Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: bfq: Make sure bfqg for which we are queueing requests is online Bios queued into BFQ IO scheduler can be associated with a cgroup that was already offlined. This may then cause insertion of this bfq_group into a service tree. But this bfq_group will get freed as soon as last bio associated with it is completed leading to use after free issues for service tree users. Fix the problem by making sure we always operate on online bfq_group. If the bfq_group associated with the bio is not online, we pick the first online parent.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected e21b7a0b988772e82e7147e1c659a5afe2ae003c before ccddf8cd411c1800863ed357064e56ceffd356bb; affected e21b7a0b988772e82e7147e1c659a5afe2ae003c before 51f724bffa3403a5236597e6b75df7329c1ec6e9; affected e21b7a0b988772e82e7147e1c659a5afe2ae003c before 6ee0868b0c3ccead5907685fcdcdd0c08dfe4b0b; affected e21b7a0b988772e82e7147e1c659a5afe2ae003c before 97bd6c56bdcb41079e488e31df56809e3b2ce628; affected e21b7a0b988772e82e7147e1c659a5afe2ae003c before 7781c38552e6cc54ed8e9040279561340516b881; affected e21b7a0b988772e82e7147e1c659a5afe2ae003c before 075a53b78b815301f8d3dd1ee2cd99554e34f0dd |
| Linux / Linux | affected 4.12; unaffected 0 before 4.12; unaffected 5.4.198 through 5.4.*; unaffected 5.10.121 through 5.10.*; unaffected 5.15.46 through 5.15.*; unaffected 5.17.14 through 5.17.*; unaffected 5.18.3 through 5.18.*; unaffected 5.19 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/ccddf8cd411c1800863ed357064e56ceffd356bb
- https://git.kernel.org/stable/c/51f724bffa3403a5236597e6b75df7329c1ec6e9
- https://git.kernel.org/stable/c/6ee0868b0c3ccead5907685fcdcdd0c08dfe4b0b
- https://git.kernel.org/stable/c/97bd6c56bdcb41079e488e31df56809e3b2ce628
- https://git.kernel.org/stable/c/7781c38552e6cc54ed8e9040279561340516b881
- https://git.kernel.org/stable/c/075a53b78b815301f8d3dd1ee2cd99554e34f0dd
ADP enrichment
No English description supplied.
No references supplied.