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Don't access uninitialized indices in tril!/triu! for numeric arrays #52528

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merged 9 commits into from
Jan 25, 2024
Merged

Don't access uninitialized indices in tril!/triu! for numeric arrays #52528

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57fd764
Don't access uninitialized indices in tril/triu for numreic arrays
jishnub Dec 14, 2023
1d8e5ab
Assign zero individually
jishnub Dec 14, 2023
437732c
Merge branch 'master' into jishnub/triul
jishnub Jan 4, 2024
cce018f
Merge branch 'master' into jishnub/triul
jishnub Jan 15, 2024
d2d0e5e
Zero for concrete numeric eltypes
jishnub Jan 15, 2024
dbe324e
propagate inbounds
jishnub Jan 15, 2024
7a4c982
Fix whitespace
jishnub Jan 15, 2024
f028321
Add haszero trait
jishnub Jan 15, 2024
debc7ee
Merge branch 'master' into jishnub/triul
jishnub Jan 24, 2024
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Assign zero individually
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@jishnub
jishnub committed Dec 14, 2023
commit 1d8e5abd5c519d3bc474b1bdd90640c9e83315d2
6 changes: 2 additions & 4 deletions stdlib/LinearAlgebra/src/dense.jl
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Original file line number Diff line number Diff line change
Expand Up @@ -137,10 +137,9 @@ function triu!(M::AbstractMatrix, k::Integer)
end
function _triu!(M::AbstractMatrix{<:Number}, k::Integer)
m, n = size(M)
z = zero(eltype(M))
for j in 1:min(n, m + k)
for i in max(1, j - k + 1):m
@inbounds M[i,j] = z
@inbounds M[i,j] = zero(eltype(M))
end
end
return M
Expand Down Expand Up @@ -188,10 +187,9 @@ function tril!(M::AbstractMatrix, k::Integer)
end
function _tril!(M::AbstractMatrix{<:Number}, k)
m, n = size(M)
z = zero(eltype(M))
for j in max(1, k + 1):n
for i in 1:min(j - k - 1, m)
@inbounds M[i,j] = z
@inbounds M[i,j] = zero(eltype(M))
end
end
return M
Expand Down