Re: [Lksctp-developers] Re: (more) Sleeping function called from illegal context...

[Jon Grimm <jgrimm2@us.ibm.com>]

See Patch below to stop any bleeding.   I'll feed the patch in through
DaveM.  

Thanks, Jon  

Andrew Morton wrote:
> 
> Luc Van Oostenryck wrote:
> >

> >
> 
> sctp_v4_get_local_addr_list():
> 
>                 /* XXX BUG: sleeping allocation with lock held -DaveM */
>                 addr = t_new(struct sockaddr_storage_list, GFP_KERNEL);
> 
> Is true.  We're holding dev_base_lock, inetdev_lock and in_dev->lock
> here.

# This is a BitKeeper generated patch for the following project:
# Project Name: Linux kernel tree
# This patch format is intended for GNU patch command version 2.5 or
higher.
# This patch includes the following deltas:
#	           ChangeSet	1.655   -> 1.656  
#	 net/sctp/protocol.c	1.7     -> 1.8    
#
# The following is the BitKeeper ChangeSet Log
# --------------------------------------------
# 02/09/30	jgrimm@touki.austin.ibm.com	1.656
# sctp:  Fix GFP_KERNEL allocation with lock held. 
# --------------------------------------------
#
diff -Nru a/net/sctp/protocol.c b/net/sctp/protocol.c
--- a/net/sctp/protocol.c	Mon Sep 30 08:20:55 2002
+++ b/net/sctp/protocol.c	Mon Sep 30 08:20:55 2002
@@ -119,8 +119,7 @@
 
 	for (ifa = in_dev->ifa_list; ifa; ifa = ifa->ifa_next) {
 		/* Add the address to the local list.  */
-		/* XXX BUG: sleeping allocation with lock held -DaveM */
-		addr = t_new(struct sockaddr_storage_list, GFP_KERNEL);
+		addr = t_new(struct sockaddr_storage_list, GFP_ATOMIC);
 		if (addr) {
 			INIT_LIST_HEAD(&addr->list);
 			addr->a.v4.sin_family = AF_INET;
@@ -157,8 +156,7 @@
 	read_lock_bh(&in6_dev->lock);
 	for (ifp = in6_dev->addr_list; ifp; ifp = ifp->if_next) {
 		/* Add the address to the local list.  */
-		/* XXX BUG: sleeping allocation with lock held -DaveM */
-		addr = t_new(struct sockaddr_storage_list, GFP_KERNEL);
+		addr = t_new(struct sockaddr_storage_list, GFP_ATOMIC);
 		if (addr) {
 			addr->a.v6.sin6_family = AF_INET6;
 			addr->a.v6.sin6_port = 0;