binder: Reject transactions containig FDs when they're not allowed. #318
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LGTM except the commit title :P
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Signed-off-by: Wedson Almeida Filho <[email protected]>
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Fixed, thanks for spotting this! :) |
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Apr 16, 2024
In case when is64 == 1 in emit(A64_REV32(is64, dst, dst), ctx) the generated insn reverses byte order for both high and low 32-bit words, resuling in an incorrect swap as indicated by the jit test: [ 9757.262607] test_bpf: Rust-for-Linux#312 BSWAP 16: 0x0123456789abcdef -> 0xefcd jited:1 8 PASS [ 9757.264435] test_bpf: Rust-for-Linux#313 BSWAP 32: 0x0123456789abcdef -> 0xefcdab89 jited:1 ret 1460850314 != -271733879 (0x5712ce8a != 0xefcdab89)FAIL (1 times) [ 9757.266260] test_bpf: Rust-for-Linux#314 BSWAP 64: 0x0123456789abcdef -> 0x67452301 jited:1 8 PASS [ 9757.268000] test_bpf: Rust-for-Linux#315 BSWAP 64: 0x0123456789abcdef >> 32 -> 0xefcdab89 jited:1 8 PASS [ 9757.269686] test_bpf: Rust-for-Linux#316 BSWAP 16: 0xfedcba9876543210 -> 0x1032 jited:1 8 PASS [ 9757.271380] test_bpf: Rust-for-Linux#317 BSWAP 32: 0xfedcba9876543210 -> 0x10325476 jited:1 ret -1460850316 != 271733878 (0xa8ed3174 != 0x10325476)FAIL (1 times) [ 9757.273022] test_bpf: Rust-for-Linux#318 BSWAP 64: 0xfedcba9876543210 -> 0x98badcfe jited:1 7 PASS [ 9757.274721] test_bpf: Rust-for-Linux#319 BSWAP 64: 0xfedcba9876543210 >> 32 -> 0x10325476 jited:1 9 PASS Fix this by forcing 32bit variant of rev32. Fixes: 1104247 ("bpf, arm64: Support unconditional bswap") Signed-off-by: Artem Savkov <[email protected]> Tested-by: Puranjay Mohan <[email protected]> Acked-by: Puranjay Mohan <[email protected]> Acked-by: Xu Kuohai <[email protected]> Message-ID: <[email protected]> Signed-off-by: Alexei Starovoitov <[email protected]>
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Signed-off-by: Wedson Almeida Filho [email protected]