CVE-2025-39842
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.
| Software | From | Fixed in |
|---|---|---|
| linux / linux_kernel | 5.16 | 6.1.151 |
| linux / linux_kernel | 6.2 | 6.6.105 |
| linux / linux_kernel | 6.7 | 6.12.46 |
| linux / linux_kernel | 6.13 | 6.16.6 |
| linux / linux_kernel | 6.17-rc1 | 6.17-rc1.x |
| linux / linux_kernel | 6.17-rc2 | 6.17-rc2.x |
| linux / linux_kernel | 6.17-rc3 | 6.17-rc3.x |
| linux / linux_kernel | 6.17-rc4 | 6.17-rc4.x |
| debian / debian_linux | 11.0 | 11.0.x |
- https://git.kernel.org/stable/c/42c415c53ad2065088cc411d08925effa5b3d255
- https://git.kernel.org/stable/c/85e66331b60601d903cceaf8c10a234db863cd78
- https://git.kernel.org/stable/c/e9188f66e94955431ddbe2cd1cdf8ff2bb486abf
- https://git.kernel.org/stable/c/f46e8ef8bb7b452584f2e75337b619ac51a7cadf
- https://git.kernel.org/stable/c/f4a917e6cd6c798f7adf39907f117fc754db1283
- https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html
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