On 6/14/22 9:21 PM, Kumar Kartikeya Dwivedi wrote:
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On processing a module BTF of module built for an older kernel, we might
sometimes find that some type points to itself forming a loop. If such a
type is a modifier, btf_check_type_tags's while loop following modifier
chain will be caught in an infinite loop.
Fix this by defining a maximum chain length and bailing out if we spin
any longer than that.
Fixes: eb596b090558 ("bpf: Ensure type tags precede modifiers in BTF")
Signed-off-by: Kumar Kartikeya Dwivedi <memxor@xxxxxxxxx>
Acked-by: Yonghong Song <yhs@xxxxxx>
