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Description
See OpenMathLib/OpenBLAS#5250 for full context and reproducer
Calling ?GEEV with non-finite input will fail in ?HSEQR. ?GEEV will then invoke ?LASCAL to undo any previous scaling of the input data, using INFO as a reference - with the existing guard for INFO.GT.0 covering only half the invocations.
The trivial fix would be to move the existing check for INFO.GT.0 into the outer if (?CALEA) THEN conditional - or add a check for INFO.GE.0 there. The same problem appears to be present in ?GEEVX, though I have not checked in detail. Checklist
I've included a minimal example to reproduce the issue
I'd be willing to make a PR to solve this issue
The text was updated successfully, but these errors were encountered:
martin-frbg
changed the title
Calling ?GEEV with non-finite input leads to memory corruption from array underruns in ?LASCAL
Calling ?GEEV with non-finite input leads to memory corruption in ?LASCAL
May 17, 2025
Description
See OpenMathLib/OpenBLAS#5250 for full context and reproducer
Calling ?GEEV with non-finite input will fail in ?HSEQR. ?GEEV will then invoke ?LASCAL to undo any previous scaling of the input data, using INFO as a reference - with the existing guard for INFO.GT.0 covering only half the invocations.
The trivial fix would be to move the existing check for INFO.GT.0 into the outer
if (?CALEA) THEN
conditional - or add a check for INFO.GE.0 there. The same problem appears to be present in ?GEEVX, though I have not checked in detail.Checklist
The text was updated successfully, but these errors were encountered: