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Bug 1551992 - (CVE-2017-18216) CVE-2017-18216 kernel: Null pointer dereference in fs/ocfs2/cluster/nodemanager.c allows local users to cause denial of service
CVE-2017-18216 kernel: Null pointer dereference in fs/ocfs2/cluster/nodemanag...
Status: CLOSED NOTABUG
Product: Security Response
Classification: Other
Component: vulnerability (Show other bugs)
unspecified
All Linux
medium Severity medium
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Assigned To: Red Hat Product Security
impact=moderate,public=20171116,repor...
: Security
Depends On: 1551993 1553321
Blocks: 1552000
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Reported: 2018-03-06 05:02 EST by Adam Mariš
Modified: 2018-03-13 12:16 EDT (History)
46 users (show)

See Also:
Fixed In Version: kernel 4.15
Doc Type: If docs needed, set a value
Doc Text:
In fs/ocfs2/cluster/nodemanager.c in the Linux kernel before 4.15, local users can cause a denial of service (NULL pointer dereference and BUG) because a required mutex is not used.
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Clone Of:
Environment:
Last Closed: 2018-03-08 11:56:06 EST
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CRM:
Verified Versions:
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oVirt Team: ---
RHEL 7.3 requirements from Atomic Host:
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Description Adam Mariš 2018-03-06 05:02:12 EST 
In fs/ocfs2/cluster/nodemanager.c in the Linux kernel before 4.15, local users can cause a denial of service (NULL pointer dereference and BUG) because a required mutex is not used.

References:

https://marc.info/?t=150881360600002&r=1&w=2

An upstream patch:

https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=853bc26a7ea39e354b9f8889ae7ad1492ffa28d2
Comment 3 Vladis Dronov 2018-03-08 11:50:42 EST 
Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 1553321]
Comment 5 Justin M. Forbes 2018-03-08 12:01:13 EST 
This was fixed for Fedora with the 4.15 rebases
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