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Fixed bugs in memory-access syscall hooks. Error codes apart from -1 weren't handled (so a read syscall returning eg. -5 would mark `(uint64_t) -5` bytes as accessed. Futex also marked memory as accessed based on its `val` argument. This argument however either contains a thread-count or an address. The syscall writes at most 4 bytes to the `*uaddr` argument.
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libafl_qemu snapshot.rs bug-fixes
Description
Fixed bugs in memory-access syscall hooks. Error codes apart from -1 weren't handled (so a read syscall returning eg. -5 would mark
(uint64_t) -5bytes as accessed). Futex also marked memory as accessed based on itsvalargument. This argument however either contains a thread-count or an address. The syscall writes at most 4 bytes to the*uaddrargument.Checklist
./scripts/precommit.shand addressed all comments