Bug 1226866 (CVE-2024-38604)

Summary: VUL-0: CVE-2024-38604: kernel: block: refine the EOF check in blkdev_iomap_begin
Product: [Novell Products] SUSE Security Incidents Reporter: SMASH SMASH <smash_bz>
Component: IncidentsAssignee: Security Team bot <security-team>
Status: RESOLVED FIXED QA Contact: Security Team bot <security-team>
Severity: Normal    
Priority: P3 - Medium CC: abergmann, mhocko
Version: unspecified   
Target Milestone: ---   
Hardware: Other   
OS: Other   
URL: https://smash.suse.de/issue/411433/
Whiteboard: CVSSv3.1:SUSE:CVE-2024-38604:5.5:(AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H)
Found By: Security Response Team Services Priority:
Business Priority: Blocker: ---
Marketing QA Status: --- IT Deployment: ---

Description SMASH SMASH 2024-06-24 10:24:10 UTC 
In the Linux kernel, the following vulnerability has been resolved:

block: refine the EOF check in blkdev_iomap_begin

blkdev_iomap_begin rounds down the offset to the logical block size
before stashing it in iomap->offset and checking that it still is
inside the inode size.

Check the i_size check to the raw pos value so that we don't try a
zero size write if iter->pos is unaligned.

References:
http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2024-38604
https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2024/CVE-2024-38604.mbox
https://git.kernel.org/stable/c/910717920c8c3f9386277a44c44d448058a18084
https://git.kernel.org/stable/c/72c54e063c32aeb38d43a2bd897821e6e5a1757d
https://git.kernel.org/stable/c/10b723bcba8986537a484aa94dbfc9093fd776a1
https://git.kernel.org/stable/c/0c12028aec837f5a002009bbf68d179d506510e8
https://www.cve.org/CVERecord?id=CVE-2024-38604
https://bugzilla.redhat.com/show_bug.cgi?id=2293361
Comment 1 Alexander Bergmann 2024-06-24 10:25:05 UTC 
Not affecting any SLE code stream.
Comment 3 Hannes Reinecke 2024-07-03 12:53:15 UTC 
Pushed to users/hare/SLE15-SP6/for-next.
Comment 5 Andrea Mattiazzo 2024-07-03 13:42:49 UTC 
All done, closing.