4.4-stable review patch. If anyone has any objections, please let me know.
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From: Leon Romanovsky leonro@mellanox.com
commit a5880b84430316e3e1c1f5d23aa32ec6000cc717 upstream.
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: 75216638572f ("RDMA/cma: Export rdma cm interface to userspace") Signed-off-by: Leon Romanovsky leonro@mellanox.com Signed-off-by: Doug Ledford dledford@redhat.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
--- drivers/infiniband/core/ucma.c | 3 +++ 1 file changed, 3 insertions(+)
--- a/drivers/infiniband/core/ucma.c +++ b/drivers/infiniband/core/ucma.c @@ -1138,6 +1138,9 @@ static ssize_t ucma_init_qp_attr(struct if (copy_from_user(&cmd, inbuf, sizeof(cmd))) return -EFAULT;
+ if (cmd.qp_state > IB_QPS_ERR) + return -EINVAL; + ctx = ucma_get_ctx(file, cmd.id); if (IS_ERR(ctx)) return PTR_ERR(ctx);