4.9-stable review patch. If anyone has any objections, please let me know.
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From: Chien Tin Tung chien.tin.tung@intel.com
[ 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 --- drivers/infiniband/core/ucma.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/infiniband/core/ucma.c +++ b/drivers/infiniband/core/ucma.c @@ -1296,7 +1296,7 @@ static ssize_t ucma_set_option(struct uc 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,