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Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , netdev@vger.kernel.org, linux-kernel@vger.kernel.org, stable@vger.kernel.org, Fabian Druschke Subject: [PATCH] r8169: avoid OOM when allocating RX buffers Date: Mon, 16 Feb 2026 19:52:45 +0100 Message-ID: <20260216185245.182450-1-fabian@druschke.network> X-Mailer: git-send-email 2.53.0 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" From: Fabian Druschke r8169 allocates order-2 pages for RX buffers during rtl_open(). Under heavy memory fragmentation this allocation may trigger the global OOM killer, causing unrelated user processes to be killed. Use a GFP mask that avoids OOM killer invocation so the allocation can fail gracefully and rtl_open() returns -ENOMEM instead. Cc: stable@vger.kernel.org Signed-off-by: Fabian Druschke --- drivers/net/ethernet/realtek/r8169_main.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/net/ethernet/realtek/r8169_main.c b/drivers/net/ethern= et/realtek/r8169_main.c index 3507c2e28110..3525e889ec1c 100644 --- a/drivers/net/ethernet/realtek/r8169_main.c +++ b/drivers/net/ethernet/realtek/r8169_main.c @@ -3952,7 +3952,8 @@ static struct page *rtl8169_alloc_rx_data(struct rtl8= 169_private *tp, dma_addr_t mapping; struct page *data; =20 - data =3D alloc_pages_node(node, GFP_KERNEL, get_order(R8169_RX_BUF_SIZE)); + gfp_t gfp =3D GFP_KERNEL | __GFP_RETRY_MAYFAIL | __GFP_NOWARN; + data =3D alloc_pages_node(node, gfp, get_order(R8169_RX_BUF_SIZE)); if (!data) return NULL; =20 --=20 2.52.0