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Change History

In the Linux kernel, the following vulnerability has been resolved:

xfs: remove xfs_attr_leaf_hasname

The calling convention of xfs_attr_leaf_hasname() is problematic, because
it returns a NULL buffer when xfs_attr3_leaf_read fails, a valid buffer
when xfs_attr3_leaf_lookup_int returns -ENOATTR or -EEXIST, and a
non-NULL buffer pointer for an already released buffer when
xfs_attr3_leaf_lookup_int fails with other error values.

Fix this by simply open coding xfs_attr_leaf_hasname in the callers, so
that the buffer release code is done by each caller of
xfs_attr3_leaf_read.

https://git.kernel.org/stable/c/2fbc8421d1db102c0e5458607e042a23a03648b1

https://git.kernel.org/stable/c/3a65ea768b8094e4699e72f9ab420eb9e0f3f568

https://git.kernel.org/stable/c/457121c01f609b9934addbb04d5c1ef638c71c61

https://git.kernel.org/stable/c/530082df991903f3330354e99e0cb7b05debfa86