Details
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Bug
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Status: Confirmed (View Workflow)
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Major
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Resolution: Unresolved
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10.4, 10.5, 10.6, 10.7, 10.8, 10.9, 10.10, 10.11, 11.0, 11.1, 11.2, 11.3, 11.4
Description
Even after MDEV-26272 was fixed, some problematic use of the macro my_offsetof() remains. This undefined behaviour is not flagged by GCC, but it should be flagged by clang when using cmake -DWITH_UBSAN=ON. I tried to find some examples in the log, but instead I found numerous examples of something else, such as the following:
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10.4 832e96deb6f368591dcb35a4fa33b2fd770aa17a |
/mariadb/10.4/sql/sql_select.cc:3863:22: runtime error: applying non-zero offset 4054449126480 to null pointer
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/mariadb/10.4/sql/sql_select.cc:3309:32: runtime error: applying non-zero offset 944 to null pointer
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Curiously, the following was not flagged when I ran ./mtr --suite=perfschema:
static inline void copy_events_statements(PFS_events_statements *dest, |
const PFS_events_statements *source) |
{
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/* Copy all attributes except DIGEST */ |
memcpy(dest, source, my_offsetof(PFS_events_statements, m_digest_storage)); |
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/* Copy DIGEST */ |
dest->m_digest_storage.copy(& source->m_digest_storage);
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}
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Attachments
Issue Links
- is blocked by
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- Closed
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- relates to
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MDEV-25454 Make MariaDB server UBSAN safe
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- Confirmed
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