linux/net
Bruce Allan f35279d3f7 [PATCH] sunrpc: cache_register can use wrong module reference
When registering an RPC cache, cache_register() always sets the owner as the
sunrpc module.  However, there are RPC caches owned by other modules.  With
the incorrect owner setting, the real owning module can be removed potentially
with an open reference to the cache from userspace.

For example, if one were to stop the nfs server and unmount the nfsd
filesystem, the nfsd module could be removed eventhough rpc.idmapd had
references to the idtoname and nametoid caches (i.e.
/proc/net/rpc/nfs4.<cachename>/channel is still open).  This resulted in a
system panic on one of our machines when attempting to restart the nfs
services after reloading the nfsd module.

The following patch adds a 'struct module *owner' field in struct
cache_detail.  The owner is further assigned to the struct proc_dir_entry
in cache_register() so that the module cannot be unloaded while user-space
daemons have an open reference on the associated file under /proc.

Signed-off-by: Bruce Allan <bwa@us.ibm.com>
Cc: Trond Myklebust <trond.myklebust@fys.uio.no>
Cc: Neil Brown <neilb@cse.unsw.edu.au>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-09-07 16:57:25 -07:00
..
802 [NET]: net/802: more endian annotations 2005-08-29 16:10:54 -07:00
8021q [NET]: Kill skb->real_dev 2005-08-29 15:32:25 -07:00
appletalk [TCP]: Move the tcp sock states to net/tcp_states.h 2005-08-29 15:41:54 -07:00
atm [ATM]: net/atm/ioctl.c should #include "common.h" 2005-09-05 18:04:28 -07:00
ax25 [AX25/NETROM/ROSE]: Kill net/ip.h inclusion 2005-08-29 16:08:15 -07:00
bluetooth [NET]: Store skb->timestamp as offset to a base timestamp 2005-08-29 15:58:24 -07:00
bridge [NET]: use __read_mostly on kmem_cache_t , DEFINE_SNMP_STAT pointers 2005-08-29 16:11:18 -07:00
core Merge branch 'upstream' of master.kernel.org:/pub/scm/linux/kernel/git/jgarzik/netdev-2.6 2005-09-06 00:47:18 -07:00
dccp [CCID3]: Call sk->sk_write_space(sk) when receiving a feedback packet 2005-08-29 16:13:46 -07:00
decnet [DECNET]: Tidy send side socket SKB allocation. 2005-09-01 17:43:45 -07:00
econet [NET]: Store skb->timestamp as offset to a base timestamp 2005-08-29 15:58:24 -07:00
ethernet [NET]: Fix sparse warnings 2005-08-29 16:01:32 -07:00
ieee80211 [IEEE80211]: Use correct size_t printf format string in ieee80211_rx.c 2005-09-05 23:19:49 -07:00
ipv4 [TCP]: Fix TCP_OFF() bug check introduced by previous change. 2005-09-05 18:55:48 -07:00
ipv6 [IPV6]: Repair Incoming Interface Handling for Raw Socket. 2005-09-01 17:44:49 -07:00
ipx [NET]: Fix sparse warnings 2005-08-29 16:01:32 -07:00
irda [IRDA]: IrDA prototype fixes 2005-09-05 18:08:11 -07:00
key [IPSEC]: Add XFRM_STATE_NOPMTUDISC flag 2005-06-20 13:21:43 -07:00
lapb [NET]: Kill skb->list 2005-08-29 15:31:14 -07:00
llc [TCP]: Move the tcp sock states to net/tcp_states.h 2005-08-29 15:41:54 -07:00
netfilter [NETFILTER] remove bogus hand-coded htonll() from nenetlink_queue 2005-09-05 18:09:08 -07:00
netlink [NETLINK]: Fix sparse warnings 2005-08-29 16:01:35 -07:00
netrom [AX25/NETROM/ROSE]: Kill net/ip.h inclusion 2005-08-29 16:08:15 -07:00
packet [NET]: Store skb->timestamp as offset to a base timestamp 2005-08-29 15:58:24 -07:00
rose [AX25/NETROM/ROSE]: Kill net/ip.h inclusion 2005-08-29 16:08:15 -07:00
rxrpc [RXRPC]: Fix build failure introduced by skb->stamp changes. 2005-08-29 16:01:24 -07:00
sched [LIB]: Make TEXTSEARCH_BM plain tristate like the others 2005-08-29 16:11:11 -07:00
sctp [SCTP]: net/sctp/sysctl.c should #include <net/sctp/sctp.h> 2005-09-05 18:07:42 -07:00
sunrpc [PATCH] sunrpc: cache_register can use wrong module reference 2005-09-07 16:57:25 -07:00
unix [NET]: Fix sparse warnings 2005-08-29 16:01:32 -07:00
wanrouter [TCP]: Move the tcp sock states to net/tcp_states.h 2005-08-29 15:41:54 -07:00
x25 [TCP]: Move the tcp sock states to net/tcp_states.h 2005-08-29 15:41:54 -07:00
xfrm [NET]: use __read_mostly on kmem_cache_t , DEFINE_SNMP_STAT pointers 2005-08-29 16:11:18 -07:00
compat.c [NET]: Fix memory leak in sys_{send,recv}msg() w/compat 2005-08-09 15:29:19 -07:00
Kconfig /spare/repo/netdev-2.6 branch 'master' 2005-09-01 18:02:01 -04:00
Makefile /spare/repo/netdev-2.6 branch 'master' 2005-09-01 18:02:01 -04:00
nonet.c Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
socket.c [NET]: use __read_mostly on kmem_cache_t , DEFINE_SNMP_STAT pointers 2005-08-29 16:11:18 -07:00
sysctl_net.c [NET]: Fix sparse warnings 2005-08-29 16:01:32 -07:00
TUNABLE Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00