From: David Howells dhowells@redhat.com
[ Upstream commit c73aa4102f5b9f261a907c3b3df94cd2c478504d ]
Fix the ->get handlers for the afs.cell and afs.volume xattrs to pass the source data size to memcpy() rather than target buffer size.
Overcopying the source data occasionally causes the kernel to oops.
Fixes: d3e3b7eac886 ("afs: Add metadata xattrs") Signed-off-by: David Howells dhowells@redhat.com Signed-off-by: Sasha Levin sashal@kernel.org Signed-off-by: Yang Yingliang yangyingliang@huawei.com --- fs/afs/xattr.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/fs/afs/xattr.c b/fs/afs/xattr.c index cfcc674..411f67c 100644 --- a/fs/afs/xattr.c +++ b/fs/afs/xattr.c @@ -50,7 +50,7 @@ static int afs_xattr_get_cell(const struct xattr_handler *handler, return namelen; if (namelen > size) return -ERANGE; - memcpy(buffer, cell->name, size); + memcpy(buffer, cell->name, namelen); return namelen; }
@@ -104,7 +104,7 @@ static int afs_xattr_get_volume(const struct xattr_handler *handler, return namelen; if (namelen > size) return -ERANGE; - memcpy(buffer, volname, size); + memcpy(buffer, volname, namelen); return namelen; }