[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 19.950688] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 21.689528] random: sshd: uninitialized urandom read (32 bytes read) [ 22.060453] random: sshd: uninitialized urandom read (32 bytes read) [ 22.988901] random: sshd: uninitialized urandom read (32 bytes read) [ 23.166054] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.15.195' (ECDSA) to the list of known hosts. [ 28.700981] 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 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 31.370793] list_del corruption. prev->next should be ffff8801cf85aa68, but was ffff8801d94473b0 [ 31.380155] ------------[ cut here ]------------ [ 31.384916] kernel BUG at lib/list_debug.c:53! [ 31.389632] invalid opcode: 0000 [#1] SMP KASAN [ 31.394304] CPU: 0 PID: 26 Comm: kworker/0:2 Not tainted 4.18.0-rc4+ #139 [ 31.401216] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 31.410579] Workqueue: events p9_poll_workfn [ 31.414992] RIP: 0010:__list_del_entry_valid.cold.1+0x48/0x58 [ 31.421386] Code: 65 1a 88 e8 36 6e 02 fe 0f 0b 48 89 de 48 c7 c7 e0 66 1a 88 e8 25 6e 02 fe 0f 0b 48 89 de 48 c7 c7 80 66 1a 88 e8 14 6e 02 fe <0f> 0b 90 90 90 90 90 90 90 90 90 90 90 90 90 90 55 48 89 e5 41 57 [ 31.440621] RSP: 0018:ffff8801d9447318 EFLAGS: 00010282 [ 31.445990] RAX: 0000000000000054 RBX: ffff8801cf85aa68 RCX: 0000000000000000 [ 31.453267] RDX: 0000000000000000 RSI: ffffffff81631821 RDI: 0000000000000001 [ 31.460549] RBP: ffff8801d9447330 R08: ffff8801d94366c0 R09: ffffed003b5c4fc0 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 31.467810] R10: ffffed003b5c4fc0 R11: ffff8801dae27e07 R12: ffff8801d94473b0 [ 31.475077] R13: ffff8801d94473b0 R14: ffff8801d9447388 R15: 1ffff1003b288e9e [ 31.482359] FS: 0000000000000000(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 [ 31.490626] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 31.496518] CR2: 00007fffab6e3eb0 CR3: 0000000008e6a000 CR4: 00000000001406f0 [ 31.503800] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 31.511087] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 31.518349] Call Trace: [ 31.520956] p9_conn_cancel+0x8d6/0xd30 [ 31.524957] ? p9_fd_cancelled+0x2f0/0x2f0 [ 31.529207] ? lock_downgrade+0x8f0/0x8f0 [ 31.533385] ? mark_held_locks+0xc9/0x160 [ 31.537533] ? do_raw_spin_trylock+0x1c0/0x1c0 [ 31.542134] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 31.547669] ? pipe_poll+0x2bd/0x340 [ 31.551390] ? generic_pipe_buf_confirm+0x10/0x10 [ 31.556242] p9_poll_workfn+0x4b2/0x6d0 [ 31.560219] ? p9_read_work+0x1060/0x1060 [ 31.564374] ? graph_lock+0x170/0x170 [ 31.568180] ? lock_acquire+0x1e4/0x540 [ 31.572153] ? process_one_work+0xb9b/0x1ba0 [ 31.576551] ? kasan_check_read+0x11/0x20 [ 31.580704] ? __lock_is_held+0xb5/0x140 [ 31.584776] process_one_work+0xc73/0x1ba0 [ 31.589007] ? trace_hardirqs_on+0x10/0x10 [ 31.593428] ? pwq_dec_nr_in_flight+0x4a0/0x4a0 [ 31.598190] ? lock_repin_lock+0x430/0x430 [ 31.602443] ? __sched_text_start+0x8/0x8 [ 31.606620] ? lock_downgrade+0x8f0/0x8f0 [ 31.610756] ? graph_lock+0x170/0x170 [ 31.614592] ? lock_acquire+0x1e4/0x540 [ 31.618571] ? worker_thread+0x3dc/0x13c0 [ 31.622718] ? lock_downgrade+0x8f0/0x8f0 [ 31.626857] ? lock_release+0xa30/0xa30 [ 31.630846] ? kasan_check_read+0x11/0x20 [ 31.634997] ? do_raw_spin_unlock+0xa7/0x2f0 [ 31.639411] ? do_raw_spin_trylock+0x1c0/0x1c0 [ 31.643996] ? kasan_check_write+0x14/0x20 [ 31.648233] ? do_raw_spin_lock+0xc1/0x200 [ 31.652482] worker_thread+0x189/0x13c0 [ 31.656468] ? process_one_work+0x1ba0/0x1ba0 [ 31.660959] ? graph_lock+0x170/0x170 [ 31.664753] ? graph_lock+0x170/0x170 [ 31.668540] ? find_held_lock+0x36/0x1c0 [ 31.672634] ? find_held_lock+0x36/0x1c0 [ 31.676699] ? kasan_check_read+0x11/0x20 [ 31.680844] ? do_raw_spin_unlock+0xa7/0x2f0 [ 31.685256] ? _raw_spin_unlock_irqrestore+0x74/0xc0 [ 31.690354] ? __kthread_parkme+0x58/0x1b0 [ 31.694578] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 31.699587] ? trace_hardirqs_on+0xd/0x10 [ 31.703730] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 31.709891] ? __kthread_parkme+0x106/0x1b0 [ 31.714213] kthread+0x345/0x410 [ 31.717579] ? process_one_work+0x1ba0/0x1ba0 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 31.722073] ? kthread_bind+0x40/0x40 [ 31.725884] ret_from_fork+0x3a/0x50 [ 31.729585] Modules linked in: [ 31.732766] Dumping ftrace buffer: [ 31.736292] (ftrace buffer empty) [ 31.740079] ---[ end trace 2224d20976479699 ]--- [ 31.744880] RIP: 0010:__list_del_entry_valid.cold.1+0x48/0x58 [ 31.750883] Code: 65 1a 88 e8 36 6e 02 fe 0f 0b 48 89 de 48 c7 c7 e0 66 1a 88 e8 25 6e 02 fe 0f 0b 48 89 de 48 c7 c7 80 66 1a 88 e8 14 6e 02 fe <0f> 0b 90 90 90 90 90 90 90 90 90 90 90 90 90 90 55 48 89 e5 41 57 [ 31.770168] RSP: 0018:ffff8801d9447318 EFLAGS: 00010282 [ 31.775570] RAX: 0000000000000054 RBX: ffff8801cf85aa68 RCX: 0000000000000000 [ 31.782869] RDX: 0000000000000000 RSI: ffffffff81631821 RDI: 0000000000000001 [ 31.790170] RBP: ffff8801d9447330 R08: ffff8801d94366c0 R09: ffffed003b5c4fc0 [ 31.797495] R10: ffffed003b5c4fc0 R11: ffff8801dae27e07 R12: ffff8801d94473b0 [ 31.804791] R13: ffff8801d94473b0 R14: ffff8801d9447388 R15: 1ffff1003b288e9e [ 31.812116] FS: 0000000000000000(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 [ 31.820365] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 31.826304] CR2: 00007fffab6e3eb0 CR3: 0000000008e6a000 CR4: 00000000001406f0 [ 31.833696] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 31.841031] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 31.848415] Kernel panic - not syncing: Fatal exception [ 31.854292] Dumping ftrace buffer: [ 31.857828] (ftrace buffer empty) [ 31.861532] Kernel Offset: disabled [ 31.865138] Rebooting in 86400 seconds..