. Thread 3 (LWP 2462): #0 0xb77c2424 in __kernel_vsyscall () No symbol table info available. #1 0xb6ba6dcb in ?? () No symbol table info available. #2 0xb6eae000 in ?? () No symbol table info available. Backtrace stopped: previous frame inner to this frame (corrupt stack?) . Thread 2 (LWP 2461): #0 0xb77c2424 in __kernel_vsyscall () No symbol table info available. #1 0xb6ba6dcb in ?? () No symbol table info available. #2 0xb6eae000 in ?? () No symbol table info available. Backtrace stopped: previous frame inner to this frame (corrupt stack?) . Thread 1 (LWP 2443): #0 0xb77c2424 in __kernel_vsyscall () No symbol table info available. #1 0xb6af3b1f in ?? () No symbol table info available. #2 0xb6c74000 in ?? () No symbol table info available. #3 0x00000030 in ?? () No symbol table info available. #4 0xb6eae000 in ?? () No symbol table info available. Backtrace stopped: previous frame inner to this frame (corrupt stack?)