[qemu-x86-64-linux-user 1.6.1] qemu: uncaught target signal 11 (Segmentation fault) - core dumped

[skzzha]

Rjsupplicant is an authentication client of Campus Network in most universities in China. Its Linux version has only x86 and amd64 version.

On linux:

./qemu-x86_64 is compiled from latest qemu 1.6.1, with ./configure options: --enable-debug --target-list=x86_64-linux-user . Compiler is gcc version 4.7.3 (Debian 4.7.3-4)

$ sudo ./qemu-x86_64 ./rjsupplicant -n eth0 -u USER -p PASS -d 1 -s internet
qemu: uncaught target signal 11 (Segmentation fault) - core dumped

$ sudo gdb ./qemu-x86_64
(gdb) r ./rjsupplicant -n eth0 -u USER -p PASS -d 1 -s internet
(gdb) where
#0 0x00005555559c21bd in static_code_gen_buffer ()
#1 0x00005555555b74d5 in cpu_tb_exec (cpu=0x555557972580, tb_ptr=0x5555559c2190 <static_code_gen_buffer+819792> "A\213n\250\205\355\017\205\257")
    at /home/USER/x/rjsupplicant/x64/qemu-1.6.1/cpu-exec.c:56
#2 0x00005555555b817d in cpu_x86_exec (env=0x5555579726b0) at /home/USER/x/rjsupplicant/x64/qemu-1.6.1/cpu-exec.c:631
#3 0x00005555555d997a in cpu_loop (env=0x5555579726b0) at /home/USER/x/rjsupplicant/x64/qemu-1.6.1/linux-user/main.c:283
#4 0x00005555555eca6b in clone_func (arg=0x7fffffffc1d0) at /home/USER/x/rjsupplicant/x64/qemu-1.6.1/linux-user/syscall.c:4266
#5 0x00007ffff71bfe0e in start_thread (arg=0x7ffff7f04700) at pthread_create.c:311
#6 0x00007ffff6ef493d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:113

$ file rjsupplicant
rjsupplicant: ELF 64-bit LSB executable, x86-64, version 1 (SYSV), dynamically linked (uses shared libs), for GNU/Linux 2.6.9, not stripped

$ uname -r
3.10-2-amd64

And it can be run on Linux amd64 successfully.

Though I don't have the source code of rjsupplicant, so I don't have further information.

`qemu-x86_64 -strace ./rjsupplicant -n eth0 -u USER -p PASS -d 1 -s internet` is attached as strace_qemu.log

The binary is available to download at http://ge.tt/6pgG1tw/v/0

[skzzha (skzzha)]

and, `strace ./rjsuuplicant -n eth0 -u USER -p PASS -d 1 -s internet` is attached as strace_native.log

[Michael Tokarev (mjt+launchpad-tls)]

I'm not sure x86*-linux-user targets are being tested at all. Last time I checked, x86-64 variant crashed left and right to the point of being completely unusable...

[Peter Maydell (pmaydell)]

The backtrace indicates that this is a multithreaded application. These won't work reliably under qemu-user : they tend to crash, as you have found.

[Thomas Huth (th-huth)]

Triaging old bug tickets... can you still reproduce this issue with the latest version of QEMU? Or could we close this ticket nowadays?

[Launchpad Janitor (janitor)]

[Expired for qemu (Ubuntu) because there has been no activity for 60 days.]

[Launchpad Janitor (janitor)]

[Expired for QEMU because there has been no activity for 60 days.]