[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 19.253341] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 25.169464] random: sshd: uninitialized urandom read (32 bytes read) [ 25.596651] random: sshd: uninitialized urandom read (32 bytes read) [ 26.419670] random: sshd: uninitialized urandom read (32 bytes read) [ 26.568458] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.15.195' (ECDSA) to the list of known hosts. [ 31.974615] 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 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 38.556415] list_del corruption. prev->next should be ffff8801a45b80e8, but was ffff8801d94673b0 [ 38.565795] ------------[ cut here ]------------ [ 38.570561] kernel BUG at lib/list_debug.c:53! [ 38.575240] invalid opcode: 0000 [#1] SMP KASAN [ 38.580095] CPU: 1 PID: 7364 Comm: syz-executor930 Not tainted 4.18.0-rc4+ #42 [ 38.587451] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 38.596820] RIP: 0010:__list_del_entry_valid.cold.1+0x48/0x58 executing program executing program executing program executing program executing program [ 38.602682] 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 [ 38.623470] RSP: 0018:ffff8801a4577180 EFLAGS: 00010286 [ 38.628846] RAX: 0000000000000054 RBX: ffff8801a45b80e8 RCX: 0000000000000000 [ 38.636108] RDX: 0000000000000000 RSI: ffffffff81631821 RDI: 0000000000000001 [ 38.643376] RBP: ffff8801a4577198 R08: ffff8801b43b8080 R09: ffffed003b5e4fc0 [ 38.650643] R10: ffffed003b5e4fc0 R11: ffff8801daf27e07 R12: ffff8801d94673b0 [ 38.657916] R13: ffff8801d94673b0 R14: ffff8801a45b80e8 R15: ffff8801a45b80f0 [ 38.665183] FS: 0000000000000000(0000) GS:ffff8801daf00000(0063) knlGS:00000000f7f98b40 [ 38.673405] CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 [ 38.679290] CR2: 00000000080d9030 CR3: 00000001acd9f000 CR4: 00000000001406e0 [ 38.686557] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 38.693830] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 38.701186] Call Trace: [ 38.703772] p9_fd_cancel+0x104/0x360 [ 38.707581] ? p9_fd_close+0x5b0/0x5b0 [ 38.711475] ? p9_pollwait+0x83/0x230 [ 38.715276] p9_client_rpc+0xf1f/0x1400 [ 38.719260] ? p9_client_prepare_req.part.8+0xcd0/0xcd0 [ 38.724626] ? __fget+0x414/0x670 [ 38.728089] ? rcu_is_watching+0x61/0x150 [ 38.732247] ? expand_files.part.8+0x9c0/0x9c0 [ 38.736838] ? finish_wait+0x430/0x430 [ 38.740716] ? rcu_read_lock_sched_held+0x108/0x120 [ 38.745725] ? p9_fd_show_options+0x1c0/0x1c0 [ 38.750207] ? lockdep_init_map+0x9/0x10 [ 38.754264] p9_client_create+0xd09/0x16c9 [ 38.758490] ? p9_client_read+0xc60/0xc60 [ 38.762632] ? find_held_lock+0x36/0x1c0 [ 38.766701] ? __lockdep_init_map+0x105/0x590 [ 38.771198] ? kasan_check_write+0x14/0x20 [ 38.775429] ? __init_rwsem+0x1cc/0x2a0 [ 38.779395] ? do_raw_write_unlock.cold.8+0x49/0x49 [ 38.784420] ? rcu_read_lock_sched_held+0x108/0x120 [ 38.789431] ? __kmalloc_track_caller+0x5f5/0x760 [ 38.794276] ? save_stack+0xa9/0xd0 [ 38.797897] ? save_stack+0x43/0xd0 [ 38.801519] ? kasan_kmalloc+0xc4/0xe0 [ 38.805402] ? memcpy+0x45/0x50 [ 38.808678] v9fs_session_init+0x21a/0x1a80 [ 38.812996] ? find_held_lock+0x36/0x1c0 [ 38.817065] ? v9fs_show_options+0x7e0/0x7e0 [ 38.821477] ? kasan_check_read+0x11/0x20 [ 38.825619] ? rcu_is_watching+0x8c/0x150 [ 38.829755] ? rcu_pm_notify+0xc0/0xc0 [ 38.833636] ? rcu_pm_notify+0xc0/0xc0 [ 38.837525] ? v9fs_mount+0x61/0x900 [ 38.841241] ? rcu_read_lock_sched_held+0x108/0x120 [ 38.846253] ? kmem_cache_alloc_trace+0x616/0x780 [ 38.851104] ? __sanitizer_cov_trace_const_cmp2+0x18/0x20 [ 38.856631] v9fs_mount+0x7c/0x900 [ 38.860164] mount_fs+0xae/0x328 [ 38.863525] vfs_kern_mount.part.34+0xdc/0x4e0 [ 38.868110] ? may_umount+0xb0/0xb0 [ 38.871754] ? _raw_read_unlock+0x22/0x30 [ 38.875903] ? __get_fs_type+0x97/0xc0 [ 38.879788] do_mount+0x581/0x30e0 [ 38.883328] ? do_raw_spin_unlock+0xa7/0x2f0 [ 38.887731] ? copy_mount_string+0x40/0x40 [ 38.891973] ? copy_mount_options+0x5f/0x380 [ 38.896379] ? rcu_read_lock_sched_held+0x108/0x120 [ 38.901390] ? kmem_cache_alloc_trace+0x616/0x780 [ 38.906233] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 38.911778] ? _copy_from_user+0xdf/0x150 [ 38.915923] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 38.921454] ? copy_mount_options+0x285/0x380 [ 38.925956] __ia32_compat_sys_mount+0x5d5/0x860 [ 38.930710] do_fast_syscall_32+0x34d/0xfb2 [ 38.935028] ? do_int80_syscall_32+0x890/0x890 [ 38.939611] ? _raw_spin_unlock_irq+0x27/0x70 [ 38.944109] ? finish_task_switch+0x1d3/0x870 [ 38.948611] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 38.954150] ? syscall_return_slowpath+0x31d/0x5e0 [ 38.959098] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 38.964635] ? retint_user+0x18/0x18 [ 38.968342] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 38.973183] entry_SYSENTER_compat+0x70/0x7f [ 38.977597] RIP: 0023:0xf7f9ccb9 [ 38.980953] Code: 55 08 8b 88 64 cd ff ff 8b 98 68 cd ff ff 89 c8 85 d2 74 02 89 0a 5b 5d c3 8b 04 24 c3 8b 1c 24 c3 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 eb 0d 90 90 90 90 90 90 90 90 90 90 90 90 [ 39.000198] RSP: 002b:00000000f7f981ec EFLAGS: 00000286 ORIG_RAX: 0000000000000015 [ 39.007893] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000020000040 [ 39.015154] RDX: 00000000200000c0 RSI: 0000000000200000 RDI: 0000000020000100 [ 39.022421] RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000000 [ 39.029681] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 39.036953] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 39.044227] Modules linked in: [ 39.047422] Dumping ftrace buffer: [ 39.050956] (ftrace buffer empty) [ 39.054712] ---[ end trace 55dfaae620acb67e ]--- [ 39.059497] RIP: 0010:__list_del_entry_valid.cold.1+0x48/0x58 [ 39.065403] 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 [ 39.084685] RSP: 0018:ffff8801a4577180 EFLAGS: 00010286 [ 39.090064] RAX: 0000000000000054 RBX: ffff8801a45b80e8 RCX: 0000000000000000 [ 39.097350] RDX: 0000000000000000 RSI: ffffffff81631821 RDI: 0000000000000001 [ 39.104635] RBP: ffff8801a4577198 R08: ffff8801b43b8080 R09: ffffed003b5e4fc0 [ 39.111942] R10: ffffed003b5e4fc0 R11: ffff8801daf27e07 R12: ffff8801d94673b0 [ 39.119246] R13: ffff8801d94673b0 R14: ffff8801a45b80e8 R15: ffff8801a45b80f0 [ 39.126550] FS: 0000000000000000(0000) GS:ffff8801daf00000(0063) knlGS:00000000f7f98b40 [ 39.134793] CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 [ 39.140687] CR2: 00000000080d9030 CR3: 00000001acd9f000 CR4: 00000000001406e0 [ 39.147983] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 39.155298] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 39.162583] Kernel panic - not syncing: Fatal exception [ 39.168511] Dumping ftrace buffer: [ 39.172040] (ftrace buffer empty) [ 39.175732] Kernel Offset: disabled [ 39.179338] Rebooting in 86400 seconds..