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[Bug binutils/28892] New: x86 OP_VEX use of uninitialised value


From: amodra at gmail dot com
Subject: [Bug binutils/28892] New: x86 OP_VEX use of uninitialised value
Date: Tue, 15 Feb 2022 08:15:35 +0000

https://sourceware.org/bugzilla/show_bug.cgi?id=28892

            Bug ID: 28892
           Summary: x86 OP_VEX use of uninitialised value
           Product: binutils
           Version: 2.39 (HEAD)
            Status: NEW
          Severity: normal
          Priority: P2
         Component: binutils
          Assignee: unassigned at sourceware dot org
          Reporter: amodra at gmail dot com
  Target Milestone: ---

Taken from a fuzzed object file.

cat > xxx.s <<EOF
 .text
 .byte 0xc4,0xc2,0x20,0x90,0x04,0
EOF
gas/as-new -o xxx.o xxx.s
valgrind binutils/objdump -d -m i8086 xxx.o

results in "Conditional jump or move depends on uninitialised value(s)"

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