From: Wen Yang <wen.yan...@zte.com.cn>
commit 95566aa75cd6b3b404502c06f66956b5481194b3 upstream.
There is a possible double free issue in ppc4xx_trng_probe():
85: dev->trng_base = of_iomap(trng, 0);
86: of_node_put(trng); ---> released here
87: if (!dev->trng_base)
88: goto err_out;
...
110: ierr_out:
111: of_node_put(trng); ---> double released here
...
This issue was detected by using the Coccinelle software.
We fix it by removing the unnecessary of_node_put().
Fixes: 5343e674f32f ("crypto4xx: integrate ppc4xx-rng into crypto4xx")
Signed-off-by: Wen Yang <wen.yan...@zte.com.cn>
Cc: <sta...@vger.kernel.org>
Cc: "David S. Miller" <da...@davemloft.net>
Cc: Thomas Gleixner <t...@linutronix.de>
Cc: Greg Kroah-Hartman <gre...@linuxfoundation.org>
Cc: Allison Randal <alli...@lohutok.net>
Cc: Armijn Hemel <arm...@tjaldur.nl>
Cc: Julia Lawall <julia.law...@lip6.fr>
Cc: linux-crypto@vger.kernel.org
Cc: linux-ker...@vger.kernel.org
Acked-by: Julia Lawall <julia.law...@lip6.fr>
Signed-off-by: Herbert Xu <herb...@gondor.apana.org.au>
Signed-off-by: Amit Pundir <amit.pun...@linaro.org>
---
Cleanly apply on 4.9.y as well.
drivers/crypto/amcc/crypto4xx_trng.c | 1 -
1 file changed, 1 deletion(-)
diff --git a/drivers/crypto/amcc/crypto4xx_trng.c
b/drivers/crypto/amcc/crypto4xx_trng.c
index 368c5599515e..a194ee0ddbb6 100644
--- a/drivers/crypto/amcc/crypto4xx_trng.c
+++ b/drivers/crypto/amcc/crypto4xx_trng.c
@@ -111,7 +111,6 @@ void ppc4xx_trng_probe(struct crypto4xx_core_device
*core_dev)
return;
err_out:
- of_node_put(trng);
iounmap(dev->trng_base);
kfree(rng);
dev->trng_base = NULL;
--
2.7.4
