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| author | Mimi Zohar <zohar@linux.vnet.ibm.com> | 2009-11-18 16:16:06 -0500 |
|---|---|---|
| committer | James Morris <jmorris@namei.org> | 2009-11-19 08:42:01 +1100 |
| commit | c09c59e6a070d6af05f238f255aea268185273ef (patch) | |
| tree | 80f4004f11896aa59cf100cf60a08f3af368fc7c /security | |
| parent | ac50e950784cae1c26ad9e09ebd8f8c706131eb3 (diff) | |
| download | lwn-c09c59e6a070d6af05f238f255aea268185273ef.tar.gz lwn-c09c59e6a070d6af05f238f255aea268185273ef.zip | |
ima: replace GFP_KERNEL with GFP_NOFS
While running fsstress tests on the NFSv4 mounted ext3 and ext4
filesystem, the following call trace was generated on the nfs
server machine.
Replace GFP_KERNEL with GFP_NOFS in ima_iint_insert() to avoid a
potential deadlock.
=================================
[ INFO: inconsistent lock state ]
2.6.31-31.el6.x86_64 #1
---------------------------------
inconsistent {RECLAIM_FS-ON-W} -> {IN-RECLAIM_FS-W} usage.
kswapd2/75 [HC0[0]:SC0[0]:HE1:SE1] takes:
(jbd2_handle){+.+.?.}, at: [<ffffffff811edd5e>] jbd2_journal_start+0xfe/0x13f
{RECLAIM_FS-ON-W} state was registered at:
[<ffffffff81091e40>] mark_held_locks+0x65/0x99
[<ffffffff81091f31>] lockdep_trace_alloc+0xbd/0xf5
[<ffffffff81126fdd>] kmem_cache_alloc+0x40/0x185
[<ffffffff812344d7>] ima_iint_insert+0x3d/0xf1
[<ffffffff812345b0>] ima_inode_alloc+0x25/0x44
[<ffffffff811484ac>] inode_init_always+0xec/0x271
[<ffffffff81148682>] alloc_inode+0x51/0xa1
[<ffffffff81148700>] new_inode+0x2e/0x94
[<ffffffff811b2f08>] ext4_new_inode+0xb8/0xdc9
[<ffffffff811be611>] ext4_create+0xcf/0x175
[<ffffffff8113e2cd>] vfs_create+0x82/0xb8
[<ffffffff8113f337>] do_filp_open+0x32c/0x9ee
[<ffffffff811309b9>] do_sys_open+0x6c/0x12c
[<ffffffff81130adc>] sys_open+0x2e/0x44
[<ffffffff81011e42>] system_call_fastpath+0x16/0x1b
[<ffffffffffffffff>] 0xffffffffffffffff
irq event stamp: 90371
hardirqs last enabled at (90371): [<ffffffff8112708d>]
kmem_cache_alloc+0xf0/0x185
hardirqs last disabled at (90370): [<ffffffff81127026>]
kmem_cache_alloc+0x89/0x185
softirqs last enabled at (89492): [<ffffffff81068ecf>]
__do_softirq+0x1bf/0x1eb
softirqs last disabled at (89477): [<ffffffff8101312c>] call_softirq+0x1c/0x30
other info that might help us debug this:
2 locks held by kswapd2/75:
#0: (shrinker_rwsem){++++..}, at: [<ffffffff810f98ba>] shrink_slab+0x44/0x177
#1: (&type->s_umount_key#25){++++..}, at: [<ffffffff811450ba>]
Reported-by: Muni P. Beerakam <mbeeraka@in.ibm.com>
Reported-by: Amit K. Arora <amitarora@in.ibm.com>
Cc: stable@kernel.org
Signed-off-by: Mimi Zohar <zohar@us.ibm.com>
Signed-off-by: James Morris <jmorris@namei.org>
Diffstat (limited to 'security')
| -rw-r--r-- | security/integrity/ima/ima_iint.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/security/integrity/ima/ima_iint.c b/security/integrity/ima/ima_iint.c index b8dd693f8790..a4e2b1dac943 100644 --- a/security/integrity/ima/ima_iint.c +++ b/security/integrity/ima/ima_iint.c @@ -58,11 +58,11 @@ struct ima_iint_cache *ima_iint_insert(struct inode *inode) if (!ima_initialized) return iint; - iint = kmem_cache_alloc(iint_cache, GFP_KERNEL); + iint = kmem_cache_alloc(iint_cache, GFP_NOFS); if (!iint) return iint; - rc = radix_tree_preload(GFP_KERNEL); + rc = radix_tree_preload(GFP_NOFS); if (rc < 0) goto out; |