[tor-bugs] #19931 [Core Tor/Tor]: curve25519-donna runtime math errors on armhf

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#19931: curve25519-donna runtime math errors on armhf
-------------------------------------------------+-------------------------
 Reporter:  chadmiller                           |          Owner:
     Type:  defect                               |         Status:  new
 Priority:  Medium                               |      Milestone:  Tor:
                                                 |  0.2.???
Component:  Core Tor/Tor                         |        Version:  Tor:
                                                 |  0.2.8.6
 Severity:  Normal                               |     Resolution:
 Keywords:  regression, integer-overflow,        |  Actual Points:
  029-proposed                                   |
Parent ID:                                       |         Points:  0.5
 Reviewer:                                       |        Sponsor:
-------------------------------------------------+-------------------------

Comment (by chadmiller):

 Here's the package build-log. It's kind of noisy. Sorry.

 https://launchpadlibrarian.net/276525002
 /buildlog_snap_ubuntu_xenial_armhf_tor-middle-relay_BUILDING.txt.gz

 Yes, Tor 0.2.8.6.

 g++-5, gcc-5  armhf 5.4.0-6ubuntu1~16.04.1

 ./configure --prefix= --disable-asciidoc --enable-expensive-hardening
 --enable-gcc-warnings

 checking whether the compiler accepts -fstack-protector-all... yes
 checking whether the compiler accepts -Wstack-protector... yes
 checking whether the compiler accepts -fwrapv... yes
 checking whether the compiler accepts --param ssp-buffer-size=1... yes
 checking whether the compiler accepts -fPIE... yes
 checking whether the linker accepts -pie... yes
 checking whether the compiler accepts -fsanitize=address... yes
 checking whether the compiler accepts -fsanitize=undefined... yes
 checking whether the compiler accepts -fno-omit-frame-pointer... yes
 checking whether the linker accepts -z relro -z now... yes
 checking whether the linker accepts -rdynamic... yes
 checking whether the compiler accepts -fomit-frame-pointer... yes
 checking whether the compiler accepts -fasynchronous-unwind-tables... yes
 ...
 checking whether we can use curve25519-donna-c64... no
 checking crypto_scalarmult_curve25519.h usability... no
 checking crypto_scalarmult_curve25519.h presence... no
 checking for crypto_scalarmult_curve25519.h... no
 checking nacl/crypto_scalarmult_curve25519.h usability... no
 checking nacl/crypto_scalarmult_curve25519.h presence... no
 checking for nacl/crypto_scalarmult_curve25519.h... no
 checking for nacl compiled with a fast curve25519 implementation... no
 ...

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/19931#comment:2>
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