Patch "fsnotify: Pass group argument to free_event" has been added to the 5.10-stable tree

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This is a note to let you know that I've just added the patch titled

    fsnotify: Pass group argument to free_event

to the 5.10-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     fsnotify-pass-group-argument-to-free_event.patch
and it can be found in the queue-5.10 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.



commit 16b3de404109609dea2c127faa12b7b9724f4948
Author: Gabriel Krisman Bertazi <krisman@xxxxxxxxxxxxx>
Date:   Mon Oct 25 16:27:27 2021 -0300

    fsnotify: Pass group argument to free_event
    
    [ Upstream commit 330ae77d2a5b0af32c0f29e139bf28ec8591de59 ]
    
    For group-wide mempool backed events, like FS_ERROR, the free_event
    callback will need to reference the group's mempool to free the memory.
    Wire that argument into the current callers.
    
    Link: https://lore.kernel.org/r/20211025192746.66445-13-krisman@xxxxxxxxxxxxx
    Reviewed-by: Jan Kara <jack@xxxxxxx>
    Reviewed-by: Amir Goldstein <amir73il@xxxxxxxxx>
    Signed-off-by: Gabriel Krisman Bertazi <krisman@xxxxxxxxxxxxx>
    Signed-off-by: Jan Kara <jack@xxxxxxx>
    Signed-off-by: Chuck Lever <chuck.lever@xxxxxxxxxx>
    Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>

diff --git a/fs/notify/fanotify/fanotify.c b/fs/notify/fanotify/fanotify.c
index f82e20228999c..c620b4f6fe123 100644
--- a/fs/notify/fanotify/fanotify.c
+++ b/fs/notify/fanotify/fanotify.c
@@ -835,7 +835,8 @@ static void fanotify_free_name_event(struct fanotify_event *event)
 	kfree(FANOTIFY_NE(event));
 }
 
-static void fanotify_free_event(struct fsnotify_event *fsn_event)
+static void fanotify_free_event(struct fsnotify_group *group,
+				struct fsnotify_event *fsn_event)
 {
 	struct fanotify_event *event;
 
diff --git a/fs/notify/group.c b/fs/notify/group.c
index fb89c351295d6..6a297efc47887 100644
--- a/fs/notify/group.c
+++ b/fs/notify/group.c
@@ -88,7 +88,7 @@ void fsnotify_destroy_group(struct fsnotify_group *group)
 	 * that deliberately ignores overflow events.
 	 */
 	if (group->overflow_event)
-		group->ops->free_event(group->overflow_event);
+		group->ops->free_event(group, group->overflow_event);
 
 	fsnotify_put_group(group);
 }
diff --git a/fs/notify/inotify/inotify_fsnotify.c b/fs/notify/inotify/inotify_fsnotify.c
index be3eb1cebdcce..8279827836399 100644
--- a/fs/notify/inotify/inotify_fsnotify.c
+++ b/fs/notify/inotify/inotify_fsnotify.c
@@ -184,7 +184,8 @@ static void inotify_free_group_priv(struct fsnotify_group *group)
 		dec_inotify_instances(group->inotify_data.ucounts);
 }
 
-static void inotify_free_event(struct fsnotify_event *fsn_event)
+static void inotify_free_event(struct fsnotify_group *group,
+			       struct fsnotify_event *fsn_event)
 {
 	kfree(INOTIFY_E(fsn_event));
 }
diff --git a/fs/notify/notification.c b/fs/notify/notification.c
index 44bb10f507153..9022ae650cf86 100644
--- a/fs/notify/notification.c
+++ b/fs/notify/notification.c
@@ -64,7 +64,7 @@ void fsnotify_destroy_event(struct fsnotify_group *group,
 		WARN_ON(!list_empty(&event->list));
 		spin_unlock(&group->notification_lock);
 	}
-	group->ops->free_event(event);
+	group->ops->free_event(group, event);
 }
 
 /*
diff --git a/include/linux/fsnotify_backend.h b/include/linux/fsnotify_backend.h
index b71dc788018e4..3a7c314361824 100644
--- a/include/linux/fsnotify_backend.h
+++ b/include/linux/fsnotify_backend.h
@@ -156,7 +156,7 @@ struct fsnotify_ops {
 			    const struct qstr *file_name, u32 cookie);
 	void (*free_group_priv)(struct fsnotify_group *group);
 	void (*freeing_mark)(struct fsnotify_mark *mark, struct fsnotify_group *group);
-	void (*free_event)(struct fsnotify_event *event);
+	void (*free_event)(struct fsnotify_group *group, struct fsnotify_event *event);
 	/* called on final put+free to free memory */
 	void (*free_mark)(struct fsnotify_mark *mark);
 };




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