Commit 36e24c00 authored by Daniel Borkmann's avatar Daniel Borkmann Committed by David S. Miller

bpf: reset id on spilled regs in clear_all_pkt_pointers

Right now, we don't reset the id of spilled registers in case of
clear_all_pkt_pointers(). Given pkt_pointers are highly likely to
contain an id, do so by reusing __mark_reg_unknown_value().
Signed-off-by: default avatarDaniel Borkmann <daniel@iogearbox.net>
Acked-by: default avatarAlexei Starovoitov <ast@kernel.org>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 4a2ff55a
...@@ -1346,8 +1346,8 @@ static void clear_all_pkt_pointers(struct bpf_verifier_env *env) ...@@ -1346,8 +1346,8 @@ static void clear_all_pkt_pointers(struct bpf_verifier_env *env)
if (reg->type != PTR_TO_PACKET && if (reg->type != PTR_TO_PACKET &&
reg->type != PTR_TO_PACKET_END) reg->type != PTR_TO_PACKET_END)
continue; continue;
reg->type = UNKNOWN_VALUE; __mark_reg_unknown_value(state->spilled_regs,
reg->imm = 0; i / BPF_REG_SIZE);
} }
} }
......
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