In the Linux kernel, the following vulnerability has been resolved: ALSA: timer: Set lower bound of start tick time Currently ALSA timer doesn’t have the lower limit of the start tick time, and it allows a very small size, e.g. 1 tick with 1ns resolution for hrtimer. Such a situation may lead to an unexpected RCU stall, where the callback repeatedly queuing the expire update, as reported by fuzzer. This patch introduces a sanity check of the timer start tick time, so that the system returns an error when a too small start size is set. As of this patch, the lower limit is hard-coded to 100us, which is small enough but can still work somehow.
OS | Version | Architecture | Package | Version | Filename |
---|---|---|---|---|---|
Debian | 12 | all | linux | < 6.1.94-1 | linux_6.1.94-1_all.deb |
Debian | 11 | all | linux | < 5.10.221-1 | linux_5.10.221-1_all.deb |
Debian | 999 | all | linux | < 6.9.7-1 | linux_6.9.7-1_all.deb |
Debian | 13 | all | linux | < 6.9.7-1 | linux_6.9.7-1_all.deb |