add results

1 files changed, 39 insertions, 0 deletions

diff --git a/results/classifier/gemma3:27b/syscall/1346769 b/results/classifier/gemma3:27b/syscall/1346769
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index 00000000..9e0db973
--- /dev/null
+++ b/results/classifier/gemma3:27b/syscall/1346769
@@ -0,0 +1,39 @@
+
+
+
+/proc/self/maps content returned to 32-bits guest under 64-bits qemu
+
+Reading /proc/self/maps a user doesn't get a stack record. Not all programs relies on the maps file but some do.
+
+The bug found by running 32-bits binaries with address sanitizer (Asan) instrumentations under 64-bit qemu.
+
+$ echo "int main() { return 0; }" > /tmp/test.c
+$ gcc -m32 -fsanitize=address -fno-common -Wall -g -fPIC -o /tmp/test /tmp/test.c
+$ qemu-i386-static /tmp/test
+==4092==AddressSanitizer CHECK failed: /home/michail/Downloads/gcc-4.9.0/libsanitizer/sanitizer_common/sanitizer_linux_libcdep.cc:63 "(((uptr)&rl >= start && (uptr)&rl < end)) != (0)" (0x0, 0x0)
+    #0 0xf632ff01 (/home/michail/build/lib32/libasan.so.1+0x53f01)
+    #1 0xf6333f49 (/home/michail/build/lib32/libasan.so.1+0x57f49)
+    #2 0xf6338785 (/home/michail/build/lib32/libasan.so.1+0x5c785)
+    #3 0xf6338bd1 (/home/michail/build/lib32/libasan.so.1+0x5cbd1)
+    #4 0xf6331baf (/home/michail/build/lib32/libasan.so.1+0x55baf)
+    #5 0xf6331dca (/home/michail/build/lib32/libasan.so.1+0x55dca)
+    #6 0xf6331f5a (/home/michail/build/lib32/libasan.so.1+0x55f5a)
+    #7 0xf6330bd4 (/home/michail/build/lib32/libasan.so.1+0x54bd4)
+    #8 0xf67ebeec (/lib/ld-linux.so.2+0xeeec)
+    #9 0xf67de10e (/lib/ld-linux.so.2+0x110e)
+
+This happened because during initialization Asan can't find stack boundaries.
+
+For some reasons Qemu wants to report stack boundaries just for several arch targets skipping other ones. This is from linux-user/syscall.c open_self_maps()
+
+#if defined(TARGET_ARM) || defined(TARGET_M68K) || defined(TARGET_UNICORE32)
+    dprintf(fd, "%08llx-%08llx rw-p %08llx 00:00 0          [stack]\n",
+                (unsigned long long)ts->info->stack_limit,
+                (unsigned long long)(ts->info->start_stack +
+                                     (TARGET_PAGE_SIZE - 1)) & TARGET_PAGE_MASK,
+                (unsigned long long)0);
+#endif
+
+Not very clear why the case covers just specific targets.
+
+This bug continues the previously reported issue with not hiden system map http://lists.nongnu.org/archive/html/qemu-devel/2014-07/msg02793.html.
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