diff options
| author | Fei Shao <fshao@chromium.org> | 2021-10-14 15:03:51 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-11-18 21:16:34 +0300 |
| commit | ac2592454712e075ce58d28086d20aa984b8edb0 (patch) | |
| tree | df349c1cc161554def99aa0c7079c365dd06876a | |
| parent | 62a0a0539da7d94df256735eab025517fcd5ca67 (diff) | |
| download | linux-ac2592454712e075ce58d28086d20aa984b8edb0.tar.xz | |
mailbox: mtk-cmdq: Validate alias_id on probe
[ Upstream commit 5c154b6a51c2d2d7f266b3ef49b7dd1dc8cb5b65 ]
of_alias_get_id() may return -ENODEV which leads to illegal access to
the cmdq->clocks array.
Adding a check over alias_id to prevent the unexpected behavior.
Fixes: 85dfdbfc13ea ("mailbox: cmdq: add multi-gce clocks support for mt8195")
Signed-off-by: Fei Shao <fshao@chromium.org>
Reviewed-by: Tzung-Bi Shih <tzungbi@google.com>
Signed-off-by: Jassi Brar <jaswinder.singh@linaro.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
| -rw-r--r-- | drivers/mailbox/mtk-cmdq-mailbox.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/mailbox/mtk-cmdq-mailbox.c b/drivers/mailbox/mtk-cmdq-mailbox.c index c591dab9d5a4..9b0cc3bb5b23 100644 --- a/drivers/mailbox/mtk-cmdq-mailbox.c +++ b/drivers/mailbox/mtk-cmdq-mailbox.c @@ -572,7 +572,7 @@ static int cmdq_probe(struct platform_device *pdev) char clk_id[8]; alias_id = of_alias_get_id(node, clk_name); - if (alias_id < cmdq->gce_num) { + if (alias_id >= 0 && alias_id < cmdq->gce_num) { snprintf(clk_id, sizeof(clk_id), "%s%d", clk_name, alias_id); cmdq->clocks[alias_id].id = clk_id; cmdq->clocks[alias_id].clk = of_clk_get(node, 0); |