Description
In the Linux kernel, the following vulnerability has been resolved: serial: 8250: fix possible ISR soft lockup There are rare cases in which the host gets stuck in the ISR because it is flooded with messages during the startup phase. The reason for the soft lockup in the ISR is the missing FIFO error IRQ (FIFOE) handling. Not handling it and reporting IRQ_HANDLED triggers the IRQ immediately again. Fix this by adding a check for the FIFOE status and clearing the FIFO if no data is ready (DR). This behavior was observed on an AM62L device which uses the OMAP 8250 driver. Fix it for all 8250 drivers, since the OMAP driver's special IRQ setup handling may trigger this behavior more frequently, but it is not ensured that other 8250 drivers aren't affected.
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
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to < 4bce4a6f6318035d77d6b6199527b1950bb015f4affected1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to < 8b67af8cd90542b2607623e3282811849e191b79affected1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to < 95d0b40c0623fd2b58c753f8dd6adda7263e3cd1affected1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to < 03ed804a0ddc3d069faf94c47f9e702afe5ca084affected1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to < 2881b2e6da02daea1eb8254247ba8fd20c9d3348affected1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to < 4295c58990b7a84e8349a2226db692e252825b60affected1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to < 0c6bf45e5a345cc3b9ffbeaf9083ecac3c2293ebaffected
Linux Linux
Default version status: affected
2.6.12affected0 to < 2.6.12unaffected5.10.271 to ≤ 5.10.*unaffected5.15.222 to ≤ 5.15.*unaffected6.1.189 to ≤ 6.1.*unaffected6.6.158 to ≤ 6.6.*unaffected6.12.111 to ≤ 6.12.*unaffected6.18.53 to ≤ 6.18.*unaffected7.2 to ≤ *unaffected
References
- https://git.kernel.org/stable/c/4bce4a6f6318035d77d6b6199527b1950bb015f4 ↗
- https://git.kernel.org/stable/c/8b67af8cd90542b2607623e3282811849e191b79 ↗
- https://git.kernel.org/stable/c/95d0b40c0623fd2b58c753f8dd6adda7263e3cd1 ↗
- https://git.kernel.org/stable/c/03ed804a0ddc3d069faf94c47f9e702afe5ca084 ↗
- https://git.kernel.org/stable/c/2881b2e6da02daea1eb8254247ba8fd20c9d3348 ↗
- https://git.kernel.org/stable/c/4295c58990b7a84e8349a2226db692e252825b60 ↗
- https://git.kernel.org/stable/c/0c6bf45e5a345cc3b9ffbeaf9083ecac3c2293eb ↗