In the Linux kernel, the following vulnerability has been resolved:
sata_fsl: fix UAF in sata_fsl_port_stop when rmmod sata_fsl
rmmod sata_fsl.ko
command is executed in the PPC64 GNU/Linux,The triggering of the BUG is shown in the following stack:
driver_detach
device_release_driver_internal
__device_release_driver
drv->remove(dev) –> platform_drv_remove/platform_remove
drv->remove(dev) –> sata_fsl_remove
iounmap(host_priv->hcr_base); <---- unmap
kfree(host_priv); <---- free
devres_release_all
release_nodes
dr->node.release(dev, dr->data) –> ata_host_stop
ap->ops->port_stop(ap) –> sata_fsl_port_stop
ioread32(hcr_base + HCONTROL) <---- UAF
host->ops->host_stop(host)
The iounmap(host_priv->hcr_base) and kfree(host_priv) functions should
not be executed in drv->remove. These functions should be executed in
host_stop after port_stop. Therefore, we move these functions to the
new function sata_fsl_host_stop and bind the new function to host_stop.
git.kernel.org/stable/c/0769449b0a5eabc3545337217ae690e46673e73a
git.kernel.org/stable/c/325ea49fc43cbc03a5e1e37de8f0ca6357ced4b1
git.kernel.org/stable/c/4a46b2f5dce02539e88a300800812bd24a45e097
git.kernel.org/stable/c/6c8ad7e8cf29eb55836e7a0215f967746ab2b504
git.kernel.org/stable/c/77393806c76b6b44f1c44bd957788c8bd9152c45
git.kernel.org/stable/c/91ba94d3f7afca195b224f77a72044fbde1389ce
git.kernel.org/stable/c/adf098e2a8a1e1fc075d6a5ba2edd13cf7189082
git.kernel.org/stable/c/cdcd80292106df5cda325426e96495503e41f947