From: Alexander Lobakin <alobakin@marvell.com>
Date: Thu, 23 Jul 2020 01:10:34 +0300
Subject: qed: prevent possible double-frees of the chains
Patch-mainline: v5.9-rc1
Git-commit: 96ca4c50c7f711531d4fa238906f8abbbd0ff517
References: jsc#SLE-15143
Zero-initialize chain on qed_chain_free(), so it couldn't be freed
twice and provoke undefined behaviour.
Signed-off-by: Alexander Lobakin <alobakin@marvell.com>
Signed-off-by: Igor Russkikh <irusskikh@marvell.com>
Signed-off-by: Michal Kalderon <michal.kalderon@marvell.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Acked-by: Thomas Bogendoerfer <tbogendoerfer@suse.de>
---
drivers/net/ethernet/qlogic/qed/qed_chain.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
--- a/drivers/net/ethernet/qlogic/qed/qed_chain.c
+++ b/drivers/net/ethernet/qlogic/qed/qed_chain.c
@@ -92,8 +92,10 @@ void qed_chain_free(struct qed_dev *cdev
qed_chain_free_pbl(cdev, chain);
break;
default:
- break;
+ return;
}
+
+ qed_chain_init_mem(chain, NULL, 0);
}
static int