.
Thread 3 (process 8857):
#0  0xf771f430 in __kernel_vsyscall ()
No symbol table info available.
#1  0x4897284c in ?? ()
No symbol table info available.
Backtrace stopped: previous frame inner to this frame (corrupt stack?)
.
Thread 2 (process 8856):
#0  0xf771f430 in __kernel_vsyscall ()
No symbol table info available.
#1  0x4897284c in ?? ()
No symbol table info available.
Backtrace stopped: previous frame inner to this frame (corrupt stack?)
.
Thread 1 (process 8843):
#0  0xd629b91c in ?? ()
No symbol table info available.