Hi, I am running 3.0.34-0.7-default #1 SMP Tue Jun 19 09:56:30 UTC 2012 (fbfc70c) x86_64 x86_64 x86_64 GNU/Linux on a HP DL380 G7 SLES11SP2 server. When trying to deal with a DRDB split brain situation I am getting sometimes: [10868.575914] block drbd0: helper command: /sbin/drbdadm before-resync-source minor-0 [10868.621929] BUG: unable to handle kernel NULL pointer dereference at 0000000000000030 [10868.655975] IP: [<ffffffff81370258>] sock_ioctl+0x28/0x280 [10868.655981] PGD 5c8afd067 PUD 5eea4b067 PMD 0 [10868.655984] Oops: 0000 [#6] SMP [10868.655986] CPU 4 [10868.655987] Modules linked in: md5 sctp dlm configfs drbd crc32c libcrc32c binfmt_misc edd af_packet bridge stp llc cpufreq_conservative cpufreq_userspace cpufreq_powersave pcc_cpufreq mperf microcode fuse loop vhost_net macvtap macvlan tun kvm_intel ipv6 kvm ipv6_lib be2net(X) joydev i7core_edac pcspkr rtc_cmos bnx2 edac_core iTCO_wdt hpwdt acpi_power_meter hpilo iTCO_vendor_support button container ext3 jbd mbcache usbhid hid dm_mirror dm_region_hash dm_log linear uhci_hcd ehci_hcd usbcore usb_common thermal processor thermal_sys hwmon scsi_dh_emc scsi_dh_alua scsi_dh_hp_sw scsi_dh_rdac scsi_dh dm_snapshot dm_mod cciss(X) hpahcisr(PX) scsi_mod [last unloaded: ocfs2_stackglue] [10868.656013] Supported: Yes, External [10868.656014] [10868.656016] Pid: 9482, comm: drbdadm Tainted: P D X 3.0.34-0.7-default #1 HP ProLiant DL380 G7 [10868.656018] RIP: 0010:[<ffffffff81370258>] [<ffffffff81370258>] sock_ioctl+0x28/0x280 [10868.656021] RSP: 0018:ffff880bb7bdbee8 EFLAGS: 00010296 [10868.656023] RAX: 0000000000000000 RBX: 0000000000005401 RCX: 00007fff8f7810b0 [10868.656024] RDX: 00007fff8f7810b0 RSI: 0000000000005401 RDI: ffff8805d3976d40 [10868.656025] RBP: 00007fff8f7810b0 R08: 0000000000000000 R09: 00007fdc3e232640 [10868.656027] R10: 00007fff8f780ee0 R11: ffffffff811e0a90 R12: 00007fff8f7810b0 [10868.656028] R13: 0000000000000000 R14: 0000000000005401 R15: 0000000000000000 [10868.656030] FS: 00007fdc3e404700(0000) GS:ffff88061fc40000(0000) knlGS:0000000000000000 [10868.656031] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [10868.656032] CR2: 0000000000000030 CR3: 00000005f2d85000 CR4: 00000000000006e0 [10868.656033] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [10868.656035] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400 [10868.656036] Process drbdadm (pid: 9482, threadinfo ffff880bb7bda000, task ffff880bc4f66040) [10868.656037] Stack: [10868.656038] 0000000000000202 ffff8805f5883680 00007fff8f7810b0 00007fff8f7810b0 [10868.656040] 0000000000000000 ffffffff81160f5b 0000000000000006 0000000000000000 [10868.656043] 0000000000000000 ffff8805f5883680 00007fff8f7810b0 ffffffff81161321 [10868.656045] Call Trace: [10868.656054] [<ffffffff81160f5b>] do_vfs_ioctl+0x8b/0x3b0 [10868.656057] [<ffffffff81161321>] sys_ioctl+0xa1/0xb0 [10868.656061] [<ffffffff81449392>] system_call_fastpath+0x16/0x1b [10868.656988] DWARF2 unwinder stuck at system_call_fastpath+0x16/0x1b [10868.656989] [10868.656990] Leftover inexact backtrace: [10868.656990] [10868.656992] Code: 00 00 00 48 83 ec 28 48 89 5c 24 08 48 89 6c 24 10 89 f3 4c 89 64 24 18 4c 89 6c 24 20 48 89 d5 48 8b bf a0 00 00 00 48 8b 47 20 <4c> 8b 60 30 8d 83 10 76 ff ff 83 f8 0f 0f 86 a5 00 00 00 8d 83 [10868.657003] RIP [<ffffffff81370258>] sock_ioctl+0x28/0x280 [10868.657005] RSP <ffff880bb7bdbee8> [10868.657006] CR2: 0000000000000030 [10868.657082] ---[ end trace 5ae4fc189d552994 ]--- Any else information I should provide? Best regards Martin Konold Robert Bosch GmbH Automotive Electronics Postfach 13 42 72703 Reutlingen GERMANY www.bosch.com Tel. +49 7121 35 3322 Sitz: Stuttgart, Registergericht: Amtsgericht Stuttgart, HRB 14000; Aufsichtsratsvorsitzender: Hermann Scholl; Geschäftsführung: Franz Fehrenbach, Siegfried Dais; Stefan Asenkerschbaumer, Bernd Bohr, Rudolf Colm, Volkmar Denner, Christoph Kübel, Uwe Raschke, Wolf-Henning Scheider, Werner Struth, Peter Tyroller -- To unsubscribe, e-mail: opensuse-kernel+unsubscribe@opensuse.org To contact the owner, e-mail: opensuse-kernel+owner@opensuse.org