[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 19.443352] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 21.432282] random: sshd: uninitialized urandom read (32 bytes read) [ 21.696689] random: sshd: uninitialized urandom read (32 bytes read) [ 22.589902] random: sshd: uninitialized urandom read (32 bytes read) [ 820.980493] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.10.43' (ECDSA) to the list of known hosts. [ 826.500821] 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 [ 826.723924] kasan: CONFIG_KASAN_INLINE enabled [ 826.728559] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 826.735944] general protection fault: 0000 [#1] SMP KASAN [ 826.741465] CPU: 1 PID: 4547 Comm: syz-executor782 Not tainted 4.18.0-rc5+ #152 [ 826.748890] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 826.758352] RIP: 0010:__lock_acquire+0x245/0x5020 [ 826.763177] 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 [ 826.782278] RSP: 0018:ffff8801d8e57540 EFLAGS: 00010002 [ 826.787625] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000000 [ 826.794874] RDX: 0000000000000049 RSI: 0000000000000000 RDI: ffffffff88f1b060 [ 826.802128] RBP: ffff8801d8e578c8 R08: 0000000000000001 R09: 0000000000000000 [ 826.809377] R10: ffffed003b5e46d6 R11: 0000000000000001 R12: 0000000000000000 [ 826.816629] R13: 0000000000000248 R14: ffff8801d8caa640 R15: 0000000000000000 [ 826.823883] FS: 00007f261c6de700(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 [ 826.832098] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 826.837964] CR2: 000055f4155bbaa8 CR3: 00000001d92c2000 CR4: 00000000001406e0 [ 826.845224] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 826.852473] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 826.859728] Call Trace: [ 826.862322] ? find_held_lock+0x36/0x1c0 [ 826.866365] ? trace_hardirqs_on+0x10/0x10 [ 826.870668] ? kasan_check_read+0x11/0x20 [ 826.874795] ? do_raw_spin_unlock+0xa7/0x2f0 [ 826.879208] ? __local_bh_enable_ip+0x161/0x230 [ 826.883859] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 826.888913] ? __sock_map_ctx_update_elem.isra.20+0x925/0x1530 [ 826.894863] ? trace_hardirqs_on+0xd/0x10 [ 826.898990] ? __local_bh_enable_ip+0x161/0x230 [ 826.903718] ? _raw_spin_unlock_bh+0x30/0x40 [ 826.908111] ? __sock_map_ctx_update_elem.isra.20+0x4ef/0x1530 [ 826.914077] ? sock_map_delete_elem+0x500/0x500 [ 826.918739] ? __lock_acquire+0x7fc/0x5020 [ 826.922953] ? lock_downgrade+0x8f0/0x8f0 [ 826.927087] ? graph_lock+0x170/0x170 [ 826.930885] ? trace_hardirqs_on+0x10/0x10 [ 826.935106] lock_acquire+0x1e4/0x540 [ 826.938894] ? smap_list_map_remove+0x96/0x350 [ 826.943453] ? lock_release+0xa30/0xa30 [ 826.947416] ? lock_downgrade+0x8f0/0x8f0 [ 826.951590] ? __save_stack_trace+0x8d/0xf0 [ 826.955911] ? graph_lock+0x170/0x170 [ 826.959773] ? rcu_is_watching+0x8c/0x150 [ 826.963907] _raw_spin_lock_bh+0x31/0x40 [ 826.968052] ? smap_list_map_remove+0x96/0x350 [ 826.972615] smap_list_map_remove+0x96/0x350 [ 826.977007] ? smap_tx_work+0xcd0/0xcd0 [ 826.980970] sock_map_ctx_update_elem.isra.21+0x3ab/0x570 [ 826.986502] ? __sock_map_ctx_update_elem.isra.20+0x1530/0x1530 [ 826.992552] sock_map_update_elem+0x1b9/0x3b0 [ 826.997135] ? bpf_sock_map_update+0x60/0x60 [ 827.001892] ? kasan_check_read+0x11/0x20 [ 827.006019] ? rcu_is_watching+0x8c/0x150 [ 827.010144] ? rcu_report_qs_rnp+0x7a0/0x7a0 [ 827.014602] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 827.020128] ? bpf_sock_map_update+0x60/0x60 [ 827.024535] map_update_elem+0x5c4/0xc90 [ 827.028578] __x64_sys_bpf+0x32d/0x510 [ 827.032446] ? bpf_prog_get+0x20/0x20 [ 827.036228] ? kasan_check_read+0x11/0x20 [ 827.040369] ? _raw_spin_unlock_irq+0x27/0x70 [ 827.044964] ? do_syscall_64+0x9a/0x820 [ 827.048919] do_syscall_64+0x1b9/0x820 [ 827.052794] ? syscall_return_slowpath+0x5e0/0x5e0 [ 827.057704] ? syscall_return_slowpath+0x31d/0x5e0 [ 827.062623] ? entry_SYSCALL_64_after_hwframe+0x59/0xbe [ 827.067976] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 827.072802] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 827.077983] RIP: 0033:0x445689 [ 827.081149] 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 [ 827.100252] RSP: 002b:00007f261c6dddb8 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 [ 827.107940] RAX: ffffffffffffffda RBX: 00000000006dac3c RCX: 0000000000445689 [ 827.115200] RDX: 0000000000000020 RSI: 0000000020000000 RDI: 0000000000000002 [ 827.122546] RBP: 00000000006dac38 R08: 0000000000000000 R09: 0000000000000000 [ 827.129795] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 [ 827.137048] R13: 00007ffe732c6f4f R14: 00007f261c6de9c0 R15: 0000000000000005 [ 827.144307] Modules linked in: [ 827.147494] Dumping ftrace buffer: [ 827.151013] (ftrace buffer empty) [ 827.154764] ---[ end trace afce4fc657d047ca ]--- [ 827.159509] RIP: 0010:__lock_acquire+0x245/0x5020 [ 827.164325] 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 [ 827.183515] RSP: 0018:ffff8801d8e57540 EFLAGS: 00010002 [ 827.189000] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000000 [ 827.196266] RDX: 0000000000000049 RSI: 0000000000000000 RDI: ffffffff88f1b060 [ 827.203517] RBP: ffff8801d8e578c8 R08: 0000000000000001 R09: 0000000000000000 [ 827.210769] R10: ffffed003b5e46d6 R11: 0000000000000001 R12: 0000000000000000 [ 827.218022] R13: 0000000000000248 R14: ffff8801d8caa640 R15: 0000000000000000 [ 827.225283] FS: 00007f261c6de700(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 [ 827.233493] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 827.239442] CR2: 000055f4155bbaa8 CR3: 00000001d92c2000 CR4: 00000000001406e0 [ 827.246700] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 827.253971] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 827.261245] Kernel panic - not syncing: Fatal exception in interrupt [ 827.268170] Dumping ftrace buffer: [ 827.271688] (ftrace buffer empty) [ 827.275650] Kernel Offset: disabled [ 827.279274] Rebooting in 86400 seconds..