kernel-packages team mailing list archive
-
kernel-packages team
-
Mailing list archive
-
Message #26354
[Bug 1246664] Re: "Buffer I/O error on device zram0, logical block 515067"
** Description changed:
+ SRU Justification:
+
+ Commit 12a7ad3 "zram: avoid access beyond the zram device" introduced a
+ regression where valid_io_request() checks if request end coincides with
+ disksize (end equals bound). It fails if we attempt to read beyond the
+ bound.
+
+ Impact:
+
+ Several errors will be logged if, for example, zram-config is installed:
+
+ [ 14.666280] zram: module is from the staging directory, the quality is unknown, you have been warned.
+ [ 14.667040] zram: Creating 1 devices ...
+ [ 14.830355] Buffer I/O error on device zram0, logical block 62411
+ [ 14.830375] Buffer I/O error on device zram0, logical block 62411
+ [ 14.830598] Buffer I/O error on device zram0, logical block 62411
+ [ 14.830621] Buffer I/O error on device zram0, logical block 62411
+ [ 14.878597] Adding 249644k swap on /dev/zram0. Priority:5 extents:1 across:249644k SS
+
+ Fix:
+
+ Commit 75c7caf5a052ffd8db3312fa7864ee2d142890c4 "zram: allow request end
+ to coincide with disksize" fixes the issue by correcting the test in
+ valid_io_request() function.
+
+ Testcase:
+
+ I was able to reproduce the issue by simply installing zram-config in a
+ precise box.
+
+ =========================================================================================
+
This is a duplicate of #1217189, but for some reason neither @oibaf nor
me can reopen it. It is in "fix released" state, but the problem is at
most partially solved. It seems that the bug no longer causes lockups
(described in another bug: #1215513), but is still present (as I get
error messages on boot screen and after $ dmesg | grep zram).
If someone has enough privileges to reopen 1217189 for "linux (ubuntu)"
(I don't know about raring, but no one complains, so it is probably ok),
and remove this bug (maybe merging this message to the comments in
1217189), I would be really grateful.
Ubuntu 12.04.3 LTS
Kernel Linux 3.2.0-56-generic-pae (the problem was first observed in 53 and since 54 there are no lockups).
- ---
+ ---
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24.
AplayDevices:
- **** List of PLAYBACK Hardware Devices ****
- card 0: Intel [HDA Intel], device 0: ALC268 Analog [ALC268 Analog]
- Subdevices: 1/1
- Subdevice #0: subdevice #0
+ **** List of PLAYBACK Hardware Devices ****
+ card 0: Intel [HDA Intel], device 0: ALC268 Analog [ALC268 Analog]
+ Subdevices: 1/1
+ Subdevice #0: subdevice #0
ApportVersion: 2.0.1-0ubuntu17.6
Architecture: i386
ArecordDevices:
- **** List of CAPTURE Hardware Devices ****
- card 0: Intel [HDA Intel], device 0: ALC268 Analog [ALC268 Analog]
- Subdevices: 1/1
- Subdevice #0: subdevice #0
+ **** List of CAPTURE Hardware Devices ****
+ card 0: Intel [HDA Intel], device 0: ALC268 Analog [ALC268 Analog]
+ Subdevices: 1/1
+ Subdevice #0: subdevice #0
AudioDevicesInUse:
- USER PID ACCESS COMMAND
- /dev/snd/controlC0: damian 2771 F.... pulseaudio
+ USER PID ACCESS COMMAND
+ /dev/snd/controlC0: damian 2771 F.... pulseaudio
Card0.Amixer.info:
- Card hw:0 'Intel'/'HDA Intel at 0xf8300000 irq 47'
- Mixer name : 'Realtek ALC268'
- Components : 'HDA:10ec0268,10280275,00100003'
- Controls : 16
- Simple ctrls : 9
+ Card hw:0 'Intel'/'HDA Intel at 0xf8300000 irq 47'
+ Mixer name : 'Realtek ALC268'
+ Components : 'HDA:10ec0268,10280275,00100003'
+ Controls : 16
+ Simple ctrls : 9
DistroRelease: Ubuntu 12.04
MachineType: Dell Inc. Vostro1710
MarkForUpload: True
NonfreeKernelModules: nvidia wl
Package: linux (not installed)
ProcFB:
-
+
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.2.0-56-generic-pae root=UUID=bfe81069-1c35-4ccc-a23a-33528ac81877 ro selinux=1 security=selinux quiet splash
ProcVersionSignature: Ubuntu 3.2.0-56.86-generic-pae 3.2.51
RelatedPackageVersions:
- linux-restricted-modules-3.2.0-56-generic-pae N/A
- linux-backports-modules-3.2.0-56-generic-pae N/A
- linux-firmware 1.79.7
+ linux-restricted-modules-3.2.0-56-generic-pae N/A
+ linux-backports-modules-3.2.0-56-generic-pae N/A
+ linux-firmware 1.79.7
StagingDrivers: zram
Tags: precise running-unity staging
Uname: Linux 3.2.0-56-generic-pae i686
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm cdrom dip lpadmin netdev plugdev sambashare sudo
dmi.bios.date: 09/09/2008
dmi.bios.vendor: Dell Inc.
dmi.bios.version: A09
dmi.board.name: 0X805C
dmi.board.vendor: Dell Inc.
dmi.chassis.type: 8
dmi.chassis.vendor: Dell Inc.
dmi.chassis.version: N/A
dmi.modalias: dmi:bvnDellInc.:bvrA09:bd09/09/2008:svnDellInc.:pnVostro1710:pvrNull:rvnDellInc.:rn0X805C:rvr:cvnDellInc.:ct8:cvrN/A:
dmi.product.name: Vostro1710
dmi.product.version: Null
dmi.sys.vendor: Dell Inc.
--
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/1246664
Title:
"Buffer I/O error on device zram0, logical block 515067"
Status in “linux” package in Ubuntu:
Fix Released
Status in “linux” source package in Precise:
Fix Committed
Status in “linux” source package in Saucy:
Fix Released
Bug description:
SRU Justification:
Commit 12a7ad3 "zram: avoid access beyond the zram device" introduced
a regression where valid_io_request() checks if request end coincides
with disksize (end equals bound). It fails if we attempt to read
beyond the bound.
Impact:
Several errors will be logged if, for example, zram-config is
installed:
[ 14.666280] zram: module is from the staging directory, the quality is unknown, you have been warned.
[ 14.667040] zram: Creating 1 devices ...
[ 14.830355] Buffer I/O error on device zram0, logical block 62411
[ 14.830375] Buffer I/O error on device zram0, logical block 62411
[ 14.830598] Buffer I/O error on device zram0, logical block 62411
[ 14.830621] Buffer I/O error on device zram0, logical block 62411
[ 14.878597] Adding 249644k swap on /dev/zram0. Priority:5 extents:1 across:249644k SS
Fix:
Commit 75c7caf5a052ffd8db3312fa7864ee2d142890c4 "zram: allow request
end to coincide with disksize" fixes the issue by correcting the test
in valid_io_request() function.
Testcase:
I was able to reproduce the issue by simply installing zram-config in
a precise box.
=========================================================================================
This is a duplicate of #1217189, but for some reason neither @oibaf
nor me can reopen it. It is in "fix released" state, but the problem
is at most partially solved. It seems that the bug no longer causes
lockups (described in another bug: #1215513), but is still present (as
I get error messages on boot screen and after $ dmesg | grep zram).
If someone has enough privileges to reopen 1217189 for "linux
(ubuntu)" (I don't know about raring, but no one complains, so it is
probably ok), and remove this bug (maybe merging this message to the
comments in 1217189), I would be really grateful.
Ubuntu 12.04.3 LTS
Kernel Linux 3.2.0-56-generic-pae (the problem was first observed in 53 and since 54 there are no lockups).
---
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24.
AplayDevices:
**** List of PLAYBACK Hardware Devices ****
card 0: Intel [HDA Intel], device 0: ALC268 Analog [ALC268 Analog]
Subdevices: 1/1
Subdevice #0: subdevice #0
ApportVersion: 2.0.1-0ubuntu17.6
Architecture: i386
ArecordDevices:
**** List of CAPTURE Hardware Devices ****
card 0: Intel [HDA Intel], device 0: ALC268 Analog [ALC268 Analog]
Subdevices: 1/1
Subdevice #0: subdevice #0
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC0: damian 2771 F.... pulseaudio
Card0.Amixer.info:
Card hw:0 'Intel'/'HDA Intel at 0xf8300000 irq 47'
Mixer name : 'Realtek ALC268'
Components : 'HDA:10ec0268,10280275,00100003'
Controls : 16
Simple ctrls : 9
DistroRelease: Ubuntu 12.04
MachineType: Dell Inc. Vostro1710
MarkForUpload: True
NonfreeKernelModules: nvidia wl
Package: linux (not installed)
ProcFB:
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.2.0-56-generic-pae root=UUID=bfe81069-1c35-4ccc-a23a-33528ac81877 ro selinux=1 security=selinux quiet splash
ProcVersionSignature: Ubuntu 3.2.0-56.86-generic-pae 3.2.51
RelatedPackageVersions:
linux-restricted-modules-3.2.0-56-generic-pae N/A
linux-backports-modules-3.2.0-56-generic-pae N/A
linux-firmware 1.79.7
StagingDrivers: zram
Tags: precise running-unity staging
Uname: Linux 3.2.0-56-generic-pae i686
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm cdrom dip lpadmin netdev plugdev sambashare sudo
dmi.bios.date: 09/09/2008
dmi.bios.vendor: Dell Inc.
dmi.bios.version: A09
dmi.board.name: 0X805C
dmi.board.vendor: Dell Inc.
dmi.chassis.type: 8
dmi.chassis.vendor: Dell Inc.
dmi.chassis.version: N/A
dmi.modalias: dmi:bvnDellInc.:bvrA09:bd09/09/2008:svnDellInc.:pnVostro1710:pvrNull:rvnDellInc.:rn0X805C:rvr:cvnDellInc.:ct8:cvrN/A:
dmi.product.name: Vostro1710
dmi.product.version: Null
dmi.sys.vendor: Dell Inc.
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1246664/+subscriptions
