Advisory: Possible double free in SmallVec::insert_many #30
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For details, see: * servo/rust-smallvec#96 - original bug report * servo/rust-smallvec#103 - fix
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If an iterator passed to
SmallVec::insert_manypanicked inIterator::next, destructors were run during unwinding while the vector was in an inconsistent state, possibly causing a double free (a destructor running on two copies of the same value).This is fixed in smallvec 0.6.3 by ensuring that the vector's length is not updated to include moved items until they have been removed from their original positions. Items still may be leaked if
Iterator::nextpanics, but they will not be dropped more than once.For more details, see:
SmallVec::insert_manyis unsound servo/rust-smallvec#96 - original bug report