[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 18.768924] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 24.031943] random: sshd: uninitialized urandom read (32 bytes read) [ 24.460065] random: sshd: uninitialized urandom read (32 bytes read) [ 25.294330] random: sshd: uninitialized urandom read (32 bytes read) [ 66.597989] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.10.37' (ECDSA) to the list of known hosts. [ 72.077599] 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 [ 72.375352] kasan: CONFIG_KASAN_INLINE enabled [ 72.380073] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 72.387431] general protection fault: 0000 [#1] SMP KASAN [ 72.393823] CPU: 0 PID: 4480 Comm: syz-executor028 Not tainted 4.18.0-rc3+ #135 [ 72.401374] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 72.410750] RIP: 0010:__lock_acquire+0x245/0x5020 [ 72.415600] 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 [ 72.434803] RSP: 0018:ffff8801b57e7340 EFLAGS: 00010002 [ 72.440174] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000000 [ 72.447446] RDX: 0000000000000049 RSI: 0000000000000000 RDI: ffffffff88f1b060 [ 72.454889] RBP: ffff8801b57e76d0 R08: 0000000000000001 R09: 0000000000000000 [ 72.462213] R10: ffffed003b5c46d6 R11: 0000000000000001 R12: 0000000000000000 [ 72.469501] R13: 0000000000000248 R14: ffff8801b4a84400 R15: 0000000000000000 [ 72.476778] FS: 00007f74cd815700(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 [ 72.485013] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 72.490994] CR2: 00007ffd311f7c00 CR3: 00000001b4978000 CR4: 00000000001406f0 [ 72.498861] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 72.506147] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 72.513415] Call Trace: [ 72.515999] ? print_usage_bug+0xc0/0xc0 [ 72.520076] ? trace_hardirqs_on+0x10/0x10 [ 72.524488] ? __lock_acquire+0x7fc/0x5020 [ 72.528760] ? lock_downgrade+0x8f0/0x8f0 [ 72.532913] ? trace_hardirqs_on+0x10/0x10 [ 72.537138] ? is_bpf_text_address+0xd7/0x170 [ 72.541644] ? kernel_text_address+0x79/0xf0 [ 72.546053] ? __kernel_text_address+0xd/0x40 [ 72.550533] ? unwind_get_return_address+0x61/0xa0 [ 72.555461] ? __save_stack_trace+0x8d/0xf0 [ 72.559786] ? save_stack+0xa9/0xd0 [ 72.563406] lock_acquire+0x1e4/0x540 [ 72.567207] ? smap_list_hash_remove+0xa3/0x470 [ 72.571879] ? lock_release+0xa30/0xa30 [ 72.575853] ? graph_lock+0x170/0x170 [ 72.579646] ? print_usage_bug+0xc0/0xc0 [ 72.583695] ? find_held_lock+0x36/0x1c0 [ 72.587754] _raw_spin_lock_bh+0x31/0x40 [ 72.591802] ? smap_list_hash_remove+0xa3/0x470 [ 72.596457] smap_list_hash_remove+0xa3/0x470 [ 72.600949] ? psock_map_pop.isra.26+0x3b0/0x3b0 [ 72.605691] ? __lock_is_held+0xb5/0x140 [ 72.609756] sock_hash_ctx_update_elem.isra.27+0x1140/0x1690 [ 72.615555] ? sock_map_free+0x530/0x530 [ 72.619620] ? rcu_is_watching+0x8c/0x150 [ 72.623751] ? rcu_report_qs_rnp+0x7a0/0x7a0 [ 72.628143] ? __fget+0x414/0x670 [ 72.631591] ? expand_files.part.8+0x9c0/0x9c0 [ 72.636159] ? find_held_lock+0x36/0x1c0 [ 72.640222] sock_hash_update_elem+0x157/0x2f0 [ 72.644806] ? bpf_sock_hash_update+0x90/0x90 [ 72.649291] ? kasan_check_read+0x11/0x20 [ 72.653422] ? rcu_is_watching+0x8c/0x150 [ 72.657569] ? rcu_report_qs_rnp+0x7a0/0x7a0 [ 72.661967] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 72.667658] ? bpf_sock_hash_update+0x90/0x90 [ 72.672158] map_update_elem+0x5c4/0xc90 [ 72.676215] __x64_sys_bpf+0x32d/0x510 [ 72.680207] ? bpf_prog_get+0x20/0x20 [ 72.684036] ? do_syscall_64+0x9a/0x820 [ 72.688025] do_syscall_64+0x1b9/0x820 [ 72.692025] ? finish_task_switch+0x1d3/0x890 [ 72.696517] ? syscall_return_slowpath+0x5e0/0x5e0 [ 72.701540] ? syscall_return_slowpath+0x31d/0x5e0 [ 72.706494] ? entry_SYSCALL_64_after_hwframe+0x59/0xbe [ 72.711869] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 72.716724] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 72.721928] RIP: 0033:0x4457c9 [ 72.725107] 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 [ 72.744362] RSP: 002b:00007f74cd814db8 EFLAGS: 00000297 ORIG_RAX: 0000000000000141 [ 72.752066] RAX: ffffffffffffffda RBX: 00000000006dac44 RCX: 00000000004457c9 [ 72.759334] RDX: 0000000000000020 RSI: 0000000020000180 RDI: 0000000000000002 [ 72.767047] RBP: 00000000006dac40 R08: 0000000000000000 R09: 0000000000000000 [ 72.774322] R10: 0000000000000000 R11: 0000000000000297 R12: 0000000000000000 [ 72.781710] R13: 00007ffe4f6c728f R14: 00007f74cd8159c0 R15: 0000000000000007 [ 72.788972] Modules linked in: [ 72.792149] Dumping ftrace buffer: [ 72.795675] (ftrace buffer empty) [ 72.799484] ---[ end trace d57eae8f6ab8eb62 ]--- [ 72.804232] RIP: 0010:__lock_acquire+0x245/0x5020 [ 72.809052] 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 [ 72.828150] RSP: 0018:ffff8801b57e7340 EFLAGS: 00010002 [ 72.833495] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000000 [ 72.840766] RDX: 0000000000000049 RSI: 0000000000000000 RDI: ffffffff88f1b060 [ 72.848023] RBP: ffff8801b57e76d0 R08: 0000000000000001 R09: 0000000000000000 [ 72.855277] R10: ffffed003b5c46d6 R11: 0000000000000001 R12: 0000000000000000 [ 72.862546] R13: 0000000000000248 R14: ffff8801b4a84400 R15: 0000000000000000 [ 72.869846] FS: 00007f74cd815700(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 [ 72.878092] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 72.883971] CR2: 00007ffd311f7c00 CR3: 00000001b4978000 CR4: 00000000001406f0 [ 72.891230] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 72.898486] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 72.905963] Kernel panic - not syncing: Fatal exception in interrupt [ 72.912988] Dumping ftrace buffer: [ 72.916518] (ftrace buffer empty) [ 72.920223] Kernel Offset: disabled [ 72.924700] Rebooting in 86400 seconds..