From: Lorenzo Bianconi <lorenzo@kernel.org>
To: Andrew Lunn <andrew+netdev@lunn.ch>,
"David S. Miller" <davem@davemloft.net>,
Eric Dumazet <edumazet@google.com>,
Jakub Kicinski <kuba@kernel.org>,
Paolo Abeni <pabeni@redhat.com>, Felix Fietkau <nbd@nbd.name>,
Matthias Brugger <matthias.bgg@gmail.com>,
AngeloGioacchino Del Regno
<angelogioacchino.delregno@collabora.com>
Cc: Florian Westphal <fw@strlen.de>,
linux-arm-kernel@lists.infradead.org,
linux-mediatek@lists.infradead.org, netdev@vger.kernel.org,
Lorenzo Bianconi <lorenzo@kernel.org>
Subject: [PATCH net 0/2] Fix use-after-free in metadata dst teardown in airoha_eth and mtk_eth_soc drivers
Date: Tue, 02 Jun 2026 11:21:03 +0200 [thread overview]
Message-ID: <20260602-airoha-mtk-metadata-uaf-fix-v1-0-3aaa99d83351@kernel.org> (raw)
airoha_metadata_dst_free() and mtk_free_dev() call metadata_dst_free()
which frees the metadata_dst with kfree() immediately, bypassing the RCU
grace period.
Replace metadata_dst_free() with dst_release() which properly goes
through the refcount path and runs call_rcu_hurry() if refcount goes to
zero.
---
Lorenzo Bianconi (2):
net: airoha: Fix use-after-free in metadata dst teardown
net: ethernet: mtk_eth_soc: Fix use-after-free in metadata dst teardown
drivers/net/ethernet/airoha/airoha_eth.c | 2 +-
drivers/net/ethernet/mediatek/mtk_eth_soc.c | 2 +-
2 files changed, 2 insertions(+), 2 deletions(-)
---
base-commit: 3522b21fd7e1863d0734537737bd59f1b90d0190
change-id: 20260602-airoha-mtk-metadata-uaf-fix-eb03badb1a94
Best regards,
--
Lorenzo Bianconi <lorenzo@kernel.org>
next reply other threads:[~2026-06-02 9:21 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-06-02 9:21 Lorenzo Bianconi [this message]
2026-06-02 9:21 ` [PATCH net 1/2] net: airoha: Fix use-after-free in metadata dst teardown Lorenzo Bianconi
2026-06-04 17:38 ` Jacob Keller
2026-06-04 21:23 ` Lorenzo Bianconi
2026-06-04 21:53 ` Jacob Keller
2026-06-02 9:21 ` [PATCH net 2/2] net: ethernet: mtk_eth_soc: " Lorenzo Bianconi
2026-06-04 2:30 ` [PATCH net 0/2] Fix use-after-free in metadata dst teardown in airoha_eth and mtk_eth_soc drivers patchwork-bot+netdevbpf
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