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| author | Christian Krinitsin <mail@krinitsin.com> | 2025-06-04 20:55:58 +0000 |
|---|---|---|
| committer | Christian Krinitsin <mail@krinitsin.com> | 2025-06-04 20:55:58 +0000 |
| commit | 45cde517004371146f7533c59c8005b8b2629291 (patch) | |
| tree | 94d550cdbb053c271101d9cc07e5dddc0a0c7edb /results/classifier/007/semantic/gitlab_semantic_bzhi | |
| parent | 0ffbcc8b5f9f084a14fa6e4b93095758b63c465d (diff) | |
| download | qemu-analysis-45cde517004371146f7533c59c8005b8b2629291.tar.gz qemu-analysis-45cde517004371146f7533c59c8005b8b2629291.zip | |
add new results
Diffstat (limited to 'results/classifier/007/semantic/gitlab_semantic_bzhi')
| -rw-r--r-- | results/classifier/007/semantic/gitlab_semantic_bzhi | 53 |
1 files changed, 53 insertions, 0 deletions
diff --git a/results/classifier/007/semantic/gitlab_semantic_bzhi b/results/classifier/007/semantic/gitlab_semantic_bzhi new file mode 100644 index 000000000..253ab4184 --- /dev/null +++ b/results/classifier/007/semantic/gitlab_semantic_bzhi @@ -0,0 +1,53 @@ +semantic: 0.920 +graphic: 0.652 +device: 0.589 +vnc: 0.287 +debug: 0.256 +boot: 0.220 +network: 0.203 +socket: 0.198 +performance: 0.165 +PID: 0.130 +permissions: 0.069 +other: 0.064 +KVM: 0.064 +files: 0.051 + +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. |