[12978.024542] test_tcpnotify_[384079]: segfault at 7f341ec9b400 ip 0000000000407eea sp 00007f341e9feca0 error 4 in test_tcpnotify_user[407000+4a000] [12978.026511] Code: 48 8b 45 e8 88 10 eb 49 48 8b 45 f0 0f b7 10 48 8b 45 e8 66 89 10 eb 39 48 8b 45 f0 8b 10 48 8b 45 e8 89 10 eb 2b 48 8b 45 f0 <48> 8b 10 48 8b 45 e8 48 89 10 eb 1b 8b 45 e4 48 98 48 8b 4d e8 48