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afs: Fix the volume AFS_VOLUME_RM_TREE is set on

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[ Upstream commit 56b4e4b26f ]

Fix afs_insert_volume_into_cell() to set AFS_VOLUME_RM_TREE on the volume
replaced, not the new volume, as it's now removed from the cell's volume
tree.  This will cause the old volume to be removed from the tree twice and
the new volume never to be removed.

Fixes: 9a6b294ab4 ("afs: Fix use-after-free due to get/remove race in volume tree")
Closes: https://sashiko.dev/#/patchset/20260618074903.2374756-1-dhowells%40redhat.com
Signed-off-by: David Howells <dhowells@redhat.com>
Link: https://patch.msgid.link/20260622090856.2746629-21-dhowells@redhat.com
cc: Marc Dionne <marc.dionne@auristor.com>
cc: linux-afs@lists.infradead.org
Signed-off-by: Christian Brauner (Amutable) <brauner@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
David Howells
2026-07-24 16:03:26 +02:00
committed by Greg Kroah-Hartman
parent bef5514f6b
commit 1607075220
1 changed files with 1 additions and 1 deletions
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fs/afs/volume.c
+1 -1
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@@ -37,7 +37,7 @@ static struct afs_volume *afs_insert_volume_into_cell(struct afs_cell *cell,
goto found;
}
set_bit(AFS_VOLUME_RM_TREE, &volume->flags);
set_bit(AFS_VOLUME_RM_TREE, &p->flags);
rb_replace_node_rcu(&p->cell_node, &volume->cell_node, &cell->volumes);
}
}