[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 21.349766] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 24.863701] random: sshd: uninitialized urandom read (32 bytes read) [ 25.323853] random: sshd: uninitialized urandom read (32 bytes read) [ 26.127636] random: sshd: uninitialized urandom read (32 bytes read) [ 118.687924] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.0.19' (ECDSA) to the list of known hosts. [ 124.275243] 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 [ 124.482566] kasan: CONFIG_KASAN_INLINE enabled [ 124.487186] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 124.494547] general protection fault: 0000 [#1] SMP KASAN [ 124.500069] CPU: 1 PID: 4586 Comm: syz-executor884 Not tainted 4.18.0-rc3+ #130 [ 124.507507] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 124.516862] RIP: 0010:__lock_acquire+0x245/0x5020 [ 124.521683] 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 66 e7 89 0f 84 42 ff [ 124.540788] RSP: 0018:ffff8801d9107340 EFLAGS: 00010002 [ 124.546152] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000000 [ 124.553410] RDX: 0000000000000049 RSI: 0000000000000000 RDI: ffffffff88f1b060 [ 124.560676] RBP: ffff8801d91076d0 R08: 0000000000000001 R09: 0000000000000000 [ 124.567950] R10: ffffed003b5e46d6 R11: 0000000000000001 R12: 0000000000000000 [ 124.575211] R13: 0000000000000248 R14: ffff8801d8c1e6c0 R15: 0000000000000000 [ 124.582475] FS: 00007f128061c700(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 [ 124.591558] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 124.597426] CR2: 00007fff989fbd30 CR3: 00000001d8ea7000 CR4: 00000000001406e0 [ 124.604817] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 124.612090] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 124.619350] Call Trace: [ 124.621965] ? print_usage_bug+0xc0/0xc0 [ 124.626016] ? trace_hardirqs_on+0x10/0x10 [ 124.630236] ? __lock_acquire+0x7fc/0x5020 [ 124.634453] ? lock_downgrade+0x8f0/0x8f0 [ 124.638587] ? trace_hardirqs_on+0x10/0x10 [ 124.642808] ? is_bpf_text_address+0xd7/0x170 [ 124.647289] ? kernel_text_address+0x79/0xf0 [ 124.651684] ? __kernel_text_address+0xd/0x40 [ 124.656167] ? unwind_get_return_address+0x61/0xa0 [ 124.661091] ? __save_stack_trace+0x8d/0xf0 [ 124.665422] ? save_stack+0xa9/0xd0 [ 124.669040] lock_acquire+0x1e4/0x540 [ 124.672853] ? smap_list_hash_remove+0xa3/0x470 [ 124.677508] ? lock_release+0xa30/0xa30 [ 124.681481] ? graph_lock+0x170/0x170 [ 124.685451] ? print_usage_bug+0xc0/0xc0 [ 124.689497] ? find_held_lock+0x36/0x1c0 [ 124.693544] _raw_spin_lock_bh+0x31/0x40 [ 124.697590] ? smap_list_hash_remove+0xa3/0x470 [ 124.702249] smap_list_hash_remove+0xa3/0x470 [ 124.706738] ? psock_map_pop.isra.26+0x3b0/0x3b0 [ 124.711497] ? __lock_is_held+0xb5/0x140 [ 124.715548] sock_hash_ctx_update_elem.isra.27+0x1140/0x1690 [ 124.721362] ? sock_map_free+0x530/0x530 [ 124.725410] ? rcu_is_watching+0x8c/0x150 [ 124.729542] ? rcu_report_qs_rnp+0x7a0/0x7a0 [ 124.733941] ? __fget+0x414/0x670 [ 124.737380] ? expand_files.part.8+0x9c0/0x9c0 [ 124.741967] ? find_held_lock+0x36/0x1c0 [ 124.746020] sock_hash_update_elem+0x157/0x2f0 [ 124.750588] ? bpf_sock_hash_update+0x90/0x90 [ 124.755067] ? kasan_check_read+0x11/0x20 [ 124.759197] ? rcu_is_watching+0x8c/0x150 [ 124.763330] ? rcu_report_qs_rnp+0x7a0/0x7a0 [ 124.767745] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 124.773270] ? bpf_sock_hash_update+0x90/0x90 [ 124.777753] map_update_elem+0x5c4/0xc90 [ 124.781826] __x64_sys_bpf+0x32d/0x510 [ 124.785700] ? bpf_prog_get+0x20/0x20 [ 124.789514] ? kasan_check_read+0x11/0x20 [ 124.793654] ? _raw_spin_unlock_irq+0x27/0x70 [ 124.798151] ? do_syscall_64+0x9a/0x820 [ 124.802142] do_syscall_64+0x1b9/0x820 [ 124.806023] ? syscall_return_slowpath+0x5e0/0x5e0 [ 124.810939] ? syscall_return_slowpath+0x31d/0x5e0 [ 124.815875] ? entry_SYSCALL_64_after_hwframe+0x59/0xbe [ 124.821240] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 124.826075] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 124.831254] RIP: 0033:0x445d19 [ 124.834422] 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 [ 124.853524] RSP: 002b:00007f128061bce8 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 [ 124.861221] RAX: ffffffffffffffda RBX: 00000000006dac3c RCX: 0000000000445d19 [ 124.868478] RDX: 0000000000000020 RSI: 0000000020000180 RDI: 0000000000000002 [ 124.875731] RBP: 00000000006dac38 R08: 0000000000000000 R09: 0000000000000000 [ 124.882991] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 [ 124.890249] R13: 00007fff01a4661f R14: 00007f128061c9c0 R15: 0000000000000005 [ 124.897517] Modules linked in: [ 124.900703] Dumping ftrace buffer: [ 124.904233] (ftrace buffer empty) [ 124.907962] ---[ end trace 85dde6e7595029fe ]--- [ 124.912778] RIP: 0010:__lock_acquire+0x245/0x5020 [ 124.917609] 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 66 e7 89 0f 84 42 ff [ 124.937712] RSP: 0018:ffff8801d9107340 EFLAGS: 00010002 [ 124.943076] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000000 [ 124.950330] RDX: 0000000000000049 RSI: 0000000000000000 RDI: ffffffff88f1b060 [ 124.957584] RBP: ffff8801d91076d0 R08: 0000000000000001 R09: 0000000000000000 [ 124.964847] R10: ffffed003b5e46d6 R11: 0000000000000001 R12: 0000000000000000 [ 124.972112] R13: 0000000000000248 R14: ffff8801d8c1e6c0 R15: 0000000000000000 [ 124.979382] FS: 00007f128061c700(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 [ 124.987598] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 124.993473] CR2: 00007fff989fbd30 CR3: 00000001d8ea7000 CR4: 00000000001406e0 [ 125.000751] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 125.008297] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 125.016352] Kernel panic - not syncing: Fatal exception in interrupt [ 125.023278] Dumping ftrace buffer: [ 125.026828] (ftrace buffer empty) [ 125.030527] Kernel Offset: disabled [ 125.034143] Rebooting in 86400 seconds..