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| author | Christian Krinitsin <mail@krinitsin.com> | 2025-06-03 12:04:13 +0000 |
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| committer | Christian Krinitsin <mail@krinitsin.com> | 2025-06-03 12:04:13 +0000 |
| commit | 256709d2eb3fd80d768a99964be5caa61effa2a0 (patch) | |
| tree | 05b2352fba70923126836a64b6a0de43902e976a /results/classifier/105/instruction/1377 | |
| parent | 2ab14fa96a6c5484b5e4ba8337551bb8dcc79cc5 (diff) | |
| download | emulator-bug-study-256709d2eb3fd80d768a99964be5caa61effa2a0.tar.gz emulator-bug-study-256709d2eb3fd80d768a99964be5caa61effa2a0.zip | |
add new classifier result
Diffstat (limited to 'results/classifier/105/instruction/1377')
| -rw-r--r-- | results/classifier/105/instruction/1377 | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/results/classifier/105/instruction/1377 b/results/classifier/105/instruction/1377 new file mode 100644 index 00000000..f3d87d4f --- /dev/null +++ b/results/classifier/105/instruction/1377 @@ -0,0 +1,27 @@ +instruction: 0.973 +assembly: 0.847 +device: 0.773 +vnc: 0.768 +graphic: 0.742 +boot: 0.462 +socket: 0.412 +KVM: 0.326 +semantic: 0.321 +network: 0.279 +other: 0.095 +mistranslation: 0.073 + +x86 CVT* series instructions fault +Description of problem: +For example, CVTSD2SS instruction converts SRC[63:0] double precision floating point to DEST[31:0] single precision floating point. Although the CVTSD2SS instruction uses only 8 bytes, if it overlaps page boundary, I think QEMU tries to access over the valid memory and crashes. +Steps to reproduce: +1. Compile this code +``` +void main() { + mmap(0x555555559000, 0x1000, flag, ~~, 0); + asm("cvtsd2ss xmm1, qword ptr [0x555555559ff8]"); +} +``` +2. Execute. QEMU crashes but CPU does not. +Additional information: +This bug is discovered by research conducted by KAIST SoftSec. |