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| author | Vladimir Oltean <vladimir.oltean@nxp.com> | 2021-09-27 14:21:56 +0300 |
|---|---|---|
| committer | Ramon Fried <rfried.dev@gmail.com> | 2021-09-28 18:50:56 +0300 |
| commit | 7616240b4dd6b8322b79327f45150e0cc0bf6a79 (patch) | |
| tree | 1b5cbbf561bb0d93217197441b9c263ee6544b8a /drivers | |
| parent | 77003e532c387f8e3c414eae1d1d882ccdf4cc06 (diff) | |
| download | u-boot-7616240b4dd6b8322b79327f45150e0cc0bf6a79.tar.gz | |
net: sh_eth: ensure mdiodev->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')
| -rw-r--r-- | drivers/net/sh_eth.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/net/sh_eth.c b/drivers/net/sh_eth.c index 3143a5813a6..4055f07b2fe 100644 --- a/drivers/net/sh_eth.c +++ b/drivers/net/sh_eth.c @@ -657,7 +657,7 @@ int sh_eth_initialize(struct bd_info *bd) mdiodev = mdio_alloc(); if (!mdiodev) return -ENOMEM; - strncpy(mdiodev->name, dev->name, MDIO_NAME_LEN); + strlcpy(mdiodev->name, dev->name, MDIO_NAME_LEN); mdiodev->read = bb_miiphy_read; mdiodev->write = bb_miiphy_write; |