Thread (3 messages) 3 messages, 3 authors, 16d ago

Re: [PATCH] powerpc/warp: Fix error handling in pika_dtm_thread

From: Christophe Leroy <hidden>
Date: 2025-11-19 15:50:34
Also in: lkml, stable


Le 16/11/2025 à 03:44, Ma Ke a écrit :
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pika_dtm_thread() acquires client through of_find_i2c_device_by_node()
but fails to release it in error handling path. This could result in a
reference count leak, preventing proper cleanup and potentially
leading to resource exhaustion. Add put_device() to release the
reference in the error handling path.
It is not really an error path, it is the termination of the kthread.
Found by code review.

Cc: stable@vger.kernel.org
Fixes: 3984114f0562 ("powerpc/warp: Platform fix for i2c change")
Signed-off-by: Ma Ke <redacted>
Reviewed-by: Christophe Leroy <redacted>
quoted hunk ↗ jump to hunk
---
  arch/powerpc/platforms/44x/warp.c | 2 ++
  1 file changed, 2 insertions(+)
diff --git a/arch/powerpc/platforms/44x/warp.c b/arch/powerpc/platforms/44x/warp.c
index a5001d32f978..6f674f86dc85 100644
--- a/arch/powerpc/platforms/44x/warp.c
+++ b/arch/powerpc/platforms/44x/warp.c
@@ -293,6 +293,8 @@ static int pika_dtm_thread(void __iomem *fpga)
                 schedule_timeout(HZ);
         }

+       put_device(&client->dev);
+
         return 0;
  }

--
2.17.1
  
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