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| author | Vladimir Oltean <vladimir.oltean@nxp.com> | 2021-09-27 14:21:48 +0300 |
|---|---|---|
| committer | Ramon Fried <rfried.dev@gmail.com> | 2021-09-28 18:50:56 +0300 |
| commit | f848b4804e99bbbeaa46934589d77a2403108e66 (patch) | |
| tree | 79bc83749d471927423bda9b44b7d434804482d3 /drivers/net | |
| parent | 9be5fa4d5766cb18e533ac6754879847d1e7a9ea (diff) | |
| download | u-boot-f848b4804e99bbbeaa46934589d77a2403108e66.tar.xz | |
net: enetc: ensure imdio.name is NULL terminated after MDIO_NAME_LEN truncation
strncpy() simply bails out when copying a source string whose size
exceeds the destination string size, potentially leaving the destination
string unterminated.
One possible way to address is to pass MDIO_NAME_LEN - 1 and a
previously zero-initialized destination string, but this is more
difficult to maintain.
The chosen alternative is to use strlcpy(), which properly limits the
copy len in the (srclen >= size) case to "size - 1", and which is also
more efficient than the strncpy() byte-by-byte implementation by using
memcpy. The destination string returned by strlcpy() is always NULL
terminated.
Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Reviewed-by: Ramon Fried <rfried.dev@gmail.com>
Diffstat (limited to 'drivers/net')
| -rw-r--r-- | drivers/net/fsl_enetc.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/net/fsl_enetc.c b/drivers/net/fsl_enetc.c index f56f9e7a12..915c7c8025 100644 --- a/drivers/net/fsl_enetc.c +++ b/drivers/net/fsl_enetc.c @@ -269,7 +269,7 @@ static void enetc_start_pcs(struct udevice *dev) priv->imdio.read = enetc_mdio_read; priv->imdio.write = enetc_mdio_write; priv->imdio.priv = priv->port_regs + ENETC_PM_IMDIO_BASE; - strncpy(priv->imdio.name, dev->name, MDIO_NAME_LEN); + strlcpy(priv->imdio.name, dev->name, MDIO_NAME_LEN); if (!miiphy_get_dev_by_name(priv->imdio.name)) mdio_register(&priv->imdio); } |