[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 18.997046] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 23.228707] random: sshd: uninitialized urandom read (32 bytes read) [ 23.766385] random: sshd: uninitialized urandom read (32 bytes read) [ 24.614383] random: sshd: uninitialized urandom read (32 bytes read) [ 24.769141] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.10.42' (ECDSA) to the list of known hosts. [ 30.308279] random: sshd: uninitialized urandom read (32 bytes read) executing program [ 30.399717] BUG: unable to handle kernel paging request at ffffebe000000008 [ 30.406832] PGD 0 P4D 0 [ 30.409497] Oops: 0000 [#1] SMP KASAN [ 30.413276] CPU: 0 PID: 4503 Comm: syz-executor290 Not tainted 4.18.0-rc4+ #146 [ 30.420695] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 30.430041] RIP: 0010:kfree+0xa0/0x260 [ 30.433901] Code: 82 cb 01 00 00 48 ba 00 00 00 80 ff 77 00 00 48 01 c2 48 89 df 48 b8 00 00 00 00 00 ea ff ff 48 c1 ea 0c 48 c1 e2 06 48 01 c2 <48> 8b 42 08 a8 01 48 8d 48 ff 48 0f 45 d1 4c 8b 6a 18 49 63 75 74 [ 30.453032] RSP: 0018:ffff8801cc167520 EFLAGS: 00010086 [ 30.458380] RAX: ffffea0000000000 RBX: 0000000000000286 RCX: 0000000000000000 [ 30.465629] RDX: ffffebe000000000 RSI: 0000000000000000 RDI: 0000000000000286 [ 30.472882] RBP: ffff8801cc167540 R08: ffffed003b5c46d7 R09: ffffed003b5c46d6 [ 30.480127] R10: ffffed003b5c46d6 R11: ffff8801dae236b3 R12: 0000000000000286 [ 30.487374] R13: ffffffff8766e6c3 R14: ffff8801cc167690 R15: ffff8801b3568380 [ 30.494628] FS: 00000000023fe880(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 [ 30.502828] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 30.508686] CR2: ffffebe000000008 CR3: 00000001b3aa3000 CR4: 00000000001406f0 [ 30.515939] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 30.523184] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 30.530426] Call Trace: [ 30.533007] p9_client_create+0xf43/0x16c9 [ 30.537231] ? p9_client_read+0xc60/0xc60 [ 30.541357] ? find_held_lock+0x36/0x1c0 [ 30.545399] ? __lockdep_init_map+0x105/0x590 [ 30.549875] ? kasan_check_write+0x14/0x20 [ 30.554087] ? __init_rwsem+0x1cc/0x2a0 [ 30.558043] ? do_raw_write_unlock.cold.8+0x49/0x49 [ 30.563043] ? rcu_read_lock_sched_held+0x108/0x120 [ 30.568041] ? __kmalloc_track_caller+0x5f5/0x760 [ 30.572858] ? save_stack+0xa9/0xd0 [ 30.576459] ? save_stack+0x43/0xd0 [ 30.580063] ? kasan_kmalloc+0xc4/0xe0 [ 30.583927] ? kmem_cache_alloc_trace+0x152/0x780 [ 30.588748] ? memcpy+0x45/0x50 [ 30.592011] v9fs_session_init+0x21a/0x1a80 [ 30.596320] ? lock_release+0x4dc/0xa30 [ 30.600275] ? v9fs_show_options+0x7e0/0x7e0 [ 30.604665] ? kasan_check_read+0x11/0x20 [ 30.608790] ? rcu_is_watching+0x8c/0x150 [ 30.612913] ? rcu_pm_notify+0xc0/0xc0 [ 30.616778] ? v9fs_mount+0x61/0x900 [ 30.620468] ? rcu_read_lock_sched_held+0x108/0x120 [ 30.625461] ? kmem_cache_alloc_trace+0x616/0x780 [ 30.630283] ? __sanitizer_cov_trace_const_cmp2+0x18/0x20 [ 30.635816] v9fs_mount+0x7c/0x900 [ 30.639334] mount_fs+0xae/0x328 [ 30.642679] vfs_kern_mount.part.34+0xdc/0x4e0 [ 30.647240] ? may_umount+0xb0/0xb0 [ 30.650843] ? _raw_read_unlock+0x22/0x30 [ 30.654967] ? __get_fs_type+0x97/0xc0 [ 30.658833] do_mount+0x581/0x30e0 [ 30.662350] ? copy_mount_string+0x40/0x40 [ 30.666564] ? copy_mount_options+0x5f/0x380 [ 30.670954] ? rcu_read_lock_sched_held+0x108/0x120 [ 30.675960] ? kmem_cache_alloc_trace+0x616/0x780 [ 30.680781] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 30.686303] ? _copy_from_user+0xdf/0x150 [ 30.690431] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 30.695943] ? copy_mount_options+0x285/0x380 [ 30.700414] ksys_mount+0x12d/0x140 [ 30.704029] __x64_sys_mount+0xbe/0x150 [ 30.707984] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 30.712979] do_syscall_64+0x1b9/0x820 [ 30.716844] ? syscall_return_slowpath+0x5e0/0x5e0 [ 30.721748] ? syscall_return_slowpath+0x31d/0x5e0 [ 30.726666] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 30.732180] ? retint_user+0x18/0x18 [ 30.735872] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 30.740701] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 30.745864] RIP: 0033:0x440149 [ 30.749031] Code: 18 89 d0 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 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 fb 13 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 30.768151] RSP: 002b:00007ffecae75248 EFLAGS: 00000206 ORIG_RAX: 00000000000000a5 [ 30.775839] RAX: ffffffffffffffda RBX: 0030656c69662f2e RCX: 0000000000440149 [ 30.783085] RDX: 0000000020000340 RSI: 00000000200000c0 RDI: 0000000000000000 [ 30.790332] RBP: 00000000006ca018 R08: 00000000200001c0 R09: 00000000004002c8 [ 30.797577] R10: 0000000000000000 R11: 0000000000000206 R12: 00000000004019d0 [ 30.804820] R13: 0000000000401a60 R14: 0000000000000000 R15: 0000000000000000 [ 30.812070] Modules linked in: [ 30.815241] Dumping ftrace buffer: [ 30.818753] (ftrace buffer empty) [ 30.822437] CR2: ffffebe000000008 [ 30.825869] ---[ end trace 303a79f3ab12a0f0 ]--- [ 30.830617] RIP: 0010:kfree+0xa0/0x260 [ 30.834483] Code: 82 cb 01 00 00 48 ba 00 00 00 80 ff 77 00 00 48 01 c2 48 89 df 48 b8 00 00 00 00 00 ea ff ff 48 c1 ea 0c 48 c1 e2 06 48 01 c2 <48> 8b 42 08 a8 01 48 8d 48 ff 48 0f 45 d1 4c 8b 6a 18 49 63 75 74 [ 30.853598] RSP: 0018:ffff8801cc167520 EFLAGS: 00010086 [ 30.858944] RAX: ffffea0000000000 RBX: 0000000000000286 RCX: 0000000000000000 [ 30.866191] RDX: ffffebe000000000 RSI: 0000000000000000 RDI: 0000000000000286 [ 30.873436] RBP: ffff8801cc167540 R08: ffffed003b5c46d7 R09: ffffed003b5c46d6 [ 30.880684] R10: ffffed003b5c46d6 R11: ffff8801dae236b3 R12: 0000000000000286 [ 30.887931] R13: ffffffff8766e6c3 R14: ffff8801cc167690 R15: ffff8801b3568380 [ 30.895183] FS: 00000000023fe880(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 [ 30.903388] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 30.909251] CR2: ffffebe000000008 CR3: 00000001b3aa3000 CR4: 00000000001406f0 [ 30.916500] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 30.923745] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 30.930989] Kernel panic - not syncing: Fatal exception [ 30.936768] Dumping ftrace buffer: [ 30.940281] (ftrace buffer empty) [ 30.943966] Kernel Offset: disabled [ 30.947575] Rebooting in 86400 seconds..