This was fixed by the commit below which was commited in v3.2-rc4, this is therefore fixed for precise and later at the very least:
commit b772a86ea6d932ac29d5e50e67c977653c832f8a Author: Li Zefan <l...@cn.fujitsu.com> Date: Mon Nov 28 16:43:00 2011 +0800 Btrfs: fix oops when calling statfs on readonly device Closing out fixed. ** Changed in: linux (Ubuntu) Status: In Progress => Fix Released -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/816770 Title: kernel BUG when mounting btrfs filesystem from read-only (R/O) media Status in The Linux Kernel: Fix Released Status in linux package in Ubuntu: Fix Released Status in linux package in Debian: Fix Released Bug description: Inserted an SD card that contained a btrfs filesystem and tried to open using nautilus. ProblemType: KernelOops DistroRelease: Ubuntu 11.10 Package: linux-image-3.0.0-7-generic 3.0.0-7.8 ProcVersionSignature: Ubuntu 3.0.0-7.8-generic 3.0.0 Uname: Linux 3.0.0-7-generic x86_64 AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24. Annotation: Your system might become unstable now and might need to be restarted. Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC1: phil 4897 F.... pulseaudio /dev/snd/seq: timidity 4688 F.... timidity CRDA: Error: [Errno 2] No such file or directory Card0.Amixer.info: Card hw:0 'Intel'/'HDA Intel at 0xfc300000 irq 47' Mixer name : 'Realtek ALC268' Components : 'HDA:10ec0268,1025011f,00100003 HDA:14f12c06,10250093,00100000' Controls : 19 Simple ctrls : 13 Card1.Amixer.info: Card hw:1 'Set'/'C-Media USB Headphone Set at usb-0000:00:1d.7-3.6.4, full speed' Mixer name : 'USB Mixer' Components : 'USB0d8c:000c' Controls : 7 Simple ctrls : 3 Date: Wed Jul 27 12:13:55 2011 Failure: oops HibernationDevice: RESUME=UUID=4e603944-5cd0-47a1-b5e4-b7b1b520d080 MachineType: Acer TravelMate 7720 PccardctlIdent: Socket 0: no product info available PccardctlStatus: Socket 0: no card ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-3.0.0-7-generic root=/dev/mapper/vgsystem-root ro rootfstype=ext4 quiet splash vt.handoff=7 RelatedPackageVersions: kerneloops-daemon 0.12+git20090217-1ubuntu13 SourcePackage: linux Title: ] ------------[ cut here ]------------ UpgradeStatus: Upgraded to oneiric on 2011-07-17 (10 days ago) dmi.bios.date: 07/03/2008 dmi.bios.vendor: Phoenix Technologies LTD dmi.bios.version: V1.35 dmi.board.name: Tangiz dmi.board.vendor: Acer dmi.board.version: Rev dmi.chassis.asset.tag: None dmi.chassis.type: 10 dmi.chassis.vendor: Acer dmi.chassis.version: N/A dmi.modalias: dmi:bvnPhoenixTechnologiesLTD:bvrV1.35:bd07/03/2008:svnAcer:pnTravelMate7720:pvr0100:rvnAcer:rnTangiz:rvrRev:cvnAcer:ct10:cvrN/A: dmi.product.name: TravelMate 7720 dmi.product.version: 0100 dmi.sys.vendor: Acer To manage notifications about this bug go to: https://bugs.launchpad.net/linux/+bug/816770/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp