Red Hat Bugzilla – Bug 846048
Kernel panic on BUG in dcache.h, triggered by "df"
Last modified: 2014-12-15 13:26:38 EST
Description of problem: Two of our machines have been experiencing kernel panics every 9-10 days in dcache.h. Both machines mount filesystems via NFSv4 from OpenSolaris and OpenIndiana systems, but I do not know if this is related. Version-Release number of selected component (if applicable): 2.6.18-308.11.1.el5 How reproducible: It's happened three times on once machine and twice on the other, but I do not yet have a way to reproduce it at will. Additional info: System info, backtrace, and log from crash(8): KERNEL: /usr/lib/debug/lib/modules/2.6.18-308.11.1.el5/vmlinux DUMPFILE: vmcore [PARTIAL DUMP] CPUS: 2 DATE: Sun Aug 5 16:46:39 2012 UPTIME: 9 days, 03:19:28 LOAD AVERAGE: 1.09, 1.04, 1.01 TASKS: 202 NODENAME: dryas.ling.washington.edu RELEASE: 2.6.18-308.11.1.el5 VERSION: #1 SMP Fri Jun 15 15:41:53 EDT 2012 MACHINE: x86_64 (2205 Mhz) MEMORY: 7.9 GB PANIC: "" PID: 10391 COMMAND: "df" TASK: ffff81013fb3c860 [THREAD_INFO: ffff810139c3e000] CPU: 1 STATE: TASK_RUNNING (PANIC) crash> bt PID: 10391 TASK: ffff81013fb3c860 CPU: 1 COMMAND: "df" #0 [ffff810139c3fa90] crash_kexec at ffffffff800b09ac #1 [ffff810139c3fb50] __die at ffffffff80065137 #2 [ffff810139c3fb90] die at ffffffff8006c789 #3 [ffff810139c3fbc0] do_invalid_op at ffffffff8006cd49 #4 [ffff810139c3fc80] error_exit at ffffffff8005dde9 [exception RIP: __link_path_walk+2387] RIP: ffffffff8000a202 RSP: ffff810139c3fd38 RFLAGS: 00010246 RAX: 0000000000000000 RBX: ffff810139c3fe48 RCX: 0000000000017c88 RDX: ffff8101349d78e8 RSI: ffff8101c6003000 RDI: ffffffff80458580 RBP: ffff8102328351c0 R8: 0000000000000001 R9: ffff8101438d7640 R10: 0000000000000001 R11: ffffffff8002c578 R12: ffff8100b5bea3d8 R13: 0000000000000000 R14: ffff8101c6003002 R15: 0000000000000002 ORIG_RAX: ffffffffffffffff CS: 0010 SS: 0018 #5 [ffff810139c3fda0] link_path_walk at ffffffff8000eb23 #6 [ffff810139c3fdd0] do_path_lookup at ffffffff8000cdf6 #7 [ffff810139c3fe10] __user_walk_fd at ffffffff800239f8 #8 [ffff810139c3fe40] vfs_stat_fd at ffffffff80028973 #9 [ffff810139c3fef0] sys_newstat at ffffffff80023728 #10 [ffff810139c3ff80] tracesys at ffffffff8005d28d (via system_call) RIP: 0000003667cc4485 RSP: 00007fff97f2ec88 RFLAGS: 00000246 RAX: ffffffffffffffda RBX: ffffffff8005d28d RCX: ffffffffffffffff RDX: 00007fff97f2ec90 RSI: 00007fff97f2ec90 RDI: 0000000000406be9 RBP: 00007fff97f2edf0 R8: 0000000000000000 R9: 0000000009464acd R10: 0000000000000000 R11: 0000000000000246 R12: 00007fff97f2ec90 R13: 00007fff97f2ed20 R14: 00007fff97f2edb0 R15: 0000000000000002 ORIG_RAX: 0000000000000004 CS: 0033 SS: 002b crash> log Linux version 2.6.18-308.11.1.el5 (mockbuild@hs20-bc2-3.build.redhat.com) (gcc version 4.1.2 20080704 (Red Hat 4.1.2-52)) #1 SMP Fri Jun 15 15:41:53 EDT 2012 Command line: ro root=LABEL=/ rhgb quiet crashkernel=128M@16M [...trimmed...] ----------- [cut here ] --------- [please bite here ] --------- Kernel BUG at include/linux/dcache.h:340 invalid opcode: 0000 [1] SMP last sysfs file: /devices/pci0000:00/0000:00:19.3/temp1_input CPU 1 Modules linked in: nfsd exportfs auth_rpcgss autofs4 hidp ip6table_filter ip6_tables iptable_raw xt_policy xt_multiport ipt_ULOG ipt_TTL ipt_ttl ipt_TOS ipt_tos ipt_TCPMSS ipt_SAME ipt_REJECT ipt_REDIRECT ipt_recent ipt_owner ipt_NETMAP ipt_MASQUERADE ipt_LOG ipt_iprange ipt_hashlimit ipt_ECN ipt_ecn ipt_DSCP ipt_dscp ipt_CLUSTERIP ipt_ah ipt_addrtype ip_nat_tftp ip_nat_snmp_basic ip_nat_pptp ip_nat_irc ip_nat_ftp ip_nat_amanda ip_conntrack_tftp ip_conntrack_pptp ip_conntrack_netbios_ns ip_conntrack_irc ip_conntrack_ftp ts_kmp ip_conntrack_amanda xt_tcpmss xt_pkttype xt_physdev bridge xt_NFQUEUE xt_MARK xt_mark xt_mac xt_limit xt_length xt_helper xt_dccp xt_conntrack xt_CONNMARK xt_connmark xt_CLASSIFY xt_tcpudp xt_state iptable_nat ip_nat ip_conntrack iptable_mangle nfnetlink iptable_filter ip_tables x_tables nfs nfs_acl rfcomm l2cap bluetooth lockd sunrpc be2iscsi ib_iser rdma_cm ib_cm iw_cm ib_sa ib_mad ib_core ib_addr iscsi_tcp bnx2i cnic ipv6 xfrm_nalgo crypto_api uio cxgb3i libcxgbi cxgb3 8021q libiscsi_tcp libiscsi2 scsi_transport_iscsi2 scsi_transport_iscsi cpufreq_ondemand powernow_k8 freq_table mperf dm_mirror dm_multipath scsi_dh video backlight sbs power_meter i2c_ec dell_wmi wmi button battery asus_acpi acpi_memhotplug ac lp sg floppy pcspkr tg3 parport_pc k8_edac k8temp parport edac_mc hwmon ide_cd i2c_amd8111 tpm_tis tpm cdrom serio_raw tpm_bios i2c_amd756 i2c_core amd_rng dm_raid45 dm_message dm_region_hash dm_log dm_mod dm_mem_cache sata_mv libata shpchp 3w_xxxx sd_mod scsi_mod ext3 jbd uhci_hcd ohci_hcd ehci_hcd Pid: 10391, comm: df Not tainted 2.6.18-308.11.1.el5 #1 RIP: 0010:[<ffffffff8000a202>] [<ffffffff8000a202>] __link_path_walk+0x953/0xf25 RSP: 0018:ffff810139c3fd38 EFLAGS: 00010246 RAX: 0000000000000000 RBX: ffff810139c3fe48 RCX: 0000000000017c88 RDX: ffff8101349d78e8 RSI: ffff8101c6003000 RDI: ffffffff80458580 RBP: ffff8102328351c0 R08: 0000000000000001 R09: ffff8101438d7640 R10: 0000000000000001 R11: ffffffff8002c578 R12: ffff8100b5bea3d8 R13: 0000000000000000 R14: ffff8101c6003002 R15: 0000000000000002 FS: 00002b3e6e9a8af0(0000) GS:ffff810143906a40(0000) knlGS:00000000f78b7b90 CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b CR2: 0000000007238038 CR3: 0000000158964000 CR4: 00000000000006e0 Process df (pid: 10391, threadinfo ffff810139c3e000, task ffff81013fb3c860) Stack: ffff810139c3fde8 0000000100000000 0000000200017c88 ffff8101c6003000 ffff8102312cb760 0000000000000000 ffff810139c3fed8 ffff8100b5bea3d8 ffff810139c3fe48 ffff810104696980 0000000000000001 ffff8101c6003000 Call Trace: [<ffffffff8000eb23>] link_path_walk+0x45/0xb8 [<ffffffff8000cdf6>] do_path_lookup+0x294/0x310 [<ffffffff80012955>] getname+0x15b/0x1c2 [<ffffffff800239f8>] __user_walk_fd+0x37/0x4c [<ffffffff80028973>] vfs_stat_fd+0x1b/0x4a [<ffffffff8000d543>] dput+0x2c/0x114 [<ffffffff8002cafd>] mntput_no_expire+0x19/0x89 [<ffffffff800471f6>] sys_chdir+0x55/0x62 [<ffffffff80023728>] sys_newstat+0x19/0x31 [<ffffffff8005d229>] tracesys+0x71/0xe0 [<ffffffff8005d28d>] tracesys+0xd5/0xe0 Code: 0f 0b 68 80 bb 2b 80 c2 54 01 eb fe f0 ff 02 48 89 13 c7 05 RIP [<ffffffff8000a202>] __link_path_walk+0x953/0xf25 RSP <ffff810139c3fd38>
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).
Dummy comment so Bugzilla will stop telling me I have an outstanding Needinfo request.