PCI: mediatek: Fix IRQ domain leak when port fails to enable
- 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- Where the record stands: published, rejected by its publisher, or superseded by another id.What do these mean?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
Summary
In the Linux kernel, the following vulnerability has been resolved: PCI: mediatek: Fix IRQ domain leak when port fails to enable When mtk_pcie_enable_port() fails, mtk_pcie_port_free() removes the port from pcie->ports and frees the port structure. However, the IRQ domains set up earlier by mtk_pcie_init_irq_domain() are never freed. Fix this by refactoring mtk_pcie_irq_teardown() into a per-port helper, mtk_pcie_irq_teardown_port(), and calling it from mtk_pcie_setup() when mtk_pcie_enable_port() fails. Since the IRQ teardown must only happen in the probe error path (during resume, child devices may have active MSI mappings and the NOIRQ context prohibits sleeping locks), mtk_pcie_enable_port() is changed to return an error code so callers can distinguish the two paths and act accordingly. This issue was reported by Sashiko while reviewing the EcoNet EN7528 SoC support series.
Timeline
- CVE published
- Record last updated
Affected versions
- Linux Linux
Version range not reported
- Linux Linux
4.14
References 8
git.kernel.org
- stable/c/e23da72ef202654a7d5269885c4fa39a8404db76
- stable/c/ec7c05eed47d8b15c45380aee7ca168a82e15035
- stable/c/1fbe8972a39548a633d06d7b03a01b7b119a2c12
- stable/c/fe8c701a53c2816cd82301f66c671d952003c1b0
- stable/c/ce52e494a7555bdae1d990a2654fd7547ef6d986
- stable/c/6e6a529d6f779413379b4404c9ef6a36c0337225
- stable/c/df77314b3bedbd9ad5d6f0682f98b99e3c5f7e2e
- stable/c/f865a57896bd92d7662eb2818d8f48872e2cbbc7