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Eric Biggers
7c68ed5c5a
bpf_get_fsverity_digest() silently truncates the digest if the provided
buffer is too small. This is a footgun, and it doesn't match the
semantics of the equivalent UAPI (FS_IOC_MEASURE_VERITY).
Change it to return -EOVERFLOW instead, matching FS_IOC_MEASURE_VERITY.
Fixes: 67814c00de ("bpf, fsverity: Add kfunc bpf_get_fsverity_digest")
Signed-off-by: Eric Biggers <[email protected]>
Acked-by: Song Liu <[email protected]>
Cc: [email protected]
Link: https://lore.kernel.org/bpf/[email protected]
Signed-off-by: Kumar Kartikeya Dwivedi <[email protected]>