Bug 2324862 (CVE-2024-50218)

Summary: CVE-2024-50218 kernel: ocfs2: pass u64 to ocfs2_truncate_inline maybe overflow
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
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Priority: medium    
Version: unspecifiedCC: dfreiber, drow, jburrell, vkumar
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Hardware: All   
OS: Linux   
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Bug Depends On: 2325082    
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Description OSIDB Bzimport 2024-11-09 11:01:53 UTC 
In the Linux kernel, the following vulnerability has been resolved:

ocfs2: pass u64 to ocfs2_truncate_inline maybe overflow

Syzbot reported a kernel BUG in ocfs2_truncate_inline.  There are two
reasons for this: first, the parameter value passed is greater than
ocfs2_max_inline_data_with_xattr, second, the start and end parameters of
ocfs2_truncate_inline are "unsigned int".

So, we need to add a sanity check for byte_start and byte_len right before
ocfs2_truncate_inline() in ocfs2_remove_inode_range(), if they are greater
than ocfs2_max_inline_data_with_xattr return -EINVAL.
Comment 1 Avinash Hanwate 2024-11-11 04:37:16 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2024110925-CVE-2024-50218-68cd@gregkh/T