[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 21.530526] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 26.092691] random: sshd: uninitialized urandom read (32 bytes read) [ 26.711445] random: sshd: uninitialized urandom read (32 bytes read) [ 27.548104] random: sshd: uninitialized urandom read (32 bytes read) [ 27.713497] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.0.28' (ECDSA) to the list of known hosts. [ 33.181896] 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 [ 33.796950] kasan: CONFIG_KASAN_INLINE enabled [ 33.801568] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 33.808953] general protection fault: 0000 [#1] SMP KASAN [ 33.814478] CPU: 1 PID: 4577 Comm: syz-executor596 Not tainted 4.18.0-rc3+ #131 [ 33.821903] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 33.831256] RIP: 0010:__lock_acquire+0x245/0x5020 [ 33.836073] Code: 28 00 00 00 0f 85 03 34 00 00 48 8d 65 d8 5b 41 5c 41 5d 41 5e 41 5f 5d c3 48 b8 00 00 00 00 00 fc ff df 4c 89 ea 48 c1 ea 03 <80> 3c 02 00 0f 85 c6 35 00 00 49 81 7d 00 60 76 e7 89 0f 84 42 ff [ 33.855202] RSP: 0018:ffff8801d8e9f340 EFLAGS: 00010002 [ 33.860550] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000000 [ 33.867801] RDX: 0000000000000049 RSI: 0000000000000000 RDI: ffffffff88f1b060 [ 33.875053] RBP: ffff8801d8e9f6d0 R08: 0000000000000001 R09: 0000000000000000 [ 33.882304] R10: ffffed003b5e46d6 R11: 0000000000000001 R12: 0000000000000000 [ 33.889574] R13: 0000000000000248 R14: ffff8801abe3e6c0 R15: 0000000000000000 [ 33.896829] FS: 00007f22849fa700(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 [ 33.905054] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 33.910918] CR2: 00007ffcf67b2f20 CR3: 00000001abfac000 CR4: 00000000001406e0 [ 33.918177] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 33.925434] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 33.932685] Call Trace: [ 33.935268] ? print_usage_bug+0xc0/0xc0 [ 33.939315] ? trace_hardirqs_on+0x10/0x10 [ 33.943536] ? __lock_acquire+0x7fc/0x5020 [ 33.947760] ? lock_downgrade+0x8f0/0x8f0 [ 33.951897] ? trace_hardirqs_on+0x10/0x10 [ 33.956116] ? is_bpf_text_address+0xd7/0x170 [ 33.960599] ? kernel_text_address+0x79/0xf0 [ 33.964993] ? __kernel_text_address+0xd/0x40 [ 33.969476] ? unwind_get_return_address+0x61/0xa0 [ 33.974392] ? __save_stack_trace+0x8d/0xf0 [ 33.978715] ? save_stack+0xa9/0xd0 [ 33.982352] lock_acquire+0x1e4/0x540 [ 33.986141] ? smap_list_hash_remove+0xa3/0x470 [ 33.990796] ? lock_release+0xa30/0xa30 [ 33.994770] ? graph_lock+0x170/0x170 [ 33.998565] ? print_usage_bug+0xc0/0xc0 [ 34.002612] ? find_held_lock+0x36/0x1c0 [ 34.006660] _raw_spin_lock_bh+0x31/0x40 [ 34.010707] ? smap_list_hash_remove+0xa3/0x470 [ 34.015361] smap_list_hash_remove+0xa3/0x470 [ 34.019847] ? psock_map_pop.isra.26+0x3b0/0x3b0 [ 34.024608] ? __lock_is_held+0xb5/0x140 [ 34.028673] sock_hash_ctx_update_elem.isra.27+0x1140/0x1690 [ 34.034458] ? sock_map_free+0x530/0x530 [ 34.038503] ? rcu_is_watching+0x8c/0x150 [ 34.042648] ? rcu_report_qs_rnp+0x7a0/0x7a0 [ 34.047043] ? __fget+0x414/0x670 [ 34.050492] ? expand_files.part.8+0x9c0/0x9c0 [ 34.055060] ? find_held_lock+0x36/0x1c0 [ 34.059109] sock_hash_update_elem+0x157/0x2f0 [ 34.063677] ? bpf_sock_hash_update+0x90/0x90 [ 34.068159] ? kasan_check_read+0x11/0x20 [ 34.072304] ? rcu_is_watching+0x8c/0x150 [ 34.076449] ? rcu_report_qs_rnp+0x7a0/0x7a0 [ 34.080849] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 34.086373] ? bpf_sock_hash_update+0x90/0x90 [ 34.090857] map_update_elem+0x5c4/0xc90 [ 34.094908] __x64_sys_bpf+0x32d/0x510 [ 34.098795] ? bpf_prog_get+0x20/0x20 [ 34.102583] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 34.108110] ? do_syscall_64+0x9a/0x820 [ 34.112076] do_syscall_64+0x1b9/0x820 [ 34.115962] ? finish_task_switch+0x1d3/0x890 [ 34.120444] ? syscall_return_slowpath+0x5e0/0x5e0 [ 34.125360] ? syscall_return_slowpath+0x31d/0x5e0 [ 34.130279] ? entry_SYSCALL_64_after_hwframe+0x59/0xbe [ 34.135629] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 34.140459] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 34.145633] RIP: 0033:0x4457d9 [ 34.148805] Code: e8 3c b6 02 00 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 12 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 34.167960] RSP: 002b:00007f22849f9db8 EFLAGS: 00000297 ORIG_RAX: 0000000000000141 [ 34.175666] RAX: ffffffffffffffda RBX: 00000000006dac24 RCX: 00000000004457d9 [ 34.182918] RDX: 0000000000000020 RSI: 0000000020000180 RDI: 0000000000000002 [ 34.190173] RBP: 00000000006dac20 R08: 0000000000000000 R09: 0000000000000000 [ 34.197424] R10: 0000000000000000 R11: 0000000000000297 R12: 0000000000000000 [ 34.204676] R13: 00007ffd0e61242f R14: 00007f22849fa9c0 R15: 0000000000000007 [ 34.211948] Modules linked in: [ 34.215128] Dumping ftrace buffer: [ 34.218645] (ftrace buffer empty) [ 34.222359] ---[ end trace 92c28adbff98cb97 ]--- [ 34.227210] RIP: 0010:__lock_acquire+0x245/0x5020 [ 34.232030] Code: 28 00 00 00 0f 85 03 34 00 00 48 8d 65 d8 5b 41 5c 41 5d 41 5e 41 5f 5d c3 48 b8 00 00 00 00 00 fc ff df 4c 89 ea 48 c1 ea 03 <80> 3c 02 00 0f 85 c6 35 00 00 49 81 7d 00 60 76 e7 89 0f 84 42 ff [ 34.251186] RSP: 0018:ffff8801d8e9f340 EFLAGS: 00010002 [ 34.256545] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000000 [ 34.263811] RDX: 0000000000000049 RSI: 0000000000000000 RDI: ffffffff88f1b060 [ 34.271062] RBP: ffff8801d8e9f6d0 R08: 0000000000000001 R09: 0000000000000000 [ 34.278749] R10: ffffed003b5e46d6 R11: 0000000000000001 R12: 0000000000000000 [ 34.286006] R13: 0000000000000248 R14: ffff8801abe3e6c0 R15: 0000000000000000 [ 34.293276] FS: 00007f22849fa700(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 [ 34.301483] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 34.307347] CR2: 00007ffcf67b2f20 CR3: 00000001abfac000 CR4: 00000000001406e0 [ 34.314614] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 34.321878] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 34.329133] Kernel panic - not syncing: Fatal exception in interrupt [ 34.336206] Dumping ftrace buffer: [ 34.339740] (ftrace buffer empty) [ 34.343427] Kernel Offset: disabled [ 34.347042] Rebooting in 86400 seconds..