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Message-ID: <160862476339.414.17626678568765447822.tip-bot2@tip-bot2>
Date: Tue, 22 Dec 2020 08:12:43 -0000
From: "irqchip-bot for John Garry" <tip-bot2@...utronix.de>
To: linux-kernel@...r.kernel.org
Cc: Dan Carpenter <dan.carpenter@...cle.com>,
John Garry <john.garry@...wei.com>,
Marc Zyngier <maz@...nel.org>, tglx@...utronix.de
Subject: [irqchip: irq/irqchip-next] driver core: platform: Add extra error
check in devm_platform_get_irqs_affinity()
The following commit has been merged into the irq/irqchip-next branch of irqchip:
Commit-ID: e1dc20995cb9fa04b46e8f37113a7203c906d2bf
Gitweb: https://git.kernel.org/pub/scm/linux/kernel/git/maz/arm-platforms/e1dc20995cb9fa04b46e8f37113a7203c906d2bf
Author: John Garry <john.garry@...wei.com>
AuthorDate: Mon, 21 Dec 2020 22:30:55 +08:00
Committer: Marc Zyngier <maz@...nel.org>
CommitterDate: Tue, 22 Dec 2020 08:06:38
driver core: platform: Add extra error check in devm_platform_get_irqs_affinity()
The current check of nvec < minvec for nvec returned from
platform_irq_count() will not detect a negative error code in nvec.
This is because minvec is unsigned, and, as such, nvec is promoted to
unsigned in that check, which will make it a huge number (if it contained
-EPROBE_DEFER).
In practice, an error should not occur in nvec for the only in-tree
user, but add a check anyway.
Fixes: e15f2fa959f2 ("driver core: platform: Add devm_platform_get_irqs_affinity()")
Reported-by: Dan Carpenter <dan.carpenter@...cle.com>
Signed-off-by: John Garry <john.garry@...wei.com>
Signed-off-by: Marc Zyngier <maz@...nel.org>
Link: https://lore.kernel.org/r/1608561055-231244-1-git-send-email-john.garry@huawei.com
---
drivers/base/platform.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/drivers/base/platform.c b/drivers/base/platform.c
index ea8add1..74c97b6 100644
--- a/drivers/base/platform.c
+++ b/drivers/base/platform.c
@@ -351,6 +351,8 @@ int devm_platform_get_irqs_affinity(struct platform_device *dev,
return -ERANGE;
nvec = platform_irq_count(dev);
+ if (nvec < 0)
+ return nvec;
if (nvec < minvec)
return -ENOSPC;
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