Commit Message
Greg KH
Oct. 22, 2022, 7:25 a.m. UTC
From: Dan Carpenter <dan.carpenter@oracle.com> [ Upstream commit 7d7f8fe4e399519cc9ac68a475fec6d3a996341b ] The struct_size() macro protects against integer overflows but adding "+ rsc->config_len" introduces the risk of integer overflows again. Use size_add() to be safe. Fixes: c87846571587 ("remoteproc: use struct_size() helper") Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> Reviewed-by: Gustavo A. R. Silva <gustavoars@kernel.org> Reviewed-by: Mukesh Ojha <quic_mojha@quicinc.com> Link: https://lore.kernel.org/r/YyMyoPoGOJUcEpZT@kili Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org> Signed-off-by: Sasha Levin <sashal@kernel.org> --- drivers/remoteproc/remoteproc_core.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/drivers/remoteproc/remoteproc_core.c b/drivers/remoteproc/remoteproc_core.c index 02a04ab34a23..9d86470df79b 100644 --- a/drivers/remoteproc/remoteproc_core.c +++ b/drivers/remoteproc/remoteproc_core.c @@ -518,12 +518,13 @@ static int rproc_handle_vdev(struct rproc *rproc, void *ptr, struct fw_rsc_vdev *rsc = ptr; struct device *dev = &rproc->dev; struct rproc_vdev *rvdev; + size_t rsc_size; int i, ret; char name[16]; /* make sure resource isn't truncated */ - if (struct_size(rsc, vring, rsc->num_of_vrings) + rsc->config_len > - avail) { + rsc_size = struct_size(rsc, vring, rsc->num_of_vrings); + if (size_add(rsc_size, rsc->config_len) > avail) { dev_err(dev, "vdev rsc is truncated\n"); return -EINVAL; }