bpf: turn off sanitizer in do_misc_fixups for old clang #5499
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clang versions before version 18 manage to badly optimize the bpf verifier, with lots of variable spills leading to excessive stack usage in addition to likely rather slow code: kernel/bpf/verifier.c:23936:5: error: stack frame size (2096) exceeds limit (1280) in 'bpf_check' [-Werror,-Wframe-larger-than] kernel/bpf/verifier.c:21563:12: error: stack frame size (1984) exceeds limit (1280) in 'do_misc_fixups' [-Werror,-Wframe-larger-than] Turn off the sanitizer in the two functions that suffer the most from this when using one of the affected clang version. Signed-off-by: Arnd Bergmann <[email protected]>
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Pull request for series with
subject: bpf: turn off sanitizer in do_misc_fixups for old clang
version: 1
url: https://patchwork.kernel.org/project/netdevbpf/list/?series=974227