🛡️ Sentinel: [HIGH] Fix potential buffer overflow in trelay string allocation#56
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manupawickramasinghe merged 4 commits intomainfrom Apr 16, 2026
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Replace unbounded `strcpy` with `strscpy` using the exact `name_len` calculated for memory allocation, preventing buffer overflows and possible TOCTOU issues. Signed-off-by: Jules <jules@example.com> Co-authored-by: manupawickramasinghe <73810867+manupawickramasinghe@users.noreply.github.com>
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Replace unbounded `strcpy` with `strscpy` using the exact `name_len` calculated for memory allocation, preventing buffer overflows and possible TOCTOU issues. Signed-off-by: google-labs-jules[bot] <161369871+google-labs-jules[bot]@users.noreply.github.com> Co-authored-by: manupawickramasinghe <73810867+manupawickramasinghe@users.noreply.github.com>
Replace unbounded strcpy with strscpy using the exact name_len calculated for memory allocation, preventing buffer overflows and possible TOCTOU issues. Signed-off-by: google-labs-jules[bot] <161369871+google-labs-jules[bot]@users.noreply.github.com> Co-authored-by: manupawickramasinghe <73810867+manupawickramasinghe@users.noreply.github.com>
Replace unbounded strcpy with strscpy using the exact name_len calculated for memory allocation, preventing buffer overflows and possible TOCTOU issues. Signed-off-by: google-labs-jules[bot] <161369871+google-labs-jules[bot]@users.noreply.github.com> Co-authored-by: manupawickramasinghe <73810867+manupawickramasinghe@users.noreply.github.com>
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🚨 Severity: HIGH
💡 Vulnerability: Unbounded
strcpyused to copy a user-provided stringnameto a dynamically allocated objecttrusing a flexible array member. If the buffer lengths differ between struct allocation evaluation and copy evaluation (e.g. TOCTOU), it could cause a buffer overflow, corrupting adjacent heap chunks.🎯 Impact: Kernel heap buffer overflow which could lead to privilege escalation or Denial of Service (DoS) in the
trelaypackage.🔧 Fix: Stored the string length evaluation to
name_lenand reused the result for both thekzallocmemory allocation logic (struct_size) and the secure copy mechanism (strscpy), guaranteeing perfectly bounded bounds.✅ Verification: Visually verified code correctly caches and respects
name_lenacross allocation and copy.PR created automatically by Jules for task 1740643445543777252 started by @manupawickramasinghe