| From | Greg Kroah-Hartman <> | Subject | [PATCH 4.14 307/315] reset: bail if try_module_get() fails | Date | Mon, 19 Jul 2021 16:53:16 +0200 |
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From: Philipp Zabel <p.zabel@pengutronix.de>
[ Upstream commit 4fb26fb83f0def3d39c14e268bcd4003aae8fade ]
Abort instead of returning a new reset control for a reset controller device that is going to have its module unloaded.
Reported-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> Fixes: 61fc41317666 ("reset: Add reset controller API") Acked-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> Link: https://lore.kernel.org/r/20210607082615.15160-1-p.zabel@pengutronix.de Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de> Signed-off-by: Sasha Levin <sashal@kernel.org> --- drivers/reset/core.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/drivers/reset/core.c b/drivers/reset/core.c index 7e0a14211c88..d941fb4050bb 100644 --- a/drivers/reset/core.c +++ b/drivers/reset/core.c @@ -398,7 +398,10 @@ static struct reset_control *__reset_control_get_internal( if (!rstc) return ERR_PTR(-ENOMEM); - try_module_get(rcdev->owner); + if (!try_module_get(rcdev->owner)) { + kfree(rstc); + return ERR_PTR(-ENODEV); + } rstc->rcdev = rcdev; list_add(&rstc->list, &rcdev->reset_control_head); -- 2.30.2
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