[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 19.114836] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 23.538976] random: sshd: uninitialized urandom read (32 bytes read) [ 24.072232] random: sshd: uninitialized urandom read (32 bytes read) [ 24.942489] random: sshd: uninitialized urandom read (32 bytes read) [ 25.097195] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.10.3' (ECDSA) to the list of known hosts. [ 30.732811] random: sshd: uninitialized urandom read (32 bytes read) executing program [ 30.821759] BUG: unable to handle kernel paging request at ffffebe000000008 [ 30.828866] PGD 0 P4D 0 [ 30.831521] Oops: 0000 [#1] SMP KASAN [ 30.835298] CPU: 1 PID: 4512 Comm: syz-executor380 Not tainted 4.18.0-rc4+ #141 [ 30.842718] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 30.852058] RIP: 0010:kfree+0xa0/0x260 [ 30.855914] 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 [ 30.875047] RSP: 0018:ffff8801b50c7520 EFLAGS: 00010086 [ 30.880387] RAX: ffffea0000000000 RBX: 0000000000000286 RCX: 0000000000000000 [ 30.887635] RDX: ffffebe000000000 RSI: 0000000000000000 RDI: 0000000000000286 [ 30.894879] RBP: ffff8801b50c7540 R08: ffffed003b5e46d7 R09: ffffed003b5e46d6 [ 30.902126] R10: ffffed003b5e46d6 R11: ffff8801daf236b3 R12: 0000000000000286 [ 30.909371] R13: ffffffff8766d6c3 R14: ffff8801b50c7690 R15: ffff8801aefa8380 [ 30.916619] FS: 0000000000feb880(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 [ 30.924819] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 30.930674] CR2: ffffebe000000008 CR3: 00000001ae90c000 CR4: 00000000001406e0 [ 30.937921] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 30.945168] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 30.952411] Call Trace: [ 30.954993] p9_client_create+0xf43/0x16c9 [ 30.959212] ? p9_client_read+0xc60/0xc60 [ 30.963337] ? find_held_lock+0x36/0x1c0 [ 30.967380] ? __lockdep_init_map+0x105/0x590 [ 30.971867] ? kasan_check_write+0x14/0x20 [ 30.976077] ? __init_rwsem+0x1cc/0x2a0 [ 30.980035] ? do_raw_write_unlock.cold.8+0x49/0x49 [ 30.985041] ? rcu_read_lock_sched_held+0x108/0x120 [ 30.990041] ? __kmalloc_track_caller+0x5f5/0x760 [ 30.994874] ? save_stack+0xa9/0xd0 [ 30.998477] ? save_stack+0x43/0xd0 [ 31.002079] ? kasan_kmalloc+0xc4/0xe0 [ 31.005945] ? kmem_cache_alloc_trace+0x152/0x780 [ 31.010764] ? memcpy+0x45/0x50 [ 31.014034] v9fs_session_init+0x21a/0x1a80 [ 31.018336] ? find_held_lock+0x36/0x1c0 [ 31.022376] ? v9fs_show_options+0x7e0/0x7e0 [ 31.026762] ? kasan_check_read+0x11/0x20 [ 31.030885] ? rcu_is_watching+0x8c/0x150 [ 31.035011] ? do_raw_spin_unlock+0xa7/0x2f0 [ 31.039406] ? rcu_pm_notify+0xc0/0xc0 [ 31.043272] ? v9fs_mount+0x61/0x900 [ 31.046962] ? rcu_read_lock_sched_held+0x108/0x120 [ 31.051954] ? kmem_cache_alloc_trace+0x616/0x780 [ 31.056775] v9fs_mount+0x7c/0x900 [ 31.060297] mount_fs+0xae/0x328 [ 31.063642] vfs_kern_mount.part.34+0xdc/0x4e0 [ 31.068206] ? may_umount+0xb0/0xb0 [ 31.071813] ? _raw_read_unlock+0x22/0x30 [ 31.075936] ? __get_fs_type+0x97/0xc0 [ 31.079804] do_mount+0x581/0x30e0 [ 31.083321] ? copy_mount_string+0x40/0x40 [ 31.087547] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 31.092279] ? retint_kernel+0x10/0x10 [ 31.096146] ? copy_mount_options+0x1e3/0x380 [ 31.100617] ? copy_mount_options+0x1f0/0x380 [ 31.105088] ? copy_mount_options+0x1fa/0x380 [ 31.109564] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 31.115077] ? copy_mount_options+0x285/0x380 [ 31.119550] ksys_mount+0x12d/0x140 [ 31.123157] __x64_sys_mount+0xbe/0x150 [ 31.127112] ? trace_hardirqs_on_caller+0x421/0x5c0 [ 31.132106] do_syscall_64+0x1b9/0x820 [ 31.135978] ? syscall_slow_exit_work+0x500/0x500 [ 31.140804] ? syscall_return_slowpath+0x5e0/0x5e0 [ 31.145709] ? syscall_return_slowpath+0x31d/0x5e0 [ 31.150618] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 31.156132] ? retint_user+0x18/0x18 [ 31.159832] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 31.164654] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 31.169821] RIP: 0033:0x440149 [ 31.172984] 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 [ 31.192119] RSP: 002b:00007ffe368e9d08 EFLAGS: 00000202 ORIG_RAX: 00000000000000a5 [ 31.199802] RAX: ffffffffffffffda RBX: 0030656c69662f2e RCX: 0000000000440149 [ 31.207050] RDX: 0000000020000340 RSI: 00000000200000c0 RDI: 0000000000000000 [ 31.214298] RBP: 00000000006ca018 R08: 00000000200001c0 R09: 00000000004002c8 [ 31.221544] R10: 0000000000000000 R11: 0000000000000202 R12: 00000000004019d0 [ 31.228801] R13: 0000000000401a60 R14: 0000000000000000 R15: 0000000000000000 [ 31.236052] Modules linked in: [ 31.239227] Dumping ftrace buffer: [ 31.242739] (ftrace buffer empty) [ 31.246434] CR2: ffffebe000000008 [ 31.249864] ---[ end trace aaac431640cfc5bd ]--- [ 31.254608] RIP: 0010:kfree+0xa0/0x260 [ 31.258465] 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 [ 31.277579] RSP: 0018:ffff8801b50c7520 EFLAGS: 00010086 [ 31.282921] RAX: ffffea0000000000 RBX: 0000000000000286 RCX: 0000000000000000 [ 31.290169] RDX: ffffebe000000000 RSI: 0000000000000000 RDI: 0000000000000286 [ 31.297425] RBP: ffff8801b50c7540 R08: ffffed003b5e46d7 R09: ffffed003b5e46d6 [ 31.304669] R10: ffffed003b5e46d6 R11: ffff8801daf236b3 R12: 0000000000000286 [ 31.311916] R13: ffffffff8766d6c3 R14: ffff8801b50c7690 R15: ffff8801aefa8380 [ 31.319166] FS: 0000000000feb880(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 [ 31.327374] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 31.333230] CR2: ffffebe000000008 CR3: 00000001ae90c000 CR4: 00000000001406e0 [ 31.340476] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 31.347730] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 31.354976] Kernel panic - not syncing: Fatal exception [ 31.360751] Dumping ftrace buffer: [ 31.364273] (ftrace buffer empty) [ 31.367955] Kernel Offset: disabled [ 31.371555] Rebooting in 86400 seconds..