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Message-Id: <20200214161715.18113-152-sashal@kernel.org>
Date: Fri, 14 Feb 2020 11:16:41 -0500
From: Sasha Levin <sashal@...nel.org>
To: linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc: Colin Ian King <colin.king@...onical.com>,
"Rafael J . Wysocki" <rafael.j.wysocki@...el.com>,
Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
Sasha Levin <sashal@...nel.org>
Subject: [PATCH AUTOSEL 4.14 152/186] driver core: platform: fix u32 greater or equal to zero comparison
From: Colin Ian King <colin.king@...onical.com>
[ Upstream commit 0707cfa5c3ef58effb143db9db6d6e20503f9dec ]
Currently the check that a u32 variable i is >= 0 is always true because
the unsigned variable will never be negative, causing the loop to run
forever. Fix this by changing the pre-decrement check to a zero check on
i followed by a decrement of i.
Addresses-Coverity: ("Unsigned compared against 0")
Fixes: 39cc539f90d0 ("driver core: platform: Prevent resouce overflow from causing infinite loops")
Signed-off-by: Colin Ian King <colin.king@...onical.com>
Reviewed-by: Rafael J. Wysocki <rafael.j.wysocki@...el.com>
Link: https://lore.kernel.org/r/20200116175758.88396-1-colin.king@canonical.com
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
drivers/base/platform.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/base/platform.c b/drivers/base/platform.c
index e3d40c41c33b0..bcb6519fe2113 100644
--- a/drivers/base/platform.c
+++ b/drivers/base/platform.c
@@ -428,7 +428,7 @@ int platform_device_add(struct platform_device *pdev)
pdev->id = PLATFORM_DEVID_AUTO;
}
- while (--i >= 0) {
+ while (i--) {
struct resource *r = &pdev->resource[i];
if (r->parent)
release_resource(r);
--
2.20.1
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