Tracker / CVE-2024-49957
CVE-2024-49957
Medium 5.5
In the Linux kernel, the following vulnerability has been resolved: ocfs2: fix null-ptr-deref when journal load failed. During the mounting process, if journal_reset() fails because of too short journal, then lead to jbd2_journal_load() fails with NULL j_sb_buffer. Subsequently, ocfs2_journal_shutdown() calls jbd2_journal_flush()->jbd2_cleanup_journal_tail()-> __jbd2_update_log_tail()->jbd2_journal_update_sb_log_tail() ->lock_buffer(journal->j_sb_buffer), resulting in a null-pointer dereference error. To resolve this issue, we should check the JBD2_LOADED flag to ensure the journal was properly loaded. Additionally, use journal instead of osb->journal directly to simplify the code.
Affected products and versions
| linux | linux_kernel · 2.6.32 → 5.10.227 |
|---|---|
| linux | linux_kernel · 5.11 → 5.15.168 |
| linux | linux_kernel · 5.16 → 6.1.113 |
| linux | linux_kernel · 6.11 → 6.11.3 |
| linux | linux_kernel · 6.2 → 6.6.55 |
| linux | linux_kernel · 6.7 → 6.10.14 |
Analysis
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