Pengfei Xu <pengfei.xu@xxxxxxxxx> wrote:
> Bisected info between v6.7-rc7(keyctl05 passed) and v6.7-rc8(keyctl05 failed)
> is in attached.
>
> keyctl05 failed in add_key with type "dns_resolver" syscall step tracked
> by strace:
> "
> [pid 863107] add_key("dns_resolver", "desc", "\0\0\1\377\0", 5, KEY_SPEC_SESSION_KEYRING <unfinished ...>
> [pid 863106] <... alarm resumed>) = 30
> [pid 863107] <... add_key resumed>) = -1 EINVAL (Invalid argument)
> "
It should fail as the payload is actually invalid. The payload specifies a
version 1 format - and that requires a 6-byte header. The bug the patched
fixes is that whilst there is a length check for the basic 3-byte header,
there was no length check for the extended v1 header.
> After increased the dns_res_payload to 7 bytes(6 bytes was still failed),
The following doesn't work for you?
echo -n -e '\0\0\01\xff\0\0' | keyctl padd dns_resolver desc @p
David
