drm/lima: fix shared irq handling on driver remove
- Published
- Last modified
- Where the record stands: published, rejected by its publisher, or superseded by another id.What do these mean? →
- published
- Whether CISA lists it in its Known Exploited Vulnerabilities catalog: proof that attackers are using it.What do these mean? →
- Not listed in CISA KEV
- Whether working attack code is public (Exploit-DB, Metasploit, Nuclei or GitHub). Public code makes attacks easier.What do these mean? →
- None on Exploit-DB, Metasploit or GitHub
- Exploitation: none
- Automatable: no
- Technical impact: partial
Summary
In the Linux kernel, the following vulnerability has been resolved: drm/lima: fix shared irq handling on driver remove lima uses a shared interrupt, so the interrupt handlers must be prepared to be called at any time. At driver removal time, the clocks are disabled early and the interrupts stay registered until the very end of the remove process due to the devm usage. This is potentially a bug as the interrupts access device registers which assumes clocks are enabled. A crash can be triggered by removing the driver in a kernel with CONFIG_DEBUG_SHIRQ enabled. This patch frees the interrupts at each lima device finishing callback so that the handlers are already unregistered by the time we fully disable clocks.
Timeline
- CVE published
- CISA SSVC assessment
Exploitation: none · Automatable: no · Technical impact: partial
- Record last updated
Affected versions
- Linux Linux
Version range not reported
- Linux Linux
5.2
References 7
git.kernel.org
- stable/c/0d60c43df59ef01c08dc7b0c45495178f9d05a13
- stable/c/25d0d9b83d855cbc5d5aa5ae3cd79d55ea0c84a8
- stable/c/17fe8b75aaf0bb1bdc31368963446b421c22d0af
- stable/c/0a487e977cb8897ae4c51ecd34bbaa2b005266c9
- stable/c/04d531b9a1875846d4f89953b469ad463aa7a770
- stable/c/b5daf9217a50636a969bc1965f827878aeb09ffe
- stable/c/a6683c690bbfd1f371510cb051e8fa49507f3f5e