From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To: stable@vger.kernel.org
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
	patches@lists.linux.dev,
	Erni Sri Satya Vennela <ernis@linux.microsoft.com>,
	Simon Horman <horms@kernel.org>,
	Paolo Abeni <pabeni@redhat.com>,
	Hamza Mahfooz <hamzamahfooz@linux.microsoft.com>,
	Sasha Levin <sashal@kernel.org>
Subject: [PATCH 6.6 004/166] net: mana: Fix EQ leak in mana_remove on NULL port
Date: Thu, 20 Aug 2026 16:54:23 +0200
Message-ID: <20260820145211.328330007@linuxfoundation.org>
In-Reply-To: <20260820145211.194104353@linuxfoundation.org>
References: <20260820145211.194104353@linuxfoundation.org>
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6.6-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Erni Sri Satya Vennela <ernis@linux.microsoft.com>

[ Upstream commit 65267c9c4f28199985505977bc2c628c82fc50ef ]

In mana_remove(), when a NULL port is encountered in the port iteration
loop, 'goto out' skips the mana_destroy_eq(ac) call, leaking the event
queues allocated earlier by mana_create_eq().

This can happen when mana_probe_port() fails for port 0, leaving
ac->ports[0] as NULL. On driver unload or error cleanup, mana_remove()
hits the NULL entry and jumps past mana_destroy_eq().

Change 'goto out' to 'break' so the for-loop exits normally and
mana_destroy_eq() is always reached. Remove the now-unreferenced out:
label.

Fixes: 1e2d0824a9c3 ("net: mana: Add support for EQ sharing")
Signed-off-by: Erni Sri Satya Vennela <ernis@linux.microsoft.com>
Link: https://patch.msgid.link/20260420124741.1056179-6-ernis@linux.microsoft.com
Reviewed-by: Simon Horman <horms@kernel.org>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
[ hmahfooz: resolve conflict in mana_remove() due to missing commit
  3b194343c250 ("net: mana: Implement ndo_tx_timeout and serialize
  queue resets per port.") ]
Signed-off-by: Hamza Mahfooz <hamzamahfooz@linux.microsoft.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/net/ethernet/microsoft/mana/mana_en.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/net/ethernet/microsoft/mana/mana_en.c b/drivers/net/ethernet/microsoft/mana/mana_en.c
index ec5d38164d41b..2808527315fe5 100644
--- a/drivers/net/ethernet/microsoft/mana/mana_en.c
+++ b/drivers/net/ethernet/microsoft/mana/mana_en.c
@@ -2931,7 +2931,7 @@ void mana_remove(struct gdma_dev *gd, bool suspending)
 		if (!ndev) {
 			if (i == 0)
 				dev_err(dev, "No net device to remove\n");
-			goto out;
+			break;
 		}
 
 		/* All cleanup actions should stay after rtnl_lock(), otherwise
@@ -2958,7 +2958,7 @@ void mana_remove(struct gdma_dev *gd, bool suspending)
 	}
 
 	mana_destroy_eq(ac);
-out:
+
 	mana_gd_deregister_device(gd);
 
 	if (suspending)
-- 
2.53.0