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Diffstat (limited to 'results/classifier/user-mode-bugs/1761153')
| -rw-r--r-- | results/classifier/user-mode-bugs/1761153 | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/results/classifier/user-mode-bugs/1761153 b/results/classifier/user-mode-bugs/1761153 new file mode 100644 index 000000000..4bc543a45 --- /dev/null +++ b/results/classifier/user-mode-bugs/1761153 @@ -0,0 +1,25 @@ + + +qemu-user incorrect mmap for large files on 64bits host and 32bits executable. + +qemu-user seems to incorrectly mmap a file if the offset is > 4GiB and guest binary is 32 bits elf. + +See attached test program `test_mmap.c`. + +``` +$ gcc -g -m32 -march=i386 test_mmap.c -o test_mmap +$ file test_mmap +test_mmap: ELF 32-bit LSB executable, Intel 80386, version 1 (SYSV), dynamically linked, interpreter /lib/ld-linux.so.2, for GNU/Linux 3.2.0, BuildID[sha1]=e36db05f4dfd8a9cfde8a969214a242c1f5a4b49, with debug_info, not stripped +$ uname -a +Linux localhost.localdomain 4.15.10-300.fc27.x86_64 #1 SMP Thu Mar 15 17:13:04 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux +$ qemu-i386 --version +qemu-i386 version 2.10.1(qemu-2.10.1-2.fc27) +Copyright (c) 2003-2017 Fabrice Bellard and the QEMU Project developers +$ ./test_mmap +$ qemu-i386 test_mmap +Incorrect data 1 +``` + +Tested with qemu-i386 packaged in Fedora 27 and qemu-i386 compiled from git master (094b62cd9c) + +The issue was firstly detected on (more complex program) using qemu-arm (with 32bits binary) so it is probably a 32/64bits problem independently of the cpu family. \ No newline at end of file |