bpf: fix verifier error in dameon debug mode with newer LLVM versions #2181
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4.9.65 doesn't have narrow ctx access support in verifier, and clang generates such patterns occasionally when it thinks only up to specific size is accessed anyway. Fix the following error: [...] level=warning msg="72: (b7) r5 = 20" level=warning msg="73: (85) call 25" level=warning msg="74: (71) r1 = *(u8 *)(r10 -132)" level=warning msg="75: (71) r3 = *(u8 *)(r6 +44)" level=warning msg="invalid bpf_context access off=44 size=1" Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
tgraf
approved these changes
Nov 30, 2017
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4.9.65 doesn't have narrow ctx access support in verifier, and
clang generates such patterns occasionally when it thinks only
up to specific size is accessed anyway. Fix the following error:
[...]
level=warning msg="72: (b7) r5 = 20"
level=warning msg="73: (85) call 25"
level=warning msg="74: (71) r1 = *(u8 *)(r10 -132)"
level=warning msg="75: (71) r3 = *(u8 *)(r6 +44)"
level=warning msg="invalid bpf_context access off=44 size=1"
Signed-off-by: Daniel Borkmann daniel@iogearbox.net