From: Tuan Phan <tuanphan@os.amperecomputing.com> To: unlisted-recipients:; (no To-header on input) Cc: Will Deacon <will@kernel.org>, Mark Rutland <mark.rutland@arm.com>, Robin Murphy <robin.murphy@arm.com>, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org Subject: [PATCH] perf/arm-cmn: Fix invalid pointer when access dtc object sharing the same IRQ number Date: Thu, 17 Jun 2021 09:08:49 -0700 [thread overview] Message-ID: <1623946129-3290-1-git-send-email-tuanphan@os.amperecomputing.com> (raw) When multiple dtcs share the same IRQ number, the irq_friend which used to refer to dtc object gets calculated incorrect which leads to invalid pointer. Fixes: 0ba64770a2f2 ("perf: Add Arm CMN-600 PMU driver") Signed-off-by: Tuan Phan <tuanphan@os.amperecomputing.com> --- drivers/perf/arm-cmn.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/perf/arm-cmn.c b/drivers/perf/arm-cmn.c index 56a5c35..49016f2 100644 --- a/drivers/perf/arm-cmn.c +++ b/drivers/perf/arm-cmn.c @@ -1212,7 +1212,7 @@ static int arm_cmn_init_irqs(struct arm_cmn *cmn) irq = cmn->dtc[i].irq; for (j = i; j--; ) { if (cmn->dtc[j].irq == irq) { - cmn->dtc[j].irq_friend = j - i; + cmn->dtc[j].irq_friend = i - j; goto next; } } -- 2.7.4
WARNING: multiple messages have this Message-ID (diff)
From: Tuan Phan <tuanphan@os.amperecomputing.com> Cc: Will Deacon <will@kernel.org>, Mark Rutland <mark.rutland@arm.com>, Robin Murphy <robin.murphy@arm.com>, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org Subject: [PATCH] perf/arm-cmn: Fix invalid pointer when access dtc object sharing the same IRQ number Date: Thu, 17 Jun 2021 09:08:49 -0700 [thread overview] Message-ID: <1623946129-3290-1-git-send-email-tuanphan@os.amperecomputing.com> (raw) When multiple dtcs share the same IRQ number, the irq_friend which used to refer to dtc object gets calculated incorrect which leads to invalid pointer. Fixes: 0ba64770a2f2 ("perf: Add Arm CMN-600 PMU driver") Signed-off-by: Tuan Phan <tuanphan@os.amperecomputing.com> --- drivers/perf/arm-cmn.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/perf/arm-cmn.c b/drivers/perf/arm-cmn.c index 56a5c35..49016f2 100644 --- a/drivers/perf/arm-cmn.c +++ b/drivers/perf/arm-cmn.c @@ -1212,7 +1212,7 @@ static int arm_cmn_init_irqs(struct arm_cmn *cmn) irq = cmn->dtc[i].irq; for (j = i; j--; ) { if (cmn->dtc[j].irq == irq) { - cmn->dtc[j].irq_friend = j - i; + cmn->dtc[j].irq_friend = i - j; goto next; } } -- 2.7.4 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
next reply other threads:[~2021-06-17 16:13 UTC|newest] Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top 2021-06-17 16:08 Tuan Phan [this message] 2021-06-17 16:08 ` [PATCH] perf/arm-cmn: Fix invalid pointer when access dtc object sharing the same IRQ number Tuan Phan 2021-06-17 17:48 ` Robin Murphy 2021-06-17 17:48 ` Robin Murphy 2021-06-17 22:38 ` Will Deacon 2021-06-17 22:38 ` Will Deacon
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