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Commit b063d53d authored by Leon Romanovsky's avatar Leon Romanovsky Committed by Greg Kroah-Hartman
Browse files

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



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: default avatar <syzbot+0df1ab766f8924b1edba@syzkaller.appspotmail.com>
Fixes: 75216638 ("RDMA/cma: Export rdma cm interface to userspace")
Signed-off-by: default avatarLeon Romanovsky <leonro@mellanox.com>
Signed-off-by: default avatarDoug Ledford <dledford@redhat.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent e126e3ea

drivers/infiniband/core/ucma.c

+3 −0
Original line number Diff line number Diff line
@@ -1139,6 +1139,9 @@ static ssize_t ucma_init_qp_attr(struct ucma_file *file, 
	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);