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  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, 22 Jul 2020 12:17:01 +0200
From:   Christophe JAILLET <christophe.jaillet@...adoo.fr>
To:     stas.yakovlev@...il.com, kvalo@...eaurora.org, davem@...emloft.net,
        kuba@...nel.org
Cc:     linux-wireless@...r.kernel.org, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org, kernel-janitors@...r.kernel.org,
        Christophe JAILLET <christophe.jaillet@...adoo.fr>
Subject: [PATCH 1/2] ipw2100: Use GFP_KERNEL instead of GFP_ATOMIC in some memory allocation

The call chain is:
   ipw2100_pci_init_one            (the probe function)
     --> ipw2100_queues_allocate
       --> ipw2100_tx_allocate

No lock is taken in the between.
So it is safe to use GFP_KERNEL in 'ipw2100_tx_allocate()'.

BTW, 'ipw2100_queues_allocate()' also calls 'ipw2100_msg_allocate()' which
already allocates some memory using GFP_KERNEL.

Signed-off-by: Christophe JAILLET <christophe.jaillet@...adoo.fr>
---
 drivers/net/wireless/intel/ipw2x00/ipw2100.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/wireless/intel/ipw2x00/ipw2100.c b/drivers/net/wireless/intel/ipw2x00/ipw2100.c
index 83d2f2acc0de..699deca745a2 100644
--- a/drivers/net/wireless/intel/ipw2x00/ipw2100.c
+++ b/drivers/net/wireless/intel/ipw2x00/ipw2100.c
@@ -4430,7 +4430,7 @@ static int ipw2100_tx_allocate(struct ipw2100_priv *priv)
 
 	priv->tx_buffers = kmalloc_array(TX_PENDED_QUEUE_LENGTH,
 					 sizeof(struct ipw2100_tx_packet),
-					 GFP_ATOMIC);
+					 GFP_KERNEL);
 	if (!priv->tx_buffers) {
 		bd_queue_free(priv, &priv->tx_queue);
 		return -ENOMEM;
-- 
2.25.1

Powered by blists - more mailing lists