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| author | Christian Krinitsin <mail@krinitsin.com> | 2025-05-30 15:56:20 +0200 |
|---|---|---|
| committer | Christian Krinitsin <mail@krinitsin.com> | 2025-05-30 15:56:20 +0200 |
| commit | 904141bfb8d5385b75eb3b7afec1dcda89af65a7 (patch) | |
| tree | c8b5e69b944c9f8b96dbb5afad6214d0406537b2 /classification/test_input/gitlab_semantic_bzhi | |
| parent | 712310482c3dbef91c3eb6458d1bff82a275fa52 (diff) | |
| download | emulator-bug-study-904141bfb8d5385b75eb3b7afec1dcda89af65a7.tar.gz emulator-bug-study-904141bfb8d5385b75eb3b7afec1dcda89af65a7.zip | |
add tests and include results
Diffstat (limited to 'classification/test_input/gitlab_semantic_bzhi')
| -rw-r--r-- | classification/test_input/gitlab_semantic_bzhi | 38 |
1 files changed, 38 insertions, 0 deletions
diff --git a/classification/test_input/gitlab_semantic_bzhi b/classification/test_input/gitlab_semantic_bzhi new file mode 100644 index 00000000..b86da08c --- /dev/null +++ b/classification/test_input/gitlab_semantic_bzhi @@ -0,0 +1,38 @@ +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. |