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.
Metrics
Affected Vendors & Products
References
History
Fri, 08 Nov 2024 16:00:00 +0000
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Mon, 28 Oct 2024 16:30:00 +0000
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First Time appeared |
Linux
Linux linux Kernel |
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Weaknesses | CWE-476 | |
CPEs | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | |
Vendors & Products |
Linux
Linux linux Kernel |
Wed, 23 Oct 2024 01:30:00 +0000
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threat_severity
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cvssV3_1
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Tue, 22 Oct 2024 14:15:00 +0000
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ssvc
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Mon, 21 Oct 2024 18:15:00 +0000
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Description | 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. | |
Title | ocfs2: fix null-ptr-deref when journal load failed. | |
References |
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MITRE
Status: PUBLISHED
Assigner: Linux
Published: 2024-10-21T18:02:11.046Z
Updated: 2024-11-19T01:12:39.334Z
Reserved: 2024-10-21T12:17:06.048Z
Link: CVE-2024-49957
Vulnrichment
Updated: 2024-10-22T13:35:39.743Z
NVD
Status : Modified
Published: 2024-10-21T18:15:16.950
Modified: 2024-11-08T16:15:33.963
Link: CVE-2024-49957
Redhat