ab839a5819
Test verifier/uninit.c automatically converted to use inline assembly. Signed-off-by: Eduard Zingerman <eddyz87@gmail.com> Link: https://lore.kernel.org/r/20230325025524.144043-37-eddyz87@gmail.com Signed-off-by: Alexei Starovoitov <ast@kernel.org>
61 lines
1.3 KiB
C
61 lines
1.3 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/* Converted from tools/testing/selftests/bpf/verifier/uninit.c */
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#include <linux/bpf.h>
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#include <bpf/bpf_helpers.h>
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#include "../../../include/linux/filter.h"
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#include "bpf_misc.h"
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SEC("socket")
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__description("read uninitialized register")
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__failure __msg("R2 !read_ok")
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__failure_unpriv
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__naked void read_uninitialized_register(void)
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{
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asm volatile (" \
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r0 = r2; \
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exit; \
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" ::: __clobber_all);
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}
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SEC("socket")
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__description("read invalid register")
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__failure __msg("R15 is invalid")
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__failure_unpriv
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__naked void read_invalid_register(void)
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{
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asm volatile (" \
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.8byte %[mov64_reg]; \
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exit; \
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" :
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: __imm_insn(mov64_reg, BPF_MOV64_REG(BPF_REG_0, -1))
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: __clobber_all);
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}
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SEC("socket")
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__description("program doesn't init R0 before exit")
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__failure __msg("R0 !read_ok")
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__failure_unpriv
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__naked void t_init_r0_before_exit(void)
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{
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asm volatile (" \
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r2 = r1; \
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exit; \
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" ::: __clobber_all);
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}
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SEC("socket")
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__description("program doesn't init R0 before exit in all branches")
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__failure __msg("R0 !read_ok")
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__msg_unpriv("R1 pointer comparison")
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__naked void before_exit_in_all_branches(void)
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{
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asm volatile (" \
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if r1 >= 0 goto l0_%=; \
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r0 = 1; \
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r0 += 2; \
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l0_%=: exit; \
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" ::: __clobber_all);
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}
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char _license[] SEC("license") = "GPL";
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