gpio: xilinx: fix runtime PM leak on request error path
- 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- Where the record stands: published, rejected by its publisher, or superseded by another id.What do these mean?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
- Fix
- Fixed in 6.6.160, 6.12.113, 6.18.57, 7.2.11
- 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: gpio: xilinx: fix runtime PM leak on request error path pm_runtime_get_sync() leaves the usage counter incremented even when it fails, and xgpio_request() returns the error without dropping it. gpiolib does not call ->free() when ->request() fails, so xgpio_free(), which holds the only matching pm_runtime_put(), never runs. The reference is leaked and the controller can no longer runtime-suspend, so its clock stays enabled. Switch to pm_runtime_resume_and_get(), which only increments the usage counter on success.
Timeline
- CVE published
- First seen by cve.now
Affected versions
- Linux Linux
From 26b04774621ed333e8bc56479feb6e31625df58c · fixed in b07b3925f676640103b3d74b93fc401b1c873d13; From 26b04774621ed333e8bc56479feb6e31625df58c · fixed in f73ee2bd2293f8cc340061c5229395ace71fc2eb; From 26b04774621ed333e8bc56479feb6e31625df58c · fixed in a027e0d7765d1531ee39e4dae81951b04f32ba7b; From 26b04774621ed333e8bc56479feb6e31625df58c · fixed in 2fd6ecda5d1f47cffcfadddb35ee49402162c724; From 26b04774621ed333e8bc56479feb6e31625df58c · fixed in ff82fc3a4a1d417dee1229681cc5285986edb1fa
- Linux Linux
5.12
- KernelLinux
From 5.12.0 · fixed in 6.6.160; From 6.7.0 · fixed in 6.12.113; From 6.13.0 · fixed in 6.18.57; From 6.19.0 · fixed in 7.2.11