Bug 1313812 - kernel: Kernel panic when mounting specially crafted ext2 filesystem
Summary: kernel: Kernel panic when mounting specially crafted ext2 filesystem
Keywords:
Status: CLOSED NOTABUG
Alias: None
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
low
low
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 1322277
Blocks: 1313817
TreeView+ depends on / blocked
 
Reported: 2016-03-02 11:59 UTC by Adam Mariš
Modified: 2021-02-17 04:14 UTC (History)
26 users (show)

Fixed In Version:
Doc Type: Bug Fix
Doc Text:
Clone Of:
Environment:
Last Closed: 2016-05-28 15:15:04 UTC
Embargoed:

Attachments (Terms of Use)
Crash report (1.63 KB, text/plain)
2016-03-02 12:01 UTC, Adam Mariš 		no flags Details
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Description Adam Mariš 2016-03-02 11:59:00 UTC 
Kernel panic caused by mounting specially crafted ext2 filesystem was found. This issue was tested on linux kernel 3.10, 3.18 and 3.19.
Comment 1 Adam Mariš 2016-03-02 11:59:15 UTC 
Acknowledgments:

Name: Hugues Anguelkov
Comment 2 Adam Mariš 2016-03-02 12:01:10 UTC 
Created attachment 1132278 [details]
Crash report
Comment 5 Andrej Nemec 2016-03-30 08:03:14 UTC 
Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 1322277]
Comment 6 Andrej Nemec 2016-03-30 08:03:35 UTC 
Public via:

http://seclists.org/oss-sec/2016/q1/709
Comment 7 Josh Boyer 2016-03-31 12:22:02 UTC 
Upstream's stance on this bug:

http://marc.info/?l=linux-ext4&m=145937069606704&w=2

Basically, they plan on doing nothing in the kernel.

The two suggestions of running fsck and mounting with -o errors=continue are feasible, but they would need to be done in userspace.
Comment 8 Vladis Dronov 2016-05-28 15:15:04 UTC 
Statement:

This issue affects the Linux kernel packages as shipped with Red Hat Enterprise Linux 5, 6, 7 and MRG-2. This has been rated as having Low security impact, as this is actually not a security flaw but intended kernel reaction. This is not currently planned to be addressed in future updates. For additional information, refer to the Red Hat Enterprise Linux Life Cycle: https://access.redhat.com/support/policy/updates/errata/.
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