Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: mmc: mxcmmc: cancel data work and watchdog on remove mxcmci_remove() frees the host through the devm tail, but neither it nor mmc_remove_host() drains the driver's own asynchronous state. host->watchdog, a 10 s timer armed on the DMA path in mxcmci_setup_data(), is deleted only by the DMA- and IRQ-complete paths, which the remove path does not explicitly drain; it can therefore fire after the host is freed and dereference it in mxcmci_watchdog(). host->datawork, armed from the IRQ handler on the PIO path, is not cancelled by the remove path either. Free the devm-registered IRQ, then cancel datawork and delete the watchdog in mxcmci_remove(), before dma_release_channel(). Freeing the IRQ first keeps a trailing handler from re-arming datawork between the cancel and the host free. Both callbacks are non-self-rearming. This issue was found by an in-house static analysis tool.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected f6ad0a481342223b2e7ae9f55b154e14f1391ada before 740f595f8ad678cb4d79f13edd12851df2492bdd; affected f6ad0a481342223b2e7ae9f55b154e14f1391ada before d3641afe6ee76d852834a34ef0669eefced32752; affected f6ad0a481342223b2e7ae9f55b154e14f1391ada before 314966b490323bdcfd3162a1398b00e587e0ced4; affected f6ad0a481342223b2e7ae9f55b154e14f1391ada before ae10838a7cdf0e54caa9d0a4f488704fd04e7f01; affected f6ad0a481342223b2e7ae9f55b154e14f1391ada before a1ff367e0dc961d73707add508a95df5c3509bd1; affected f6ad0a481342223b2e7ae9f55b154e14f1391ada before 23383e0578b58ba2dc0730cf9f7806bd66bf859a; affected f6ad0a481342223b2e7ae9f55b154e14f1391ada before e2948c4232209e87c861a680f20f1e3cf8a57fec; affected f6ad0a481342223b2e7ae9f55b154e14f1391ada before d3a421c82412344022982d5b91ba23194a0a6f29 |
| Linux / Linux | affected 3.7; unaffected 0 before 3.7; unaffected 5.10.271 through 5.10.*; unaffected 5.15.222 through 5.15.*; unaffected 6.1.189 through 6.1.*; 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/740f595f8ad678cb4d79f13edd12851df2492bdd
- https://git.kernel.org/stable/c/d3641afe6ee76d852834a34ef0669eefced32752
- https://git.kernel.org/stable/c/314966b490323bdcfd3162a1398b00e587e0ced4
- https://git.kernel.org/stable/c/ae10838a7cdf0e54caa9d0a4f488704fd04e7f01
- https://git.kernel.org/stable/c/a1ff367e0dc961d73707add508a95df5c3509bd1
- https://git.kernel.org/stable/c/23383e0578b58ba2dc0730cf9f7806bd66bf859a
- https://git.kernel.org/stable/c/e2948c4232209e87c861a680f20f1e3cf8a57fec
- https://git.kernel.org/stable/c/d3a421c82412344022982d5b91ba23194a0a6f29