Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: mmc: hsq: Fix use-after-free in retry work mmc_hsq_pump_requests() queues retry_work when request_atomic() returns -EBUSY; today sdhci-sprd is the only consumer that implements request_atomic(). The work is embedded in a devm-allocated mmc_hsq, but is never cancelled during driver removal. Work still pending at unbind can therefore run after the devm allocation has been released and dereference hsq->mmc and hsq->mrq. Use devm_work_autocancel() to cancel and drain retry_work before the devm allocation is released. By the time devres cleanup begins, mmc_remove_host() has already stopped the host, so no new requests can arm the work. This issue was found by an in-house static analysis tool.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 6db96e5810e0a6a345b7d78549de7676ae5b2662 before c50d6515bffb148c2c12be6d587ec201dfab4c34; affected 6db96e5810e0a6a345b7d78549de7676ae5b2662 before df2eb59fd9eb33663dc1053f5a4ed851e0aa1f67; affected 6db96e5810e0a6a345b7d78549de7676ae5b2662 before 8439bf262ce3267bcfee29d3c61605f1731a2271; affected 6db96e5810e0a6a345b7d78549de7676ae5b2662 before 45341b341642c377192c95e4d48e0a859cf85f42; affected 6db96e5810e0a6a345b7d78549de7676ae5b2662 before 5d132990475f02cfa1debe03d50b479432864ebd |
| Linux / Linux | affected 5.8; unaffected 0 before 5.8; unaffected 6.6.158 through 6.6.*; unaffected 6.12.112 through 6.12.*; unaffected 6.18.54 through 6.18.*; unaffected 7.2.8 through 7.2.*; unaffected 7.3 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/c50d6515bffb148c2c12be6d587ec201dfab4c34
- https://git.kernel.org/stable/c/df2eb59fd9eb33663dc1053f5a4ed851e0aa1f67
- https://git.kernel.org/stable/c/8439bf262ce3267bcfee29d3c61605f1731a2271
- https://git.kernel.org/stable/c/45341b341642c377192c95e4d48e0a859cf85f42
- https://git.kernel.org/stable/c/5d132990475f02cfa1debe03d50b479432864ebd