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Jann Horn
feafe8ccb1
[ Upstream commit4e3d1b2c48] FUSE_NOTIFY_RETRIEVE must be limited to uptodate folios; !uptodate folios can contain uninitialized data. Since FUSE_NOTIFY_RETRIEVE is intended to only return data that is already in the page cache and not wait for data from the FUSE daemon, treat !uptodate folios as if they weren't present. This only has security impact on systems that don't enable automatic zero-initialization of all page allocations via CONFIG_INIT_ON_ALLOC_DEFAULT_ON or init_on_alloc=1. Cc: stable@kernel.org Fixes:2d45ba381a("fuse: add retrieve request") Signed-off-by: Jann Horn <jannh@google.com> Link: https://patch.msgid.link/20260519-fuse-retrieve-uptodate-v1-1-a7a1912a37f9@google.com Acked-by: Miklos Szeredi <mszeredi@redhat.com> Signed-off-by: Christian Brauner (Amutable) <brauner@kernel.org> [adjusted for stable: page instead of folio] Signed-off-by: Jann Horn <jannh@google.com> Signed-off-by: Sasha Levin <sashal@kernel.org>