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
| ||
|
Date: Fri, 15 Jan 2016 17:20:15 +0100 From: Sebastian Andrzej Siewior <bigeasy@...utronix.de> To: linux-rt-users@...r.kernel.org Cc: linux-kernel@...r.kernel.org, tglx@...utronix.de, Steven Rostedt <rostedt@...dmis.org>, netdev@...r.kernel.org Subject: [PATCH RT 2/2] net/core: skbuf use local lock in __netdev_alloc_skb() local_irq_save() was introduced in v4.2-rc1 via 9451980a6646 ("net: Use cached copy of pfmemalloc to avoid accessing page"). This is only v4.1-RT..v4.4-RT fallout. Signed-off-by: Sebastian Andrzej Siewior <bigeasy@...utronix.de> --- net/core/skbuff.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/net/core/skbuff.c b/net/core/skbuff.c index 7c422e441f1c..53f10c2d7718 100644 --- a/net/core/skbuff.c +++ b/net/core/skbuff.c @@ -434,13 +434,13 @@ struct sk_buff *__netdev_alloc_skb(struct net_device *dev, unsigned int len, if (sk_memalloc_socks()) gfp_mask |= __GFP_MEMALLOC; - local_irq_save(flags); + local_lock_irqsave(netdev_alloc_lock, flags); nc = this_cpu_ptr(&netdev_alloc_cache); data = __alloc_page_frag(nc, len, gfp_mask); pfmemalloc = nc->pfmemalloc; - local_irq_restore(flags); + local_unlock_irqrestore(netdev_alloc_lock, flags); if (unlikely(!data)) return NULL; -- 2.7.0.rc3
Powered by blists - more mailing lists