iio: light: gp2ap002: Fix unbalanced runtime PM on repeated event writes

Summary

In the Linux kernel, the following vulnerability has been resolved: iio: light: gp2ap002: Fix unbalanced runtime PM on repeated event writes The IIO core does not filter duplicate writes to the event enable attribute, so writing the same value twice invokes write_event_config() twice. Enabling twice leaks a runtime PM reference, preventing the device from ever suspending again; disabling twice underflows the usage count and triggers a "Runtime PM usage count underflow" warning. Bail out early when the requested state matches the current state. While at it, switch to pm_runtime_resume_and_get() so a failed resume is propagated to userspace instead of silently marking the event enabled.

Timeline

1. Sep 17, 2026, 4:07 PM UTCCVE published
2. Oct 19, 2026, 9:00 AM UTCRecord last updated

Affected versions

• Linux Linux

  From 97d642e23037c5545266f9564c9b81e6db81b122 · fixed in b2d7a97d75b648a643f60d77f4d6d70161268855; From 97d642e23037c5545266f9564c9b81e6db81b122 · fixed in 685d9d1e5c47e024413981fb7eddab86132b04a1; From 97d642e23037c5545266f9564c9b81e6db81b122 · fixed in 56fe8e5f313a64e458bb6f8b982de925345e21a7; From 97d642e23037c5545266f9564c9b81e6db81b122 · fixed in 8e76ab81319858736ccf23141e9415f9a1869337; From 97d642e23037c5545266f9564c9b81e6db81b122 · fixed in 70b9482926ca92862460e659f5e5fde99ae0b4fa; From 97d642e23037c5545266f9564c9b81e6db81b122 · fixed in 0fc740c25c9abb25113398ebb58e2f2ce57741a7; From 97d642e23037c5545266f9564c9b81e6db81b122 · fixed in 470edb012b1d9a4fba1cd59e329e60f0798c791a; From 97d642e23037c5545266f9564c9b81e6db81b122 · fixed in 579c049b4cb6fc72ce2c505fc5334540be0efcd3

• Linux Linux

  5.7

• KernelLinux

  From 5.7.0 · fixed in 5.10.270; From 5.11.0 · fixed in 5.15.221; From 5.16.0 · fixed in 6.1.188; From 6.2.0 · fixed in 6.6.157; From 6.7.0 · fixed in 6.12.110; From 6.13.0 · fixed in 6.18.52; From 6.19.0 · fixed in 7.2.6

References 8