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| author | Christian Krinitsin <mail@krinitsin.com> | 2025-06-01 21:35:14 +0200 |
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| committer | Christian Krinitsin <mail@krinitsin.com> | 2025-06-01 21:35:14 +0200 |
| commit | 3e4c5a6261770bced301b5e74233e7866166ea5b (patch) | |
| tree | 9379fddaba693ef8a045da06efee8529baa5f6f4 /results/classifier/03/semantic/gitlab_semantic_bzhi | |
| parent | e5634e2806195bee44407853c4bf8776f7abfa4f (diff) | |
| download | qemu-analysis-3e4c5a6261770bced301b5e74233e7866166ea5b.tar.gz qemu-analysis-3e4c5a6261770bced301b5e74233e7866166ea5b.zip | |
clean up repository
Diffstat (limited to 'results/classifier/03/semantic/gitlab_semantic_bzhi')
| -rw-r--r-- | results/classifier/03/semantic/gitlab_semantic_bzhi | 46 |
1 files changed, 46 insertions, 0 deletions
diff --git a/results/classifier/03/semantic/gitlab_semantic_bzhi b/results/classifier/03/semantic/gitlab_semantic_bzhi new file mode 100644 index 000000000..8cbf1d760 --- /dev/null +++ b/results/classifier/03/semantic/gitlab_semantic_bzhi @@ -0,0 +1,46 @@ +semantic: 0.920 +instruction: 0.623 +boot: 0.220 +network: 0.203 +mistranslation: 0.171 +other: 0.064 +KVM: 0.064 + +x86 BZHI semantic bug +Description of problem +The result of instruction BZHI is different from the CPU. The value of destination register and SF of EFLAGS are different. + +Steps to reproduce + +Compile this code + + +void main() { + asm("mov rax, 0xb1aa9da2fe33fe3"); + asm("mov rbx, 0x80000000ffffffff"); + asm("mov rcx, 0xf3fce8829b99a5c6"); + asm("bzhi rax, rbx, rcx"); +} + + + +Execute and compare the result with the CPU. + +CPU + +RAX = 0x0x80000000ffffffff +SF = 1 + + +QEMU + +RAX = 0xffffffff +SF = 0 + + + + + + +Additional information +This bug is discovered by research conducted by KAIST SoftSec. |