[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 19.435579] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 23.919527] random: sshd: uninitialized urandom read (32 bytes read) [ 24.224280] random: sshd: uninitialized urandom read (32 bytes read) [ 25.069880] random: sshd: uninitialized urandom read (32 bytes read) [ 28.446806] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.10.50' (ECDSA) to the list of known hosts. [ 33.956492] 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 [ 34.176023] kasan: CONFIG_KASAN_INLINE enabled [ 34.180643] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 34.188004] general protection fault: 0000 [#1] SMP KASAN [ 34.193536] CPU: 1 PID: 4544 Comm: syz-executor282 Not tainted 4.18.0-rc4+ #142 [ 34.200960] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 34.210308] RIP: 0010:__lock_acquire+0x245/0x5020 [ 34.215126] 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 [ 34.234251] RSP: 0018:ffff8801d9237340 EFLAGS: 00010002 [ 34.239596] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000000 [ 34.246846] RDX: 0000000000000049 RSI: 0000000000000000 RDI: ffffffff88f1b060 [ 34.254110] RBP: ffff8801d92376d0 R08: 0000000000000001 R09: 0000000000000000 [ 34.261360] R10: ffffed003b5e46d6 R11: 0000000000000001 R12: 0000000000000000 [ 34.268609] R13: 0000000000000248 R14: ffff8801d8d84680 R15: 0000000000000000 [ 34.275859] FS: 00007f74b7ff1700(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 [ 34.284068] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 34.289928] CR2: 00007ffc90f1fce0 CR3: 00000001d92c4000 CR4: 00000000001406e0 [ 34.297179] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 34.304430] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 34.311689] Call Trace: [ 34.314263] ? print_usage_bug+0xc0/0xc0 [ 34.318311] ? trace_hardirqs_on+0x10/0x10 [ 34.322542] ? __lock_acquire+0x7fc/0x5020 [ 34.326759] ? lock_downgrade+0x8f0/0x8f0 [ 34.330892] ? trace_hardirqs_on+0x10/0x10 [ 34.335107] ? is_bpf_text_address+0xd7/0x170 [ 34.339591] ? kernel_text_address+0x79/0xf0 [ 34.343981] ? __kernel_text_address+0xd/0x40 [ 34.348461] ? unwind_get_return_address+0x61/0xa0 [ 34.353376] ? __save_stack_trace+0x8d/0xf0 [ 34.357697] ? save_stack+0xa9/0xd0 [ 34.361310] lock_acquire+0x1e4/0x540 [ 34.365095] ? smap_list_hash_remove+0xa3/0x470 [ 34.369746] ? lock_release+0xa30/0xa30 [ 34.373704] ? graph_lock+0x170/0x170 [ 34.377485] ? print_usage_bug+0xc0/0xc0 [ 34.381529] ? find_held_lock+0x36/0x1c0 [ 34.385576] _raw_spin_lock_bh+0x31/0x40 [ 34.389617] ? smap_list_hash_remove+0xa3/0x470 [ 34.394266] smap_list_hash_remove+0xa3/0x470 [ 34.398743] ? psock_map_pop.isra.26+0x3b0/0x3b0 [ 34.403479] ? __lock_is_held+0xb5/0x140 [ 34.407525] sock_hash_ctx_update_elem.isra.27+0x1140/0x1690 [ 34.413305] ? sock_map_free+0x530/0x530 [ 34.417346] ? rcu_is_watching+0x8c/0x150 [ 34.421473] ? rcu_report_qs_rnp+0x7a0/0x7a0 [ 34.425863] ? __fget+0x414/0x670 [ 34.429297] ? expand_files.part.8+0x9c0/0x9c0 [ 34.433861] ? find_held_lock+0x36/0x1c0 [ 34.437909] sock_hash_update_elem+0x157/0x2f0 [ 34.442472] ? bpf_sock_hash_update+0x90/0x90 [ 34.446950] ? kasan_check_read+0x11/0x20 [ 34.451077] ? rcu_is_watching+0x8c/0x150 [ 34.455204] ? rcu_report_qs_rnp+0x7a0/0x7a0 [ 34.459593] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 34.465112] ? bpf_sock_hash_update+0x90/0x90 [ 34.469588] map_update_elem+0x5c4/0xc90 [ 34.473630] __x64_sys_bpf+0x32d/0x510 [ 34.477498] ? bpf_prog_get+0x20/0x20 [ 34.481283] ? do_syscall_64+0x9a/0x820 [ 34.485239] do_syscall_64+0x1b9/0x820 [ 34.489106] ? finish_task_switch+0x1d3/0x870 [ 34.493584] ? syscall_return_slowpath+0x5e0/0x5e0 [ 34.498499] ? syscall_return_slowpath+0x31d/0x5e0 [ 34.503412] ? entry_SYSCALL_64_after_hwframe+0x59/0xbe [ 34.508760] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 34.513585] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 34.518753] RIP: 0033:0x445689 [ 34.521920] 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 [ 34.541069] RSP: 002b:00007f74b7ff0db8 EFLAGS: 00000297 ORIG_RAX: 0000000000000141 [ 34.548774] RAX: ffffffffffffffda RBX: 00000000006dac24 RCX: 0000000000445689 [ 34.556027] RDX: 0000000000000020 RSI: 0000000020000180 RDI: 0000000000000002 [ 34.563275] RBP: 00000000006dac20 R08: 0000000000000000 R09: 0000000000000000 [ 34.570529] R10: 0000000000000000 R11: 0000000000000297 R12: 0000000000000000 [ 34.577778] R13: 00007fffb6b8317f R14: 00007f74b7ff19c0 R15: 0000000000000005 [ 34.585032] Modules linked in: [ 34.588205] Dumping ftrace buffer: [ 34.591723] (ftrace buffer empty) [ 34.595421] ---[ end trace 94971ff7437052c8 ]--- [ 34.600162] RIP: 0010:__lock_acquire+0x245/0x5020 [ 34.604980] 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 [ 34.624111] RSP: 0018:ffff8801d9237340 EFLAGS: 00010002 [ 34.629453] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000000 [ 34.636703] RDX: 0000000000000049 RSI: 0000000000000000 RDI: ffffffff88f1b060 [ 34.643954] RBP: ffff8801d92376d0 R08: 0000000000000001 R09: 0000000000000000 [ 34.651207] R10: ffffed003b5e46d6 R11: 0000000000000001 R12: 0000000000000000 [ 34.658457] R13: 0000000000000248 R14: ffff8801d8d84680 R15: 0000000000000000 [ 34.665709] FS: 00007f74b7ff1700(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 [ 34.673915] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 34.679875] CR2: 00007ffc90f1fce0 CR3: 00000001d92c4000 CR4: 00000000001406e0 [ 34.687127] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 34.694391] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 34.701641] Kernel panic - not syncing: Fatal exception in interrupt [ 34.708579] Dumping ftrace buffer: [ 34.712109] (ftrace buffer empty) [ 34.715793] Kernel Offset: disabled [ 34.719403] Rebooting in 86400 seconds..