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RDMA/ucma: Check that user doesn't overflow QP state 

The QP state is limited and declared in enum ib_qp_state,
but ucma user was able to supply any possible (u32) value.

Reported-by: syzbot+0df1ab766f8924b1edba@syzkaller.appspotmail.com
Fixes: 7521663857 ("RDMA/cma: Export rdma cm interface to userspace")
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
This commit is contained in:
Leon Romanovsky 2018-03-07 18:49:16 +02:00 committed by Doug Ledford
parent aa0de36a40
commit a5880b8443
1 changed files with 3 additions and 0 deletions
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3
drivers/infiniband/core/ucma.c
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@ -1149,6 +1149,9 @@ static ssize_t ucma_init_qp_attr(struct ucma_file *file,
if (copy_from_user(&cmd, inbuf, sizeof(cmd))) if (copy_from_user(&cmd, inbuf, sizeof(cmd)))
return -EFAULT; return -EFAULT;
if (cmd.qp_state > IB_QPS_ERR)
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);