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RDMA/ucma: Correct option size check using optlen

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[ Upstream commit 5f3e3b85cc0a5eae1c46d72e47d3de7bf208d9e2 ]

The option size check is using optval instead of optlen
causing the set option call to fail. Use the correct
field, optlen, for size check.

Fixes: 6a21dfc0d0db ("RDMA/ucma: Limit possible option size")
Signed-off-by: Chien Tin Tung <chien.tin.tung@intel.com>
Signed-off-by: Shiraz Saleem <shiraz.saleem@intel.com>
Reviewed-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Chien Tin Tung 2018-03-21 13:09:25 -05:00 committed by Greg Kroah-Hartman
parent 14fd6ba824
commit 2ccbc5048b
1 changed files with 1 additions and 1 deletions
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2
drivers/infiniband/core/ucma.c
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@ -1295,7 +1295,7 @@ static ssize_t ucma_set_option(struct ucma_file *file, const char __user *inbuf,
if (IS_ERR(ctx))
return PTR_ERR(ctx);
if (unlikely(cmd.optval > KMALLOC_MAX_SIZE))
if (unlikely(cmd.optlen > KMALLOC_MAX_SIZE))
return -EINVAL;
optval = memdup_user((void __user *) (unsigned long) cmd.optval,