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Add bounds check to BPF assembler jump fixup. #8176

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merged 1 commit into from Nov 1, 2023

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@fasaxc fasaxc commented Nov 1, 2023

Description

If the program is too big, the jump offset could wrap when converted to int16, fail cleanly in that case instead of offering a malformed program to the kernel.

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Release Note

Fix incorrect conversion to 16-bit offset in the BPF assembler.  Fail if the value would wrap.

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@fasaxc fasaxc requested a review from a team as a code owner November 1, 2023 14:40
@marvin-tigera marvin-tigera added this to the Calico v3.27.0 milestone Nov 1, 2023
@marvin-tigera marvin-tigera added release-note-required Change has user-facing impact (no matter how small) docs-pr-required Change is not yet documented labels Nov 1, 2023
@fasaxc fasaxc added docs-not-required Docs not required for this change cherry-pick-candidate and removed docs-pr-required Change is not yet documented labels Nov 1, 2023
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@Behnam-Shobiri Behnam-Shobiri left a comment

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lgtm

@fasaxc fasaxc merged commit 39a5987 into projectcalico:master Nov 1, 2023
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3 participants