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| author | Vladimir Oltean <vladimir.oltean@nxp.com> | 2021-09-27 14:21:59 +0300 |
|---|---|---|
| committer | Ramon Fried <rfried.dev@gmail.com> | 2021-09-28 18:50:56 +0300 |
| commit | 977b53f0b30e833b3155c247f48014363f9cfcf0 (patch) | |
| tree | aa110dec1554c53089ac5065e4ee43a2f61d3fbd /drivers/qe | |
| parent | fe04172479c344dcdbf566c6d7624d72720fe410 (diff) | |
| download | u-boot-977b53f0b30e833b3155c247f48014363f9cfcf0.tar.xz | |
net: qe: uec: 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/qe')
| -rw-r--r-- | drivers/qe/uec.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/qe/uec.c b/drivers/qe/uec.c index 5da971ddc0..c4bd5c4a14 100644 --- a/drivers/qe/uec.c +++ b/drivers/qe/uec.c @@ -1407,7 +1407,7 @@ int uec_initialize(struct bd_info *bis, struct uec_inf *uec_info) if (!mdiodev) return -ENOMEM; - strncpy(mdiodev->name, dev->name, MDIO_NAME_LEN); + strlcpy(mdiodev->name, dev->name, MDIO_NAME_LEN); mdiodev->read = uec_miiphy_read; mdiodev->write = uec_miiphy_write; |