b9658f6617146f9c upstream.
We accidentally removed the check for negative returns
without considering the issue of type promotion.
The "if_version_length" variable is type size_t so if __mei_cl_recv()
returns a negative then "bytes_recv" is type promoted
to a high positive value and treated as success.
Cc: <stable@vger.kernel.org>
Fixes: 582ab27a063a ("mei: bus: fix received data size check in NFC fixup")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/misc')
| -rw-r--r-- | drivers/misc/mei/bus-fixup.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/misc/mei/bus-fixup.c b/drivers/misc/mei/bus-fixup.c index 0208c4b027c5..fa0236a5e59a 100644 --- a/drivers/misc/mei/bus-fixup.c +++ b/drivers/misc/mei/bus-fixup.c @@ -267,7 +267,7 @@ static int mei_nfc_if_version(struct mei_cl *cl, ret = 0; bytes_recv = __mei_cl_recv(cl, (u8 *)reply, if_version_length, 0); - if (bytes_recv < if_version_length) { + if (bytes_recv < 0 || bytes_recv < if_version_length) { dev_err(bus->dev, "Could not read IF version\n"); ret = -EIO; goto err; |