Bug 724952

Summary: [abrt] kernel: [ INFO: possible recursive locking detected ]
Product: [Fedora] Fedora Reporter: Mads Kiilerich <mads>
Component: kernelAssignee: Kernel Maintainer List <kernel-maint>
Status: CLOSED DUPLICATE QA Contact: Fedora Extras Quality Assurance <extras-qa>
Severity: unspecified Docs Contact:
Priority: unspecified    
Version: rawhideCC: aquini, gansalmon, itamar, jonathan, kernel-maint, madhu.chinakonda, mschmidt
Target Milestone: ---   
Target Release: ---   
Hardware: i686   
OS: Unspecified   
Whiteboard: abrt_hash:9287dba136957e3ec176e1032f7ad8b9857ad3df
Fixed In Version: Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2011-07-22 15:06:28 UTC Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:

Description Mads Kiilerich 2011-07-22 12:15:02 UTC 
abrt version: 2.0.3
cmdline:        ro root=/dev/mapper/VolGroup-lv_root16 rd_LVM_LV=VolGroup/lv_root16 rd_LVM_LV=VolGroup/lv_swap rd_NO_LUKS rd_NO_MD rd_NO_DM LANG=en_US.UTF-8 SYSFONT=latarcyrheb-sun16 KEYTABLE=us rhgb quiet
comment:        happens on boot
kernel:         undefined
reason:         [ INFO: possible recursive locking detected ]
time:           Fri Jul 22 14:12:07 2011

backtrace:
:[ INFO: possible recursive locking detected ]
:3.0-0.rc7.git3.1.fc16.i686.PAE #1
:---------------------------------------------
:systemd-logind/846 is trying to acquire lock:
: (&ep->mtx){+.+.+.}, at: [<c0533965>] ep_scan_ready_list+0x32/0x154
:but task is already holding lock:
: (&ep->mtx){+.+.+.}, at: [<c0533e04>] sys_epoll_ctl+0x103/0x481
: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/846:
: #0:  (epmutex){+.+.+.}, at: [<c0533dbf>] sys_epoll_ctl+0xbe/0x481
: #1:  (&ep->mtx){+.+.+.}, at: [<c0533e04>] sys_epoll_ctl+0x103/0x481
:stack backtrace:
:Pid: 846, comm: systemd-logind Not tainted 3.0-0.rc7.git3.1.fc16.i686.PAE #1
:Call Trace:
: [<c085e219>] ? printk+0x2d/0x2f
: [<c0472eab>] __lock_acquire+0x805/0xb57
: [<c040e02b>] ? sched_clock+0x8/0xb
: [<c0464d58>] ? sched_clock_local+0x10/0x18b
: [<c0533965>] ? ep_scan_ready_list+0x32/0x154
: [<c0473611>] lock_acquire+0xad/0xe4
: [<c0533965>] ? ep_scan_ready_list+0x32/0x154
: [<c0865ae5>] __mutex_lock_common+0x49/0x2ee
: [<c0533965>] ? ep_scan_ready_list+0x32/0x154
: [<c043a71c>] ? __might_sleep+0x29/0xfb
: [<c04724da>] ? mark_lock+0x26/0x1f2
: [<c0865ea4>] mutex_lock_nested+0x43/0x49
: [<c0533965>] ? ep_scan_ready_list+0x32/0x154
: [<c0533965>] ep_scan_ready_list+0x32/0x154
: [<c053353f>] ? ep_remove+0x9b/0x9b
: [<c0533a9b>] ep_poll_readyevents_proc+0x14/0x16
: [<c053374a>] ep_call_nested.constprop.2+0x6d/0x9a
: [<c0533a87>] ? ep_scan_ready_list+0x154/0x154
: [<c0533846>] ep_eventpoll_poll+0x45/0x55
: [<c0533f00>] sys_epoll_ctl+0x1ff/0x481
: [<c053366f>] ? ep_send_events_proc+0xd5/0xd5
: [<c086d49f>] sysenter_do_call+0x12/0x38
Comment 1 Michal Schmidt 2011-07-22 15:06:28 UTC 

*** This bug has been marked as a duplicate of bug 722472 ***