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f259613a1e
linux/fs/nfs
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NeilBrown f259613a1e NFS: avoid NULL dereference in nfs_destroy_server 
In rare circumstances, nfs_clone_server() of a v2 or v3 server can get
an error between setting server->destory (to nfs_destroy_server), and
calling nfs_start_lockd (which will set server->nlm_host).

If this happens, nfs_clone_server will call nfs_free_server which
will call nfs_destroy_server and thence nlmclnt_done(NULL).  This
causes the NULL to be dereferenced.

So add a guard to only call nlmclnt_done() if ->nlm_host is not NULL.

The other guards there are irrelevant as nlm_host can only be non-NULL
if one of these flags are set - so remove those tests.  (Thanks to Trond
for this suggestion).

This is suitable for any stable kernel since 2.6.25.

Cc: stable@vger.kernel.org
Signed-off-by: NeilBrown <neilb@suse.de>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
2012-12-12 23:55:56 -05:00
..
blocklayout NFSv4.1: Move slot table and session struct definitions to nfs4session.h 2012-12-06 00:30:46 +01:00
objlayout NFSv4.1: Remove unused function last_byte_offset 2012-11-04 14:43:38 -05:00
cache_lib.c NFSv4: Get rid of unnecessary BUG_ON()s 2012-11-04 14:43:39 -05:00
cache_lib.h NFS: DNS resolver PipeFS notifier introduced 2012-01-31 18:20:26 -05:00
callback_proc.c NFSv4.1: Cleanup move session slot management to fs/nfs/nfs4session.c 2012-12-06 00:30:45 +01:00
callback_xdr.c NFSv4.1: Move slot table and session struct definitions to nfs4session.h 2012-12-06 00:30:46 +01:00
callback.c NFSv4: Fix the return value for nfs_callback_start_svc 2012-10-16 13:14:42 -04:00
callback.h NFSv4.1: Clean up session draining 2012-12-06 00:30:44 +01:00
client.c NFS: avoid NULL dereference in nfs_destroy_server 2012-12-12 23:55:56 -05:00
delegation.c NFS: Create a return_delegation rpc op 2012-06-29 11:46:45 -04:00
delegation.h NFS: Convert v4 into a module 2012-07-30 19:06:52 -04:00
dir.c NFSv4: Add ACCESS operation to OPEN compound 2012-10-01 15:20:11 -07:00
direct.c nfs: fix page dirtying in NFS DIO read codepath 2012-12-12 12:56:19 -05:00
dns_resolve.c NFS: fix bug in legacy DNS resolver. 2012-10-31 16:25:59 -04:00
dns_resolve.h NFS: DNS resolver cache per network namespace context introduced 2012-01-31 18:20:26 -05:00
file.c NFS client updates for Linux 3.7 2012-10-10 23:52:35 +09:00
fscache-index.c NFS: Use the inode->i_version to cache NFSv4 change attribute information 2011-10-18 09:14:34 -07:00
fscache.c NFS: Don't pass mount data to nfs_fscache_get_super_cookie() 2012-05-14 17:30:26 -07:00
fscache.h NFS: Fix a compile issue when CONFIG_NFS_FSCACHE was undefined 2012-05-16 10:24:20 -07:00
getroot.c nfs: include internal.h in getroot.h 2012-10-02 08:17:04 -07:00
idmap.c NFS: Set key construction data for the legacy upcall 2012-10-02 13:04:09 -07:00
inode.c NFS: Remove BUG_ON()s in the fs/nfs/inode.c 2012-11-04 14:43:39 -05:00
internal.h NFSv4: Simplify the NFSv4/v4.1 synchronous call switch 2012-12-06 00:30:49 +01:00
iostat.h
Kconfig NFSv4.1: Remove the dependency on CONFIG_EXPERIMENTAL 2012-10-03 10:54:50 -07:00
Makefile NFSv4.1: Cleanup move session slot management to fs/nfs/nfs4session.c 2012-12-06 00:30:45 +01:00
mount_clnt.c NFS: Remove the BUG_ON() in the mount code 2012-11-04 14:43:39 -05:00
namespace.c nfs: Show original device name verbatim in /proc/*/mount{s,info} 2012-10-31 16:26:26 -04:00
netns.h nfs: include NFSv4 header in netns.h 2012-10-02 08:17:02 -07:00
nfs2super.c NFS: Convert v2 into a module 2012-07-30 19:06:41 -04:00
nfs2xdr.c NFS: Remove asserts from the NFS XDR code 2012-11-04 14:43:38 -05:00
nfs3acl.c userns: Pass a userns parameter into posix_acl_to_xattr and posix_acl_from_xattr 2012-09-18 01:01:35 -07:00
nfs3client.c NFS: Only initialize the ACL client in the v3 case 2012-07-30 19:05:54 -04:00
nfs3proc.c SUNRPC handle EKEYEXPIRED in call_refreshresult 2012-12-12 15:36:02 -05:00
nfs3super.c NFS: Convert v3 into a module 2012-07-30 19:06:46 -04:00
nfs3xdr.c NFS: Remove asserts from the NFS XDR code 2012-11-04 14:43:38 -05:00
nfs4_fs.h Merge branch 'bugfixes' into nfs-for-next 2012-12-11 09:16:26 -05:00
nfs4client.c NFSv4.1: Cleanup move session slot management to fs/nfs/nfs4session.c 2012-12-06 00:30:45 +01:00
nfs4file.c NFSv4: Get rid of unnecessary BUG_ON()s 2012-11-04 14:43:39 -05:00
nfs4filelayout.c SUNRPC handle EKEYEXPIRED in call_refreshresult 2012-12-12 15:36:02 -05:00
nfs4filelayout.h NFSv4.1: Kill nfs4_ds_disconnect() 2012-10-15 10:49:42 -04:00
nfs4filelayoutdev.c NFSv4.1: Cleanup move session slot management to fs/nfs/nfs4session.c 2012-12-06 00:30:45 +01:00
nfs4getroot.c NFSv4: fs/nfs/nfs4getroot.c needs to include "internal.h" 2012-10-16 12:37:59 -04:00
nfs4namespace.c nfs: Show original device name verbatim in /proc/*/mount{s,info} 2012-10-31 16:26:26 -04:00
nfs4proc.c SUNRPC handle EKEYEXPIRED in call_refreshresult 2012-12-12 15:36:02 -05:00
nfs4renewd.c workqueue: use mod_delayed_work() instead of cancel + queue 2012-08-13 16:27:37 -07:00
nfs4session.c NFSv4.1: Be conservative about the client highest slotid 2012-12-11 12:29:10 -05:00
nfs4session.h NFSv4.1: Try to eliminate outliers when updating target_highest_slotid 2012-12-06 00:30:53 +01:00
nfs4state.c SUNRPC handle EKEYEXPIRED in call_refreshresult 2012-12-12 15:36:02 -05:00
nfs4super.c NFS: Fix a regression when loading the NFS v4 module 2012-08-16 16:15:49 -04:00
nfs4sysctl.c nfs: include nfs4_fh.h in nfs4sysctl.c 2012-10-02 08:17:03 -07:00
nfs4xdr.c Merge branch 'bugfixes' into nfs-for-next 2012-12-11 09:16:26 -05:00
nfs.h NFS: Convert v4 into a module 2012-07-30 19:06:52 -04:00
nfsroot.c SUNRPC/NFS: Add Kbuild dependencies for NFS_DEBUG/RPC_DEBUG 2012-03-20 13:08:26 -04:00
pagelist.c NFS: Clean up helper function nfs4_select_rw_stateid() 2012-09-28 16:03:04 -04:00
pnfs_dev.c NFSv4.1: pNFS data servers may be temporarily offline 2012-09-28 16:03:09 -04:00
pnfs.c NFSv4.1: Remove assertion BUG_ON()s from the files and generic layout code 2012-11-04 14:43:39 -05:00
pnfs.h NFSv4.1: Do not call pnfs_return_layout() from an rpciod context 2012-10-15 10:49:43 -04:00
proc.c SUNRPC handle EKEYEXPIRED in call_refreshresult 2012-12-12 15:36:02 -05:00
read.c Merge branch 'akpm' (Andrew's patch-bomb) 2012-07-31 19:25:39 -07:00
super.c NFSv4.1: Move slot table and session struct definitions to nfs4session.h 2012-12-06 00:30:46 +01:00
symlink.c
sysctl.c NFS: Initialize v4 sysctls from nfs_init_v4() 2012-07-17 13:33:18 -04:00
unlink.c NFS: add nfs_sb_deactive_async to avoid deadlock 2012-10-31 16:26:26 -04:00
write.c Merge branch 'bugfixes' into nfs-for-next 2012-12-11 09:16:26 -05:00