[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 20.515467] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 23.125112] random: sshd: uninitialized urandom read (32 bytes read) [ 23.506580] random: sshd: uninitialized urandom read (32 bytes read) [ 24.350282] random: sshd: uninitialized urandom read (32 bytes read) [ 125.994510] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.15.203' (ECDSA) to the list of known hosts. [ 131.453060] 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 [ 131.714528] kasan: CONFIG_KASAN_INLINE enabled [ 131.719140] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 131.726506] general protection fault: 0000 [#1] SMP KASAN [ 131.732216] CPU: 0 PID: 4573 Comm: syz-executor746 Not tainted 4.18.0-rc3+ #133 [ 131.739641] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 131.748985] RIP: 0010:__lock_acquire+0x245/0x5020 [ 131.753801] 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 86 e7 89 0f 84 42 ff [ 131.772892] RSP: 0018:ffff8801abbb7340 EFLAGS: 00010002 [ 131.778239] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000000 [ 131.785488] RDX: 0000000000000049 RSI: 0000000000000000 RDI: ffffffff88f1b060 [ 131.792736] RBP: ffff8801abbb76d0 R08: 0000000000000001 R09: 0000000000000000 [ 131.799984] R10: ffffed003b5c46d6 R11: 0000000000000001 R12: 0000000000000000 [ 131.807232] R13: 0000000000000248 R14: ffff8801d97a2400 R15: 0000000000000000 [ 131.814481] FS: 00007f0dacb23700(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 [ 131.822689] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 131.828556] CR2: 00007ffc0e9b7c3c CR3: 00000001d93d9000 CR4: 00000000001406f0 [ 131.835804] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 131.843053] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 131.850299] Call Trace: [ 131.852871] ? print_usage_bug+0xc0/0xc0 [ 131.856918] ? trace_hardirqs_on+0x10/0x10 [ 131.861133] ? __lock_acquire+0x7fc/0x5020 [ 131.865347] ? lock_downgrade+0x8f0/0x8f0 [ 131.869483] ? trace_hardirqs_on+0x10/0x10 [ 131.873697] ? is_bpf_text_address+0xd7/0x170 [ 131.878175] ? kernel_text_address+0x79/0xf0 [ 131.882565] ? __kernel_text_address+0xd/0x40 [ 131.887044] ? unwind_get_return_address+0x61/0xa0 [ 131.891953] ? __save_stack_trace+0x8d/0xf0 [ 131.896255] ? save_stack+0xa9/0xd0 [ 131.899863] lock_acquire+0x1e4/0x540 [ 131.903643] ? smap_list_hash_remove+0xa3/0x470 [ 131.908292] ? lock_release+0xa30/0xa30 [ 131.912246] ? graph_lock+0x170/0x170 [ 131.916029] ? print_usage_bug+0xc0/0xc0 [ 131.920106] ? find_held_lock+0x36/0x1c0 [ 131.924164] _raw_spin_lock_bh+0x31/0x40 [ 131.928208] ? smap_list_hash_remove+0xa3/0x470 [ 131.932866] smap_list_hash_remove+0xa3/0x470 [ 131.937359] ? psock_map_pop.isra.26+0x3b0/0x3b0 [ 131.942113] ? __lock_is_held+0xb5/0x140 [ 131.946166] sock_hash_ctx_update_elem.isra.27+0x1140/0x1690 [ 131.952128] ? sock_map_free+0x530/0x530 [ 131.956189] ? rcu_is_watching+0x8c/0x150 [ 131.960332] ? rcu_report_qs_rnp+0x7a0/0x7a0 [ 131.964720] ? __fget+0x414/0x670 [ 131.968153] ? expand_files.part.8+0x9c0/0x9c0 [ 131.972716] ? find_held_lock+0x36/0x1c0 [ 131.976761] sock_hash_update_elem+0x157/0x2f0 [ 131.981325] ? bpf_sock_hash_update+0x90/0x90 [ 131.985802] ? kasan_check_read+0x11/0x20 [ 131.989935] ? rcu_is_watching+0x8c/0x150 [ 131.994061] ? rcu_report_qs_rnp+0x7a0/0x7a0 [ 131.998449] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 132.003964] ? bpf_sock_hash_update+0x90/0x90 [ 132.008439] map_update_elem+0x5c4/0xc90 [ 132.012496] __x64_sys_bpf+0x32d/0x510 [ 132.016372] ? bpf_prog_get+0x20/0x20 [ 132.020154] ? do_syscall_64+0x9a/0x820 [ 132.024108] do_syscall_64+0x1b9/0x820 [ 132.027972] ? finish_task_switch+0x1d3/0x890 [ 132.032462] ? syscall_return_slowpath+0x5e0/0x5e0 [ 132.037370] ? syscall_return_slowpath+0x31d/0x5e0 [ 132.042291] ? entry_SYSCALL_64_after_hwframe+0x59/0xbe [ 132.047633] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 132.052456] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 132.057622] RIP: 0033:0x445d19 [ 132.060785] Code: e8 2c b7 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 [ 132.079880] RSP: 002b:00007f0dacb22ce8 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 [ 132.087574] RAX: ffffffffffffffda RBX: 00000000006dac24 RCX: 0000000000445d19 [ 132.094830] RDX: 0000000000000020 RSI: 0000000020000180 RDI: 0000000000000002 [ 132.102078] RBP: 00000000006dac20 R08: 0000000000000000 R09: 0000000000000000 [ 132.109326] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 [ 132.116574] R13: 00007ffe1f7e16ef R14: 00007f0dacb239c0 R15: 0000000000000005 [ 132.123850] Modules linked in: [ 132.127025] Dumping ftrace buffer: [ 132.130539] (ftrace buffer empty) [ 132.134233] ---[ end trace cf18adb14adf0182 ]--- [ 132.138976] RIP: 0010:__lock_acquire+0x245/0x5020 [ 132.143790] 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 86 e7 89 0f 84 42 ff [ 132.162878] RSP: 0018:ffff8801abbb7340 EFLAGS: 00010002 [ 132.168224] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000000 [ 132.175488] RDX: 0000000000000049 RSI: 0000000000000000 RDI: ffffffff88f1b060 [ 132.182735] RBP: ffff8801abbb76d0 R08: 0000000000000001 R09: 0000000000000000 [ 132.189981] R10: ffffed003b5c46d6 R11: 0000000000000001 R12: 0000000000000000 [ 132.197226] R13: 0000000000000248 R14: ffff8801d97a2400 R15: 0000000000000000 [ 132.204475] FS: 00007f0dacb23700(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 [ 132.212676] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 132.218532] CR2: 00007ffc0e9b7c3c CR3: 00000001d93d9000 CR4: 00000000001406f0 [ 132.225780] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 132.233045] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 132.240310] Kernel panic - not syncing: Fatal exception in interrupt [ 132.247198] Dumping ftrace buffer: [ 132.250731] (ftrace buffer empty) [ 132.254417] Kernel Offset: disabled [ 132.258021] Rebooting in 86400 seconds..