[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 15.938656] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 19.970353] random: sshd: uninitialized urandom read (32 bytes read) [ 20.565970] random: sshd: uninitialized urandom read (32 bytes read) [ 21.255131] random: sshd: uninitialized urandom read (32 bytes read) [ 21.393423] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.0.27' (ECDSA) to the list of known hosts. [ 26.796491] random: sshd: uninitialized urandom read (32 bytes read) executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 27.189726] kasan: CONFIG_KASAN_INLINE enabled [ 27.194345] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 27.201705] general protection fault: 0000 [#1] SMP KASAN [ 27.207239] CPU: 1 PID: 4494 Comm: syz-executor721 Not tainted 4.18.0-rc3-next-20180706+ #1 [ 27.215714] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 27.225075] RIP: 0010:perf_trace_lock_acquire+0xc8/0x9a0 executing program executing program executing program executing program executing program [ 27.230512] Code: 20 f2 f2 f2 f2 c7 40 24 00 f2 f2 f2 65 48 8b 04 25 28 00 00 00 48 89 45 d0 31 c0 48 8d 46 18 48 89 85 70 fe ff ff 48 c1 e8 03 <80> 3c 10 00 0f 85 8a 05 00 00 49 8b 79 18 48 85 ff 0f 84 72 04 00 [ 27.249715] RSP: 0018:ffff8801b9c8f508 EFLAGS: 00010002 [ 27.255073] RAX: 000000000000004c RBX: 1ffff10037391eab RCX: 0000000000000000 [ 27.262337] RDX: dffffc0000000000 RSI: 0000000000000248 RDI: ffffffff88f7b940 [ 27.269602] RBP: ffff8801b9c8f6e0 R08: 0000000000000000 R09: 0000000000000248 [ 27.276869] R10: ffffffff815e24a0 R11: dffffc0000000000 R12: ffff8801b9c8f6b8 executing program executing program executing program executing program [ 27.284136] R13: 0000000000000000 R14: 0000000000000001 R15: ffffffff88f7b940 [ 27.291404] FS: 00007f8b8802c700(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 [ 27.299625] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 27.305499] CR2: 00007fc8e94c5390 CR3: 00000001ce547000 CR4: 00000000001406e0 [ 27.312763] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 27.320029] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 27.327286] Call Trace: [ 27.329888] ? trace_hardirqs_on+0x10/0x10 [ 27.334126] ? perf_trace_lock+0x920/0x920 executing program executing program executing program [ 27.338362] ? is_bpf_text_address+0xd7/0x170 [ 27.342856] ? kernel_text_address+0x79/0xf0 [ 27.347269] ? __kernel_text_address+0xd/0x40 [ 27.351764] ? unwind_get_return_address+0x61/0xa0 [ 27.356692] ? __save_stack_trace+0x8d/0xf0 [ 27.361011] ? perf_trace_lock_acquire+0xeb/0x9a0 [ 27.365851] ? perf_trace_lock+0x920/0x920 [ 27.370087] ? save_stack+0xa9/0xd0 [ 27.373708] ? save_stack+0x43/0xd0 [ 27.377338] lock_acquire+0x3a2/0x540 [ 27.381141] ? smap_list_hash_remove+0xa3/0x470 [ 27.385803] ? perf_trace_lock_acquire+0xeb/0x9a0 executing program executing program executing program executing program executing program [ 27.390643] ? lock_release+0xa30/0xa30 [ 27.394618] ? perf_trace_lock+0x920/0x920 [ 27.398852] ? lock_acquire+0x1e4/0x540 [ 27.402828] ? is_bpf_text_address+0xae/0x170 [ 27.407322] _raw_spin_lock_bh+0x31/0x40 [ 27.411384] ? smap_list_hash_remove+0xa3/0x470 [ 27.416052] smap_list_hash_remove+0xa3/0x470 [ 27.420545] ? psock_map_pop.isra.26+0x3b0/0x3b0 [ 27.425296] ? do_raw_spin_unlock+0xa7/0x2f0 [ 27.429700] ? do_raw_spin_trylock+0x1c0/0x1c0 [ 27.434281] ? sock_hash_ctx_update_elem.isra.27+0xe5e/0x1690 executing program executing program executing program executing program executing program [ 27.440161] ? trace_hardirqs_on+0xd/0x10 [ 27.444308] ? __local_bh_enable_ip+0x161/0x230 [ 27.448976] sock_hash_ctx_update_elem.isra.27+0x1140/0x1690 [ 27.454773] ? sock_map_free+0x530/0x530 [ 27.458833] ? __fget+0x4d5/0x740 [ 27.462292] ? ksys_dup3+0x690/0x690 [ 27.466005] ? trace_hardirqs_off+0xd/0x10 [ 27.470238] ? lock_acquire+0x1e4/0x540 [ 27.474210] ? lock_acquire+0x1e4/0x540 [ 27.478185] sock_hash_update_elem+0x157/0x2f0 [ 27.482765] ? bpf_sock_hash_update+0x90/0x90 [ 27.487256] ? lock_release+0xa30/0xa30 executing program executing program executing program executing program [ 27.491233] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 27.496768] ? bpf_sock_hash_update+0x90/0x90 [ 27.501261] map_update_elem+0x5c4/0xc90 [ 27.505324] __x64_sys_bpf+0x32d/0x510 [ 27.509212] ? bpf_prog_get+0x20/0x20 [ 27.513015] do_syscall_64+0x1b9/0x820 [ 27.516900] ? syscall_return_slowpath+0x5e0/0x5e0 [ 27.521824] ? syscall_return_slowpath+0x31d/0x5e0 [ 27.526752] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 27.531767] ? trace_hardirqs_off_thunk+0x1a/0x1c executing program executing program executing program executing program [ 27.536609] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 27.541795] RIP: 0033:0x448369 [ 27.544973] Code: e8 bc e7 ff ff 48 83 c4 18 c3 0f 1f 80 00 00 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 2b 0e fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 27.564173] RSP: 002b:00007f8b8802bce8 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 [ 27.571879] RAX: ffffffffffffffda RBX: 00000000006ddc5c RCX: 0000000000448369 [ 27.579143] RDX: 0000000000000020 RSI: 0000000020000180 RDI: 0000000000000002 executing program executing program executing program executing program executing program [ 27.586406] RBP: 00000000006ddc58 R08: 0000000000000000 R09: 0000000000000000 [ 27.593668] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 [ 27.600930] R13: 00007fffd84c10ff R14: 00007f8b8802c9c0 R15: 000000000000000b [ 27.608191] Modules linked in: [ 27.611383] Dumping ftrace buffer: [ 27.614912] (ftrace buffer empty) [ 27.618625] ---[ end trace ff5853f6a56388cd ]--- [ 27.623384] RIP: 0010:perf_trace_lock_acquire+0xc8/0x9a0 executing program executing program executing program executing program [ 27.628822] Code: 20 f2 f2 f2 f2 c7 40 24 00 f2 f2 f2 65 48 8b 04 25 28 00 00 00 48 89 45 d0 31 c0 48 8d 46 18 48 89 85 70 fe ff ff 48 c1 e8 03 <80> 3c 10 00 0f 85 8a 05 00 00 49 8b 79 18 48 85 ff 0f 84 72 04 00 [ 27.648026] RSP: 0018:ffff8801b9c8f508 EFLAGS: 00010002 [ 27.653382] RAX: 000000000000004c RBX: 1ffff10037391eab RCX: 0000000000000000 [ 27.660647] RDX: dffffc0000000000 RSI: 0000000000000248 RDI: ffffffff88f7b940 [ 27.667909] RBP: ffff8801b9c8f6e0 R08: 0000000000000000 R09: 0000000000000248 [ 27.675172] R10: ffffffff815e24a0 R11: dffffc0000000000 R12: ffff8801b9c8f6b8 [ 27.682434] R13: 0000000000000000 R14: 0000000000000001 R15: ffffffff88f7b940 executing program executing program executing program [ 27.689701] FS: 00007f8b8802c700(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 [ 27.697922] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 27.703795] CR2: 00007fc8e94c5390 CR3: 00000001ce547000 CR4: 00000000001406e0 [ 27.711060] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 27.718323] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 27.725586] Kernel panic - not syncing: Fatal exception in interrupt [ 27.732522] Dumping ftrace buffer: [ 27.736047] (ftrace buffer empty) [ 27.739731] Kernel Offset: disabled [ 27.743332] Rebooting in 86400 seconds..