From 21e43188f272c7fd9efc84b8244c0b1dfccaa105 Mon Sep 17 00:00:00 2001 From: Herbert Xu Date: Thu, 28 Feb 2008 11:23:17 -0800 Subject: [PATCH] [IPCOMP]: Disable BH on output when using shared tfm Because we use shared tfm objects in order to conserve memory, (each tfm requires 128K of vmalloc memory), BH needs to be turned off on output as that can occur in process context. Previously this was done implicitly by the xfrm output code. That was lost when it became lockless. So we need to add the BH disabling to IPComp directly. Signed-off-by: Herbert Xu Signed-off-by: David S. Miller --- net/ipv4/ipcomp.c | 5 ++++- net/ipv6/ipcomp6.c | 2 ++ 2 files changed, 6 insertions(+), 1 deletion(-) diff --git a/net/ipv4/ipcomp.c b/net/ipv4/ipcomp.c index ae1f45fc23b..58b60b2fb01 100644 --- a/net/ipv4/ipcomp.c +++ b/net/ipv4/ipcomp.c @@ -108,8 +108,11 @@ static int ipcomp_compress(struct xfrm_state *x, struct sk_buff *skb) const int cpu = get_cpu(); u8 *scratch = *per_cpu_ptr(ipcomp_scratches, cpu); struct crypto_comp *tfm = *per_cpu_ptr(ipcd->tfms, cpu); - int err = crypto_comp_compress(tfm, start, plen, scratch, &dlen); + int err; + local_bh_disable(); + err = crypto_comp_compress(tfm, start, plen, scratch, &dlen); + local_bh_enable(); if (err) goto out; diff --git a/net/ipv6/ipcomp6.c b/net/ipv6/ipcomp6.c index b90039593a7..e3dcfa2f436 100644 --- a/net/ipv6/ipcomp6.c +++ b/net/ipv6/ipcomp6.c @@ -146,7 +146,9 @@ static int ipcomp6_output(struct xfrm_state *x, struct sk_buff *skb) scratch = *per_cpu_ptr(ipcomp6_scratches, cpu); tfm = *per_cpu_ptr(ipcd->tfms, cpu); + local_bh_disable(); err = crypto_comp_compress(tfm, start, plen, scratch, &dlen); + local_bh_enable(); if (err || (dlen + sizeof(*ipch)) >= plen) { put_cpu(); goto out_ok; -- 2.20.1