Kernel panics with RIP "show_partition+209" in Red Hat Enterprise Linux 4/5.
Issue
- RHEL-4/5 kernel panic at function show_partition+209 with following call traces:
Unable to handle kernel NULL pointer dereference at 0000000000000008 RIP:
<ffffffff802559af>{show_partition+209}
PML4 b4b89067 PGD b4b53067 PMD 0
Oops: 0000 [1] SMP
CPU 2
Modules linked in: cpqci(U) mptctl sg md5 ipv6 nfs lockd nfs_acl autofs4 i2c_dev i2c_core sunrpc ide_dump cciss_dump scsi_dump
diskdump zlib_deflate lpfcdfc qioctlmod qla2xxx vxspec(U) vxio(U) vxdmp(U) fdd(U) vxportal(U) vxfs(U) dm_mod button battery ac
hw_random k8_edac edac_mc tg3 e1000 floppy ext3 jbd lpfc scsi_transport_fc sata_nv libata mptsas cciss mptspi mptscsi mptbase
usb_storage uhci_hcd ohci_hcd ehci_hcd sd_mod scsi_mod
Pid: 23056, comm: cmaperfd Tainted: PF 2.6.9-67.0.1.ELsmp
RIP: 0010:[<ffffffff802559af>] <ffffffff802559af>{show_partition+209}
RSP: 0018:00000100b4405e68 EFLAGS: 00010202
RAX: 0000000000000000 RBX: 0000000000000001 RCX: 0000000000000002
RDX: 0000000000000000 RSI: ffffffff8033bdac RDI: 00000100e9e3ff80
RBP: 00000100010a5c00 R08: 00000000fffffffb R09: 00000100b4405e68
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000001
R13: 00000100e9e3ff80 R14: 0000000000000178 R15: 0000000000000000
FS: 0000002a95562b00(0000) GS:ffffffff804f2f00(005b) knlGS:00000000f7fe76c0
CS: 0010 DS: 002b ES: 002b CR0: 000000008005003b
CR2: 0000000000000008 CR3: 00000000c06c0000 CR4: 00000000000006e0
Process cmaperfd (pid: 23056, threadinfo 00000100b4404000, task 000001007b01b7f0)
Stack: 327031504d447856 0000000039703000 0000000000000246 0000000000000246
0000000000000246 00000100010a5c00 00000100e9e3ff80 0000000000000000
0000000000000400 ffffffff80198642
Call Trace:<ffffffff80198642>{seq_read+445} <ffffffff8017ad28>{vfs_read+207}
<ffffffff8017af84>{sys_read+69} <ffffffff80126723>{cstar_do_call+27}
Environment
- Red Hat Enterprise Linux 4 - ( kernel version earlier than 2.6.9-89.0.7.EL )
- Red Hat Enterprise Linux 5 - ( kernel version earlier than 2.6.18-164.el5 )
- Vertias Volume Manager ( with vxconfigd )
- Requires "io_stat" or another application calling show_partition()
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