diff options
| author | Arnd Bergmann <arnd@arndb.de> | 2017-08-02 00:04:08 +0000 |
|---|---|---|
| committer | Johannes Weiner <hannes@cmpxchg.org> | 2017-08-02 00:04:08 +0000 |
| commit | 0ed154950d9aac4bea197ab63753517146c531ab (patch) | |
| tree | d9bfedf975b515795212769f0713ed1f067a162b | |
| parent | a9de837f01197ea46302c20319730f632dd6298b (diff) | |
IB/mlx4: fix sprintf format warning
gcc-7 points out that a negative port_num value would overflow
the string buffer:
drivers/infiniband/hw/mlx4/sysfs.c: In function 'mlx4_ib_device_register_sysfs':
drivers/infiniband/hw/mlx4/sysfs.c:251:16: error: 'sprintf' may write a terminating nul past the end of the destination [-Werror=format-overflow=]
drivers/infiniband/hw/mlx4/sysfs.c:251:2: note: 'sprintf' output between 2 and 11 bytes into a destination of size 10
drivers/infiniband/hw/mlx4/sysfs.c:303:17: error: 'sprintf' may write a terminating nul past the end of the destination [-Werror=format-overflow=]
drivers/infiniband/hw/mlx4/sysfs.c:303:3: note: 'sprintf' output between 2 and 11 bytes into a destination of size 10
While we should be able to assume that port_num is positive here,
making the buffer one byte longer has no downsides and avoids the
warning.
Fixes: c1e7e466120b ("IB/mlx4: Add iov directory in sysfs under the ib device")
Link: http://lkml.kernel.org/r/20170714120720.906842-23-arnd@arndb.de
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
| -rw-r--r-- | drivers/infiniband/hw/mlx4/sysfs.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/infiniband/hw/mlx4/sysfs.c b/drivers/infiniband/hw/mlx4/sysfs.c index 0ba5ba7540c8..e219093d2764 100644 --- a/drivers/infiniband/hw/mlx4/sysfs.c +++ b/drivers/infiniband/hw/mlx4/sysfs.c @@ -221,7 +221,7 @@ void del_sysfs_port_mcg_attr(struct mlx4_ib_dev *device, int port_num, static int add_port_entries(struct mlx4_ib_dev *device, int port_num) { int i; - char buff[10]; + char buff[11]; struct mlx4_ib_iov_port *port = NULL; int ret = 0 ; struct ib_port_attr attr; |