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authorChristian Krinitsin <mail@krinitsin.com>2025-07-03 07:27:52 +0000
committerChristian Krinitsin <mail@krinitsin.com>2025-07-03 07:27:52 +0000
commitd0c85e36e4de67af628d54e9ab577cc3fad7796a (patch)
treef8f784b0f04343b90516a338d6df81df3a85dfa2 /results/classifier/gemma3:12b/kvm/1376
parent7f4364274750eb8cb39a3e7493132fca1c01232e (diff)
downloademulator-bug-study-d0c85e36e4de67af628d54e9ab577cc3fad7796a.tar.gz
emulator-bug-study-d0c85e36e4de67af628d54e9ab577cc3fad7796a.zip
add deepseek and gemma results
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+
+x86 LSL and LAR fault
+Description of problem:
+From the description of LSL and LAR instructions in manual, `If the segment descriptor cannot be accessed or is an invalid type for the instruction, the ZF flag is cleared and no value is loaded in the destination operand.`. When it happens at the CPU, it seems they do nothing (nop). However, in QEMU, it crashes.
+Steps to reproduce:
+1. Compile this code
+```
+void main() {
+    asm("mov rax, 0xa02e698e741f5a6a");
+    asm("mov rbx, 0x20959ddd7a0aef");
+    asm("lsl ax, bx");
+}
+```
+2. Execute. QEMU crashes but CPU does not. This problem happens with LAR, too.
+Additional information:
+This bug is discovered by research conducted by KAIST SoftSec.