[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 18.410831] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 23.041331] random: sshd: uninitialized urandom read (32 bytes read) [ 23.472731] random: sshd: uninitialized urandom read (32 bytes read) [ 24.296647] random: sshd: uninitialized urandom read (32 bytes read) [ 711.025553] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.15.205' (ECDSA) to the list of known hosts. [ 716.505614] 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 [ 716.658591] kasan: CONFIG_KASAN_INLINE enabled [ 716.663187] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 716.670558] general protection fault: 0000 [#1] SMP KASAN [ 716.676073] CPU: 1 PID: 4527 Comm: syz-executor842 Not tainted 4.18.0-rc3+ #1 [ 716.683320] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 716.692721] RIP: 0010:__lock_acquire+0x245/0x5020 [ 716.697551] 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 [ 716.716665] RSP: 0018:ffff8801b0da7340 EFLAGS: 00010002 [ 716.722004] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000000 [ 716.729251] RDX: 0000000000000049 RSI: 0000000000000000 RDI: ffffffff88f1b060 [ 716.736498] RBP: ffff8801b0da76d0 R08: 0000000000000001 R09: 0000000000000000 [ 716.743743] R10: ffffed003b5e46d6 R11: 0000000000000001 R12: 0000000000000000 [ 716.750987] R13: 0000000000000248 R14: ffff8801d8ef26c0 R15: 0000000000000000 [ 716.758234] FS: 00007f42b8d8f700(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 [ 716.766433] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 716.772288] CR2: 00007ffe51dd6ac0 CR3: 00000001d961c000 CR4: 00000000001406e0 [ 716.779550] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 716.786798] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 716.794041] Call Trace: [ 716.796612] ? print_usage_bug+0xc0/0xc0 [ 716.800651] ? trace_hardirqs_on+0x10/0x10 [ 716.804861] ? __lock_acquire+0x7fc/0x5020 [ 716.809073] ? lock_downgrade+0x8f0/0x8f0 [ 716.813199] ? trace_hardirqs_on+0x10/0x10 [ 716.817408] ? is_bpf_text_address+0xd7/0x170 [ 716.821879] ? kernel_text_address+0x79/0xf0 [ 716.826263] ? __kernel_text_address+0xd/0x40 [ 716.830734] ? unwind_get_return_address+0x61/0xa0 [ 716.835639] ? __save_stack_trace+0x8d/0xf0 [ 716.839937] ? save_stack+0xa9/0xd0 [ 716.843540] lock_acquire+0x1e4/0x540 [ 716.847318] ? smap_list_hash_remove+0xa3/0x470 [ 716.851962] ? lock_release+0xa30/0xa30 [ 716.855926] ? graph_lock+0x170/0x170 [ 716.859701] ? print_usage_bug+0xc0/0xc0 [ 716.863738] ? find_held_lock+0x36/0x1c0 [ 716.867858] _raw_spin_lock_bh+0x31/0x40 [ 716.871896] ? smap_list_hash_remove+0xa3/0x470 [ 716.876544] smap_list_hash_remove+0xa3/0x470 [ 716.881017] ? psock_map_pop.isra.26+0x3b0/0x3b0 [ 716.885750] ? __lock_is_held+0xb5/0x140 [ 716.889794] sock_hash_ctx_update_elem.isra.27+0x1140/0x1690 [ 716.895568] ? sock_map_free+0x530/0x530 [ 716.899615] ? rcu_is_watching+0x8c/0x150 [ 716.903740] ? rcu_report_qs_rnp+0x7a0/0x7a0 [ 716.908125] ? __fget+0x414/0x670 [ 716.911554] ? expand_files.part.8+0x9c0/0x9c0 [ 716.916110] ? find_held_lock+0x36/0x1c0 [ 716.920151] sock_hash_update_elem+0x157/0x2f0 [ 716.924711] ? bpf_sock_hash_update+0x90/0x90 [ 716.929184] ? kasan_check_read+0x11/0x20 [ 716.933304] ? rcu_is_watching+0x8c/0x150 [ 716.937427] ? rcu_report_qs_rnp+0x7a0/0x7a0 [ 716.941823] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 716.947337] ? bpf_sock_hash_update+0x90/0x90 [ 716.951809] map_update_elem+0x5c4/0xc90 [ 716.955857] __x64_sys_bpf+0x32d/0x510 [ 716.959721] ? bpf_prog_get+0x20/0x20 [ 716.963498] ? kasan_check_read+0x11/0x20 [ 716.967623] ? _raw_spin_unlock_irq+0x27/0x70 [ 716.972096] ? do_syscall_64+0x9a/0x820 [ 716.976047] do_syscall_64+0x1b9/0x820 [ 716.979923] ? syscall_return_slowpath+0x5e0/0x5e0 [ 716.984835] ? syscall_return_slowpath+0x31d/0x5e0 [ 716.989751] ? entry_SYSCALL_64_after_hwframe+0x59/0xbe [ 716.995092] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 716.999912] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 717.005076] RIP: 0033:0x445fa9 [ 717.008238] Code: e8 7c bf 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 3b 11 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 717.027320] RSP: 002b:00007f42b8d8ece8 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 [ 717.035014] RAX: ffffffffffffffda RBX: 00000000006dbc3c RCX: 0000000000445fa9 [ 717.042260] RDX: 0000000000000020 RSI: 0000000020000180 RDI: 0000000000000002 [ 717.049504] RBP: 00000000006dbc38 R08: 0000000000000000 R09: 0000000000000000 [ 717.056751] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 [ 717.064009] R13: 00007ffc0dc8fd6f R14: 00007f42b8d8f9c0 R15: 0000000000000005 [ 717.071263] Modules linked in: [ 717.074434] Dumping ftrace buffer: [ 717.077946] (ftrace buffer empty) [ 717.081639] ---[ end trace 41e0f7d367731f90 ]--- [ 717.086389] RIP: 0010:__lock_acquire+0x245/0x5020 [ 717.091220] 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 [ 717.110313] RSP: 0018:ffff8801b0da7340 EFLAGS: 00010002 [ 717.115653] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000000 [ 717.122897] RDX: 0000000000000049 RSI: 0000000000000000 RDI: ffffffff88f1b060 [ 717.130140] RBP: ffff8801b0da76d0 R08: 0000000000000001 R09: 0000000000000000 [ 717.137383] R10: ffffed003b5e46d6 R11: 0000000000000001 R12: 0000000000000000 [ 717.144626] R13: 0000000000000248 R14: ffff8801d8ef26c0 R15: 0000000000000000 [ 717.151880] FS: 00007f42b8d8f700(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 [ 717.160090] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 717.165945] CR2: 00007ffe51dd6ac0 CR3: 00000001d961c000 CR4: 00000000001406e0 [ 717.173196] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 717.180442] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 717.187690] Kernel panic - not syncing: Fatal exception in interrupt [ 717.194560] Dumping ftrace buffer: [ 717.198076] (ftrace buffer empty) [ 717.201776] Kernel Offset: disabled [ 717.205379] Rebooting in 86400 seconds..