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From: Erni Sri Satya Vennela <ernis@linux.microsoft.com>
To: kys@microsoft.com, haiyangz@microsoft.com, wei.liu@kernel.org,
	decui@microsoft.com, longli@microsoft.com, andrew+netdev@lunn.ch,
	davem@davemloft.net, edumazet@google.com, kuba@kernel.org,
	pabeni@redhat.com, ernis@linux.microsoft.com,
	ssengar@linux.microsoft.com, dipayanroy@linux.microsoft.com,
	gargaditya@linux.microsoft.com, shirazsaleem@microsoft.com,
	kees@kernel.org, kotaranov@microsoft.com, leon@kernel.org,
	shacharr@microsoft.com, stephen@networkplumber.org,
	linux-hyperv@vger.kernel.org, netdev@vger.kernel.org,
	linux-kernel@vger.kernel.org
Subject: [PATCH net-next 4/4] net: mana: Fix EQ leak in mana_remove on NULL port
Date: Fri,  3 Apr 2026 00:09:43 -0700	[thread overview]
Message-ID: <20260403070948.9225-5-ernis@linux.microsoft.com> (raw)
In-Reply-To: <20260403070948.9225-1-ernis@linux.microsoft.com>

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: ca9c54d2d6a5 ("net: mana: Add a driver for Microsoft Azure Network Adapter (MANA)")
Signed-off-by: Erni Sri Satya Vennela <ernis@linux.microsoft.com>
---
 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 1a141c46ac27..97237d137cbf 100644
--- a/drivers/net/ethernet/microsoft/mana/mana_en.c
+++ b/drivers/net/ethernet/microsoft/mana/mana_en.c
@@ -3747,7 +3747,7 @@ 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;
 		}
 
 		apc = netdev_priv(ndev);
@@ -3778,7 +3778,7 @@ void mana_remove(struct gdma_dev *gd, bool suspending)
 	}
 
 	mana_destroy_eq(ac);
-out:
+
 	if (ac->per_port_queue_reset_wq) {
 		destroy_workqueue(ac->per_port_queue_reset_wq);
 		ac->per_port_queue_reset_wq = NULL;
-- 
2.34.1


  parent reply	other threads:[~2026-04-03  7:10 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2026-04-03  7:09 [PATCH net-next 0/4] net: mana: Fix probe/remove error path bugs Erni Sri Satya Vennela
2026-04-03  7:09 ` [PATCH net-next 1/4] net: mana: Init link_change_work before potential error paths in probe Erni Sri Satya Vennela
2026-04-03  7:09 ` [PATCH net-next 2/4] net: mana: Init gf_stats_work " Erni Sri Satya Vennela
2026-04-03  7:09 ` [PATCH net-next 3/4] net: mana: Don't overwrite port probe error with add_adev result Erni Sri Satya Vennela
2026-04-03  7:09 ` Erni Sri Satya Vennela [this message]
2026-04-04  6:28 ` [PATCH net-next 0/4] net: mana: Fix probe/remove error path bugs Mohsin Bashir

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