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linux/fs/nfs
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Alexey Dobriyan 49af7ee181 nfs: fix oops re sysctls and V4 support 
NFS unregisters sysctls only if V4 support is compiled in.  However, sysctl
table is not V4 specific, so unregister it always.

Steps to reproduce:

	[build nfs.ko with CONFIG_NFS_V4=n]
	modrobe nfs
	rmmod nfs
	ls /proc/sys

Unable to handle kernel paging request at ffffffff880661c0 RIP:
 [<ffffffff802af8e3>] proc_sys_readdir+0xd3/0x350
PGD 203067 PUD 207063 PMD 7e216067 PTE 0
Oops: 0000 [1] SMP
CPU 1
Modules linked in: lockd nfs_acl sunrpc
Pid: 3335, comm: ls Not tainted 2.6.23-rc3-bloat #2
RIP: 0010:[<ffffffff802af8e3>]  [<ffffffff802af8e3>] proc_sys_readdir+0xd3/0x350
RSP: 0018:ffff81007fd93e78  EFLAGS: 00010286
RAX: ffffffff880661c0 RBX: ffffffff80466370 RCX: ffffffff880661c0
RDX: 00000000000014c0 RSI: ffff81007f3ad020 RDI: ffff81007efd8b40
RBP: 0000000000000018 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000001 R11: ffffffff802a8570 R12: ffffffff880661c0
R13: ffff81007e219640 R14: ffff81007efd8b40 R15: ffff81007ded7280
FS:  00002ba25ef03060(0000) GS:ffff81007ff81258(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 000000008005003b
CR2: ffffffff880661c0 CR3: 000000007dfaf000 CR4: 00000000000006e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Process ls (pid: 3335, threadinfo ffff81007fd92000, task ffff81007d8a0000)
Stack:  ffff81007f3ad150 ffffffff80283f30 ffff81007fd93f48 ffff81007efd8b40
 ffff81007ee00440 0000000422222222 0000000200035593 ffffffff88037e9a
 2222222222222222 ffffffff80466500 ffff81007e416400 ffff81007e219640
Call Trace:
 [<ffffffff80283f30>] filldir+0x0/0xf0
 [<ffffffff80283f30>] filldir+0x0/0xf0
 [<ffffffff802840c7>] vfs_readdir+0xa7/0xc0
 [<ffffffff80284376>] sys_getdents+0x96/0xe0
 [<ffffffff8020bb3e>] system_call+0x7e/0x83

Code: 41 8b 14 24 85 d2 74 dc 49 8b 44 24 08 48 85 c0 74 e7 49 3b
RIP  [<ffffffff802af8e3>] proc_sys_readdir+0xd3/0x350
 RSP <ffff81007fd93e78>
CR2: ffffffff880661c0
Kernel panic - not syncing: Fatal exception

Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Acked-by: Trond Myklebust <trond.myklebust@fys.uio.no>
Cc: "J. Bruce Fields" <bfields@fieldses.org>
Cc: <stable@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-09-19 11:24:18 -07:00
..
callback_proc.c
callback_xdr.c NFSv4: debug print ntohl(status) in nfs client callback xdr code 2007-07-19 15:21:40 -04:00
callback.c Freezer: make kernel threads nonfreezable by default 2007-07-17 10:23:02 -07:00
callback.h NFS: Fix more sparse warnings 2007-05-14 19:33:46 -04:00
client.c Make NFS client use seq_list_xxx helpers 2007-07-16 09:05:42 -07:00
delegation.c NFSv4: Don't call put_rpccred() from an rcu callback 2007-08-07 15:15:57 -04:00
delegation.h NFSv4: Use RCU to protect delegations 2007-07-10 23:40:41 -04:00
dir.c SUNRPC: Clean up the sillyrename code 2007-07-19 15:21:39 -04:00
direct.c mm: Remove slab destructors from kmem_cache_create(). 2007-07-20 10:11:58 +09:00
file.c NFS: Fix a write request leak in nfs_invalidate_page() 2007-09-01 10:14:54 -04:00
getroot.c NFS: Kill the obsolete NFS_PARANOIA 2007-05-09 17:58:01 -04:00
idmap.c NFS: use __set_current_state() 2007-05-09 17:58:01 -04:00
inode.c NFS: Fix put_nfs_open_context 2007-08-07 15:13:17 -04:00
internal.h NFS: Clean-up: use correct type when converting NFS blocks to local blocks 2007-07-10 23:40:44 -04:00
iostat.h
Makefile NFS: Remake nfsroot_mount as a permanent part of NFS client 2007-07-10 23:40:46 -04:00
mount_clnt.c NFS: Improve debugging output in NFS in-kernel mount client 2007-07-10 23:40:47 -04:00
namespace.c NFS: Fix use of cancel_delayed_work_sync in nfs_release_automount_timer 2007-09-01 10:14:36 -04:00
nfs2xdr.c NFS: Introduce struct nfs_removeargs+nfs_removeres 2007-07-19 15:21:39 -04:00
nfs3acl.c
nfs3proc.c SUNRPC: Clean up the sillyrename code 2007-07-19 15:21:39 -04:00
nfs3xdr.c NFS: Introduce struct nfs_removeargs+nfs_removeres 2007-07-19 15:21:39 -04:00
nfs4_fs.h NFSv4: 'constify' lookup arguments. 2007-07-19 15:09:03 -04:00
nfs4namespace.c
nfs4proc.c NFSv4: Ensure that we pass the correct dentry to nfs4_intent_set_file 2007-09-01 10:14:38 -04:00
nfs4renewd.c NFS: Replace flush_scheduled_work with cancel_work_sync() and friends 2007-08-07 16:12:50 -04:00
nfs4state.c NFSv4: Fix a locking regression in nfs4_set_mode_locked() 2007-08-07 15:13:18 -04:00
nfs4xdr.c NFS: Introduce struct nfs_removeargs+nfs_removeres 2007-07-19 15:21:39 -04:00
nfsroot.c NFS: Remake nfsroot_mount as a permanent part of NFS client 2007-07-10 23:40:46 -04:00
pagelist.c mm: Remove slab destructors from kmem_cache_create(). 2007-07-20 10:11:58 +09:00
proc.c SUNRPC: Clean up the sillyrename code 2007-07-19 15:21:39 -04:00
read.c mm: Remove slab destructors from kmem_cache_create(). 2007-07-20 10:11:58 +09:00
super.c nfs: fix oops re sysctls and V4 support 2007-09-19 11:24:18 -07:00
symlink.c header cleaning: don't include smp_lock.h when not used 2007-05-08 11:15:07 -07:00
sysctl.c [PATCH] nfs: fix congestion control 2007-03-16 19:25:05 -07:00
unlink.c SUNRPC: Clean up the sillyrename code 2007-07-19 15:21:39 -04:00
write.c NFS: Fix a write request leak in nfs_invalidate_page() 2007-09-01 10:14:54 -04:00