CVE-2022-48633

/// Technical description

In the Linux kernel, the following vulnerability has been resolved:

drm/gma500: Fix WARN_ON(lock->magic != lock) error

psb_gem_unpin() calls dma_resv_lock() but the underlying ww_mutex

gets destroyed by drm_gem_object_release() move the

drm_gem_object_release() call in psb_gem_free_object() to after

the unpin to fix the below warning:

[ 79.693962] ------------[ cut here ]------------

[ 79.693992] DEBUG_LOCKS_WARN_ON(lock->magic != lock)

[ 79.694015] WARNING: CPU: 0 PID: 240 at kernel/locking/mutex.c:582 __ww_mutex_lock.constprop.0+0x569/0xfb0

[ 79.694052] Modules linked in: rfcomm snd_seq_dummy snd_hrtimer qrtr bnep ath9k ath9k_common ath9k_hw snd_hda_codec_realtek snd_hda_codec_generic ledtrig_audio snd_hda_codec_hdmi snd_hda_intel ath3k snd_intel_dspcfg mac80211 snd_intel_sdw_acpi btusb snd_hda_codec btrtl btbcm btintel btmtk bluetooth at24 snd_hda_core snd_hwdep uvcvideo snd_seq libarc4 videobuf2_vmalloc ath videobuf2_memops videobuf2_v4l2 videobuf2_common snd_seq_device

/// Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

/// References