Kernel panic in _write_lock_bh
Issue
- Kernel panic, system crashed, or system rebooted
- The console shows messages similar to the following
[9748517.441952] BUG: unable to handle kernel NULL pointer dereference at 0000000000000148
[9748517.442155] IP: [<ffffffff8153c3d9>] _write_lock_bh+0x19/0x30
[9748517.442274] PGD c252bc067 PUD 81aeb1067 PMD 901f40067 PTE 0
[9748517.442388] Oops: 0002 [#1] SMP
[9748517.442471] last sysfs file: /sys/devices/system/cpu/online
[9748517.442579] CPU 3
[9748517.442604] Modules linked in: softdog autofs4 nfs lockd fscache auth_rpcgss nfs_acl sunrpc be2iscsi iscsi_boot_sysfs uio cxgb3 mdio iscsi_tcp libiscsi_tcp libiscsi scsi_transport_iscsi vsock(U) vmblock(U) fuse ppdev parport_pc parport microcode vmware_balloon vmxnet3 vmci(U) i2c_piix4 i2c_core sg shpchp ext4 jbd2 mbcache sd_mod crc_t10dif sr_mod cdrom vmw_pvscsi pata_acpi ata_generic ata_piix dm_mirror dm_region_hash dm_log dm_mod [last unloaded: scsi_wait_scan]
[9748517.443448]
[9748517.443509] Pid: 2169, comm: rpciod/3 Not tainted 2.6.32-573.18.1.el6.x86_64 #1 VMware, Inc. VMware Virtual Platform/440BX Desktop Reference Platform
[9748517.443792] RIP: 0010:[<ffffffff8153c3d9>] [<ffffffff8153c3d9>] _write_lock_bh+0x19/0x30
[9748517.443971] RSP: 0018:ffff880c251d3dc0 EFLAGS: 00010206
[9748517.444074] RAX: ffff880c251d3fd8 RBX: 0000000000000148 RCX: ffff880be787aad8
[9748517.444237] RDX: ffff880be787aad0 RSI: 0000000000000282 RDI: 0000000000000148
[9748517.444399] RBP: ffff880c251d3dd0 R08: 0000000000000000 R09: 0000000000000000
[9748517.444561] R10: 0000000000000000 R11: ae56500092f02898 R12: ffff880c2613b5d0
[9748517.444722] R13: 0000000000000000 R14: ffff8808ef0c29c0 R15: 0000000000000148
[9748517.444886] FS: 0000000000000000(0000) GS:ffff880028260000(0000) knlGS:0000000000000000
[9748517.445087] CS: 0010 DS: 0018 ES: 0018 CR0: 000000008005003b
[9748517.445195] CR2: 0000000000000148 CR3: 0000000529097000 CR4: 00000000000006e0
[9748517.445408] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[9748517.445592] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
[9748517.445757] Process rpciod/3 (pid: 2169, threadinfo ffff880c251d0000, task ffff880c251c4040)
[9748517.445933] Stack:
[9748517.445999] ffff880c251d3dd0 ffff880c2613b000 ffff880c251d3e30 ffffffffa02a8c4b
[9748517.446130] <d> 0000000000000000 0000000000000000 ffff880c251d3e30 0000000055e1e8c6
[9748517.446306] <d> ffff880c251d3fd8 ffffe8ffffc61700 ffffe8ffffc61700 ffffffffa02a88b0
[9748517.446524] Call Trace:
[9748517.446614] [<ffffffffa02a8c4b>] xs_tcp_setup_socket+0x39b/0x4b0 [sunrpc]
[9748517.446742] [<ffffffffa02a88b0>] ? xs_tcp_setup_socket+0x0/0x4b0 [sunrpc]
[9748517.446866] [<ffffffff8109a780>] worker_thread+0x170/0x2a0
[9748517.446976] [<ffffffff810a1460>] ? autoremove_wake_function+0x0/0x40
[9748517.447093] [<ffffffff8109a610>] ? worker_thread+0x0/0x2a0
[9748517.447201] [<ffffffff810a0fce>] kthread+0x9e/0xc0
[9748517.447302] [<ffffffff8100c28a>] child_rip+0xa/0x20
[9748517.447402] [<ffffffff810a0f30>] ? kthread+0x0/0xc0
[9748517.447501] [<ffffffff8100c280>] ? child_rip+0x0/0x20
[9748517.447601] Code: 00 01 48 89 f7 57 9d 0f 1f 44 00 00 c9 c3 0f 1f 40 00 55 48 89 e5 53 48 83 ec 08 0f 1f 44 00 00 48 89 fb e8 8a 2f b4 ff 48 89 df <f0> 81 2f 00 00 00 01 74 05 e8 39 18 d6 ff 48 83 c4 08 5b c9 c3
[9748517.448046] RIP [<ffffffff8153c3d9>] _write_lock_bh+0x19/0x30
[9748517.448158] RSP <ffff880c251d3dc0>
[9748517.448240] CR2: 0000000000000148
Environment
- Red Hat Enterprise Linux 6
- many kernels prior to kernel-2.6.32-696.el6 believed to be affected
- seen on kernels 2.6.32-504*.el6
- seen on kernels 2.6.32-573*.el6
- seen on kernels 2.6.32-642*.el6
Subscriber exclusive content
A Red Hat subscription provides unlimited access to our knowledgebase of over 48,000 articles and solutions.
Welcome! Check out the Getting Started with Red Hat page for quick tours and guides for common tasks.
