subject:"possible circular locking in reiserfs

Re: possible circular locking in reiserfs_removexattr

2008-02-22 Thread Jeff Mahoney

-BEGIN PGP SIGNED MESSAGE-
Hash: SHA1

Laurent Riffard wrote:
> Hello,
> 
> I've got this while running beagle. /home is mounted with the following
> options:

Thanks for the report. I have a patch queue I'm hoping to send to -mm
next week that cleans up the xattr code a lot and makes the locking
quite a bit saner. It's been in openSUSE for a few generations, so
hopefully there won't be a long incubation before it hits mainline.

- -Jeff

> /dev/mapper/vglinux1-lvhome /home reiserfs
> rw,noatime,nodiratime,user_xattr 0 0
> 
> This still happens with latest kernel (next-20080222), I can't tell when
> it first appears.
> 
> ===
> [ INFO: possible circular locking dependency detected ]
> 2.6.25-rc1 #15
> ---
> beagled/3781 is trying to acquire lock:
> (_I(inode)->xattr_sem){}, at: []
> reiserfs_removexattr+0x42/0xbf [reiserfs]
> 
> but task is already holding lock:
> (>s_type->i_mutex_key#8){--..}, at: []
> vfs_removexattr+0x59/0xc2
> 
> which lock already depends on the new lock.
> 
> 
> the existing dependency chain (in reverse order) is:
> 
> -> #2 (>s_type->i_mutex_key#8){--..}:
>   [] __lock_acquire+0x8d9/0xa83
>   [] reiserfs_file_release+0x171/0x3b2 [reiserfs]
>   [] lock_acquire+0x4c/0x63
>   [] reiserfs_file_release+0x171/0x3b2 [reiserfs]
>   [] mutex_lock_nested+0xa9/0x219
>   [] reiserfs_file_release+0x171/0x3b2 [reiserfs]
>   [] reiserfs_file_release+0x171/0x3b2 [reiserfs]
>   [] __fput+0x90/0x155
>   [] reiserfs_xattr_set+0x2a2/0x2c5 [reiserfs]
>   [] reiserfs_setxattr+0x7a/0xe3 [reiserfs]
>   [] reiserfs_setxattr+0x0/0xe3 [reiserfs]
>   [] vfs_setxattr+0x74/0xe4
>   [] setxattr+0xad/0xc7
>   [] _spin_unlock+0x25/0x3a
>   [] _atomic_dec_and_lock+0x22/0x2c
>   [] mntput_no_expire+0x11/0x5b
>   [] link_path_walk+0xa5/0xaf
>   [] restore_nocheck+0x12/0x15
>   [] do_page_fault+0x0/0x484
>   [] trace_hardirqs_on+0xdd/0xfd
>   [] kmem_cache_free+0x53/0x5a
>   [] trace_hardirqs_on+0xdd/0xfd
>   [] __user_walk_fd+0x37/0x3f
>   [] sys_lsetxattr+0x37/0x4a
>   [] restore_nocheck+0x12/0x15
>   [] do_page_fault+0x0/0x484
>   [] trace_hardirqs_on+0xdd/0xfd
>   [] restore_nocheck+0x12/0x15
>   [] sysenter_past_esp+0x5f/0xa5
>   [] 0x
> 
> -> #1 (_SB(s)->xattr_dir_sem){}:
>   [] __lock_acquire+0x8d9/0xa83
>   [] reiserfs_setxattr+0x68/0xe3 [reiserfs]
>   [] lock_acquire+0x4c/0x63
>   [] reiserfs_setxattr+0x68/0xe3 [reiserfs]
>   [] down_write+0x17/0x2f
>   [] reiserfs_setxattr+0x68/0xe3 [reiserfs]
>   [] reiserfs_setxattr+0x68/0xe3 [reiserfs]
>   [] reiserfs_setxattr+0x0/0xe3 [reiserfs]
>   [] vfs_setxattr+0x74/0xe4
>   [] setxattr+0xad/0xc7
>   [] _spin_unlock+0x25/0x3a
>   [] _atomic_dec_and_lock+0x22/0x2c
>   [] mntput_no_expire+0x11/0x5b
>   [] link_path_walk+0xa5/0xaf
>   [] restore_nocheck+0x12/0x15
>   [] do_page_fault+0x0/0x484
>   [] trace_hardirqs_on+0xdd/0xfd
>   [] kmem_cache_free+0x53/0x5a
>   [] trace_hardirqs_on+0xdd/0xfd
>   [] __user_walk_fd+0x37/0x3f
>   [] sys_lsetxattr+0x37/0x4a
>   [] restore_nocheck+0x12/0x15
>   [] do_page_fault+0x0/0x484
>   [] trace_hardirqs_on+0xdd/0xfd
>   [] restore_nocheck+0x12/0x15
>   [] sysenter_past_esp+0x5f/0xa5
>   [] 0x
> 
> -> #0 (_I(inode)->xattr_sem){}:
>   [] __lock_acquire+0x7f9/0xa83
>   [] lock_acquire+0x4c/0x63
>   [] reiserfs_removexattr+0x42/0xbf [reiserfs]
>   [] down_write+0x17/0x2f
>   [] reiserfs_removexattr+0x42/0xbf [reiserfs]
>   [] reiserfs_removexattr+0x42/0xbf [reiserfs]
>   [] vfs_removexattr+0x67/0xc2
>   [] removexattr+0x3d/0x4a
>   [] _spin_unlock+0x25/0x3a
>   [] _atomic_dec_and_lock+0x22/0x2c
>   [] mntput_no_expire+0x11/0x5b
>   [] link_path_walk+0xa5/0xaf
>   [] sysenter_past_esp+0x9a/0xa5
>   [] trace_hardirqs_on+0xdd/0xfd
>   [] kmem_cache_free+0x53/0x5a
>   [] trace_hardirqs_on+0xdd/0xfd
>   [] __user_walk_fd+0x37/0x3f
>   [] sys_lremovexattr+0x2b/0x3c
>   [] sysenter_past_esp+0x9a/0xa5
>   [] trace_hardirqs_on+0xdd/0xfd
>   [] sysenter_past_esp+0x9a/0xa5
>   [] sysenter_past_esp+0x5f/0xa5
>   [] 0x
> 
> other info that might help us debug this:
> 
> 1 lock held by beagled/3781:
> #0:  (>s_type->i_mutex_key#8){--..}, at: []
> vfs_removexattr+0x59/0xc2
> 
> stack backtrace:
> Pid: 3781, comm: beagled Not tainted 2.6.25-rc1 #15
> [] print_circular_bug_tail+0x56/0x60
> [] __lock_acquire+0x7f9/0xa83
> [] lock_acquire+0x4c/0x63
> [] reiserfs_removexattr+0x42/0xbf [reiserfs]
> [] down_write+0x17/0x2f
> [] reiserfs_removexattr+0x42/0xbf [reiserfs]
> [] reiserfs_removexattr+0x42/0xbf [reiserfs]
> [] vfs_removexattr+0x67/0xc2
> [] removexattr+0x3d/0x4a
> []

possible circular locking in reiserfs_removexattr

2008-02-22 Thread Laurent Riffard


Hello,

I've got this while running beagle. /home is mounted with the following options:

/dev/mapper/vglinux1-lvhome /home reiserfs rw,noatime,nodiratime,user_xattr 0 0

This still happens with latest kernel (next-20080222), I can't tell when it 
first appears.


===
[ INFO: possible circular locking dependency detected ]
2.6.25-rc1 #15
---
beagled/3781 is trying to acquire lock:
(_I(inode)->xattr_sem){}, at: [] 
reiserfs_removexattr+0x42/0xbf [reiserfs]

but task is already holding lock:
(>s_type->i_mutex_key#8){--..}, at: [] vfs_removexattr+0x59/0xc2

which lock already depends on the new lock.


the existing dependency chain (in reverse order) is:

-> #2 (>s_type->i_mutex_key#8){--..}:
  [] __lock_acquire+0x8d9/0xa83
  [] reiserfs_file_release+0x171/0x3b2 [reiserfs]
  [] lock_acquire+0x4c/0x63
  [] reiserfs_file_release+0x171/0x3b2 [reiserfs]
  [] mutex_lock_nested+0xa9/0x219
  [] reiserfs_file_release+0x171/0x3b2 [reiserfs]
  [] reiserfs_file_release+0x171/0x3b2 [reiserfs]
  [] __fput+0x90/0x155
  [] reiserfs_xattr_set+0x2a2/0x2c5 [reiserfs]
  [] reiserfs_setxattr+0x7a/0xe3 [reiserfs]
  [] reiserfs_setxattr+0x0/0xe3 [reiserfs]
  [] vfs_setxattr+0x74/0xe4
  [] setxattr+0xad/0xc7
  [] _spin_unlock+0x25/0x3a
  [] _atomic_dec_and_lock+0x22/0x2c
  [] mntput_no_expire+0x11/0x5b
  [] link_path_walk+0xa5/0xaf
  [] restore_nocheck+0x12/0x15
  [] do_page_fault+0x0/0x484
  [] trace_hardirqs_on+0xdd/0xfd
  [] kmem_cache_free+0x53/0x5a
  [] trace_hardirqs_on+0xdd/0xfd
  [] __user_walk_fd+0x37/0x3f
  [] sys_lsetxattr+0x37/0x4a
  [] restore_nocheck+0x12/0x15
  [] do_page_fault+0x0/0x484
  [] trace_hardirqs_on+0xdd/0xfd
  [] restore_nocheck+0x12/0x15
  [] sysenter_past_esp+0x5f/0xa5
  [] 0x

-> #1 (_SB(s)->xattr_dir_sem){}:
  [] __lock_acquire+0x8d9/0xa83
  [] reiserfs_setxattr+0x68/0xe3 [reiserfs]
  [] lock_acquire+0x4c/0x63
  [] reiserfs_setxattr+0x68/0xe3 [reiserfs]
  [] down_write+0x17/0x2f
  [] reiserfs_setxattr+0x68/0xe3 [reiserfs]
  [] reiserfs_setxattr+0x68/0xe3 [reiserfs]
  [] reiserfs_setxattr+0x0/0xe3 [reiserfs]
  [] vfs_setxattr+0x74/0xe4
  [] setxattr+0xad/0xc7
  [] _spin_unlock+0x25/0x3a
  [] _atomic_dec_and_lock+0x22/0x2c
  [] mntput_no_expire+0x11/0x5b
  [] link_path_walk+0xa5/0xaf
  [] restore_nocheck+0x12/0x15
  [] do_page_fault+0x0/0x484
  [] trace_hardirqs_on+0xdd/0xfd
  [] kmem_cache_free+0x53/0x5a
  [] trace_hardirqs_on+0xdd/0xfd
  [] __user_walk_fd+0x37/0x3f
  [] sys_lsetxattr+0x37/0x4a
  [] restore_nocheck+0x12/0x15
  [] do_page_fault+0x0/0x484
  [] trace_hardirqs_on+0xdd/0xfd
  [] restore_nocheck+0x12/0x15
  [] sysenter_past_esp+0x5f/0xa5
  [] 0x

-> #0 (_I(inode)->xattr_sem){}:
  [] __lock_acquire+0x7f9/0xa83
  [] lock_acquire+0x4c/0x63
  [] reiserfs_removexattr+0x42/0xbf [reiserfs]
  [] down_write+0x17/0x2f
  [] reiserfs_removexattr+0x42/0xbf [reiserfs]
  [] reiserfs_removexattr+0x42/0xbf [reiserfs]
  [] vfs_removexattr+0x67/0xc2
  [] removexattr+0x3d/0x4a
  [] _spin_unlock+0x25/0x3a
  [] _atomic_dec_and_lock+0x22/0x2c
  [] mntput_no_expire+0x11/0x5b
  [] link_path_walk+0xa5/0xaf
  [] sysenter_past_esp+0x9a/0xa5
  [] trace_hardirqs_on+0xdd/0xfd
  [] kmem_cache_free+0x53/0x5a
  [] trace_hardirqs_on+0xdd/0xfd
  [] __user_walk_fd+0x37/0x3f
  [] sys_lremovexattr+0x2b/0x3c
  [] sysenter_past_esp+0x9a/0xa5
  [] trace_hardirqs_on+0xdd/0xfd
  [] sysenter_past_esp+0x9a/0xa5
  [] sysenter_past_esp+0x5f/0xa5
  [] 0x

other info that might help us debug this:

1 lock held by beagled/3781:
#0:  (>s_type->i_mutex_key#8){--..}, at: [] 
vfs_removexattr+0x59/0xc2

stack backtrace:
Pid: 3781, comm: beagled Not tainted 2.6.25-rc1 #15
[] print_circular_bug_tail+0x56/0x60
[] __lock_acquire+0x7f9/0xa83
[] lock_acquire+0x4c/0x63
[] reiserfs_removexattr+0x42/0xbf [reiserfs]
[] down_write+0x17/0x2f
[] reiserfs_removexattr+0x42/0xbf [reiserfs]
[] reiserfs_removexattr+0x42/0xbf [reiserfs]
[] vfs_removexattr+0x67/0xc2
[] removexattr+0x3d/0x4a
[] _spin_unlock+0x25/0x3a
[] _atomic_dec_and_lock+0x22/0x2c
[] mntput_no_expire+0x11/0x5b
[] link_path_walk+0xa5/0xaf
[] sysenter_past_esp+0x9a/0xa5
[] trace_hardirqs_on+0xdd/0xfd
[] kmem_cache_free+0x53/0x5a
[] trace_hardirqs_on+0xdd/0xfd
[] __user_walk_fd+0x37/0x3f
[] sys_lremovexattr+0x2b/0x3c
[] sysenter_past_esp+0x9a/0xa5
[] trace_hardirqs_on+0xdd/0xfd
[] sysenter_past_esp+0x9a/0xa5
[] sysenter_past_esp+0x5f/0xa5
===

step to reproduce:
- mount /home as reiserfs with user_xattr option.
- run "beagled --fg --debug --indexing-delay 5", and wait 10 seconds.


~~
laurent
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possible circular locking in reiserfs_removexattr

2008-02-22 Thread Laurent Riffard


Hello,

I've got this while running beagle. /home is mounted with the following options:

/dev/mapper/vglinux1-lvhome /home reiserfs rw,noatime,nodiratime,user_xattr 0 0

This still happens with latest kernel (next-20080222), I can't tell when it 
first appears.


===
[ INFO: possible circular locking dependency detected ]
2.6.25-rc1 #15
---
beagled/3781 is trying to acquire lock:
(REISERFS_I(inode)-xattr_sem){}, at: [e1ac02fa] 
reiserfs_removexattr+0x42/0xbf [reiserfs]

but task is already holding lock:
(sb-s_type-i_mutex_key#8){--..}, at: [c016f006] vfs_removexattr+0x59/0xc2

which lock already depends on the new lock.


the existing dependency chain (in reverse order) is:

- #2 (sb-s_type-i_mutex_key#8){--..}:
  [c01311f5] __lock_acquire+0x8d9/0xa83
  [e1aacd0e] reiserfs_file_release+0x171/0x3b2 [reiserfs]
  [c01316f2] lock_acquire+0x4c/0x63
  [e1aacd0e] reiserfs_file_release+0x171/0x3b2 [reiserfs]
  [c0290e57] mutex_lock_nested+0xa9/0x219
  [e1aacd0e] reiserfs_file_release+0x171/0x3b2 [reiserfs]
  [e1aacd0e] reiserfs_file_release+0x171/0x3b2 [reiserfs]
  [c015a01b] __fput+0x90/0x155
  [e1ac0ebd] reiserfs_xattr_set+0x2a2/0x2c5 [reiserfs]
  [e1ac0858] reiserfs_setxattr+0x7a/0xe3 [reiserfs]
  [e1ac07de] reiserfs_setxattr+0x0/0xe3 [reiserfs]
  [c016f3de] vfs_setxattr+0x74/0xe4
  [c016f4fb] setxattr+0xad/0xc7
  [c0292243] _spin_unlock+0x25/0x3a
  [c01bfb26] _atomic_dec_and_lock+0x22/0x2c
  [c016aeee] mntput_no_expire+0x11/0x5b
  [c0160fc2] link_path_walk+0xa5/0xaf
  [c010492b] restore_nocheck+0x12/0x15
  [c01122d0] do_page_fault+0x0/0x484
  [c0130556] trace_hardirqs_on+0xdd/0xfd
  [c0155b72] kmem_cache_free+0x53/0x5a
  [c0130556] trace_hardirqs_on+0xdd/0xfd
  [c01619e7] __user_walk_fd+0x37/0x3f
  [c016f58a] sys_lsetxattr+0x37/0x4a
  [c010492b] restore_nocheck+0x12/0x15
  [c01122d0] do_page_fault+0x0/0x484
  [c0130556] trace_hardirqs_on+0xdd/0xfd
  [c010492b] restore_nocheck+0x12/0x15
  [c0104842] sysenter_past_esp+0x5f/0xa5
  [] 0x

- #1 (REISERFS_SB(s)-xattr_dir_sem){}:
  [c01311f5] __lock_acquire+0x8d9/0xa83
  [e1ac0846] reiserfs_setxattr+0x68/0xe3 [reiserfs]
  [c01316f2] lock_acquire+0x4c/0x63
  [e1ac0846] reiserfs_setxattr+0x68/0xe3 [reiserfs]
  [c0291367] down_write+0x17/0x2f
  [e1ac0846] reiserfs_setxattr+0x68/0xe3 [reiserfs]
  [e1ac0846] reiserfs_setxattr+0x68/0xe3 [reiserfs]
  [e1ac07de] reiserfs_setxattr+0x0/0xe3 [reiserfs]
  [c016f3de] vfs_setxattr+0x74/0xe4
  [c016f4fb] setxattr+0xad/0xc7
  [c0292243] _spin_unlock+0x25/0x3a
  [c01bfb26] _atomic_dec_and_lock+0x22/0x2c
  [c016aeee] mntput_no_expire+0x11/0x5b
  [c0160fc2] link_path_walk+0xa5/0xaf
  [c010492b] restore_nocheck+0x12/0x15
  [c01122d0] do_page_fault+0x0/0x484
  [c0130556] trace_hardirqs_on+0xdd/0xfd
  [c0155b72] kmem_cache_free+0x53/0x5a
  [c0130556] trace_hardirqs_on+0xdd/0xfd
  [c01619e7] __user_walk_fd+0x37/0x3f
  [c016f58a] sys_lsetxattr+0x37/0x4a
  [c010492b] restore_nocheck+0x12/0x15
  [c01122d0] do_page_fault+0x0/0x484
  [c0130556] trace_hardirqs_on+0xdd/0xfd
  [c010492b] restore_nocheck+0x12/0x15
  [c0104842] sysenter_past_esp+0x5f/0xa5
  [] 0x

- #0 (REISERFS_I(inode)-xattr_sem){}:
  [c0131115] __lock_acquire+0x7f9/0xa83
  [c01316f2] lock_acquire+0x4c/0x63
  [e1ac02fa] reiserfs_removexattr+0x42/0xbf [reiserfs]
  [c0291367] down_write+0x17/0x2f
  [e1ac02fa] reiserfs_removexattr+0x42/0xbf [reiserfs]
  [e1ac02fa] reiserfs_removexattr+0x42/0xbf [reiserfs]
  [c016f014] vfs_removexattr+0x67/0xc2
  [c016f0ac] removexattr+0x3d/0x4a
  [c0292243] _spin_unlock+0x25/0x3a
  [c01bfb26] _atomic_dec_and_lock+0x22/0x2c
  [c016aeee] mntput_no_expire+0x11/0x5b
  [c0160fc2] link_path_walk+0xa5/0xaf
  [c010487d] sysenter_past_esp+0x9a/0xa5
  [c0130556] trace_hardirqs_on+0xdd/0xfd
  [c0155b72] kmem_cache_free+0x53/0x5a
  [c0130556] trace_hardirqs_on+0xdd/0xfd
  [c01619e7] __user_walk_fd+0x37/0x3f
  [c016f114] sys_lremovexattr+0x2b/0x3c
  [c010487d] sysenter_past_esp+0x9a/0xa5
  [c0130556] trace_hardirqs_on+0xdd/0xfd
  [c010487d] sysenter_past_esp+0x9a/0xa5
  [c0104842] sysenter_past_esp+0x5f/0xa5
  [] 0x

other info that might help us debug this:

1 lock held by beagled/3781:
#0:  (sb-s_type-i_mutex_key#8){--..}, at: [c016f006] 
vfs_removexattr+0x59/0xc2

stack backtrace:
Pid: 3781, comm: beagled Not tainted 2.6.25-rc1 #15
[c012fafa] print_circular_bug_tail+0x56/0x60
[c0131115] __lock_acquire+0x7f9/0xa83
[c01316f2] lock_acquire+0x4c/0x63
[e1ac02fa] reiserfs_removexattr+0x42/0xbf [reiserfs]
[c0291367] down_write+0x17/0x2f
[e1ac02fa] reiserfs_removexattr+0x42/0xbf [reiserfs]

Re: possible circular locking in reiserfs_removexattr

2008-02-22 Thread Jeff Mahoney

-BEGIN PGP SIGNED MESSAGE-
Hash: SHA1

Laurent Riffard wrote:
 Hello,
 
 I've got this while running beagle. /home is mounted with the following
 options:

Thanks for the report. I have a patch queue I'm hoping to send to -mm
next week that cleans up the xattr code a lot and makes the locking
quite a bit saner. It's been in openSUSE for a few generations, so
hopefully there won't be a long incubation before it hits mainline.

- -Jeff

 /dev/mapper/vglinux1-lvhome /home reiserfs
 rw,noatime,nodiratime,user_xattr 0 0
 
 This still happens with latest kernel (next-20080222), I can't tell when
 it first appears.
 
 ===
 [ INFO: possible circular locking dependency detected ]
 2.6.25-rc1 #15
 ---
 beagled/3781 is trying to acquire lock:
 (REISERFS_I(inode)-xattr_sem){}, at: [e1ac02fa]
 reiserfs_removexattr+0x42/0xbf [reiserfs]
 
 but task is already holding lock:
 (sb-s_type-i_mutex_key#8){--..}, at: [c016f006]
 vfs_removexattr+0x59/0xc2
 
 which lock already depends on the new lock.
 
 
 the existing dependency chain (in reverse order) is:
 
 - #2 (sb-s_type-i_mutex_key#8){--..}:
   [c01311f5] __lock_acquire+0x8d9/0xa83
   [e1aacd0e] reiserfs_file_release+0x171/0x3b2 [reiserfs]
   [c01316f2] lock_acquire+0x4c/0x63
   [e1aacd0e] reiserfs_file_release+0x171/0x3b2 [reiserfs]
   [c0290e57] mutex_lock_nested+0xa9/0x219
   [e1aacd0e] reiserfs_file_release+0x171/0x3b2 [reiserfs]
   [e1aacd0e] reiserfs_file_release+0x171/0x3b2 [reiserfs]
   [c015a01b] __fput+0x90/0x155
   [e1ac0ebd] reiserfs_xattr_set+0x2a2/0x2c5 [reiserfs]
   [e1ac0858] reiserfs_setxattr+0x7a/0xe3 [reiserfs]
   [e1ac07de] reiserfs_setxattr+0x0/0xe3 [reiserfs]
   [c016f3de] vfs_setxattr+0x74/0xe4
   [c016f4fb] setxattr+0xad/0xc7
   [c0292243] _spin_unlock+0x25/0x3a
   [c01bfb26] _atomic_dec_and_lock+0x22/0x2c
   [c016aeee] mntput_no_expire+0x11/0x5b
   [c0160fc2] link_path_walk+0xa5/0xaf
   [c010492b] restore_nocheck+0x12/0x15
   [c01122d0] do_page_fault+0x0/0x484
   [c0130556] trace_hardirqs_on+0xdd/0xfd
   [c0155b72] kmem_cache_free+0x53/0x5a
   [c0130556] trace_hardirqs_on+0xdd/0xfd
   [c01619e7] __user_walk_fd+0x37/0x3f
   [c016f58a] sys_lsetxattr+0x37/0x4a
   [c010492b] restore_nocheck+0x12/0x15
   [c01122d0] do_page_fault+0x0/0x484
   [c0130556] trace_hardirqs_on+0xdd/0xfd
   [c010492b] restore_nocheck+0x12/0x15
   [c0104842] sysenter_past_esp+0x5f/0xa5
   [] 0x
 
 - #1 (REISERFS_SB(s)-xattr_dir_sem){}:
   [c01311f5] __lock_acquire+0x8d9/0xa83
   [e1ac0846] reiserfs_setxattr+0x68/0xe3 [reiserfs]
   [c01316f2] lock_acquire+0x4c/0x63
   [e1ac0846] reiserfs_setxattr+0x68/0xe3 [reiserfs]
   [c0291367] down_write+0x17/0x2f
   [e1ac0846] reiserfs_setxattr+0x68/0xe3 [reiserfs]
   [e1ac0846] reiserfs_setxattr+0x68/0xe3 [reiserfs]
   [e1ac07de] reiserfs_setxattr+0x0/0xe3 [reiserfs]
   [c016f3de] vfs_setxattr+0x74/0xe4
   [c016f4fb] setxattr+0xad/0xc7
   [c0292243] _spin_unlock+0x25/0x3a
   [c01bfb26] _atomic_dec_and_lock+0x22/0x2c
   [c016aeee] mntput_no_expire+0x11/0x5b
   [c0160fc2] link_path_walk+0xa5/0xaf
   [c010492b] restore_nocheck+0x12/0x15
   [c01122d0] do_page_fault+0x0/0x484
   [c0130556] trace_hardirqs_on+0xdd/0xfd
   [c0155b72] kmem_cache_free+0x53/0x5a
   [c0130556] trace_hardirqs_on+0xdd/0xfd
   [c01619e7] __user_walk_fd+0x37/0x3f
   [c016f58a] sys_lsetxattr+0x37/0x4a
   [c010492b] restore_nocheck+0x12/0x15
   [c01122d0] do_page_fault+0x0/0x484
   [c0130556] trace_hardirqs_on+0xdd/0xfd
   [c010492b] restore_nocheck+0x12/0x15
   [c0104842] sysenter_past_esp+0x5f/0xa5
   [] 0x
 
 - #0 (REISERFS_I(inode)-xattr_sem){}:
   [c0131115] __lock_acquire+0x7f9/0xa83
   [c01316f2] lock_acquire+0x4c/0x63
   [e1ac02fa] reiserfs_removexattr+0x42/0xbf [reiserfs]
   [c0291367] down_write+0x17/0x2f
   [e1ac02fa] reiserfs_removexattr+0x42/0xbf [reiserfs]
   [e1ac02fa] reiserfs_removexattr+0x42/0xbf [reiserfs]
   [c016f014] vfs_removexattr+0x67/0xc2
   [c016f0ac] removexattr+0x3d/0x4a
   [c0292243] _spin_unlock+0x25/0x3a
   [c01bfb26] _atomic_dec_and_lock+0x22/0x2c
   [c016aeee] mntput_no_expire+0x11/0x5b
   [c0160fc2] link_path_walk+0xa5/0xaf
   [c010487d] sysenter_past_esp+0x9a/0xa5
   [c0130556] trace_hardirqs_on+0xdd/0xfd
   [c0155b72] kmem_cache_free+0x53/0x5a
   [c0130556] trace_hardirqs_on+0xdd/0xfd
   [c01619e7] __user_walk_fd+0x37/0x3f
   [c016f114] sys_lremovexattr+0x2b/0x3c
   [c010487d] sysenter_past_esp+0x9a/0xa5
   [c0130556] trace_hardirqs_on+0xdd/0xfd
   [c010487d] sysenter_past_esp+0x9a/0xa5
   [c0104842] sysenter_past_esp+0x5f/0xa5
   [] 0x
 
 other info

Re: possible circular locking in reiserfs_removexattr

possible circular locking in reiserfs_removexattr

possible circular locking in reiserfs_removexattr

Re: possible circular locking in reiserfs_removexattr

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