108 lines
2.4 KiB
C
108 lines
2.4 KiB
C
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// SPDX-License-Identifier: GPL-2.0
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/* Converted from tools/testing/selftests/bpf/verifier/and.c */
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#include <linux/bpf.h>
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#include <bpf/bpf_helpers.h>
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#include "bpf_misc.h"
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#define MAX_ENTRIES 11
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struct test_val {
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unsigned int index;
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int foo[MAX_ENTRIES];
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};
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struct {
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__uint(type, BPF_MAP_TYPE_HASH);
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__uint(max_entries, 1);
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__type(key, long long);
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__type(value, struct test_val);
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} map_hash_48b SEC(".maps");
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SEC("socket")
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__description("invalid and of negative number")
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__failure __msg("R0 max value is outside of the allowed memory range")
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__failure_unpriv
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__flag(BPF_F_ANY_ALIGNMENT)
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__naked void invalid_and_of_negative_number(void)
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{
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asm volatile (" \
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r1 = 0; \
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*(u64*)(r10 - 8) = r1; \
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r2 = r10; \
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r2 += -8; \
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r1 = %[map_hash_48b] ll; \
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call %[bpf_map_lookup_elem]; \
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if r0 == 0 goto l0_%=; \
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r1 = *(u8*)(r0 + 0); \
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r1 &= -4; \
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r1 <<= 2; \
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r0 += r1; \
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l0_%=: r1 = %[test_val_foo]; \
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*(u64*)(r0 + 0) = r1; \
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exit; \
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" :
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: __imm(bpf_map_lookup_elem),
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__imm_addr(map_hash_48b),
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__imm_const(test_val_foo, offsetof(struct test_val, foo))
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: __clobber_all);
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}
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SEC("socket")
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__description("invalid range check")
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__failure __msg("R0 max value is outside of the allowed memory range")
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__failure_unpriv
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__flag(BPF_F_ANY_ALIGNMENT)
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__naked void invalid_range_check(void)
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{
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asm volatile (" \
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r1 = 0; \
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*(u64*)(r10 - 8) = r1; \
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r2 = r10; \
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r2 += -8; \
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r1 = %[map_hash_48b] ll; \
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call %[bpf_map_lookup_elem]; \
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if r0 == 0 goto l0_%=; \
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r1 = *(u32*)(r0 + 0); \
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r9 = 1; \
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w1 %%= 2; \
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w1 += 1; \
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w9 &= w1; \
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w9 += 1; \
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w9 >>= 1; \
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w3 = 1; \
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w3 -= w9; \
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w3 *= 0x10000000; \
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r0 += r3; \
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*(u32*)(r0 + 0) = r3; \
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l0_%=: r0 = r0; \
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exit; \
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" :
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: __imm(bpf_map_lookup_elem),
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__imm_addr(map_hash_48b)
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: __clobber_all);
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}
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SEC("socket")
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__description("check known subreg with unknown reg")
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__success __failure_unpriv __msg_unpriv("R1 !read_ok")
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__retval(0)
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__naked void known_subreg_with_unknown_reg(void)
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{
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asm volatile (" \
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call %[bpf_get_prandom_u32]; \
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r0 <<= 32; \
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r0 += 1; \
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r0 &= 0xFFFF1234; \
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/* Upper bits are unknown but AND above masks out 1 zero'ing lower bits */\
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if w0 < 1 goto l0_%=; \
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r1 = *(u32*)(r1 + 512); \
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l0_%=: r0 = 0; \
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exit; \
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" :
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: __imm(bpf_get_prandom_u32)
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: __clobber_all);
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}
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char _license[] SEC("license") = "GPL";
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