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| author | Dan Carpenter <dan.carpenter@oracle.com> | 2018-07-11 15:29:31 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-09-26 08:36:40 +0200 |
| commit | aad783193f92076d6733475cd4d7f6d0d48afc47 (patch) | |
| tree | 9d5dddcfc68c01f100d5c3767ae57b1864a18884 | |
| parent | e8c398a69458d4cea85ee73df2bdb6299d15f5d3 (diff) | |
| download | linux-stable-aad783193f92076d6733475cd4d7f6d0d48afc47.tar.gz linux-stable-aad783193f92076d6733475cd4d7f6d0d48afc47.tar.bz2 linux-stable-aad783193f92076d6733475cd4d7f6d0d48afc47.zip | |
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>
| -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 75b9d4ac8b1e..371f5f66a9d6 100644 --- a/drivers/misc/mei/bus-fixup.c +++ b/drivers/misc/mei/bus-fixup.c @@ -178,7 +178,7 @@ static int mei_nfc_if_version(struct mei_cl *cl, ret = 0; bytes_recv = __mei_cl_recv(cl, (u8 *)reply, if_version_length); - 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; |