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RDMA/ucma: Correct option size check using optlen 

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: 6a21dfc0d0 ("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>
This commit is contained in:
Chien Tin Tung 2018-03-21 13:09:25 -05:00 committed by Jason Gunthorpe
parent 103140eccb
commit 5f3e3b85cc
1 changed files with 1 additions and 1 deletions
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2
drivers/infiniband/core/ucma.c
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@ -1307,7 +1307,7 @@ static ssize_t ucma_set_option(struct ucma_file *file, const char __user *inbuf,
if (IS_ERR(ctx)) if (IS_ERR(ctx))
return PTR_ERR(ctx); return PTR_ERR(ctx);
if (unlikely(cmd.optval > KMALLOC_MAX_SIZE)) if (unlikely(cmd.optlen > KMALLOC_MAX_SIZE))
return -EINVAL; return -EINVAL;
optval = memdup_user((void __user *) (unsigned long) cmd.optval, optval = memdup_user((void __user *) (unsigned long) cmd.optval,