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| author | Chuhong Yuan <hslester96@gmail.com> | 2019-10-18 16:15:34 +0800 |
|---|---|---|
| committer | Jason Gunthorpe <jgg@mellanox.com> | 2019-10-22 16:10:03 -0300 |
| commit | a29e1012c1bf52c5364cad5ffbf5b4be8fe9c91b (patch) | |
| tree | abb5edfad7cc76c4cecb512f2485221762f06977 /drivers/infiniband/core/uverbs_ioctl.c | |
| parent | d3bd93967015d974bb95d47cc14edd5adbea814f (diff) | |
| download | linux-a29e1012c1bf52c5364cad5ffbf5b4be8fe9c91b.tar.gz | |
RDMA/uverbs: Add a check for uverbs_attr_get to uverbs_copy_to_struct_or_zero
All current callers for uverbs_copy_to_struct_or_zero() already check that
the attribute exists, but it make sense to verify the result like the
other functions do.
Link: https://lore.kernel.org/r/20191018081533.8544-1-hslester96@gmail.com
Signed-off-by: Chuhong Yuan <hslester96@gmail.com>
Reviewed-by: Jason Gunthorpe <jgg@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
Diffstat (limited to 'drivers/infiniband/core/uverbs_ioctl.c')
| -rw-r--r-- | drivers/infiniband/core/uverbs_ioctl.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/infiniband/core/uverbs_ioctl.c b/drivers/infiniband/core/uverbs_ioctl.c index 61758201d9b2..269938f59d3f 100644 --- a/drivers/infiniband/core/uverbs_ioctl.c +++ b/drivers/infiniband/core/uverbs_ioctl.c @@ -795,6 +795,9 @@ int uverbs_copy_to_struct_or_zero(const struct uverbs_attr_bundle *bundle, { const struct uverbs_attr *attr = uverbs_attr_get(bundle, idx); + if (IS_ERR(attr)) + return PTR_ERR(attr); + if (size < attr->ptr_attr.len) { if (clear_user(u64_to_user_ptr(attr->ptr_attr.data) + size, attr->ptr_attr.len - size)) |