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net/wan/fsl_ucc_hdlc: fix out of bounds write on array utdm_info

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[ Upstream commit ddf420390526ede3b9ff559ac89f58cb59d9db2f ]

Array utdm_info is declared as an array of MAX_HDLC_NUM (4) elements
however up to UCC_MAX_NUM (8) elements are potentially being written
to it.  Currently we have an array out-of-bounds write error on the
last 4 elements. Fix this by making utdm_info UCC_MAX_NUM elements in
size.

Addresses-Coverity: ("Out-of-bounds write")
Fixes: c19b6d246a ("drivers/net: support hdlc function for QE-UCC")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Colin Ian King 2020-01-14 14:54:48 +00:00 • committed by Greg Kroah-Hartman
commit bb7f182fe5
1 changed files with 1 additions and 1 deletions
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2
drivers/net/wan/fsl_ucc_hdlc.c
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@ -73,7 +73,7 @@ static struct ucc_tdm_info utdm_primary_info = {
},
};
static struct ucc_tdm_info utdm_info[MAX_HDLC_NUM];
static struct ucc_tdm_info utdm_info[UCC_MAX_NUM];
static int uhdlc_init(struct ucc_hdlc_private *priv)
{