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CVE-2025-39842 In the Linux kernel, the following vulnerability has been resolved: ocfs2: prevent release journal inode after journal…

Description

In the Linux kernel, the following vulnerability has been resolved: ocfs2: prevent release journal inode after journal shutdown Before calling ocfs2_delete_osb(), ocfs2_journal_shutdown() has already been executed in ocfs2_dismount_volume(), so osb->journal must be NULL. Therefore, the following calltrace will inevitably fail when it reaches jbd2_journal_release_jbd_inode(). ocfs2_dismount_volume()-> ocfs2_delete_osb()-> ocfs2_free_slot_info()-> __ocfs2_free_slot_info()-> evict()-> ocfs2_evict_inode()-> ocfs2_clear_inode()-> jbd2_journal_release_jbd_inode(osb->journal->j_journal, Adding osb->journal checks will prevent null-ptr-deref during the above execution path.

Affected products and versions

Product Affected versions Fixed in
Linux 6.17 earliest → < 6.17 6.17
Linux 6.16 earliest → < 6.16.6 6.16.6
Linux 6.12 earliest → < 6.12.46 6.12.46
Linux 6.6 earliest → < 6.6.105 6.6.105
Linux 6.1 earliest → < 6.1.151 6.1.151
Linux 5.16 No fix stated
SIMATIC CN 4100 5.0 earliest → < 5.0 5.0

References

Timeline

  1. Published
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