netdev - [PATCH] net: nixge: Use GFP_KERNEL instead of GFP

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Date:   Wed, 16 Feb 2022 21:38:11 +0100
From:   Christophe JAILLET <christophe.jaillet@...adoo.fr>
To:     "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>
Cc:     linux-kernel@...r.kernel.org, kernel-janitors@...r.kernel.org,
        Christophe JAILLET <christophe.jaillet@...adoo.fr>,
        netdev@...r.kernel.org
Subject: [PATCH] net: nixge: Use GFP_KERNEL instead of GFP_ATOMIC when possible

NIXGE_MAX_JUMBO_FRAME_SIZE is over 9000 bytes and RX_BD_NUM 128.

So this loop allocates more than 1 Mo of memory.

Previous memory allocations in this function already use GFP_KERNEL, so
use __netdev_alloc_skb_ip_align() and an explicit GFP_KERNEL instead of a
implicit GFP_ATOMIC.

This gives more opportunities of successful allocation.

Signed-off-by: Christophe JAILLET <christophe.jaillet@...adoo.fr>
---
 drivers/net/ethernet/ni/nixge.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/drivers/net/ethernet/ni/nixge.c b/drivers/net/ethernet/ni/nixge.c
index 07a00dd9cfe0..4b3482ce90a1 100644
--- a/drivers/net/ethernet/ni/nixge.c
+++ b/drivers/net/ethernet/ni/nixge.c
@@ -324,8 +324,9 @@ static int nixge_hw_dma_bd_init(struct net_device *ndev)
 					 + sizeof(*priv->rx_bd_v) *
 					 ((i + 1) % RX_BD_NUM));
 
-		skb = netdev_alloc_skb_ip_align(ndev,
-						NIXGE_MAX_JUMBO_FRAME_SIZE);
+		skb = __netdev_alloc_skb_ip_align(ndev,
+						  NIXGE_MAX_JUMBO_FRAME_SIZE,
+						  GFP_KERNEL);
 		if (!skb)
 			goto out;
 
-- 
2.32.0