Return-Path: X-Spam-Checker-Version: SpamAssassin 3.1.8 (2007-02-13) on gelk.kernelslacker.org X-Spam-Level: X-Spam-Status: No, score=-1.8 required=5.0 tests=AWL,BAYES_00,NO_REAL_NAME, UNPARSEABLE_RELAY autolearn=no version=3.1.8 Received: from pobox.devel.redhat.com [10.11.255.8] by gelk.kernelslacker.org with IMAP (fetchmail-6.3.6) for (single-drop); Tue, 27 Mar 2007 09:45:54 -0400 (EDT) Received: from pobox.devel.redhat.com ([unix socket]) by pobox.devel.redhat.com (Cyrus v2.2.12-Invoca-RPM-2.2.12-3.RHEL4.1) with LMTPA; Tue, 27 Mar 2007 09:45:05 -0400 X-Sieve: CMU Sieve 2.2 Received: from int-mx1.corp.redhat.com (int-mx1.corp.redhat.com [172.16.52.254]) by pobox.devel.redhat.com (8.13.1/8.13.1) with ESMTP id l2RDj50L028858; Tue, 27 Mar 2007 09:45:05 -0400 Received: from post-office.corp.redhat.com (post-office.corp.redhat.com [172.16.52.227]) by int-mx1.corp.redhat.com (8.13.1/8.13.1) with ESMTP id l2RDj391021813; Tue, 27 Mar 2007 09:45:04 -0400 Received: from post-office.corp.redhat.com (localhost.localdomain [127.0.0.1]) by post-office.corp.redhat.com (8.12.11.20060308/8.11.6) with ESMTP id l2RDj3ne029910; Tue, 27 Mar 2007 09:45:03 -0400 Received: from int-mx1.corp.redhat.com (int-mx1.corp.redhat.com [172.16.52.254]) by post-office.corp.redhat.com (8.12.11.20060308/8.11.6) with ESMTP id l2RDi7gL029593 for ; Tue, 27 Mar 2007 09:44:07 -0400 Received: from mx1.redhat.com (mx1.redhat.com [172.16.48.31]) by int-mx1.corp.redhat.com (8.13.1/8.13.1) with ESMTP id l2RDi7Cl021287 for ; Tue, 27 Mar 2007 09:44:07 -0400 Received: from bugzilla.redhat.com (bugzilla.redhat.com [172.16.48.198]) by mx1.redhat.com (8.13.1/8.13.1) with ESMTP id l2RDi6Dd012865 for ; Tue, 27 Mar 2007 09:44:06 -0400 Received: from bugzilla.redhat.com (localhost.localdomain [127.0.0.1]) by bugzilla.redhat.com (8.13.1/8.13.1) with ESMTP id l2RDi6NG013662 for ; Tue, 27 Mar 2007 09:44:06 -0400 Received: (from apache@localhost) by bugzilla.redhat.com (8.13.1/8.13.1/Submit) id l2RDi6Ti013661; Tue, 27 Mar 2007 09:44:06 -0400 From: bugzilla@redhat.com To: kernel-maint@redhat.com Subject: [Bug 234140] New: possible circular locking dependency detected Content-type: text/plain; charset=utf-8 Message-ID: X-Loop: bugzilla@redhat.com X-BeenThere: bugzilla@redhat.com X-Bugzilla-Product: Fedora Core X-Bugzilla-Version: devel X-Bugzilla-Component: kernel X-Bugzilla-Status: NEW X-Bugzilla-Comment: Public X-Bugzilla-Reason: AssignedTo X-Bugzilla-Changed-Fields: New Sender: kernel-maint-admin@redhat.com Errors-To: kernel-maint-admin@redhat.com X-BeenThere: kernel-maint@redhat.com X-Mailman-Version: 2.0.13 Precedence: bulk List-Help: List-Post: List-Subscribe: , List-Id: List-Unsubscribe: , List-Archive: Date: Tue, 27 Mar 2007 09:44:06 -0400 Please do not reply directly to this email. All additional comments should be made in the comments box of this bug report. https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=234140 Summary: possible circular locking dependency detected Product: Fedora Core Version: devel Platform: x86_64 OS/Version: Linux Status: NEW Severity: medium Priority: medium Component: kernel AssignedTo: kernel-maint@redhat.com ReportedBy: greenrd@greenrd.org QAContact: bbrock@redhat.com Description of problem: I got the "possible circular locking dependency detected" message in my /var/log/messages, as shown in this excerpt: Mar 25 21:14:57 greenrd sshd(pam_unix)[28494]: session opened for user greenrd by (uid=0) Mar 25 21:15:10 greenrd kernel: Mar 25 21:15:10 greenrd kernel: ======================================================= Mar 25 21:15:10 greenrd kernel: [ INFO: possible circular locking dependency detected ] Mar 25 21:15:10 greenrd kernel: 2.6.20-1.3017.fc7 #1 Mar 25 21:15:10 greenrd kernel: ------------------------------------------------------- Mar 25 21:15:10 greenrd kernel: kdesktop/28739 is trying to acquire lock: Mar 25 21:15:10 greenrd kernel: (&inode->i_mutex){--..}, at: [] mutex_lock+0x2a/0x2e Mar 25 21:15:10 greenrd kernel: Mar 25 21:15:10 greenrd kernel: but task is already holding lock: Mar 25 21:15:10 greenrd kernel: (&mm->mmap_sem){----}, at: [] sys_mmap+0x73/0x119 Mar 25 21:15:10 greenrd kernel: Mar 25 21:15:10 greenrd kernel: which lock already depends on the new lock. Mar 25 21:15:10 greenrd kernel: Mar 25 21:15:10 greenrd kernel: Mar 25 21:15:10 greenrd kernel: the existing dependency chain (in reverse order) is: Mar 25 21:15:10 greenrd kernel: Mar 25 21:15:10 greenrd kernel: -> #1 (&mm->mmap_sem){----}: Mar 25 21:15:10 greenrd kernel: [] __lock_acquire+0xa27/0xbd1 Mar 25 21:15:10 greenrd kernel: [] lock_acquire+0x4c/0x65 Mar 25 21:15:10 greenrd kernel: [] do_page_fault+0x3b5/0x7ed Mar 25 21:15:10 greenrd kernel: [] down_read+0x3e/0x4a Mar 25 21:15:10 greenrd kernel: [] do_page_fault+0x3b5/0x7ed Mar 25 21:15:10 greenrd kernel: [] __mutex_lock_slowpath+0x280/0x299 Mar 25 21:15:10 greenrd kernel: [] mark_held_locks+0x53/0x7a Mar 25 21:15:10 greenrd kernel: [] __mutex_lock_slowpath+0x280/0x299 Mar 25 21:15:10 greenrd kernel: [] error_exit+0x0/0x96 Mar 25 21:15:10 greenrd kernel: [] pipe_read+0x106/0x374 Mar 25 21:15:10 greenrd kernel: [] pipe_read+0xcd/0x374 Mar 25 21:15:10 greenrd kernel: [] do_sync_read+0xe2/0x126 Mar 25 21:15:10 greenrd kernel: [] autoremove_wake_function+0x0/0x38 Mar 25 21:15:10 greenrd kernel: [] audit_syscall_entry+0x148/0x17e Mar 25 21:15:10 greenrd kernel: [] vfs_read+0xcc/0x175 Mar 25 21:15:10 greenrd kernel: [] sys_read+0x47/0x6f Mar 25 21:15:10 greenrd kernel: [] tracesys+0xdc/0xe1 Mar 25 21:15:10 greenrd kernel: [] 0xffffffffffffffff Mar 25 21:15:10 greenrd kernel: Mar 25 21:15:10 greenrd kernel: -> #0 (&inode->i_mutex){--..}: Mar 25 21:15:10 greenrd kernel: [] __lock_acquire+0x91f/0xbd1 Mar 25 21:15:10 greenrd kernel: [] lock_acquire+0x4c/0x65 Mar 25 21:15:10 greenrd kernel: [] mutex_lock+0x2a/0x2e Mar 25 21:15:10 greenrd kernel: [] __mutex_lock_slowpath+0xff/0x299 Mar 25 21:15:10 greenrd kernel: [] do_mmap_pgoff+0x45b/0x7fa Mar 25 21:15:10 greenrd kernel: [] mutex_lock+0x2a/0x2e Mar 25 21:15:10 greenrd kernel: [] nfs_revalidate_mapping+0x6d/0xac [nfs] Mar 25 21:15:10 greenrd kernel: [] nfs_file_mmap+0x4d/0x65 [nfs] Mar 25 21:15:10 greenrd kernel: [] do_mmap_pgoff+0x4fd/0x7fa Mar 25 21:15:10 greenrd kernel: [] trace_hardirqs_on+0x136/0x15a Mar 25 21:15:10 greenrd kernel: [] sys_mmap+0x90/0x119 Mar 25 21:15:10 greenrd kernel: [] tracesys+0xdc/0xe1 Mar 25 21:15:10 greenrd kernel: [] 0xffffffffffffffff Mar 25 21:15:10 greenrd kernel: Mar 25 21:15:10 greenrd kernel: other info that might help us debug this: Mar 25 21:15:10 greenrd kernel: Mar 25 21:15:10 greenrd kernel: 1 lock held by kdesktop/28739: Mar 25 21:15:10 greenrd kernel: #0: (&mm->mmap_sem){----}, at: [] sys_mmap+0x73/0x119 Mar 25 21:15:10 greenrd kernel: Mar 25 21:15:10 greenrd kernel: stack backtrace: Mar 25 21:15:10 greenrd kernel: Mar 25 21:15:10 greenrd kernel: Call Trace: Mar 25 21:15:10 greenrd kernel: [] print_circular_bug_tail+0x70/0x7b Mar 25 21:15:10 greenrd kernel: [] __lock_acquire+0x91f/0xbd1 Mar 25 21:15:10 greenrd kernel: [] lock_acquire+0x4c/0x65 Mar 25 21:15:10 greenrd kernel: [] mutex_lock+0x2a/0x2e Mar 25 21:15:10 greenrd kernel: [] __mutex_lock_slowpath+0xff/0x299 Mar 25 21:15:10 greenrd kernel: [] do_mmap_pgoff+0x45b/0x7fa Mar 25 21:15:10 greenrd kernel: [] mutex_lock+0x2a/0x2e Mar 25 21:15:10 greenrd kernel: [] :nfs:nfs_revalidate_mapping+0x6d/0xac Mar 25 21:15:10 greenrd kernel: [] :nfs:nfs_file_mmap+0x4d/0x65 Mar 25 21:15:10 greenrd kernel: [] do_mmap_pgoff+0x4fd/0x7fa Mar 25 21:15:10 greenrd kernel: [] trace_hardirqs_on+0x136/0x15a Mar 25 21:15:10 greenrd kernel: [] sys_mmap+0x90/0x119 Mar 25 21:15:10 greenrd kernel: [] tracesys+0xdc/0xe1 Mar 25 21:15:10 greenrd kernel: Version-Release number of selected component (if applicable): kernel-2.6.20-1.3017.fc7 How to reproduce: No idea -- Configure bugmail: https://bugzilla.redhat.com/bugzilla/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are the assignee for the bug, or are watching the assignee.