bpf: Fix propagation of signed bounds from 64-bit min/max into 32-bit.

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Similar to unsigned bounds propagation fix signed bounds.
The 'Fixes' tag is a hint. There is no security bug here.
The verifier was too conservative.

Fixes: 3f50f132d8 ("bpf: Verifier, do explicit ALU32 bounds tracking")
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Acked-by: Yonghong Song <yhs@fb.com>
Link: https://lore.kernel.org/bpf/20211101222153.78759-2-alexei.starovoitov@gmail.com

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Alexei Starovoitov 2021-11-01 15:21:52 -07:00 • committed by Andrii Nakryiko

parent b9979db834

commit 388e2c0b97

1 changed files with 1 additions and 1 deletions

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kernel/bpf/verifier.c

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