Bug 1308846 - (CVE-2016-3070) CVE-2016-3070 kernel: Null pointer dereference in trace_writeback_dirty_page()
CVE-2016-3070 kernel: Null pointer dereference in trace_writeback_dirty_page()
Status: ASSIGNED
Product: Security Response
Classification: Other
Component: vulnerability (Show other bugs)
unspecified
All Linux
low Severity low
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Assigned To: Red Hat Product Security
impact=low,public=20160510,reported=2...
: Reopened, Security
Depends On: 1306851 1331967 1331968
Blocks: 1308847
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Reported: 2016-02-16 04:30 EST by Adam Mariš
Modified: 2016-11-15 08:45 EST (History)
25 users (show)

See Also:
Fixed In Version:
Doc Type: Bug Fix
Doc Text:
A security flaw was found in the Linux kernel that an attempt to move page mapped by AIO ring buffer to the other node triggers NULL pointer dereference at trace_writeback_dirty_page(), because aio_fs_backing_dev_info.dev is 0.
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Last Closed: 2016-03-24 05:26:02 EDT
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RHEL 7.3 requirements from Atomic Host:
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Description Adam Mariš 2016-02-16 04:30:23 EST
It was reported that attempt to move page mapped by aio ring buffer to other node triggers NULL pointer dereference at trace_writeback_dirty_page(), because aio_fs_backing_dev_info.dev is 0.

Product bug (contains reproducer):

https://bugzilla.redhat.com/show_bug.cgi?id=1306851

Upstream patch:

http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=42cb14b110a5698ccf26ce59c4441722605a3743
Comment 1 Vladis Dronov 2016-03-23 14:46:40 EDT
Acknowledgments:

Name: Jan Stancek (Red Hat)
Comment 2 Vladis Dronov 2016-03-23 15:04:52 EDT
Statement:

This issue does not affect the Linux kernel packages as shipped with Red Hat Enterprise Linux 5, 6 as the code with the flaw is not present in the products listed.

This issue affects the Linux kernel packages as shipped with Red Hat Enterprise Linux 7 and MRG-2. Future updates for the respective releases may address the issue.
Comment 3 Adam Mariš 2016-03-24 04:53:55 EDT
Internal CVE assignment: CVE-2016-3070
Comment 8 errata-xmlrpc 2016-11-03 11:35:34 EDT
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2016:2574 https://rhn.redhat.com/errata/RHSA-2016-2574.html
Comment 9 errata-xmlrpc 2016-11-03 15:42:22 EDT
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2016:2584 https://rhn.redhat.com/errata/RHSA-2016-2584.html
Comment 10 errata-xmlrpc 2016-11-03 17:32:48 EDT
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2016:2574 https://rhn.redhat.com/errata/RHSA-2016-2574.html
Comment 11 errata-xmlrpc 2016-11-03 17:47:59 EDT
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2016:2584 https://rhn.redhat.com/errata/RHSA-2016-2584.html

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