[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 20.312786] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 24.628817] random: sshd: uninitialized urandom read (32 bytes read) [ 24.915936] random: sshd: uninitialized urandom read (32 bytes read) [ 25.747716] random: sshd: uninitialized urandom read (32 bytes read) [ 25.899193] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.15.196' (ECDSA) to the list of known hosts. [ 31.346883] 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 [ 34.130624] list_del corruption, ffff8801b0900a68->next is LIST_POISON1 (dead000000000100) [ 34.139468] ------------[ cut here ]------------ [ 34.144237] kernel BUG at lib/list_debug.c:47! [ 34.148891] invalid opcode: 0000 [#1] SMP KASAN [ 34.153562] CPU: 0 PID: 27 Comm: kworker/0:2 Not tainted 4.18.0-rc4+ #43 [ 34.160475] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 34.169849] Workqueue: events p9_poll_workfn [ 34.174362] RIP: 0010:__list_del_entry_valid.cold.1+0x26/0x58 executing program [ 34.180246] Code: 02 fe 0f 0b 4c 89 e2 48 89 de 48 c7 c7 20 66 1a 88 e8 4a 6e 02 fe 0f 0b 4c 89 ea 48 89 de 48 c7 c7 c0 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 [ 34.199385] RSP: 0018:ffff8801d946f318 EFLAGS: 00010282 [ 34.204771] RAX: 000000000000004e RBX: ffff8801b0900a68 RCX: 0000000000000000 [ 34.212050] RDX: 0000000000000000 RSI: ffffffff81631821 RDI: 0000000000000001 [ 34.219409] RBP: ffff8801d946f330 R08: ffff8801d9434700 R09: ffffed003b5c4fc0 executing program [ 34.226681] R10: ffffed003b5c4fc0 R11: ffff8801dae27e07 R12: dead000000000200 [ 34.233956] R13: dead000000000100 R14: ffff8801d946f388 R15: 1ffff1003b28de9e [ 34.241224] FS: 0000000000000000(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 [ 34.249442] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 34.255309] CR2: 00000000f7f83db0 CR3: 0000000008e6a000 CR4: 00000000001406f0 [ 34.262576] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 34.269856] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 34.277119] Call Trace: executing program [ 34.279708] p9_conn_cancel+0x8d6/0xd30 [ 34.283669] ? p9_fd_cancelled+0x2f0/0x2f0 [ 34.287922] ? lock_downgrade+0x8f0/0x8f0 [ 34.292078] ? mark_held_locks+0xc9/0x160 [ 34.296214] ? do_raw_spin_trylock+0x1c0/0x1c0 [ 34.300781] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 34.306306] ? pipe_poll+0x2bd/0x340 [ 34.310373] ? generic_pipe_buf_confirm+0x10/0x10 [ 34.315234] p9_poll_workfn+0x4b2/0x6d0 [ 34.319399] ? p9_read_work+0x1060/0x1060 [ 34.323545] ? graph_lock+0x170/0x170 [ 34.327333] ? lock_acquire+0x1e4/0x540 executing program [ 34.331304] ? process_one_work+0xb9b/0x1ba0 [ 34.335715] ? kasan_check_read+0x11/0x20 [ 34.339873] ? __lock_is_held+0xb5/0x140 [ 34.343957] process_one_work+0xc73/0x1ba0 [ 34.348221] ? trace_hardirqs_on+0x10/0x10 [ 34.352468] ? pwq_dec_nr_in_flight+0x4a0/0x4a0 [ 34.357131] ? lock_repin_lock+0x430/0x430 [ 34.361380] ? __sched_text_start+0x8/0x8 [ 34.365515] ? lock_downgrade+0x8f0/0x8f0 [ 34.369653] ? graph_lock+0x170/0x170 [ 34.373447] ? graph_lock+0x170/0x170 [ 34.377242] ? lock_acquire+0x1e4/0x540 executing program [ 34.381222] ? worker_thread+0x3dc/0x13c0 [ 34.385373] ? lock_downgrade+0x8f0/0x8f0 [ 34.389517] ? lock_release+0xa30/0xa30 [ 34.393487] ? kasan_check_read+0x11/0x20 [ 34.397637] ? do_raw_spin_unlock+0xa7/0x2f0 [ 34.402047] ? do_raw_spin_trylock+0x1c0/0x1c0 [ 34.406635] ? kasan_check_write+0x14/0x20 [ 34.410858] ? do_raw_spin_lock+0xc1/0x200 [ 34.415096] worker_thread+0x189/0x13c0 [ 34.419074] ? process_one_work+0x1ba0/0x1ba0 [ 34.423569] ? graph_lock+0x170/0x170 [ 34.427371] ? graph_lock+0x170/0x170 [ 34.431188] ? find_held_lock+0x36/0x1c0 [ 34.435242] ? find_held_lock+0x36/0x1c0 [ 34.439310] ? lock_downgrade+0x8f0/0x8f0 [ 34.443483] ? kasan_check_read+0x11/0x20 [ 34.447622] ? do_raw_spin_unlock+0xa7/0x2f0 [ 34.452041] ? _raw_spin_unlock_irqrestore+0x74/0xc0 [ 34.457152] ? __kthread_parkme+0x58/0x1b0 [ 34.461394] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 34.466499] ? trace_hardirqs_on+0xd/0x10 [ 34.470640] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 34.476190] ? __kthread_parkme+0x106/0x1b0 executing program [ 34.480507] kthread+0x345/0x410 [ 34.483869] ? process_one_work+0x1ba0/0x1ba0 [ 34.488354] ? kthread_bind+0x40/0x40 [ 34.492161] ret_from_fork+0x3a/0x50 [ 34.495879] Modules linked in: [ 34.499068] Dumping ftrace buffer: [ 34.502590] (ftrace buffer empty) [ 34.506337] ---[ end trace d16685add5d4cc74 ]--- [ 34.511128] RIP: 0010:__list_del_entry_valid.cold.1+0x26/0x58 executing program [ 34.517094] Code: 02 fe 0f 0b 4c 89 e2 48 89 de 48 c7 c7 20 66 1a 88 e8 4a 6e 02 fe 0f 0b 4c 89 ea 48 89 de 48 c7 c7 c0 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 [ 34.536383] RSP: 0018:ffff8801d946f318 EFLAGS: 00010282 [ 34.541784] RAX: 000000000000004e RBX: ffff8801b0900a68 RCX: 0000000000000000 [ 34.549259] RDX: 0000000000000000 RSI: ffffffff81631821 RDI: 0000000000000001 [ 34.556570] RBP: ffff8801d946f330 R08: ffff8801d9434700 R09: ffffed003b5c4fc0 [ 34.563860] R10: ffffed003b5c4fc0 R11: ffff8801dae27e07 R12: dead000000000200 [ 34.571152] R13: dead000000000100 R14: ffff8801d946f388 R15: 1ffff1003b28de9e executing program [ 34.578559] FS: 0000000000000000(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 [ 34.586827] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 34.592753] CR2: 00000000f7f83db0 CR3: 0000000008e6a000 CR4: 00000000001406f0 [ 34.600153] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 34.607563] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 34.614873] Kernel panic - not syncing: Fatal exception [ 34.620860] Dumping ftrace buffer: [ 34.624385] (ftrace buffer empty) [ 34.628076] Kernel Offset: disabled [ 34.631695] Rebooting in 86400 seconds..