Kinglong Mee a68465c9cb NFSD: Error out when register_shrinker() fail ... If register_shrinker() failed, nfsd will cause a NULL pointer access as, [ 9250.875465] nfsd: last server has exited, flushing export cache [ 9251.427270] BUG: unable to handle kernel NULL pointer dereference at (null) [ 9251.427393] IP: [<ffffffff8136fc29>] __list_del_entry+0x29/0xd0 [ 9251.427579] PGD 13e4d067 PUD 13e4c067 PMD 0 [ 9251.427633] Oops: 0000 [#1] SMP DEBUG_PAGEALLOC [ 9251.427706] Modules linked in: ip6t_rpfilter ip6t_REJECT bnep bluetooth xt_conntrack cfg80211 rfkill ebtable_nat ebtable_broute bridge stp llc ebtable_filter ebtables ip6table_nat nf_conntrack_ipv6 nf_defrag_ipv6 nf_nat_ipv6 ip6table_mangle ip6table_security ip6table_raw ip6table_filter ip6_tables iptable_nat nf_conntrack_ipv4 nf_defrag_ipv4 nf_nat_ipv4 nf_nat nf_conntrack iptable_mangle iptable_security iptable_raw btrfs xfs microcode ppdev serio_raw pcspkr xor libcrc32c raid6_pq e1000 parport_pc parport i2c_piix4 i2c_core nfsd(OE-) auth_rpcgss nfs_acl lockd sunrpc(E) ata_generic pata_acpi [ 9251.428240] CPU: 0 PID: 1557 Comm: rmmod Tainted: G OE 3.16.0-rc2+ #22 [ 9251.428366] Hardware name: VMware, Inc. VMware Virtual Platform/440BX Desktop Reference Platform, BIOS 6.00 07/31/2013 [ 9251.428496] task: ffff880000849540 ti: ffff8800136f4000 task.ti: ffff8800136f4000 [ 9251.428593] RIP: 0010:[<ffffffff8136fc29>] [<ffffffff8136fc29>] __list_del_entry+0x29/0xd0 [ 9251.428696] RSP: 0018:ffff8800136f7ea0 EFLAGS: 00010207 [ 9251.428751] RAX: 0000000000000000 RBX: ffffffffa0116d48 RCX: dead000000200200 [ 9251.428814] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffffa0116d48 [ 9251.428876] RBP: ffff8800136f7ea0 R08: ffff8800136f4000 R09: 0000000000000001 [ 9251.428939] R10: 8080808080808080 R11: 0000000000000000 R12: ffffffffa011a5a0 [ 9251.429002] R13: 0000000000000800 R14: 0000000000000000 R15: 00000000018ac090 [ 9251.429064] FS: 00007fb9acef0740(0000) GS:ffff88003fa00000(0000) knlGS:0000000000000000 [ 9251.429164] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 9251.429221] CR2: 0000000000000000 CR3: 0000000031a17000 CR4: 00000000001407f0 [ 9251.429306] Stack: [ 9251.429410] ffff8800136f7eb8 ffffffff8136fcdd ffffffffa0116d20 ffff8800136f7ed0 [ 9251.429511] ffffffff8118a0f2 0000000000000000 ffff8800136f7ee0 ffffffffa00eb765 [ 9251.429610] ffff8800136f7ef0 ffffffffa010e93c ffff8800136f7f78 ffffffff81104ac2 [ 9251.429709] Call Trace: [ 9251.429755] [<ffffffff8136fcdd>] list_del+0xd/0x30 [ 9251.429896] [<ffffffff8118a0f2>] unregister_shrinker+0x22/0x40 [ 9251.430037] [<ffffffffa00eb765>] nfsd_reply_cache_shutdown+0x15/0x90 [nfsd] [ 9251.430106] [<ffffffffa010e93c>] exit_nfsd+0x9/0x6cd [nfsd] [ 9251.430192] [<ffffffff81104ac2>] SyS_delete_module+0x162/0x200 [ 9251.430280] [<ffffffff81013b69>] ? do_notify_resume+0x59/0x90 [ 9251.430395] [<ffffffff816f2369>] system_call_fastpath+0x16/0x1b [ 9251.430457] Code: 00 00 55 48 8b 17 48 b9 00 01 10 00 00 00 ad de 48 8b 47 08 48 89 e5 48 39 ca 74 29 48 b9 00 02 20 00 00 00 ad de 48 39 c8 74 7a <4c> 8b 00 4c 39 c7 75 53 4c 8b 42 08 4c 39 c7 75 2b 48 89 42 08 [ 9251.430691] RIP [<ffffffff8136fc29>] __list_del_entry+0x29/0xd0 [ 9251.430755] RSP <ffff8800136f7ea0> [ 9251.430805] CR2: 0000000000000000 [ 9251.431033] ---[ end trace 080f3050d082b4ea ]--- Signed-off-by: Kinglong Mee <kinglongmee@gmail.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: J. Bruce Fields <bfields@redhat.com>		2015-03-20 12:44:00 -04:00
..
acl.h	nfsd4: remove nfs4_acl_new	2014-07-08 17:14:27 -04:00
auth.c	nfsd: silence sparse warning about accessing credentials	2014-07-17 16:15:35 -04:00
auth.h	nfsd: Remove nfsd_luid, nfsd_lgid, nfsd_ruid and nfsd_rgid	2013-02-13 06:15:51 -08:00
blocklayout.c	nfsd: pNFS block layout driver	2015-02-05 14:35:18 +01:00
blocklayoutxdr.c	nfsd: pNFS block layout driver	2015-02-05 14:35:18 +01:00
blocklayoutxdr.h	nfsd: pNFS block layout driver	2015-02-05 14:35:18 +01:00
cache.h	nfsd: Remove the cache_hash list	2014-08-17 12:00:12 -04:00
current_stateid.h	nfsd41: use current stateid by value	2012-02-15 11:20:45 -05:00
export.c	nfsd: implement pNFS operations	2015-02-02 18:09:42 +01:00
export.h	nfsd: implement pNFS operations	2015-02-02 18:09:42 +01:00
fault_inject.c	nfsd: remove old fault injection infrastructure	2014-08-05 10:55:10 -04:00
idmap.h	nfsd4: use xdr_reserve_space in attribute encoding	2014-05-28 14:52:34 -04:00
Kconfig	nfsd: implement pNFS operations	2015-02-02 18:09:42 +01:00
lockd.c	nfsd: Remove deprecated nfsctl system call and related code.	2011-07-15 18:58:42 -04:00
Makefile	nfsd: pNFS block layout driver	2015-02-05 14:35:18 +01:00
netns.h	nfsd: add some comments to the nfsd4 object definitions	2014-08-05 16:09:20 -04:00
nfs2acl.c	NFSD: Check acl returned from get_acl/posix_acl_from_mode	2014-07-11 15:03:53 -04:00
nfs3acl.c	NFSD: Check acl returned from get_acl/posix_acl_from_mode	2014-07-11 15:03:53 -04:00
nfs3proc.c	nfsd: allow turning off nfsv3 readdir_plus	2014-08-18 15:12:14 -04:00
nfs3xdr.c	NFSD: Using min/max/min_t/max_t for calculate	2014-06-23 11:31:36 -04:00
nfs4acl.c	NFSD: Check acl returned from get_acl/posix_acl_from_mode	2014-07-11 15:03:53 -04:00
nfs4callback.c	nfsd: implement pNFS layout recalls	2015-02-02 18:09:43 +01:00
nfs4idmap.c	NFSD: Full checking of authentication name	2014-09-03 17:43:03 -04:00
nfs4layouts.c	NFSD: Check layout type when returning client layouts	2015-03-20 12:43:59 -04:00
nfs4proc.c	nfsd: add trace events	2015-02-02 18:09:44 +01:00
nfs4recover.c	VFS: (Scripted) Convert S_ISLNK/DIR/REG(dentry->d_inode) to d_is_*(dentry)	2015-02-22 11:38:41 -05:00
nfs4state.c	nfsd: fix clp->cl_revoked list deletion causing softlock in nfsd	2015-02-26 15:32:24 -05:00
nfs4xdr.c	NFSD: Take care the return value from nfsd4_decode_stateid	2015-03-20 12:43:59 -04:00
nfscache.c	NFSD: Error out when register_shrinker() fail	2015-03-20 12:44:00 -04:00
nfsctl.c	nfsd: implement pNFS operations	2015-02-02 18:09:42 +01:00
nfsd.h	nfsd: implement pNFS operations	2015-02-02 18:09:42 +01:00
nfsfh.c	VFS: (Scripted) Convert S_ISLNK/DIR/REG(dentry->d_inode) to d_is_*(dentry)	2015-02-22 11:38:41 -05:00
nfsfh.h	nfsd: fix comparison in fh_fsid_match()	2015-02-12 11:26:19 -05:00
nfsproc.c	nfsd: print status when nfsd4_open fails to open file it just created	2014-07-29 23:08:38 -04:00
nfssvc.c	nfsd: default NFSv4.2 to on	2015-02-09 14:58:50 -05:00
nfsxdr.c	NFSD: Using min/max/min_t/max_t for calculate	2014-06-23 11:31:36 -04:00
pnfs.h	nfsd4: fix v3-less build	2015-02-16 11:43:13 -05:00
state.h	nfsd: implement pNFS layout recalls	2015-02-02 18:09:43 +01:00
stats.c	nfsd: move <linux/nfsd/stats.h> to fs/nfsd	2014-05-06 17:54:55 -04:00
stats.h	nfsd: move <linux/nfsd/stats.h> to fs/nfsd	2014-05-06 17:54:55 -04:00
trace.c	nfsd: add trace events	2015-02-02 18:09:44 +01:00
trace.h	nfsd: add trace events	2015-02-02 18:09:44 +01:00
vfs.c	VFS: (Scripted) Convert S_ISLNK/DIR/REG(dentry->d_inode) to d_is_*(dentry)	2015-02-22 11:38:41 -05:00
vfs.h	Merge branch 'for-3.19' of git://linux-nfs.org/~bfields/linux	2014-12-16 15:25:31 -08:00
xdr.h	nfsd: handle vfs_getattr errors in acl protocol	2013-02-26 02:46:09 -05:00
xdr3.h	nfsd: fix encode_entryplus_baggage stack usage	2014-01-23 13:50:27 -05:00
xdr4.h	nfsd: implement pNFS operations	2015-02-02 18:09:42 +01:00
xdr4cb.h	nfsd: implement pNFS layout recalls	2015-02-02 18:09:43 +01:00