diff options
| author | Leon Romanovsky <leonro@nvidia.com> | 2024-05-09 10:39:33 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2024-06-12 12:03:31 +0300 |
| commit | 43504dae4d20c41ddced1d1c64d3a9669d94bab7 (patch) | |
| tree | d27ba217a26389e2358dd910f47e7838c8db2b7e /drivers/infiniband | |
| parent | f5f95901a366fec3cf40cabfa93e6d37fcbd6f12 (diff) | |
| download | linux-43504dae4d20c41ddced1d1c64d3a9669d94bab7.tar.xz | |
RDMA/IPoIB: Fix format truncation compilation errors
[ Upstream commit 49ca2b2ef3d003402584c68ae7b3055ba72e750a ]
Truncate the device name to store IPoIB VLAN name.
[leonro@5b4e8fba4ddd kernel]$ make -s -j 20 allmodconfig
[leonro@5b4e8fba4ddd kernel]$ make -s -j 20 W=1 drivers/infiniband/ulp/ipoib/
drivers/infiniband/ulp/ipoib/ipoib_vlan.c: In function ‘ipoib_vlan_add’:
drivers/infiniband/ulp/ipoib/ipoib_vlan.c:187:52: error: ‘%04x’
directive output may be truncated writing 4 bytes into a region of size
between 0 and 15 [-Werror=format-truncation=]
187 | snprintf(intf_name, sizeof(intf_name), "%s.%04x",
| ^~~~
drivers/infiniband/ulp/ipoib/ipoib_vlan.c:187:48: note: directive
argument in the range [0, 65535]
187 | snprintf(intf_name, sizeof(intf_name), "%s.%04x",
| ^~~~~~~~~
drivers/infiniband/ulp/ipoib/ipoib_vlan.c:187:9: note: ‘snprintf’ output
between 6 and 21 bytes into a destination of size 16
187 | snprintf(intf_name, sizeof(intf_name), "%s.%04x",
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
188 | ppriv->dev->name, pkey);
| ~~~~~~~~~~~~~~~~~~~~~~~
cc1: all warnings being treated as errors
make[6]: *** [scripts/Makefile.build:244: drivers/infiniband/ulp/ipoib/ipoib_vlan.o] Error 1
make[6]: *** Waiting for unfinished jobs....
Fixes: 9baa0b036410 ("IB/ipoib: Add rtnl_link_ops support")
Link: https://lore.kernel.org/r/e9d3e1fef69df4c9beaf402cc3ac342bad680791.1715240029.git.leon@kernel.org
Signed-off-by: Leon Romanovsky <leonro@nvidia.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'drivers/infiniband')
| -rw-r--r-- | drivers/infiniband/ulp/ipoib/ipoib_vlan.c | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/drivers/infiniband/ulp/ipoib/ipoib_vlan.c b/drivers/infiniband/ulp/ipoib/ipoib_vlan.c index 4bd161e86f8d..562df2b3ef18 100644 --- a/drivers/infiniband/ulp/ipoib/ipoib_vlan.c +++ b/drivers/infiniband/ulp/ipoib/ipoib_vlan.c @@ -184,8 +184,12 @@ int ipoib_vlan_add(struct net_device *pdev, unsigned short pkey) ppriv = ipoib_priv(pdev); - snprintf(intf_name, sizeof(intf_name), "%s.%04x", - ppriv->dev->name, pkey); + /* If you increase IFNAMSIZ, update snprintf below + * to allow longer names. + */ + BUILD_BUG_ON(IFNAMSIZ != 16); + snprintf(intf_name, sizeof(intf_name), "%.10s.%04x", ppriv->dev->name, + pkey); ndev = ipoib_intf_alloc(ppriv->ca, ppriv->port, intf_name); if (IS_ERR(ndev)) { |