[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 20.162061] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 21.813418] random: sshd: uninitialized urandom read (32 bytes read) [ 22.148242] random: sshd: uninitialized urandom read (32 bytes read) [ 22.988314] random: sshd: uninitialized urandom read (32 bytes read) [ 23.168871] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.0.50' (ECDSA) to the list of known hosts. [ 28.642960] random: sshd: uninitialized urandom read (32 bytes read) 2018/07/10 15:42:00 parsed 1 programs [ 30.565915] random: cc1: uninitialized urandom read (8 bytes read) 2018/07/10 15:42:03 executed programs: 0 [ 31.918962] IPVS: ftp: loaded support on port[0] = 21 [ 32.128193] bridge0: port 1(bridge_slave_0) entered blocking state [ 32.134711] bridge0: port 1(bridge_slave_0) entered disabled state [ 32.142396] device bridge_slave_0 entered promiscuous mode [ 32.159565] bridge0: port 2(bridge_slave_1) entered blocking state [ 32.166111] bridge0: port 2(bridge_slave_1) entered disabled state [ 32.173380] device bridge_slave_1 entered promiscuous mode [ 32.189712] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bridge: link is not ready [ 32.206692] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bridge: link is not ready [ 32.250451] bond0: Enslaving bond_slave_0 as an active interface with an up link [ 32.269711] bond0: Enslaving bond_slave_1 as an active interface with an up link [ 32.335941] IPv6: ADDRCONF(NETDEV_UP): team_slave_0: link is not ready [ 32.343661] team0: Port device team_slave_0 added [ 32.358951] IPv6: ADDRCONF(NETDEV_UP): team_slave_1: link is not ready [ 32.366287] team0: Port device team_slave_1 added [ 32.382891] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 32.403431] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 32.420996] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 32.439699] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 32.568170] bridge0: port 2(bridge_slave_1) entered blocking state [ 32.574697] bridge0: port 2(bridge_slave_1) entered forwarding state [ 32.581802] bridge0: port 1(bridge_slave_0) entered blocking state [ 32.588232] bridge0: port 1(bridge_slave_0) entered forwarding state [ 33.048743] IPv6: ADDRCONF(NETDEV_UP): bond0: link is not ready [ 33.054912] 8021q: adding VLAN 0 to HW filter on device bond0 [ 33.101836] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 33.120069] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 33.156941] IPv6: ADDRCONF(NETDEV_UP): veth1: link is not ready [ 33.163234] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 33.171138] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 33.215585] 8021q: adding VLAN 0 to HW filter on device team0 [ 33.509575] BUG: unable to handle kernel paging request at ffffebe000000008 [ 33.516727] PGD 0 P4D 0 [ 33.519413] Oops: 0000 [#1] SMP KASAN [ 33.523236] CPU: 1 PID: 4800 Comm: syz-executor0 Not tainted 4.18.0-rc4+ #42 [ 33.530421] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 33.539813] RIP: 0010:kfree+0xa0/0x260 [ 33.543697] 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 [ 33.562939] RSP: 0018:ffff8801b190f4e0 EFLAGS: 00010086 [ 33.568305] RAX: ffffea0000000000 RBX: 0000000000000286 RCX: 0000000000000000 [ 33.575579] RDX: ffffebe000000000 RSI: 0000000000000000 RDI: 0000000000000286 [ 33.582846] RBP: ffff8801b190f500 R08: ffffed003b5e46d7 R09: ffffed003b5e46d6 [ 33.590124] R10: ffffed003b5e46d6 R11: ffff8801daf236b3 R12: 0000000000000286 [ 33.597402] R13: ffffffff8766d6c3 R14: ffff8801b190f650 R15: ffff8801b12c1680 [ 33.604709] FS: 0000000000000000(0000) GS:ffff8801daf00000(0063) knlGS:000000000867a900 [ 33.612942] CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 [ 33.618820] CR2: ffffebe000000008 CR3: 00000001c8761000 CR4: 00000000001406e0 [ 33.626100] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 33.633362] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 33.640616] Call Trace: [ 33.643219] p9_client_create+0xf43/0x16c9 [ 33.647481] ? p9_client_read+0xc60/0xc60 [ 33.651633] ? find_held_lock+0x36/0x1c0 [ 33.655723] ? __lockdep_init_map+0x105/0x590 [ 33.660226] ? kasan_check_write+0x14/0x20 [ 33.664476] ? __init_rwsem+0x1cc/0x2a0 [ 33.668488] ? do_raw_write_unlock.cold.8+0x49/0x49 [ 33.673505] ? rcu_read_lock_sched_held+0x108/0x120 [ 33.678538] ? __kmalloc_track_caller+0x5f5/0x760 [ 33.683391] ? save_stack+0xa9/0xd0 [ 33.687027] ? save_stack+0x43/0xd0 [ 33.690659] ? kasan_kmalloc+0xc4/0xe0 [ 33.694551] ? memcpy+0x45/0x50 [ 33.697844] v9fs_session_init+0x21a/0x1a80 [ 33.702177] ? find_held_lock+0x36/0x1c0 [ 33.706265] ? v9fs_show_options+0x7e0/0x7e0 [ 33.710692] ? kasan_check_read+0x11/0x20 [ 33.714837] ? rcu_is_watching+0x8c/0x150 [ 33.719001] ? rcu_pm_notify+0xc0/0xc0 [ 33.722885] ? rcu_pm_notify+0xc0/0xc0 [ 33.726767] ? v9fs_mount+0x61/0x900 [ 33.730476] ? rcu_read_lock_sched_held+0x108/0x120 [ 33.735489] ? kmem_cache_alloc_trace+0x616/0x780 [ 33.740334] ? __sanitizer_cov_trace_const_cmp2+0x18/0x20 [ 33.745873] v9fs_mount+0x7c/0x900 [ 33.749416] mount_fs+0xae/0x328 [ 33.752778] vfs_kern_mount.part.34+0xdc/0x4e0 [ 33.757389] ? may_umount+0xb0/0xb0 [ 33.761028] ? _raw_read_unlock+0x22/0x30 [ 33.765199] ? __get_fs_type+0x97/0xc0 [ 33.769092] do_mount+0x581/0x30e0 [ 33.772629] ? copy_mount_string+0x40/0x40 [ 33.776865] ? copy_mount_options+0x5f/0x380 [ 33.781293] ? rcu_read_lock_sched_held+0x108/0x120 [ 33.786325] ? kmem_cache_alloc_trace+0x616/0x780 [ 33.791180] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 33.796729] ? _copy_from_user+0xdf/0x150 [ 33.800912] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 33.806482] ? copy_mount_options+0x285/0x380 [ 33.810997] __ia32_compat_sys_mount+0x5d5/0x860 [ 33.815781] do_fast_syscall_32+0x34d/0xfb2 [ 33.820136] ? do_int80_syscall_32+0x890/0x890 [ 33.824827] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 33.829586] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 33.835144] ? syscall_return_slowpath+0x31d/0x5e0 [ 33.840081] ? sysret32_from_system_call+0x5/0x46 [ 33.844972] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 33.849842] entry_SYSENTER_compat+0x70/0x7f [ 33.854260] RIP: 0023:0xf7fefcb9 [ 33.857628] 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 [ 33.876811] RSP: 002b:00000000ffb5d84c EFLAGS: 00000286 ORIG_RAX: 0000000000000015 [ 33.884524] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00000000200000c0 [ 33.891812] RDX: 0000000020000340 RSI: 0000000000000000 RDI: 00000000200001c0 [ 33.899077] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 [ 33.906359] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 33.913633] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 33.920903] Modules linked in: [ 33.924100] Dumping ftrace buffer: [ 33.927637] (ftrace buffer empty) [ 33.931343] CR2: ffffebe000000008 [ 33.934816] ---[ end trace e6dfbce566da5dbc ]--- [ 33.939597] RIP: 0010:kfree+0xa0/0x260 [ 33.943487] 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 [ 33.962636] RSP: 0018:ffff8801b190f4e0 EFLAGS: 00010086 [ 33.968003] RAX: ffffea0000000000 RBX: 0000000000000286 RCX: 0000000000000000 [ 33.975311] RDX: ffffebe000000000 RSI: 0000000000000000 RDI: 0000000000000286 [ 33.982585] RBP: ffff8801b190f500 R08: ffffed003b5e46d7 R09: ffffed003b5e46d6 [ 33.989877] R10: ffffed003b5e46d6 R11: ffff8801daf236b3 R12: 0000000000000286 [ 33.997156] R13: ffffffff8766d6c3 R14: ffff8801b190f650 R15: ffff8801b12c1680 [ 34.004448] FS: 0000000000000000(0000) GS:ffff8801daf00000(0063) knlGS:000000000867a900 [ 34.012673] CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 [ 34.018569] CR2: ffffebe000000008 CR3: 00000001c8761000 CR4: 00000000001406e0 [ 34.025858] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 34.033144] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 34.040528] Kernel panic - not syncing: Fatal exception [ 34.046499] Dumping ftrace buffer: [ 34.050044] (ftrace buffer empty) [ 34.053765] Kernel Offset: disabled [ 34.057439] Rebooting in 86400 seconds..