Re: [PATCH bpf v2 1/2] bpf: Fix same-register dst/src OOB read and pointer leak in sock_ops

[bot+bpf-ci]

> Fixes: 84f44df664e9 ("bpf: sock_ops sk access may stomp registers when dst_reg = src_reg")

This Fixes: tag covers the SOCK_OPS_GET_SK() portion of the fix,
since 84f44df664e9 introduced that macro. However, the identical
bug in SOCK_OPS_GET_FIELD() was introduced by an earlier commit:

  fd09af010788 ("bpf: sock_ops ctx access may stomp registers in corner case")

That commit added the dst_reg == src_reg handling to
SOCK_OPS_GET_FIELD() with the same missing zeroing in the
!fullsock path. Should this also carry:

  Fixes: fd09af010788 ("bpf: sock_ops ctx access may stomp registers in corner case")

Without it, kernels that have fd09af010788 but not 84f44df664e9
would not receive the SOCK_OPS_GET_FIELD() fix via stable backport.


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