linux-kernel - [tip: perf/core] x86/events/amd/iommu: Fix sizeof mismatch

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Message-ID: <160188443750.7002.16043563500088423723.tip-bot2@tip-bot2>
Date:   Mon, 05 Oct 2020 07:53:57 -0000
From:   "tip-bot2 for Colin Ian King" <tip-bot2@...utronix.de>
To:     linux-tip-commits@...r.kernel.org
Cc:     Colin Ian King <colin.king@...onical.com>,
        "Peter Zijlstra (Intel)" <peterz@...radead.org>,
        x86 <x86@...nel.org>, LKML <linux-kernel@...r.kernel.org>
Subject: [tip: perf/core] x86/events/amd/iommu: Fix sizeof mismatch

The following commit has been merged into the perf/core branch of tip:

Commit-ID:     59d5396a4666195f89a67e118e9e627ddd6f53a1
Gitweb:        https://git.kernel.org/tip/59d5396a4666195f89a67e118e9e627ddd6f53a1
Author:        Colin Ian King <colin.king@...onical.com>
AuthorDate:    Thu, 01 Oct 2020 12:39:00 +01:00
Committer:     Peter Zijlstra <peterz@...radead.org>
CommitterDate: Sat, 03 Oct 2020 16:30:56 +02:00

x86/events/amd/iommu: Fix sizeof mismatch

An incorrect sizeof is being used, struct attribute ** is not correct,
it should be struct attribute *. Note that since ** is the same size as
* this is not causing any issues.  Improve this fix by using sizeof(*attrs)
as this allows us to not even reference the type of the pointer.

Addresses-Coverity: ("Sizeof not portable (SIZEOF_MISMATCH)")
Fixes: 51686546304f ("x86/events/amd/iommu: Fix sysfs perf attribute groups")
Signed-off-by: Colin Ian King <colin.king@...onical.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@...radead.org>
Link: https://lkml.kernel.org/r/20201001113900.58889-1-colin.king@canonical.com
---
 arch/x86/events/amd/iommu.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/x86/events/amd/iommu.c b/arch/x86/events/amd/iommu.c
index fb61620..be50ef8 100644
--- a/arch/x86/events/amd/iommu.c
+++ b/arch/x86/events/amd/iommu.c
@@ -379,7 +379,7 @@ static __init int _init_events_attrs(void)
 	while (amd_iommu_v2_event_descs[i].attr.attr.name)
 		i++;
 
-	attrs = kcalloc(i + 1, sizeof(struct attribute **), GFP_KERNEL);
+	attrs = kcalloc(i + 1, sizeof(*attrs), GFP_KERNEL);
 	if (!attrs)
 		return -ENOMEM;