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| author | Dan Carpenter <dan.carpenter@oracle.com> | 2022-09-15 17:11:44 +0300 |
|---|---|---|
| committer | Mathieu Poirier <mathieu.poirier@linaro.org> | 2022-09-19 15:32:27 -0600 |
| commit | 7d7f8fe4e399519cc9ac68a475fec6d3a996341b (patch) | |
| tree | 8ee0dc8a957bd0234048d8eb8bf047d0c5027c4f /drivers/remoteproc | |
| parent | fa25b944174a6a25a14a2bb1c52cf74d5ad95140 (diff) | |
| download | linux-7d7f8fe4e399519cc9ac68a475fec6d3a996341b.tar.gz | |
remoteproc: Harden rproc_handle_vdev() against integer overflow
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>
Diffstat (limited to 'drivers/remoteproc')
| -rw-r--r-- | drivers/remoteproc/remoteproc_core.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/drivers/remoteproc/remoteproc_core.c b/drivers/remoteproc/remoteproc_core.c index 6e8849f0df18a..f5ba3b305aaff 100644 --- a/drivers/remoteproc/remoteproc_core.c +++ b/drivers/remoteproc/remoteproc_core.c @@ -520,12 +520,13 @@ 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; } |