CVE-2022-50417
Description
In the Linux kernel, the following vulnerability has been resolved: drm/panfrost: Fix GEM handle creation ref-counting panfrost_gem_create_with_handle() previously returned a BO but with the only reference being from the handle, which user space could in theory guess and release, causing a use-after-free. Additionally if the call to panfrost_gem_mapping_get() in panfrost_ioctl_create_bo() failed then a(nother) reference on the BO was dropped. The _create_with_handle() is a problematic pattern, so ditch it and instead create the handle in panfrost_ioctl_create_bo(). If the call to panfrost_gem_mapping_get() fails then this means that user space has indeed gone behind our back and freed the handle. In which case just return an error code.
How to fix
- linux linux_kernel5.10.163, 5.15.87, 6.0.19, 6.1.5 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| linux linux_kernel | 5.2 ≤ v < 5.10.163, 5.11 ≤ v < 5.15.87, 5.16 ≤ v < 6.0.19, 6.1 ≤ v < 6.1.5, 6.2 | 5.10.163, 5.15.87, 6.0.19, 6.1.5 |
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