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| author | Arnd Bergmann <arnd@arndb.de> | 2017-07-14 15:07:05 +0300 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2017-07-14 19:03:11 +0300 |
| commit | 56c0da495a0b38f8ac0c0c0e3fcc750ea449daea (patch) | |
| tree | 4bf2f6bbe9eeddc040331866231f36e36e3a0ec3 | |
| parent | c7673e4dea9a338e00fa26cdd42d3697e8e22319 (diff) | |
| download | linux-56c0da495a0b38f8ac0c0c0e3fcc750ea449daea.tar.xz | |
liquidio: fix possible eeprom format string overflow
gcc reports that the temporary buffer for computing the
string length may be too small here:
drivers/net/ethernet/cavium/liquidio/lio_ethtool.c: In function 'lio_get_eeprom_len':
/drivers/net/ethernet/cavium/liquidio/lio_ethtool.c:345:21: error: 'sprintf' may write a terminating nul past the end of the destination [-Werror=format-overflow=]
len = sprintf(buf, "boardname:%s serialnum:%s maj:%lld min:%lld\n",
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/net/ethernet/cavium/liquidio/lio_ethtool.c:345:6: note: 'sprintf' output between 35 and 167 bytes into a destination of size 128
len = sprintf(buf, "boardname:%s serialnum:%s maj:%lld min:%lld\n",
This extends it to 192 bytes, which is certainly enough. As far
as I could tell, there are no other constraints that require a specific
maximum size.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | drivers/net/ethernet/cavium/liquidio/lio_ethtool.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/net/ethernet/cavium/liquidio/lio_ethtool.c b/drivers/net/ethernet/cavium/liquidio/lio_ethtool.c index 28ecda3d3404..ebd353bc78ff 100644 --- a/drivers/net/ethernet/cavium/liquidio/lio_ethtool.c +++ b/drivers/net/ethernet/cavium/liquidio/lio_ethtool.c @@ -335,7 +335,7 @@ lio_ethtool_get_channels(struct net_device *dev, static int lio_get_eeprom_len(struct net_device *netdev) { - u8 buf[128]; + u8 buf[192]; struct lio *lio = GET_LIO(netdev); struct octeon_device *oct_dev = lio->oct_dev; struct octeon_board_info *board_info; |