fix out of bounds read in xlarrv
Signed-off-by: qinyu <chinyu0704@outlook.com>
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0002-Fix-out-of-bounds-read-in-slarrv.patch
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0002-Fix-out-of-bounds-read-in-slarrv.patch
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From 0631b6beaed60ba118b0b027c0f8d35397bf5df0 Mon Sep 17 00:00:00 2001
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From: Keno Fischer <keno@juliacomputing.com>
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Date: Thu, 30 Sep 2021 03:51:23 -0400
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Subject: [PATCH] Fix out of bounds read in slarrv
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This was originally reported as https://github.com/JuliaLang/julia/issues/42415.
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I've tracked this down to an our of bounds read on the following line:
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https://github.com/Reference-LAPACK/lapack/blob/44ecb6a5ff821b1cbb39f8cc2166cb098e060b4d/SRC/slarrv.f#L423
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In the crashing example, `M` is `0`, causing `slarrv` to read uninitialized
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memory from the work array. I believe the `0` for `M` is correct and indeed,
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the documentation above supports that `M` may be zero:
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https://github.com/Reference-LAPACK/lapack/blob/44ecb6a5ff821b1cbb39f8cc2166cb098e060b4d/SRC/slarrv.f#L113-L116
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I believe it may be sufficient to early-out this function as suggested
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in this PR. However, I have limited context for the full routine here,
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so I would appreciate a sanity check.
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---
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SRC/clarrv.f | 2 +-
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SRC/dlarrv.f | 2 +-
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SRC/slarrv.f | 2 +-
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SRC/zlarrv.f | 2 +-
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4 files changed, 4 insertions(+), 4 deletions(-)
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diff --git a/SRC/clarrv.f b/SRC/clarrv.f
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index 1f09e4d..42f7107 100644
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--- a/SRC/clarrv.f
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+++ b/SRC/clarrv.f
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@@ -348,7 +348,7 @@
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*
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* Quick return if possible
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*
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- IF( N.LE.0 ) THEN
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+ IF( (N.LE.0).OR.(M.LE.0) ) THEN
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RETURN
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END IF
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*
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diff --git a/SRC/dlarrv.f b/SRC/dlarrv.f
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index b036c1e..2994303 100644
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--- a/SRC/dlarrv.f
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+++ b/SRC/dlarrv.f
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@@ -350,7 +350,7 @@
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*
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* Quick return if possible
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*
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- IF( N.LE.0 ) THEN
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+ IF( (N.LE.0).OR.(M.LE.0) ) THEN
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RETURN
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END IF
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*
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diff --git a/SRC/slarrv.f b/SRC/slarrv.f
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index 9d72b33..95f94fd 100644
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--- a/SRC/slarrv.f
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+++ b/SRC/slarrv.f
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@@ -350,7 +350,7 @@
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*
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* Quick return if possible
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*
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- IF( N.LE.0 ) THEN
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+ IF( (N.LE.0).OR.(M.LE.0) ) THEN
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RETURN
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END IF
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*
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diff --git a/SRC/zlarrv.f b/SRC/zlarrv.f
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index 51ec558..e4be63e 100644
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--- a/SRC/zlarrv.f
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+++ b/SRC/zlarrv.f
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@@ -348,7 +348,7 @@
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*
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* Quick return if possible
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*
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- IF( N.LE.0 ) THEN
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+ IF( (N.LE.0).OR.(M.LE.0) ) THEN
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RETURN
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END IF
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*
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--
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1.8.3.1
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@ -5,7 +5,7 @@
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Name: lapack
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Version: %{mediumver}.0
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Release: 2
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Release: 3
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Summary: The LAPACK libraries for numerical linear algebra.
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License: BSD
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URL: http://www.netlib.org/lapack/
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@ -13,6 +13,7 @@ Source0: https://github.com/Reference-LAPACK/lapack/archive/v%{version}.tar.gz
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Source1: http://www.netlib.org/lapack/manpages.tgz
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Patch1: 0001-fix-lapack-devel-build-error.patch
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Patch2: 0002-Fix-out-of-bounds-read-in-slarrv.patch
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BuildRequires: gcc-gfortran
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Provides: blas = %{version}-%{release}
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@ -207,6 +208,9 @@ sed -i 's|@LAPACK_VERSION@|%{version}|g' %{buildroot}%{_libdir}/pkgconfig/lapack
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%endif
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%changelog
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* Wed Dec 15 2021 qinyu <chinyu0704@outlook.com> - 3.10.0-3
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- fix lapack-devel build error
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* Mon Dec 6 2021 zhouwenpei <zhouwenpei1huawei.com> - 3.10.0-2
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- fix lapack-devel build error
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