Kernel panic during NULL pointer dereference at 00000000000000f8 inside gendmpstrategy() function.

Solution Unverified - Updated -

Issue

  • Kernel panic with following call traces.
VxVM vxdmp V-5-0-112 disabled path 68/0x60 belonging to the dmpnode 201/0x50
VxVM vxdmp V-5-0-111 disabled dmpnode 201/0x50

Unable to handle kernel NULL pointer dereference at 00000000000000f8 RIP: 
 [<ffffffff88511cea>] :vxdmp:gendmpstrategy+0x2f8/0x3c3
PGD 82490e067 PUD 828e04067 PMD 0 
Oops: 0002 [1] SMP 
last sysfs file: /devices/pci0000:00/0000:00:01.0/0000:06:00.0/0000:07:01.0/0000:09:00.0/0000:0a:04.1/irq
CPU 4 
Modules linked in: ipmi_devintf ipmi_si ipmi_msghandler gab(PU) llt(PU) vtune_drv(U) oracleasm(U) hp_ilo(U) nfs lockd fscache nfs_acl sunrpc bonding dmpjbod(PU) dmpap(PU) dmpaa(PU) vxspec(PFU) vxio(PFU) vxdmp(PU) vxportal(PFU) fdd(PFU) vxfs(PU) dm_mirror dm_multipath dm_mod video sbs backlight i2c_ec i2c_core button battery asus_acpi acpi_memhotplug ac parport_pc lp parport sg shpchp serio_raw pcspkr tg3 bnx2 mptctl mptbase usb_storage lpfc scsi_transport_fc cciss sd_mod scsi_mod ext3 jbd uhci_hcd ohci_hcd ehci_hcd
Pid: 11799, comm: dmp_daemon Tainted: PF     2.6.18-92.1.10.el5 #1
RIP: 0010:[<ffffffff88511cea>]  [<ffffffff88511cea>] :vxdmp:gendmpstrategy+0x2f8/0x3c3
RSP: 0018:ffff8107f99f5ec0  EFLAGS: 00010006
RAX: 00000000000000f0 RBX: 0000000000000005 RCX: ffff81073c9f5b40
RDX: ffff810813740000 RSI: 0000000000000286 RDI: ffffffff8854d040
RBP: 0000000000000006 R08: ffffffff8005081b R09: 0000000000001000
R10: 0000000100000000 R11: 0000000000000000 R12: ffff81073c9f5b40
R13: 0000000000000004 R14: 0000000000000050 R15: 00002b67cf1e5010
FS:  00002b67cf1e4240(0000) GS:ffff81082ff79cc0(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 000000008005003b
CR2: 00000000000000f8 CR3: 0000000811d83000 CR4: 00000000000006e0
Process dmp_daemon (pid: 11799, threadinfo ffff8107f99f4000, task ffff81081237a7a0)
Stack:  0000000000000286 ffff8107279ab3c0 ffff810811789e00 ffff81073c9f5b40
 ffff81082aa4a000 00002b67cf1e5010 000000001c9550f8 ffffffff88512e2e
 0000000000000000 ffffffff8852a61d ffff810756e7dc80 0000000000000000
Call Trace:
 [<ffffffff88512e2e>] :vxdmp:dmp_error_action+0x24/0xf1
 [<ffffffff8852a61d>] :vxdmp:dmp_process_scsireq+0x0/0xd
 [<ffffffff8852a61d>] :vxdmp:dmp_process_scsireq+0x0/0xd
 [<ffffffff8852b575>] :vxdmp:dmp_daemons_loop+0x1b3/0x1cb
 [<ffffffff8005dfb1>] child_rip+0xa/0x11
 [<ffffffff8852b3c2>] :vxdmp:dmp_daemons_loop+0x0/0x1cb
 [<ffffffff8005dfa7>] child_rip+0x0/0x11

Code: 48 ff 40 08 eb 0f 48 6b c3 30 48 03 05 0d b9 03 00 48 ff 40 
RIP  [<ffffffff88511cea>] :vxdmp:gendmpstrategy+0x2f8/0x3c3
 RSP <ffff8107f99f5ec0>

Environment

  • Red Hat Enterprise Linux 5
  • Veritas Cluster Server (VCS)
  • Unsigned (U) module vxdmp

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