Description
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 products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
Linux Linux
Default version status: unaffected
35e4a69b2003f20a69e7d19ae96ab1eef1aa8e8d to < 3025ca5daa9d682b629c0c958b538e41deeb559daffected35e4a69b2003f20a69e7d19ae96ab1eef1aa8e8d to < f19d1323aa3dd7ead469aef47d9085f8939565d9affected35e4a69b2003f20a69e7d19ae96ab1eef1aa8e8d to < a8d51efb5929ae308895455a3e496b5eca2cd143affected4ddf7293928cb619077724b7d828734da8181e6caffected6.17.8 to < 6.18affected
Linux Linux
Default version status: affected
6.18affected0 to < 6.18unaffected6.18.21 to ≤ 6.18.*unaffected6.19.11 to ≤ 6.19.*unaffected7.0 to ≤ *unaffected