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RDMA/ucma: ucma_context reference leak in error path 

Validating input parameters should be done before getting the cm_id
otherwise it can leak a cm_id reference.

Fixes: 6a21dfc0d0 ("RDMA/ucma: Limit possible option size")
Signed-off-by: Shamir Rabinovitch <shamir.rabinovitch@oracle.com>
Reviewed-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
This commit is contained in:
Shamir Rabinovitch 2018-04-10 10:26:23 -04:00 committed by Jason Gunthorpe
parent 60cc43fc88
commit ef95a90ae6
1 changed files with 3 additions and 3 deletions
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6
drivers/infiniband/core/ucma.c
View File

@ -1316,13 +1316,13 @@ static ssize_t ucma_set_option(struct ucma_file *file, const char __user *inbuf,
if (copy_from_user(&cmd, inbuf, sizeof(cmd))) if (copy_from_user(&cmd, inbuf, sizeof(cmd)))
return -EFAULT; return -EFAULT;
if (unlikely(cmd.optlen > KMALLOC_MAX_SIZE))
return -EINVAL;
ctx = ucma_get_ctx(file, cmd.id); ctx = ucma_get_ctx(file, cmd.id);
if (IS_ERR(ctx)) if (IS_ERR(ctx))
return PTR_ERR(ctx); return PTR_ERR(ctx);
if (unlikely(cmd.optlen > KMALLOC_MAX_SIZE))
return -EINVAL;
optval = memdup_user(u64_to_user_ptr(cmd.optval), optval = memdup_user(u64_to_user_ptr(cmd.optval),
cmd.optlen); cmd.optlen);
if (IS_ERR(optval)) { if (IS_ERR(optval)) {