Hiya!
Got this from a 2.6.18rc7-based fedora-devel kernel:
=============================================
[ INFO: possible recursive locking detected ]
2.6.17-1.2647.fc6 #1
---------------------------------------------
sdpd/4955 is trying to acquire lock:
(sk_lock-AF_BLUETOOTH){--..}, at: [<f0cea241>] bt_accept_dequeue+0x26/0xc6
[bluetooth]
but task is already holding lock:
(sk_lock-AF_BLUETOOTH){--..}, at: [<f0b90088>] l2cap_sock_accept+0x41/0x11e
[l2cap]
other info that might help us debug this:
1 lock held by sdpd/4955:
#0: (sk_lock-AF_BLUETOOTH){--..}, at: [<f0b90088>]
l2cap_sock_accept+0x41/0x11e [l2cap]
stack backtrace:
[<c04051ee>] show_trace_log_lvl+0x58/0x171
[<c0405802>] show_trace+0xd/0x10
[<c040591b>] dump_stack+0x19/0x1b
[<c043b9e1>] __lock_acquire+0x778/0x99c
[<c043c176>] lock_acquire+0x4b/0x6d
[<c05b27e3>] lock_sock+0xac/0xbc
[<f0cea241>] bt_accept_dequeue+0x26/0xc6 [bluetooth]
[<f0b90129>] l2cap_sock_accept+0xe2/0x11e [l2cap]
[<c05b1bd7>] sys_accept+0xd8/0x179
[<c05b1d1f>] sys_socketcall+0xa7/0x186
[<c0403faf>] syscall_call+0x7/0xb
DWARF2 unwinder stuck at syscall_call+0x7/0xb
Leftover inexact backtrace:
[<c0405802>] show_trace+0xd/0x10
[<c040591b>] dump_stack+0x19/0x1b
[<c043b9e1>] __lock_acquire+0x778/0x99c
[<c043c176>] lock_acquire+0x4b/0x6d
[<c05b27e3>] lock_sock+0xac/0xbc
[<f0cea241>] bt_accept_dequeue+0x26/0xc6 [bluetooth]
[<f0b90129>] l2cap_sock_accept+0xe2/0x11e [l2cap]
[<c05b1bd7>] sys_accept+0xd8/0x179
[<c05b1d1f>] sys_socketcall+0xa7/0x186
[<c0403faf>] syscall_call+0x7/0xb
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