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Message-Id: <20231206064531.6089-1-dinghao.liu@zju.edu.cn>
Date: Wed, 6 Dec 2023 14:45:31 +0800
From: Dinghao Liu <dinghao.liu@....edu.cn>
To: dinghao.liu@....edu.cn
Cc: Ariel Elior <aelior@...vell.com>,
Manish Chopra <manishc@...vell.com>,
"David S. Miller" <davem@...emloft.net>,
Eric Dumazet <edumazet@...gle.com>,
Jakub Kicinski <kuba@...nel.org>,
Paolo Abeni <pabeni@...hat.com>,
Yuval Mintz <Yuval.Mintz@...gic.com>,
netdev@...r.kernel.org,
linux-kernel@...r.kernel.org
Subject: [PATCH] qed: Fix a potential double-free in qed_cxt_tables_alloc
qed_ilt_shadow_alloc() will call qed_ilt_shadow_free() to
free p_hwfn->p_cxt_mngr->ilt_shadow on error. However,
qed_cxt_tables_alloc() frees this pointer again on failure
of qed_ilt_shadow_alloc() through calling qed_cxt_mngr_free(),
which may lead to double-free. Fix this issue by setting
p_hwfn->p_cxt_mngr->ilt_shadow to NULL in qed_ilt_shadow_free().
Fixes: fe56b9e6a8d9 ("qed: Add module with basic common support")
Signed-off-by: Dinghao Liu <dinghao.liu@....edu.cn>
---
drivers/net/ethernet/qlogic/qed/qed_cxt.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/drivers/net/ethernet/qlogic/qed/qed_cxt.c b/drivers/net/ethernet/qlogic/qed/qed_cxt.c
index 65e20693c549..26e247517394 100644
--- a/drivers/net/ethernet/qlogic/qed/qed_cxt.c
+++ b/drivers/net/ethernet/qlogic/qed/qed_cxt.c
@@ -933,6 +933,7 @@ static void qed_ilt_shadow_free(struct qed_hwfn *p_hwfn)
p_dma->virt_addr = NULL;
}
kfree(p_mngr->ilt_shadow);
+ p_hwfn->p_cxt_mngr->ilt_shadow = NULL;
}
static int qed_ilt_blk_alloc(struct qed_hwfn *p_hwfn,
--
2.17.1
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