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Yihan Ding 8e50981d7d bpf: allow UTF-8 literals in bpf_bprintf_prepare()

[ Upstream commit b960430ea8 ]

bpf_bprintf_prepare() only needs ASCII parsing for conversion
specifiers. Plain text can safely carry bytes >= 0x80, so allow
UTF-8 literals outside '%' sequences while keeping ASCII control
bytes rejected and format specifiers ASCII-only.

This keeps existing parsing rules for format directives unchanged,
while allowing helpers such as bpf_trace_printk() to emit UTF-8
literal text.

Update test_snprintf_negative() in the same commit so selftests keep
matching the new plain-text vs format-specifier split during bisection.

Fixes: 48cac3f4a9 ("bpf: Implement formatted output helpers with bstr_printf")
Signed-off-by: Yihan Ding <dingyihan@uniontech.com>
Acked-by: Paul Chaignon <paul.chaignon@gmail.com>
Link: https://lore.kernel.org/r/20260416120142.1420646-2-dingyihan@uniontech.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

2026-06-01 17:39:18 +02:00

crypto/chacha20-s390

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cxl

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fault-injection

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ktest

ktest: Run POST_KTEST hooks on failure and cancellation

2026-06-01 17:39:14 +02:00

kunit

kunit: tool: copy caller args in run_kernel to prevent mutation