abrt version: 2.0.5 cmdline: initrd=initrd0.img root=live:UUID=a6418d53-10fe-4d0e-8f78-3f676e886c09 rootfstype=ext4 ro liveimg LANG=de_DE.utf8 quiet rhgb rd.luks=0 rd.md=0 rd.dm=0 BOOT_IMAGE=vmlinuz0 comment: booted from f16 alpha rc4 kernel: undefined reason: [ INFO: possible recursive locking detected ] smolt_data: Unable to save UUID to /etc/smolt/hw-uuid. Please run once as root. time: Tue Aug 16 16:40:24 2011 backtrace: :[ INFO: possible recursive locking detected ] :3.0.0-1.fc16.x86_64 #1 :--------------------------------------------- :systemd-logind/866 is trying to acquire lock: : (&ep->mtx){+.+.+.}, at: [<ffffffff8116ee12>] ep_scan_ready_list+0x3a/0x19f :but task is already holding lock: : (&ep->mtx){+.+.+.}, at: [<ffffffff8116f38c>] sys_epoll_ctl+0x120/0x51d :other info that might help us debug this: : Possible unsafe locking scenario: : CPU0 : ---- : lock(&ep->mtx); : lock(&ep->mtx); : *** DEADLOCK *** : May be due to missing lock nesting notation :2 locks held by systemd-logind/866: : #0: (epmutex){+.+.+.}, at: [<ffffffff8116f344>] sys_epoll_ctl+0xd8/0x51d : #1: (&ep->mtx){+.+.+.}, at: [<ffffffff8116f38c>] sys_epoll_ctl+0x120/0x51d :stack backtrace: :Pid: 866, comm: systemd-logind Not tainted 3.0.0-1.fc16.x86_64 #1 :Call Trace: : [<ffffffff8108a375>] __lock_acquire+0x917/0xcf7 : [<ffffffff8100af3a>] ? dump_trace+0x2fe/0x30d : [<ffffffff8100e9fd>] ? paravirt_read_tsc+0x9/0xd : [<ffffffff8116ee12>] ? ep_scan_ready_list+0x3a/0x19f : [<ffffffff8108abe2>] lock_acquire+0xbf/0x103 : [<ffffffff8116ee12>] ? ep_scan_ready_list+0x3a/0x19f : [<ffffffff81087ea6>] ? save_trace+0x3d/0xa7 : [<ffffffff8116ee12>] ? ep_scan_ready_list+0x3a/0x19f : [<ffffffff8116e8bf>] ? ep_remove+0xb4/0xb4 : [<ffffffff814dc8f2>] __mutex_lock_common+0x4c/0x361 : [<ffffffff8116ee12>] ? ep_scan_ready_list+0x3a/0x19f : [<ffffffff8100e9fd>] ? paravirt_read_tsc+0x9/0xd : [<ffffffff8100eec7>] ? native_sched_clock+0x34/0x36 : [<ffffffff8100eed2>] ? sched_clock+0x9/0xd : [<ffffffff8108986b>] ? mark_lock+0x2d/0x220 : [<ffffffff8116e8bf>] ? ep_remove+0xb4/0xb4 : [<ffffffff814dcd16>] mutex_lock_nested+0x40/0x45 : [<ffffffff8116ee12>] ep_scan_ready_list+0x3a/0x19f : [<ffffffff8116ef77>] ? ep_scan_ready_list+0x19f/0x19f : [<ffffffff8116ef8e>] ep_poll_readyevents_proc+0x17/0x19 : [<ffffffff8116eb9d>] ep_call_nested.constprop.3+0x90/0xcc : [<ffffffff8116ecc2>] ep_eventpoll_poll+0x4e/0x5d : [<ffffffff8116f49e>] sys_epoll_ctl+0x232/0x51d : [<ffffffff8116ea58>] ? ep_set_mstimeout+0x49/0x49 : [<ffffffff814e4fc2>] system_call_fastpath+0x16/0x1b
This is fixed in *** This bug has been marked as a duplicate of bug 722472 ***