commit 11b47c8828d4cd1df21636719603784ec5e26067
Author: Herbert Xu <[EMAIL PROTECTED]>
Date: Wed Mar 5 20:07:37 2008 -0800
IPCOMP: Disable BH on output when using shared tfm
Upstream commit: 21e43188f272c7fd9efc84b8244c0b1dfccaa105
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 <[EMAIL PROTECTED]>
Signed-off-by: David S. Miller <[EMAIL PROTECTED]>
Signed-off-by: Greg Kroah-Hartman <[EMAIL PROTECTED]>
Signed-off-by: Chris Wright <[EMAIL PROTECTED]>
diff --git a/net/ipv4/ipcomp.c b/net/ipv4/ipcomp.c
index 80cab8c..b284b4e 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 1c5b09f..f46c38f 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;
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