Description
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 products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
Linux Linux
Default version status: unaffected
f6ad0a481342223b2e7ae9f55b154e14f1391ada to < 740f595f8ad678cb4d79f13edd12851df2492bddaffectedf6ad0a481342223b2e7ae9f55b154e14f1391ada to < d3641afe6ee76d852834a34ef0669eefced32752affectedf6ad0a481342223b2e7ae9f55b154e14f1391ada to < 314966b490323bdcfd3162a1398b00e587e0ced4affectedf6ad0a481342223b2e7ae9f55b154e14f1391ada to < ae10838a7cdf0e54caa9d0a4f488704fd04e7f01affectedf6ad0a481342223b2e7ae9f55b154e14f1391ada to < a1ff367e0dc961d73707add508a95df5c3509bd1affectedf6ad0a481342223b2e7ae9f55b154e14f1391ada to < 23383e0578b58ba2dc0730cf9f7806bd66bf859aaffectedf6ad0a481342223b2e7ae9f55b154e14f1391ada to < e2948c4232209e87c861a680f20f1e3cf8a57fecaffectedf6ad0a481342223b2e7ae9f55b154e14f1391ada to < d3a421c82412344022982d5b91ba23194a0a6f29affected
Linux Linux
Default version status: affected
3.7affected0 to < 3.7unaffected5.10.271 to ≤ 5.10.*unaffected5.15.222 to ≤ 5.15.*unaffected6.1.189 to ≤ 6.1.*unaffected6.6.158 to ≤ 6.6.*unaffected6.12.112 to ≤ 6.12.*unaffected6.18.54 to ≤ 6.18.*unaffected7.2.8 to ≤ 7.2.*unaffected7.3 to ≤ *unaffected
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 ↗