* [Bug 12375] New: ext4_block_to_path block too big cause cpu to burn
@ 2009-01-07 10:56 bugme-daemon
2009-01-07 10:57 ` [Bug 12375] " bugme-daemon
` (2 more replies)
0 siblings, 3 replies; 4+ messages in thread
From: bugme-daemon @ 2009-01-07 10:56 UTC (permalink / raw
To: linux-ext4
http://bugzilla.kernel.org/show_bug.cgi?id=12375
Summary: ext4_block_to_path block too big cause cpu to burn
Product: File System
Version: 2.5
KernelVersion: 2.6.28
Platform: All
OS/Version: Linux
Tree: Mainline
Status: NEW
Severity: normal
Priority: P1
Component: ext4
AssignedTo: fs_ext4@kernel-bugs.osdl.org
ReportedBy: dmaciejak@fortinet.com
Latest working kernel version: none
Earliest failing kernel version: unknow
Distribution: ubuntu
Hardware Environment: dell optiplex 740
Software Environment:
Problem Description:
when mounting specially crafted ext4 image, after some few seconds (5s),
kern.log is filled with some data and cpu reaches 100%
Steps to reproduce:
bunzip the image file enclosed and mount the image with mount -t ext4 -o loop
ext4.img /media/tmp
note: i also tried the 2.6.28-ext4-3 patch but it does not help
Regards,
David Maciejak
Fortinet's FortiGuard Global Security Research Team
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* [Bug 12375] ext4_block_to_path block too big cause cpu to burn
2009-01-07 10:56 [Bug 12375] New: ext4_block_to_path block too big cause cpu to burn bugme-daemon
@ 2009-01-07 10:57 ` bugme-daemon
2009-01-07 10:57 ` bugme-daemon
2009-01-17 23:44 ` bugme-daemon
2 siblings, 0 replies; 4+ messages in thread
From: bugme-daemon @ 2009-01-07 10:57 UTC (permalink / raw
To: linux-ext4
http://bugzilla.kernel.org/show_bug.cgi?id=12375
------- Comment #1 from dmaciejak@fortinet.com 2009-01-07 02:57 -------
Created an attachment (id=19685)
--> (http://bugzilla.kernel.org/attachment.cgi?id=19685&action=view)
kernel log extract
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* [Bug 12375] ext4_block_to_path block too big cause cpu to burn
2009-01-07 10:56 [Bug 12375] New: ext4_block_to_path block too big cause cpu to burn bugme-daemon
2009-01-07 10:57 ` [Bug 12375] " bugme-daemon
@ 2009-01-07 10:57 ` bugme-daemon
2009-01-17 23:44 ` bugme-daemon
2 siblings, 0 replies; 4+ messages in thread
From: bugme-daemon @ 2009-01-07 10:57 UTC (permalink / raw
To: linux-ext4
http://bugzilla.kernel.org/show_bug.cgi?id=12375
------- Comment #2 from dmaciejak@fortinet.com 2009-01-07 02:57 -------
Created an attachment (id=19686)
--> (http://bugzilla.kernel.org/attachment.cgi?id=19686&action=view)
ext4 image poc
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* [Bug 12375] ext4_block_to_path block too big cause cpu to burn
2009-01-07 10:56 [Bug 12375] New: ext4_block_to_path block too big cause cpu to burn bugme-daemon
2009-01-07 10:57 ` [Bug 12375] " bugme-daemon
2009-01-07 10:57 ` bugme-daemon
@ 2009-01-17 23:44 ` bugme-daemon
2 siblings, 0 replies; 4+ messages in thread
From: bugme-daemon @ 2009-01-17 23:44 UTC (permalink / raw
To: linux-ext4
http://bugzilla.kernel.org/show_bug.cgi?id=12375
tytso@mit.edu changed:
What |Removed |Added
----------------------------------------------------------------------------
AssignedTo|fs_ext4@kernel-bugs.osdl.org|tytso@mit.edu
Status|NEW |ASSIGNED
------- Comment #3 from tytso@mit.edu 2009-01-17 15:44 -------
Created an attachment (id=19872)
--> (http://bugzilla.kernel.org/attachment.cgi?id=19872&action=view)
Patch to address this bug
This patch should address this bug. Thanks for reporting it!
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2009-01-07 10:56 [Bug 12375] New: ext4_block_to_path block too big cause cpu to burn bugme-daemon
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2009-01-07 10:57 ` bugme-daemon
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