From: Li Ming <ming.li@zohomail.com>
To: dave@stgolabs.net, jonathan.cameron@huawei.com,
dave.jiang@intel.com, alison.schofield@intel.com,
vishal.l.verma@intel.com, ira.weiny@intel.com,
dan.j.williams@intel.com
Cc: linux-cxl@vger.kernel.org, linux-kernel@vger.kernel.org,
Li Ming <ming.li@zohomail.com>
Subject: [PATCH 1/1] cxl/hdm: Fix potential infinite loop in __cxl_dpa_reserve()
Date: Mon, 12 Jan 2026 20:05:26 +0800 [thread overview]
Message-ID: <20260112120526.530232-1-ming.li@zohomail.com> (raw)
In __cxl_dpa_reserve(), it will check if the new resource range is
included in one of paritions of the cxl memory device.
cxlds->nr_paritions is used to represent how many partitions information
the cxl memory device has. In the loop, if driver cannot find a
partition including the new resource range, it will be an infinite loop.
Fixes: be5cbd084027 ("cxl: Kill enum cxl_decoder_mode")
Signed-off-by: Li Ming <ming.li@zohomail.com>
---
drivers/cxl/core/hdm.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/cxl/core/hdm.c b/drivers/cxl/core/hdm.c
index 1c5d2022c87a..a470099a69f1 100644
--- a/drivers/cxl/core/hdm.c
+++ b/drivers/cxl/core/hdm.c
@@ -403,7 +403,7 @@ static int __cxl_dpa_reserve(struct cxl_endpoint_decoder *cxled,
* is not set.
*/
if (cxled->part < 0)
- for (int i = 0; cxlds->nr_partitions; i++)
+ for (int i = 0; i < cxlds->nr_partitions; i++)
if (resource_contains(&cxlds->part[i].res, res)) {
cxled->part = i;
break;
--
2.34.1
next reply other threads:[~2026-01-12 12:05 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-01-12 12:05 Li Ming [this message]
2026-01-12 15:35 ` Dave Jiang
2026-01-12 15:55 ` Ira Weiny
2026-01-12 16:03 ` Dave Jiang
2026-01-12 18:02 ` [PATCH] " Markus Elfring
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