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| author | Kartik Agaram <vc@akkartik.com> | 2019-05-11 19:11:13 -0700 |
|---|---|---|
| committer | Kartik Agaram <vc@akkartik.com> | 2019-05-11 19:11:13 -0700 |
| commit | 6362c51d11ef27335875469e0ff06347357f46b1 (patch) | |
| tree | f7efb1941266b97f2a21166a83b1c5b9e5f734f1 /subx/020syscalls.cc | |
| parent | ff167ad77a615ef0506dce1e21c973533ca83088 (diff) | |
| download | mu-6362c51d11ef27335875469e0ff06347357f46b1.tar.gz | |
5155 - check for overflow in mmap segments
Diffstat (limited to 'subx/020syscalls.cc')
| -rw-r--r-- | subx/020syscalls.cc | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/subx/020syscalls.cc b/subx/020syscalls.cc index 6b9faa2c..444c9fd5 100644 --- a/subx/020syscalls.cc +++ b/subx/020syscalls.cc @@ -122,5 +122,10 @@ uint32_t new_segment(uint32_t length) { uint32_t result = Next_segment; Mem.push_back(vma(Next_segment, Next_segment+length)); Next_segment -= SPACE_FOR_SEGMENT; + if (Next_segment <= DATA_SEGMENT) { + raise << "Allocated too many segments; the VM ran out of memory. " + << "Maybe SPACE_FOR_SEGMENT can be smaller?\n" << end(); + exit(1); + } return result; } |