Bug 1223818 (CVE-2024-27069) - VUL-0: CVE-2024-27069: kernel: ovl: relax WARN_ON in ovl_verify_area()
Summary: VUL-0: CVE-2024-27069: kernel: ovl: relax WARN_ON in ovl_verify_area()
Status: RESOLVED FIXED
Alias: CVE-2024-27069
Product: SUSE Security Incidents
Classification: Novell Products
Component: Incidents (show other bugs)
Version: unspecified
Hardware: Other Other
: P5 - None : Normal
Target Milestone: ---
Assignee: Kernel Bugs
QA Contact: Security Team bot
URL: https://smash.suse.de/issue/403860/
Whiteboard: CVSSv3.1:SUSE:CVE-2024-27069:5.5:(AV:...
Keywords:
Depends on:
Blocks:
 
Reported: 2024-05-03 07:55 UTC by SMASH SMASH
Modified: 2024-05-03 07:56 UTC (History)
1 user (show)

See Also:
Found By: Security Response Team
Services Priority:
Business Priority:
Blocker: ---
Marketing QA Status: ---
IT Deployment: ---

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Description SMASH SMASH 2024-05-03 07:55:55 UTC 
In the Linux kernel, the following vulnerability has been resolved:

ovl: relax WARN_ON in ovl_verify_area()

syzbot hit an assertion in copy up data loop which looks like it is
the result of a lower file whose size is being changed underneath
overlayfs.

This type of use case is documented to cause undefined behavior, so
returning EIO error for the copy up makes sense, but it should not be
causing a WARN_ON assertion.

References:
http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2024-27069
https://www.cve.org/CVERecord?id=CVE-2024-27069
https://git.kernel.org/stable/c/77a28aa476873048024ad56daf8f4f17d58ee48e
https://git.kernel.org/stable/c/c3c85aefc0da1e5074a06c682542a54ccc99bdca
https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2024/CVE-2024-27069.mbox
https://bugzilla.redhat.com/show_bug.cgi?id=2278513