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Description of problem: I use RHEL5.4 with ocfs2 at two node. panic occurs in one node. and paniced in spin_lock_irq() according to vmcore. Unable to handle kernel NULL pointer dereference at 0000000000000808 RIP: [<ffffffff80064ae6>] _spin_lock_irq+0x1/0xb PGD 187e15067 PUD 187e16067 PMD 0 Oops: 0002 [1] SMP last sysfs file: /devices/pci0000:00/0000:00:09.0/0000:06:00.0/0000:07:00.0/irq CPU 1 Modules linked in: mptctl mptbase softdog autofs4 ipmi_devintf ipmi_si ipmi_msghandler ocfs2(U) ocfs2_dlmfs(U) ocfs2_dlm(U) ocfs2_nodemanager(U) configfs drbd(U) bonding ipv6 xfrm_nalgo crypto_api bnx2i(U) libiscsi2 scsi_transport_iscsi2 scsi_transport_iscsi cnic(U) dm_mirror dm_multipath scsi_dh video hwmon backlight sbs i2c_ec i2c_core button battery asus_acpi acpi_memhotplug ac parport_pc lp parport joydev sr_mod cdrom sg pcspkr serio_raw hpilo bnx2(U) dm_raid45 dm_message dm_region_hash dm_log dm_mod dm_mem_cache hpahcisr(PU) ata_piix libata shpchp cciss sd_mod scsi_mod ext3 jbd uhci_hcd ohci_hcd ehci_hcd Pid: 21924, comm: res Tainted: P 2.6.18-164.el5 #1 RIP: 0010:[<ffffffff80064ae6>] [<ffffffff80064ae6>] _spin_lock_irq+0x1/0xb RSP: 0018:ffff81008b1cfae0 EFLAGS: 00010002 RAX: ffff810187af4040 RBX: 0000000000000000 RCX: ffff8101342b7b80 RDX: ffff81008b1cfb98 RSI: ffff81008b1cfba8 RDI: 0000000000000808 RBP: ffff81008b1cfb98 R08: 0000000000000000 R09: 0000000000000000 R10: ffff810075463090 R11: ffffffff88595b95 R12: ffff81008b1cfba8 R13: ffff81007f070520 R14: 0000000000000001 R15: ffff81008b1cfce8 FS: 0000000000000000(0000) GS:ffff810105d51840(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b CR2: 0000000000000808 CR3: 0000000187e14000 CR4: 00000000000006e0 Process res (pid: 21924, threadinfo ffff81008b1ce000, task ffff810187af4040) Stack: ffffffff8001db30 ffff81007f070520 ffffffff885961f3 ffff810105d39400 ffffffff88596323 06ff813231393234 ffff810075463018 ffff810075463018 0000000000000297 ffff81007f070520 ffff810075463028 0000000000000246 Call Trace: [<ffffffff8001db30>] sigprocmask+0x28/0xdb [<ffffffff885961f3>] :ocfs2:ocfs2_delete_inode+0x0/0x1691 [<ffffffff88596323>] :ocfs2:ocfs2_delete_inode+0x130/0x1691 [<ffffffff88581f16>] :ocfs2:ocfs2_drop_lock+0x67a/0x77b [<ffffffff8858026a>] :ocfs2:ocfs2_remove_lockres_tracking+0x10/0x45 [<ffffffff885961f3>] :ocfs2:ocfs2_delete_inode+0x0/0x1691 [<ffffffff8002f49e>] generic_delete_inode+0xc6/0x143 [<ffffffff88595c85>] :ocfs2:ocfs2_drop_inode+0xf0/0x161 [<ffffffff8000d46e>] dput+0xf6/0x114 [<ffffffff800e9c44>] prune_one_dentry+0x66/0x76 [<ffffffff8002e958>] prune_dcache+0x10f/0x149 [<ffffffff8004d66e>] shrink_dcache_parent+0x1c/0xe1 [<ffffffff80104f8b>] proc_flush_task+0x17c/0x1f6 [<ffffffff8008fa2c>] sched_exit+0x27/0xb5 [<ffffffff80018024>] release_task+0x387/0x3cb [<ffffffff80015c50>] do_exit+0x865/0x911 [<ffffffff80049281>] cpuset_exit+0x0/0x88 [<ffffffff8002b080>] get_signal_to_deliver+0x42c/0x45a [<ffffffff8005ae7b>] do_notify_resume+0x9c/0x7af [<ffffffff8008b6a2>] deactivate_task+0x28/0x5f [<ffffffff80021f3f>] __up_read+0x19/0x7f [<ffffffff80066b58>] do_page_fault+0x4fe/0x830 [<ffffffff800b65b2>] audit_syscall_exit+0x336/0x362 [<ffffffff8005d32e>] int_signal+0x12/0x17 Code: f0 ff 0f 0f 88 f3 00 00 00 c3 53 48 89 fb e8 33 f5 02 00 f0 RIP [<ffffffff80064ae6>] _spin_lock_irq+0x1/0xb RSP <ffff81008b1cfae0> crash> bt PID: 21924 TASK: ffff810187af4040 CPU: 1 COMMAND: "res" #0 [ffff81008b1cf840] crash_kexec at ffffffff800ac5b9 #1 [ffff81008b1cf900] __die at ffffffff80065127 #2 [ffff81008b1cf940] do_page_fault at ffffffff80066da7 #3 [ffff81008b1cfa30] error_exit at ffffffff8005dde9 [exception RIP: _spin_lock_irq+1] RIP: ffffffff80064ae6 RSP: ffff81008b1cfae0 RFLAGS: 00010002 RAX: ffff810187af4040 RBX: 0000000000000000 RCX: ffff8101342b7b80 RDX: ffff81008b1cfb98 RSI: ffff81008b1cfba8 RDI: 0000000000000808 RBP: ffff81008b1cfb98 R8: 0000000000000000 R9: 0000000000000000 R10: ffff810075463090 R11: ffffffff88595b95 R12: ffff81008b1cfba8 R13: ffff81007f070520 R14: 0000000000000001 R15: ffff81008b1cfce8 ORIG_RAX: ffffffffffffffff CS: 0010 SS: 0018 #4 [ffff81008b1cfae0] sigprocmask at ffffffff8001db30 #5 [ffff81008b1cfb00] ocfs2_delete_inode at ffffffff88596323 #6 [ffff81008b1cfbf0] generic_delete_inode at ffffffff8002f49e #7 [ffff81008b1cfc10] ocfs2_drop_inode at ffffffff88595c85 #8 [ffff81008b1cfc30] dput at ffffffff8000d46e #9 [ffff81008b1cfc50] prune_one_dentry at ffffffff800e9c44 #10 [ffff81008b1cfc70] prune_dcache at ffffffff8002e958 #11 [ffff81008b1cfca0] shrink_dcache_parent at ffffffff8004d66e #12 [ffff81008b1cfcd0] proc_flush_task at ffffffff80104f8b #13 [ffff81008b1cfd30] release_task at ffffffff80018024 #14 [ffff81008b1cfd60] do_exit at ffffffff80015c50 #15 [ffff81008b1cfdc0] get_signal_to_deliver at ffffffff8002b080 #16 [ffff81008b1cfe00] do_notify_resume at ffffffff8005ae7b #17 [ffff81008b1cff50] int_signal at ffffffff8005d32e RIP: 0000003e4becced2 RSP: 000000004124afd0 RFLAGS: 00000202 RAX: fffffffffffffdfe RBX: 0000000000000000 RCX: ffffffffffffffff RDX: 0000000000000000 RSI: 000000004124b040 RDI: 0000000000000006 RBP: 000000004124b0e0 R8: 000000004124b110 R9: 00000000000055a4 R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000000 R13: 000000004124c000 R14: 000000004124b940 R15: 0000000000001000 ORIG_RAX: 0000000000000017 CS: 0033 SS: 002b Version-Release number of selected component (if applicable): kernel-2.6.18-164.el5 How reproducible: None
This is a dup of bug #608962 which was CLOSED WONTFIX because this problem only seems to occur with ocfs2, which is not supported by Red Hat.
Doesn't this problem arise except OCFS2 ?
It has only been reported by customers using ocfs2, at least.
This bug/component is not included in scope for RHEL-5.11.0 which is the last RHEL5 minor release. This Bugzilla will soon be CLOSED as WONTFIX (at the end of RHEL5.11 development phase (Apr 22, 2014)). Please contact your account manager or support representative in case you need to escalate this bug.
Thank you for submitting this request for inclusion in Red Hat Enterprise Linux 5. We've carefully evaluated the request, but are unable to include it in RHEL5 stream. If the issue is critical for your business, please provide additional business justification through the appropriate support channels (https://access.redhat.com/site/support).