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Kernel Crashes with "symev_rh_ES_6_2_6_32_431_el6_x86_64" (Doc ID 2488043.1)

Last updated on JUNE 02, 2020

Applies to:

Linux OS - Version Oracle Linux 6.0 and later
Linux x86-64

Symptoms


Oracle Linux 6 server gets kernel panic on 3rd-party kernel module symev_rh_ES_6_2_6_32_431_el6_x86_64:

BUG: unable to handle kernel paging request at ffffffffa0a3d603
IP: [] strnlen+0x9/0x40
Kernel PGD 1a91067 PUD 1a95063 PMD 19b12c0067 PTE 0
User PGD 407ff62067 PUD 407ff6d067 PMD 0
Oops: 0000 [#1] SMP
last sysfs file: /sys/devices/system/cpu/online
CPU 47
Modules linked in: oracleacfs(P)(U) oracleadvm(P)(U) oracleoks(P)(U) nfs lockd fscache auth_rpcgss nfs_acl sunrpc symap_rh_ES_6_2_6_32_431_el6_x86_64(P)(U) symev_rh_ES_6_2_6_32_431_el6_x86_64(U) cpufreq_ondemand acpi_cpufreq freq_table mperf bonding ipmi_devintf vfat fat microcode iTCO_wdt iTCO_vendor_support lpc_ich mfd_core hpilo hpwdt ipmi_si ipmi_msghandler ses enclosure sg ext4 jbd2 mbcache dm_round_robin scsi_dh_alua sd_mod crc_t10dif qla2xxx scsi_transport_fc scsi_tgt crc32c_intel be2iscsi bnx2i cnic uio cxgb4i cxgb4 cxgb3i libcxgbi ipv6 cxgb3 libiscsi_tcp qla4xxx ixgbe iscsi_boot_sysfs libiscsi dca ptp scsi_transport_iscsi pps_core mdio dm_multipath dm_mirror dm_region_hash dm_log dm_mod [last unloaded: oracleoks]

Pid: 17955, comm: cp Tainted: P -- ------------ 2.6.32-754.3.5.el6.x86_64 #1 HP Superdome2 16s x86
RIP: 0010:[] [] strnlen+0x9/0x40
RSP: 0018:ffff88770c643b38 EFLAGS: 00010286
RAX: ffffffff817cc01e RBX: ffff886fc6c00c00 RCX: 0000000000000002
RDX: ffffffffa0a3d603 RSI: ffffffffffffffff RDI: ffffffffa0a3d603
RBP: ffff88770c643b38 R08: 0000000000000073 R09: 0000000000000000
R10: 000000000000000f R11: 000000000000000f R12: ffff886fc6c002cd
R13: ffffffffa0a3d603 R14: 00000000ffffffff R15: 0000000000000000
FS: 00007f0c1e4347a0(0000) GS:ffff8860e1640000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffffa0a3d603 CR3: 000000762f556000 CR4: 00000000001607e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Process cp (pid: 17955, threadinfo ffff88770c640000, task ffff88798edb2ab0)
Stack:
ffff88770c643b78 ffffffff812adc80 ffffea01ffffffff ffff886fc6c002cd
ffffffffa04105a0 ffffffffa041059e ffff88770c643c28 ffff886fc6c00c00
ffff88770c643c18 ffffffff812af748 0000000000000004 0000000affffffff
Call Trace:
[] string+0x40/0x100
[] vsnprintf+0x218/0x5f0
[] snprintf+0x34/0x40
[] symev_fops_devread+0x13d/0x1c0 [symev_rh_ES_6_2_6_32_431_el6_x86_64] <==== crashed on 3rd-party module symev_rh_ES_6_2_6_32_431_el6_x86_64.
[] symev_read_proc_symev+0x139/0x160 [symev_rh_ES_6_2_6_32_431_el6_x86_64]
[] ? filename_lookup+0x41/0xc0
[] sym_procfs_genread+0x22/0x30 [symev_rh_ES_6_2_6_32_431_el6_x86_64]
[] proc_file_read+0x1f3/0x370
[] proc_reg_read+0x80/0xc0
[] vfs_read+0xb7/0x1a0
[] ? fget_light_pos+0x16/0x50
[] sys_read+0x51/0xb0
[] ? system_call_after_swapgs+0xa2/0x152
[] ? system_call_after_swapgs+0xae/0x152
[] system_call_fastpath+0x35/0x3a
[] ? system_call_after_swapgs+0xae/0x152
Code: 66 90 48 83 c2 01 80 3a 00 75 f7 48 89 d0 48 29 f8 c9 c3 66 66 66 66 66 66 2e 0f 1f 84 00 00 00 00 00 55 48 85 f6 48 89 e5 74 2e 3f 00 74 29 48 83 ee 01 48 89 f8 eb 12 66 0f 1f 84 00 00 00
RIP [] strnlen+0x9/0x40
RSP
CR2: ffffffffa0a3d603

 

Cause

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In this Document
Symptoms
Cause
Solution


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