https://bugzilla.mindrot.org/show_bug.cgi?id=1885
Summary: umac.c contains strict aliasing violations
Product: Portable OpenSSH
Version: 5.8p1
Platform: All
OS/Version: All
Status: NEW
Severity: normal
Priority: P2
Component: sshd
AssignedTo: [email protected]
ReportedBy: [email protected]
In the function uhash_init, ahc->poly_key_8 points to a UINT64. This is
passed to endian_convert as a void*. It is then cast to a UINT32* and
the buffer is modified. This is a strict aliasing violation. It can
(and did in our case) cause code to be mis-compiled when
-fstrict-aliasing is used (which is true for -O2 in gcc). This
introduced a runtime error in sshd. Refer to:
http://code.google.com/p/chromium-os/issues/detail?id=13479
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