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linux/security
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Mimi Zohar c09c59e6a0 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>
2009-11-19 08:42:01 +11:00
..
integrity/ima ima: replace GFP_KERNEL with GFP_NOFS 2009-11-19 08:42:01 +11:00
keys KEYS: get_instantiation_keyring() should inc the keyring refcount in all cases 2009-10-15 15:19:58 -07:00
selinux do_wait() wakeup optimization: change __wake_up_parent() to use filtered wakeup 2009-09-24 07:20:59 -07:00
smack seq_file: constify seq_operations 2009-09-23 07:39:29 -07:00
tomoyo KEYS: Add a keyctl to install a process's session keyring on its parent [try #6] 2009-09-02 21:29:22 +10:00
capability.c LSM/SELinux: inode_{get,set,notify}secctx hooks to access LSM security context information. 2009-09-10 10:11:24 +10:00
commoncap.c
device_cgroup.c cgroups: let ss->can_attach and ss->attach do whole threadgroups at a time 2009-09-24 07:20:58 -07:00
inode.c
Kconfig
lsm_audit.c lsm: Use a compressed IPv6 string format in audit events 2009-09-24 03:50:26 -04:00
Makefile
min_addr.c sysctl: remove "struct file *" argument of ->proc_handler 2009-09-24 07:21:04 -07:00
root_plug.c
security.c LSM/SELinux: inode_{get,set,notify}secctx hooks to access LSM security context information. 2009-09-10 10:11:24 +10:00