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| author | Christian Krinitsin <mail@krinitsin.com> | 2025-07-03 19:39:53 +0200 |
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| committer | Christian Krinitsin <mail@krinitsin.com> | 2025-07-03 19:39:53 +0200 |
| commit | dee4dcba78baf712cab403d47d9db319ab7f95d6 (patch) | |
| tree | 418478faf06786701a56268672f73d6b0b4eb239 /results/classifier/semantic-bugs/1372 | |
| parent | 4d9e26c0333abd39bdbd039dcdb30ed429c475ba (diff) | |
| download | qemu-analysis-dee4dcba78baf712cab403d47d9db319ab7f95d6.tar.gz qemu-analysis-dee4dcba78baf712cab403d47d9db319ab7f95d6.zip | |
restructure results
Diffstat (limited to 'results/classifier/semantic-bugs/1372')
| -rw-r--r-- | results/classifier/semantic-bugs/1372 | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/results/classifier/semantic-bugs/1372 b/results/classifier/semantic-bugs/1372 new file mode 100644 index 000000000..a5a86bb81 --- /dev/null +++ b/results/classifier/semantic-bugs/1372 @@ -0,0 +1,33 @@ +semantic: 0.995 +instruction: 0.963 +graphic: 0.860 +device: 0.736 +assembly: 0.728 +mistranslation: 0.574 +vnc: 0.420 +boot: 0.411 +socket: 0.263 +network: 0.171 +other: 0.159 +KVM: 0.083 + +x86 BEXTR semantic bug +Description of problem: +The result of instruction BEXTR is different with from the CPU. The value of destination register is different. I think QEMU does not consider the operand size limit. +Steps to reproduce: +1. Compile this code +``` +void main() { + asm("mov rax, 0x17b3693f77fb6e9"); + asm("mov rbx, 0x8f635a775ad3b9b4"); + asm("mov rcx, 0xb717b75da9983018"); + asm("bextr eax, ebx, ecx"); +} +``` +2. Execute and compare the result with the CPU. + - CPU + - RAX = 0x5a + - QEMU + - RAX = 0x635a775a +Additional information: +This bug is discovered by research conducted by KAIST SoftSec. |