* [PATCH v1] fpga: dfl: fme: Add NULL check in fme_perf_pmu_register()
@ 2025-04-01 14:39 Henry Martin
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From: Henry Martin @ 2025-04-01 14:39 UTC (permalink / raw)
To: hao.wu, mdf, yilun.xu; +Cc: trix, linux-fpga, linux-kernel, Henry Martin
devm_kasprintf() returns NULL when memory allocation fails. Currently,
fme_perf_pmu_register() does not check for this case, which results in a
NULL pointer dereference.
Add NULL check after devm_kasprintf() to prevent this issue.
Fixes: 724142f8c42a ("fpga: dfl: fme: add performance reporting support")
Signed-off-by: Henry Martin <bsdhenrymartin@gmail.com>
---
drivers/fpga/dfl-fme-perf.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/drivers/fpga/dfl-fme-perf.c b/drivers/fpga/dfl-fme-perf.c
index 7422d2bc6f37..dbacdacf38cd 100644
--- a/drivers/fpga/dfl-fme-perf.c
+++ b/drivers/fpga/dfl-fme-perf.c
@@ -925,7 +925,8 @@ static int fme_perf_pmu_register(struct platform_device *pdev,
PERF_PMU_CAP_NO_EXCLUDE;
name = devm_kasprintf(priv->dev, GFP_KERNEL, "dfl_fme%d", pdev->id);
-
+ if (!name)
+ return -ENOMEM;
ret = perf_pmu_register(pmu, name, -1);
if (ret)
return ret;
--
2.34.1
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