Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: PM: sleep: Drop spurious WARN_ON() from pm_restore_gfp_mask() Commit 35e4a69b2003f ("PM: sleep: Allow pm_restrict_gfp_mask() stacking") introduced refcount-based GFP mask management that warns when pm_restore_gfp_mask() is called with saved_gfp_count == 0. Some hibernation paths call pm_restore_gfp_mask() defensively where the GFP mask may or may not be restricted depending on the execution path. For example, the uswsusp interface invokes it in SNAPSHOT_CREATE_IMAGE, SNAPSHOT_UNFREEZE, and snapshot_release(). Before the stacking change this was a silent no-op; it now triggers a spurious WARNING. Remove the WARN_ON() wrapper from the !saved_gfp_count check while retaining the check itself, so that defensive calls remain harmless without producing false warnings. [ rjw: Subject tweak ]
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 35e4a69b2003f20a69e7d19ae96ab1eef1aa8e8d before 3025ca5daa9d682b629c0c958b538e41deeb559d; affected 35e4a69b2003f20a69e7d19ae96ab1eef1aa8e8d before f19d1323aa3dd7ead469aef47d9085f8939565d9; affected 35e4a69b2003f20a69e7d19ae96ab1eef1aa8e8d before a8d51efb5929ae308895455a3e496b5eca2cd143; affected 4ddf7293928cb619077724b7d828734da8181e6c; affected 6.17.8 before 6.18 |
| Linux / Linux | affected 6.18; unaffected 0 before 6.18; unaffected 6.18.21 through 6.18.*; unaffected 6.19.11 through 6.19.*; unaffected 7.0 through * |
CWE
No CWE identifiers supplied.