Re: [PATCH bpf v2 1/2] btf: fix resolving BTF_KIND_VAR after ARRAY, STRUCT, UNION, PTR

From: Daniel Borkmann
Date: Mon Mar 06 2023 - 17:20:13 EST


On 3/6/23 12:21 PM, Lorenz Bauer wrote:
btf_datasec_resolve contains a bug that causes the following BTF
to fail loading:

[1] DATASEC a size=2 vlen=2
type_id=4 offset=0 size=1
type_id=7 offset=1 size=1
[2] INT (anon) size=1 bits_offset=0 nr_bits=8 encoding=(none)
[3] PTR (anon) type_id=2
[4] VAR a type_id=3 linkage=0
[5] INT (anon) size=1 bits_offset=0 nr_bits=8 encoding=(none)
[6] TYPEDEF td type_id=5
[7] VAR b type_id=6 linkage=0

[...]
The fix is to reset resolve_mode to RESOLVE_TBD before attempting to
resolve a VAR from a DATASEC.

Fixes: 1dc92851849c ("bpf: kernel side support for BTF Var and DataSec")
Signed-off-by: Lorenz Bauer <lmb@xxxxxxxxxxxxx>

Looks like patchbot is on strike, the series got applied to bpf, thanks!