lock user-mode and semantic-bugs

1 files changed, 28 insertions, 0 deletions

diff --git a/results/classifier/user-mode-bugs/1661815 b/results/classifier/user-mode-bugs/1661815
new file mode 100644
index 000000000..34f694efb
--- /dev/null
+++ b/results/classifier/user-mode-bugs/1661815
@@ -0,0 +1,28 @@
+
+
+Stack address is returned from function translate_one
+
+The vulnerable version is qemu-2.8.0, and the vulnerable function is in "target-s390x/translate.c".
+
+The code snippet is as following.
+
+static ExitStatus translate_one(CPUS390XState *env, DisasContext *s)
+{
+    const DisasInsn *insn;
+    ExitStatus ret = NO_EXIT;
+    DisasFields f;
+    ...
+    s->fields = &f;
+    ...
+    s->pc = s->next_pc;
+    return ret;
+}
+
+A stack address, i.e. the address of local variable "f" is returned from current function through the output parameter "s->fields" as a side effect.
+
+This issue is one kind of undefined behaviors, according the C Standard, 6.2.4 [ISO/IEC 9899:2011] (https://www.securecoding.cert.org/confluence/display/c/DCL30-C.+Declare+objects+with+appropriate+storage+durations)
+
+This dangerous defect may lead to an exploitable vulnerability.
+We suggest sanitizing "s->fields" as null before return.
+
+Note that this issue is reported by shqking and Zhenwei Zou together.
\ No newline at end of file