diff options
| author | Samuel Wu <wusamuel@google.com> | 2026-01-23 17:21:29 -0800 |
|---|---|---|
| committer | Sasha Levin <sashal@kernel.org> | 2026-03-04 07:19:25 -0500 |
| commit | 8cdef9ca5b78e383712330572865e9f91fa5f1a7 (patch) | |
| tree | 4ebbb44cf330808ae1e44e6f8b7665e7d062e039 /drivers/base | |
| parent | 4b4dff498f46e9802f71bc84258bf73065f51c6a (diff) | |
PM: wakeup: Handle empty list in wakeup_sources_walk_start()
[ Upstream commit 75ce02f4bc9a8b8350b6b1b01872467b0cc960cc ]
In the case of an empty wakeup_sources list, wakeup_sources_walk_start()
will return an invalid but non-NULL address. This also affects wrappers
of the aforementioned function, like for_each_wakeup_source().
Update wakeup_sources_walk_start() to return NULL in case of an empty
list.
Fixes: b4941adb24c0 ("PM: wakeup: Add routine to help fetch wakeup source object.")
Signed-off-by: Samuel Wu <wusamuel@google.com>
[ rjw: Subject and changelog edits ]
Link: https://patch.msgid.link/20260124012133.2451708-2-wusamuel@google.com
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'drivers/base')
| -rw-r--r-- | drivers/base/power/wakeup.c | 4 |
1 files changed, 1 insertions, 3 deletions
diff --git a/drivers/base/power/wakeup.c b/drivers/base/power/wakeup.c index a917219feea6..eae81def0902 100644 --- a/drivers/base/power/wakeup.c +++ b/drivers/base/power/wakeup.c @@ -280,9 +280,7 @@ EXPORT_SYMBOL_GPL(wakeup_sources_read_unlock); */ struct wakeup_source *wakeup_sources_walk_start(void) { - struct list_head *ws_head = &wakeup_sources; - - return list_entry_rcu(ws_head->next, struct wakeup_source, entry); + return list_first_or_null_rcu(&wakeup_sources, struct wakeup_source, entry); } EXPORT_SYMBOL_GPL(wakeup_sources_walk_start); |