Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: quota: Fix race of dquot_scan_active() with quota deactivation dquot_scan_active() can race with quota deactivation in quota_release_workfn() like: CPU0 (quota_release_workfn) CPU1 (dquot_scan_active) ============================== ============================== spin_lock(&dq_list_lock); list_replace_init( &releasing_dquots, &rls_head); /* dquot X on rls_head, dq_count == 0, DQ_ACTIVE_B still set */ spin_unlock(&dq_list_lock); synchronize_srcu(&dquot_srcu); spin_lock(&dq_list_lock); list_for_each_entry(dquot, &inuse_list, dq_inuse) { /* finds dquot X */ dquot_active(X) -> true atomic_inc(&X->dq_count); } spin_unlock(&dq_list_lock); spin_lock(&dq_list_lock); dquot = list_first_entry(&rls_head); WARN_ON_ONCE(atomic_read(&dquot->dq_count)); The problem is not only a cosmetic one as under memory pressure the caller of dquot_scan_active() can end up working on freed dquot. Fix the problem by making sure the dquot is removed from releasing list when we acquire a reference to it.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 22c06bf1f99ec3ec16b1a81342becba4c59a1f16 before 2bdc80f4619411e5bd4a3ef23f51e14021ed457c; affected 56e96b38d2f7cd95b3c30eb70decac7233915e0a before f9438cb8c8ec3adc84b2b450a3aab0123d074c3b; affected 12a820a9923c11e8e898da9f82c8aded70cdcd16 before ac8a2e0d287ebf35e5d7e51e260b4e146648ba4a; affected 869b6ea1609f655a43251bf41757aa44e5350a8f before 6678dde265708003c2b42551af4a2e3cb05decd5; affected 869b6ea1609f655a43251bf41757aa44e5350a8f before 61e25f664dc2a08299e07d84c85776abc2350f75; affected 869b6ea1609f655a43251bf41757aa44e5350a8f before fdd424d7c35633ac577fd87d1b043d1b8a6cd350; affected 869b6ea1609f655a43251bf41757aa44e5350a8f before 82cbdb4c1ebb5ea7d7bd45c18d3483b5bd32ebc1; affected 869b6ea1609f655a43251bf41757aa44e5350a8f before e93ab401da4b2e2c1b8ef2424de2f238d51c8b2d; affected bb7e3a019b52d829949d02b64ebab37838148fbf; affected 061a18239ced5eb086967a2b4451cb1cc5ce0702; affected 2a1ddddba6541143c8f73962f3021f1789114284; affected 5.10.199 before 5.10.258; affected 5.15.136 before 5.15.209; affected 6.1.59 before 6.1.175; affected 4.19.297 before 4.20; affected 5.4.259 before 5.5; affected 6.5.8 before 6.6 |
| Linux / Linux | affected 6.6; unaffected 0 before 6.6; unaffected 5.10.258 through 5.10.*; unaffected 5.15.209 through 5.15.*; unaffected 6.1.175 through 6.1.*; unaffected 6.6.141 through 6.6.*; unaffected 6.12.91 through 6.12.*; unaffected 6.18.33 through 6.18.*; unaffected 7.0.10 through 7.0.*; unaffected 7.1 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/2bdc80f4619411e5bd4a3ef23f51e14021ed457c
- https://git.kernel.org/stable/c/f9438cb8c8ec3adc84b2b450a3aab0123d074c3b
- https://git.kernel.org/stable/c/ac8a2e0d287ebf35e5d7e51e260b4e146648ba4a
- https://git.kernel.org/stable/c/6678dde265708003c2b42551af4a2e3cb05decd5
- https://git.kernel.org/stable/c/61e25f664dc2a08299e07d84c85776abc2350f75
- https://git.kernel.org/stable/c/fdd424d7c35633ac577fd87d1b043d1b8a6cd350
- https://git.kernel.org/stable/c/82cbdb4c1ebb5ea7d7bd45c18d3483b5bd32ebc1
- https://git.kernel.org/stable/c/e93ab401da4b2e2c1b8ef2424de2f238d51c8b2d
ADP enrichment
No English description supplied.