Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: gpio: shared: fix deadlock on shared proxy's parent removal Commit 710abda58055 ("gpio: shared: call gpio_chip::of_xlate() if set") used the mutex embedded in struct gpio_shared_entry to protect the offset field which now can be modified after assignment. The critical section however is too wide and introduced a potential deadlock on the removal of the shared GPIO proxy's parent. Make the critical section shorter - only protect the offset when it's being read. While at it: mention the fact that the entry lock is now also used to protect against concurrent access to the offset field in the structure's documentation.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 710abda58055ed5eaa8958107633cc12a365c328 before a554dfcd30dd5e41d1d67387b3bb85cea83e12e1; affected 710abda58055ed5eaa8958107633cc12a365c328 before a1b836607304f71051f9f9dcccf8b5097b86a1fb; affected 28f488e7b327630686378bb1d24e22cfc3fc162d; affected 6.19.12 before 6.20 |
| Linux / Linux | affected 7.0; unaffected 0 before 7.0; unaffected 7.0.12 through 7.0.*; unaffected 7.1 through * |
CWE
No CWE identifiers supplied.