[PATCH v6 0/3] coresight: prevent deactivate active config while enabling the config

[Suzuki K Poulose]

On Wed, 14 May 2025 17:19:48 +0100, Yeoreum Yun wrote:
> While enable active config via cscfg_csdev_enable_active_config(),
> active config could be deactivated via configfs' sysfs interface.
> This could make UAF issue in below scenario:
> 
> CPU0                                          CPU1
> (sysfs enable)                                load module
>                                               cscfg_load_config_sets()
>                                               activate config. // sysfs
>                                               (sys_active_cnt == 1)
> ...
> cscfg_csdev_enable_active_config()
> lock(csdev->cscfg_csdev_lock)
> // here load config activate by CPU1
> unlock(csdev->cscfg_csdev_lock)
> 
> [...]

Applied, thanks!

[1/3] coresight/etm4: fix missing disable active config
      https://git.kernel.org/coresight/c/895b12b7
[2/3] coresight: holding cscfg_csdev_lock while removing cscfg from csdev
      https://git.kernel.org/coresight/c/53b9e265
[3/3] coresight: prevent deactivate active config while enabling the config
      https://git.kernel.org/coresight/c/408c97c4

Best regards,
-- 
Suzuki K Poulose <suzuki.poulose at arm.com>