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Python: Fix another bad "value transfer" join #9859

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merged 1 commit into from
Aug 17, 2022
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Python: Fix another bad "value transfer" join #9859

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11 changes: 10 additions & 1 deletion python/ql/lib/semmle/python/pointsto/PointsTo.qll
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Original file line number Diff line number Diff line change
Expand Up @@ -1271,12 +1271,21 @@ module InterProceduralPointsTo {
)
)
or
non_escaping_global_transfer(pred_var, pred_context, succ_def, succ_context)
}

pragma[nomagic]
private predicate non_escaping_global_transfer(
EssaVariable pred_var, PointsToContext pred_context, ScopeEntryDefinition succ_def,
PointsToContext succ_context
) {
exists(NonEscapingGlobalVariable var |
var = pred_var.getSourceVariable() and
var = succ_def.getSourceVariable() and
pred_var.getAUse() = succ_context.getRootCall() and
pred_context.isImport() and
succ_context.appliesToScope(succ_def.getScope())
pragma[only_bind_into](succ_context)
.appliesToScope(pragma[only_bind_into](succ_def).getScope())
)
}

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