Comments (1)
elazarg
commented on July 17, 2024
Added a "simple_eq" that the current veirfier does not succeed on, for unknown reason:
0: (b7) r0 = 1
1: (61) r2 = *(u32 *)(r1 +76)
2: (61) r1 = *(u32 *)(r1 +80)
3: (1d) if r2 == r1 goto pc+3
R0=inv1 R1=pkt_end(id=0,off=0,imm=0) R2=pkt(id=0,off=0,r=0,imm=0) R10=fp0,call_-1
4: (b7) r1 = 15
5: (73) *(u8 *)(r2 +0) = r1
invalid access to packet, off=0 size=1, R2(id=0,off=0,r=0)
R2 offset is outside of the packet
The invariant R1=pkt_end(id=0,off=0,imm=0) is not precise.
from ebpf-verifier.
Related Issues (20)
- Support for BPF_FETCH in atomic operations HOT 3
- Inconsistency between PREVAIL verifier and uBPF
- Upgrade boost to 1.81
- Out of bounds memory load and stores verified by PREVAIL HOT 3
- Segmentation fault (core dumped) HOT 1
- Prevail incorrectly classifying map as non-map - Cannot subtract pointers to non-singleton regions HOT 1
- PREVAIL appears to verify use of invalid registers as correct for ALU operations
- BTF type data with cycles should be rejected HOT 3
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- Add support for signed DIV and MOD operations HOT 2
- Add support for BPF_MOVSX instruction
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