Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: ocfs2: fix buffer head management in ocfs2_read_blocks() In ocfs2_read_blocks(), caller should't assume that buffer head returned by 'sb_getblk()' is exclusively owned and so 'put_bh()' always drops b_count from 1 to 0. If it is not so, buffer head remains on hold and likely to be returned by the next call to 'sb_getblk()' unchanged - that is, with BH_Uptodate bit set even if it has failed validation previously, thus allowing to insert that buffer head into OCFS2 metadata cache and submit it to upper layers. To avoid such a scenario, BH_Uptodate should be cleared immediately after 'validate()' callback has detected some data inconsistency.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected cf76c78595ca87548ca5e45c862ac9e0949c4687 before a4eae1499c760949a93459d11390bd1fd823d31d; affected cf76c78595ca87548ca5e45c862ac9e0949c4687 before 4ab17e328522a4df5fe0f0dcf39098118b1feeaa; affected cf76c78595ca87548ca5e45c862ac9e0949c4687 before 5927acb3e2c99985a14adecd9d1b67ba191c622d; affected cf76c78595ca87548ca5e45c862ac9e0949c4687 before ecb3f9386f4353034caef77239473c627232db17; affected cf76c78595ca87548ca5e45c862ac9e0949c4687 before 61f7a5acb3bf8fc97dad78f54b1e8d0e1c819766; affected cf76c78595ca87548ca5e45c862ac9e0949c4687 before 0e389fc290c350c67591abf4c367119f4689f310; affected cf76c78595ca87548ca5e45c862ac9e0949c4687 before 9e7a057934cdd58e4cc94350bcfe5367bbee0f8e; affected cf76c78595ca87548ca5e45c862ac9e0949c4687 before 6371a07148ee979af22a9d6f4c277462953a9a4a; affected 01f93d5e36753fc4d06ec67f05ce78c9c6f2dd56; affected 65cbd1279f4b999d56a838344a30642db24cd215; affected 97e1db17bc1ef4c2e1789bc9323c7be44fba53f8; affected 6c150df9c2e80b5cf86f5a0d98beb7390ad63bfc; affected 4.4.204 before 4.5; affected 4.9.204 before 4.10; affected 4.14.157 before 4.15; affected 4.19.87 before 4.20 |
| Linux / Linux | affected 4.20; unaffected 0 before 4.20; unaffected 5.10.261 through 5.10.*; unaffected 5.15.212 through 5.15.*; unaffected 6.1.178 through 6.1.*; unaffected 6.6.145 through 6.6.*; unaffected 6.12.97 through 6.12.*; unaffected 6.18.40 through 6.18.*; unaffected 7.1.5 through 7.1.*; unaffected 7.2 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/a4eae1499c760949a93459d11390bd1fd823d31d
- https://git.kernel.org/stable/c/4ab17e328522a4df5fe0f0dcf39098118b1feeaa
- https://git.kernel.org/stable/c/5927acb3e2c99985a14adecd9d1b67ba191c622d
- https://git.kernel.org/stable/c/ecb3f9386f4353034caef77239473c627232db17
- https://git.kernel.org/stable/c/61f7a5acb3bf8fc97dad78f54b1e8d0e1c819766
- https://git.kernel.org/stable/c/0e389fc290c350c67591abf4c367119f4689f310
- https://git.kernel.org/stable/c/9e7a057934cdd58e4cc94350bcfe5367bbee0f8e
- https://git.kernel.org/stable/c/6371a07148ee979af22a9d6f4c277462953a9a4a