Running a recent git kernel (around 2.6.26-rc5-git4) and the Fedora
ecryptfs-utils-46-0.fc10.x86_64 doing the following:
1) server export a nfs mount /storage
2) mount that on a client at /storage
3) mkdir /storage/encrypted
4) mount -t ecryptfs /storage/encrypted /storage/encrypted
#passphrase
#aes
#32 bytes
(as a side note if you use selinux you may want to add -o
context=system_u:object_r:nfs_t:s0 to that mount command to keep selinux
from fouling things up)
5) touch /storage/encrypted/hello
and I get the following warning:
=======================================================
[ INFO: possible circular locking dependency detected ]
2.6.26-rc5 #103
-------------------------------------------------------
touch/2404 is trying to acquire lock:
(&mount_crypt_stat->global_auth_tok_list_mutex){--..}, at:
[<ffffffffa033bb1c>] ecryptfs_find_global_auth_tok_for_sig+0x30/0x8e [ecryptfs]
but task is already holding lock:
(&crypt_stat->keysig_list_mutex){--..}, at: [<ffffffffa033bbee>]
ecryptfs_generate_key_packet_set+0x74/0xca4 [ecryptfs]
which lock already depends on the new lock.
the existing dependency chain (in reverse order) is:
-> #1 (&crypt_stat->keysig_list_mutex){--..}:
[<ffffffff810566ef>] __lock_acquire+0xa48/0xc25
[<ffffffff81056cc1>] lock_acquire+0x5e/0x77
[<ffffffff812a5268>] mutex_lock_nested+0xf2/0x278
[<ffffffffa033b952>] ecryptfs_add_keysig+0x63/0x84 [ecryptfs]
[<ffffffffa033ad48>] ecryptfs_new_file_context+0x9b/0x1ad [ecryptfs]
[<ffffffffa0336934>] ecryptfs_create+0x1f6/0x2e3 [ecryptfs]
[<ffffffff810b5bd1>] vfs_create+0xdd/0x152
[<ffffffff810b8b7c>] do_filp_open+0x20f/0x881
[<ffffffff810abba0>] do_sys_open+0x51/0xd1
[<ffffffff810abc49>] sys_open+0x1b/0x1d
[<ffffffff8100c090>] tracesys+0xd5/0xda
[<ffffffffffffffff>] 0xffffffffffffffff
-> #0 (&mount_crypt_stat->global_auth_tok_list_mutex){--..}:
[<ffffffff810565f1>] __lock_acquire+0x94a/0xc25
[<ffffffff81056cc1>] lock_acquire+0x5e/0x77
[<ffffffff812a5268>] mutex_lock_nested+0xf2/0x278
[<ffffffffa033bb1c>] ecryptfs_find_global_auth_tok_for_sig+0x30/0x8e
[ecryptfs]
[<ffffffffa033bc57>] ecryptfs_generate_key_packet_set+0xdd/0xca4
[ecryptfs]
[<ffffffffa033abdd>] ecryptfs_write_metadata+0x143/0x213 [ecryptfs]
[<ffffffffa0336963>] ecryptfs_create+0x225/0x2e3 [ecryptfs]
[<ffffffff810b5bd1>] vfs_create+0xdd/0x152
[<ffffffff810b8b7c>] do_filp_open+0x20f/0x881
[<ffffffff810abba0>] do_sys_open+0x51/0xd1
[<ffffffff810abc49>] sys_open+0x1b/0x1d
[<ffffffff8100c090>] tracesys+0xd5/0xda
[<ffffffffffffffff>] 0xffffffffffffffff
other info that might help us debug this:
2 locks held by touch/2404:
#0: (&sb->s_type->i_mutex_key#11){--..}, at: [<ffffffff810b8ab5>]
do_filp_open+0x148/0x881
#1: (&crypt_stat->keysig_list_mutex){--..}, at: [<ffffffffa033bbee>]
ecryptfs_generate_key_packet_set+0x74/0xca4 [ecryptfs]
stack backtrace:
Pid: 2404, comm: touch Not tainted 2.6.26-rc5 #103
Call Trace:
[<ffffffff81054aaa>] print_circular_bug_tail+0x70/0x7b
[<ffffffff810565f1>] __lock_acquire+0x94a/0xc25
[<ffffffff810a5b71>] ? check_bytes_and_report+0x38/0xcb
[<ffffffff81056cc1>] lock_acquire+0x5e/0x77
[<ffffffffa033bb1c>] ?
:ecryptfs:ecryptfs_find_global_auth_tok_for_sig+0x30/0x8e
[<ffffffff812a5268>] mutex_lock_nested+0xf2/0x278
[<ffffffffa033bb1c>] ?
:ecryptfs:ecryptfs_find_global_auth_tok_for_sig+0x30/0x8e
[<ffffffff810a74e7>] ? kmem_cache_alloc+0x7c/0xa7
[<ffffffffa033bb1c>] :ecryptfs:ecryptfs_find_global_auth_tok_for_sig+0x30/0x8e
[<ffffffffa033bc57>] :ecryptfs:ecryptfs_generate_key_packet_set+0xdd/0xca4
[<ffffffff81194ff0>] ? account+0xe0/0xef
[<ffffffff8119513c>] ? extract_entropy+0x4c/0x96
[<ffffffff81080000>] ? add_to_page_cache+0x4/0x9c
[<ffffffffa033abdd>] :ecryptfs:ecryptfs_write_metadata+0x143/0x213
[<ffffffffa0336963>] :ecryptfs:ecryptfs_create+0x225/0x2e3
[<ffffffff81112f00>] ? avc_has_perm+0x4c/0x5e
[<ffffffff81114b53>] ? may_create+0xee/0xfd
[<ffffffff810b5bd1>] vfs_create+0xdd/0x152
[<ffffffff810b8b7c>] do_filp_open+0x20f/0x881
[<ffffffff81011dfb>] ? native_sched_clock+0x50/0x6d
[<ffffffff812a69bb>] ? _spin_unlock+0x26/0x2a
[<ffffffff810abba0>] do_sys_open+0x51/0xd1
[<ffffffff810abc49>] sys_open+0x1b/0x1d
[<ffffffff8100c090>] tracesys+0xd5/0xda
If this is already known/fixed sorry to waste your time...
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