[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 15.413041] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 22.941544] random: sshd: uninitialized urandom read (32 bytes read) [ 23.304031] random: sshd: uninitialized urandom read (32 bytes read) [ 24.011382] random: sshd: uninitialized urandom read (32 bytes read) [ 31.578734] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.10.25' (ECDSA) to the list of known hosts. [ 37.054227] random: sshd: uninitialized urandom read (32 bytes read) 2018/07/05 00:36:03 parsed 1 programs [ 38.666995] random: cc1: uninitialized urandom read (8 bytes read) 2018/07/05 00:36:06 executed programs: 0 [ 39.862015] IPVS: Creating netns size=2536 id=1 [ 39.912395] IPVS: Creating netns size=2536 id=2 [ 39.935827] IPVS: Creating netns size=2536 id=3 [ 39.968816] IPVS: Creating netns size=2536 id=4 [ 39.999280] IPVS: Creating netns size=2536 id=5 [ 40.041625] IPVS: Creating netns size=2536 id=6 [ 40.062659] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bridge: link is not ready [ 40.087173] IPVS: Creating netns size=2536 id=7 [ 40.090611] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bridge: link is not ready [ 40.152474] IPVS: Creating netns size=2536 id=8 [ 40.242119] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bond: link is not ready [ 40.270534] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bond: link is not ready [ 40.292331] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bridge: link is not ready [ 40.326286] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bridge: link is not ready [ 40.342332] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bridge: link is not ready [ 40.373729] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bridge: link is not ready [ 40.425058] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bridge: link is not ready [ 40.451170] IPv6: ADDRCONF(NETDEV_UP): veth0_to_team: link is not ready [ 40.467649] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bridge: link is not ready [ 40.479832] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bond: link is not ready [ 40.489581] IPv6: ADDRCONF(NETDEV_UP): veth1_to_team: link is not ready [ 40.507151] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bridge: link is not ready [ 40.516269] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bond: link is not ready [ 40.529760] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bridge: link is not ready [ 40.539908] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bond: link is not ready [ 40.546815] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 40.577147] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bond: link is not ready [ 40.600039] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 40.656361] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bridge: link is not ready [ 40.673315] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bond: link is not ready [ 40.689678] IPv6: ADDRCONF(NETDEV_UP): veth0_to_team: link is not ready [ 40.704435] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bond: link is not ready [ 40.712600] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bridge: link is not ready [ 40.721349] IPv6: ADDRCONF(NETDEV_UP): veth1_to_team: link is not ready [ 40.730762] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bridge: link is not ready [ 40.741697] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bond: link is not ready [ 40.754760] IPv6: ADDRCONF(NETDEV_UP): veth0_to_team: link is not ready [ 40.766378] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bridge: link is not ready [ 40.776537] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 40.787463] IPv6: ADDRCONF(NETDEV_UP): veth1_to_team: link is not ready [ 40.794842] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bridge: link is not ready [ 40.801930] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bond: link is not ready [ 40.817871] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 40.826934] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 40.839351] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bridge: link is not ready [ 40.848752] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 40.898841] IPv6: ADDRCONF(NETDEV_UP): veth0_to_team: link is not ready [ 40.909254] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bond: link is not ready [ 40.930668] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bond: link is not ready [ 40.948549] IPv6: ADDRCONF(NETDEV_UP): veth1_to_team: link is not ready [ 40.957680] IPv6: ADDRCONF(NETDEV_UP): veth0_to_team: link is not ready [ 40.975829] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 40.985604] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bond: link is not ready [ 40.994460] IPv6: ADDRCONF(NETDEV_UP): veth1_to_team: link is not ready [ 41.007559] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_1: link is not ready [ 41.015837] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bond: link is not ready [ 41.023942] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bond: link is not ready [ 41.033974] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 41.041433] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 41.053380] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_0: link is not ready [ 41.060791] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bond: link is not ready [ 41.076380] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 41.085643] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 41.104790] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_1: link is not ready [ 41.112576] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 41.121415] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 41.129504] IPv6: ADDRCONF(NETDEV_UP): veth0_to_team: link is not ready [ 41.164909] IPv6: ADDRCONF(NETDEV_UP): veth1_to_team: link is not ready [ 41.179916] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_0: link is not ready [ 41.197019] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 41.205352] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 41.214779] IPv6: ADDRCONF(NETDEV_UP): veth0_to_team: link is not ready [ 41.224364] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_1: link is not ready [ 41.234502] IPv6: ADDRCONF(NETDEV_UP): veth1_to_team: link is not ready [ 41.243227] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 41.251961] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 41.266423] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_0: link is not ready [ 41.276540] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 41.286766] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 41.299850] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_1: link is not ready [ 41.309926] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 41.321687] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 41.329714] IPv6: ADDRCONF(NETDEV_UP): veth0_to_team: link is not ready [ 41.344513] IPv6: ADDRCONF(NETDEV_UP): veth1_to_team: link is not ready [ 41.383064] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_0: link is not ready [ 41.396771] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 41.404681] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 41.418616] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_1: link is not ready [ 41.435746] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 41.445523] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 43.342719] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 43.485587] IPv6: ADDRCONF(NETDEV_UP): veth1: link is not ready [ 43.491728] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 43.498773] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 43.530146] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 43.640199] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 43.694195] IPv6: ADDRCONF(NETDEV_UP): veth1: link is not ready [ 43.700344] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 43.715878] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 43.779512] IPv6: ADDRCONF(NETDEV_UP): veth1: link is not ready [ 43.791184] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 43.798100] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 43.808729] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 43.851731] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 43.925136] IPv6: ADDRCONF(NETDEV_UP): veth1: link is not ready [ 43.936338] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 43.944335] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 43.992835] IPv6: ADDRCONF(NETDEV_UP): veth1: link is not ready [ 44.005639] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 44.012493] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 44.048700] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 44.119554] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 44.186623] IPv6: ADDRCONF(NETDEV_UP): veth1: link is not ready [ 44.193083] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 44.199805] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 44.248103] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 44.281037] IPv6: ADDRCONF(NETDEV_UP): veth1: link is not ready [ 44.289954] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 44.297266] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 44.387782] IPv6: ADDRCONF(NETDEV_UP): veth1: link is not ready [ 44.402895] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 44.409772] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready 2018/07/05 00:36:11 executed programs: 10 [ 45.574818] ================================================================== [ 45.582216] BUG: KASAN: use-after-free in __lock_acquire+0x319b/0x4070 [ 45.588869] Read of size 8 at addr ffff8801c801bc20 by task syz-executor0/6863 [ 45.596230] [ 45.596238] CPU: 0 PID: 6863 Comm: syz-executor0 Not tainted 4.9.111-g03c70fe #9 [ 45.596241] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 45.596255] ffff8801c52bf610 ffffffff81eb2729 ffffea0007200600 ffff8801c801bc20 [ 45.596263] 0000000000000000 ffff8801c801bc20 0000000000000000 ffff8801c52bf648 [ 45.596269] ffffffff81567b59 ffff8801c801bc20 0000000000000008 0000000000000000 [ 45.596271] Call Trace: [ 45.596284] [] dump_stack+0xc1/0x128 [ 45.596294] [] print_address_description+0x6c/0x234 [ 45.596300] [] kasan_report.cold.6+0x242/0x2fe [ 45.596310] [] ? __lock_acquire+0x319b/0x4070 [ 45.596317] [] __asan_report_load8_noabort+0x14/0x20 [ 45.596324] [] __lock_acquire+0x319b/0x4070 [ 45.596331] [] ? dput.part.29+0x5cf/0x7b0 [ 45.596337] [] ? dput+0x1f/0x30 [ 45.596344] [] ? __fput+0x42f/0x700 [ 45.596350] [] ? ____fput+0x15/0x20 [ 45.596359] [] ? task_work_run+0x10c/0x180 [ 45.596366] [] ? __lock_acquire+0x654/0x4070 [ 45.596374] [] ? debug_check_no_locks_freed+0x210/0x210 [ 45.596381] [] ? trace_hardirqs_on_caller+0x38b/0x590 [ 45.596388] [] ? debug_check_no_locks_freed+0x210/0x210 [ 45.596394] [] ? quarantine_put+0xd9/0x180 [ 45.596401] [] ? trace_hardirqs_on_caller+0x38b/0x590 [ 45.596409] [] ? check_preemption_disabled+0x3b/0x170 [ 45.596416] [] lock_acquire+0x130/0x3e0 [ 45.596423] [] ? lock_sock_nested+0x43/0x120 [ 45.596431] [] ? sock_release+0x1c0/0x1c0 [ 45.596440] [] _raw_spin_lock_bh+0x3a/0x50 [ 45.596446] [] ? lock_sock_nested+0x43/0x120 [ 45.596452] [] lock_sock_nested+0x43/0x120 [ 45.596459] [] pppol2tp_release+0x50/0x2e0 [ 45.596466] [] sock_release+0x96/0x1c0 [ 45.596472] [] sock_close+0x16/0x20 [ 45.596479] [] __fput+0x263/0x700 [ 45.596485] [] ____fput+0x15/0x20 [ 45.596492] [] task_work_run+0x10c/0x180 [ 45.596500] [] do_exit+0x9e1/0x27c0 [ 45.596507] [] ? debug_check_no_locks_freed+0x210/0x210 [ 45.596514] [] ? save_stack_trace+0x16/0x20 [ 45.596519] [] ? save_stack+0x43/0xd0 [ 45.596525] [] ? dentry_free+0xd5/0x150 [ 45.596532] [] ? release_task.part.19+0x1210/0x1210 [ 45.596540] [] ? exit_to_usermode_loop+0xfc/0x120 [ 45.596547] [] ? recalc_sigpending+0x72/0x90 [ 45.596554] [] do_group_exit+0x111/0x340 [ 45.596561] [] get_signal+0x4cf/0x1450 [ 45.596568] [] ? check_preemption_disabled+0x3b/0x170 [ 45.596576] [] do_signal+0x87/0x19f0 [ 45.596583] [] ? check_preemption_disabled+0x3b/0x170 [ 45.596590] [] ? mntput_no_expire+0xca/0x6b0 [ 45.596597] [] ? setup_sigcontext+0x7d0/0x7d0 [ 45.596603] [] ? sock_release+0x1c0/0x1c0 [ 45.596610] [] ? mntput_no_expire+0xf6/0x6b0 [ 45.596616] [] ? mnt_get_count+0x140/0x140 [ 45.596622] [] ? dput.part.29+0x16d/0x7b0 [ 45.596628] [] ? dput.part.29+0x2a/0x7b0 [ 45.596640] [] ? sock_release+0x1c0/0x1c0 [ 45.596646] [] ? mntput+0x66/0x90 [ 45.596653] [] ? exit_to_usermode_loop+0xac/0x120 [ 45.596660] [] exit_to_usermode_loop+0xe1/0x120 [ 45.596666] [] do_fast_syscall_32+0x5c3/0x870 [ 45.596672] [] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 45.596679] [] entry_SYSENTER_compat+0x90/0xa2 [ 45.596682] [ 45.596685] Allocated by task 6845: [ 45.596690] save_stack_trace+0x16/0x20 [ 45.596695] save_stack+0x43/0xd0 [ 45.596699] kasan_kmalloc+0xc7/0xe0 [ 45.596705] __kmalloc+0x11d/0x300 [ 45.596710] sk_prot_alloc+0x17e/0x290 [ 45.596714] sk_alloc+0x3a/0x3a0 [ 45.596719] pppol2tp_create+0x33/0x1f0 [ 45.596727] pppox_create+0xf6/0x210 [ 45.596732] __sock_create+0x2ef/0x5f0 [ 45.596737] SyS_socket+0xf0/0x1b0 [ 45.596742] do_fast_syscall_32+0x2f7/0x870 [ 45.596747] entry_SYSENTER_compat+0x90/0xa2 [ 45.596749] [ 45.596751] Freed by task 6863: [ 45.596756] save_stack_trace+0x16/0x20 [ 45.596760] save_stack+0x43/0xd0 [ 45.596765] kasan_slab_free+0x72/0xc0 [ 45.596770] kfree+0xfb/0x310 [ 45.596775] __sk_destruct+0x46f/0x590 [ 45.596780] sk_destruct+0x63/0x80 [ 45.596784] __sk_free+0x4f/0x220 [ 45.596789] sk_free+0x2b/0x40 [ 45.596794] pppol2tp_session_sock_put+0x5a/0x70 [ 45.596799] l2tp_tunnel_closeall+0x268/0x350 [ 45.596804] l2tp_udp_encap_destroy+0x87/0xe0 [ 45.596809] udpv6_destroy_sock+0xb1/0xd0 [ 45.596814] sk_common_release+0x6d/0x300 [ 45.596819] udp_lib_close+0x15/0x20 [ 45.596825] inet_release+0xff/0x1d0 [ 45.596833] inet6_release+0x50/0x70 [ 45.596838] sock_release+0x96/0x1c0 [ 45.596843] sock_close+0x16/0x20 [ 45.596848] __fput+0x263/0x700 [ 45.596853] ____fput+0x15/0x20 [ 45.596858] task_work_run+0x10c/0x180 [ 45.596863] exit_to_usermode_loop+0xfc/0x120 [ 45.596868] do_fast_syscall_32+0x5c3/0x870 [ 45.596874] entry_SYSENTER_compat+0x90/0xa2 [ 45.596875] [ 45.596879] The buggy address belongs to the object at ffff8801c801bb80 [ 45.596879] which belongs to the cache kmalloc-2048 of size 2048 [ 45.596884] The buggy address is located 160 bytes inside of [ 45.596884] 2048-byte region [ffff8801c801bb80, ffff8801c801c380) [ 45.596886] The buggy address belongs to the page: [ 45.596894] page:ffffea0007200600 count:1 mapcount:0 mapping: (null) index:0xffff8801c801e600 compound_mapcount: 0 [ 45.596898] flags: 0x8000000000004080(slab|head) [ 45.596901] page dumped because: kasan: bad access detected [ 45.596902] [ 45.596904] Memory state around the buggy address: [ 45.596909] ffff8801c801bb00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 45.596914] ffff8801c801bb80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 45.596919] >ffff8801c801bc00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 45.596921] ^ [ 45.596925] ffff8801c801bc80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 45.596930] ffff8801c801bd00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 45.596932] ================================================================== [ 45.596934] Disabling lock debugging due to kernel taint [ 45.596937] Kernel panic - not syncing: panic_on_warn set ... [ 45.596937] [ 45.596943] CPU: 0 PID: 6863 Comm: syz-executor0 Tainted: G B 4.9.111-g03c70fe #9 [ 45.596946] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 45.596956] ffff8801c52bf570 ffffffff81eb2729 ffffffff843c71a7 00000000ffffffff [ 45.596964] 0000000000000000 0000000000000000 0000000000000000 ffff8801c52bf630 [ 45.596972] ffffffff814219f5 0000000041b58ab3 ffffffff843ba8c0 ffffffff81421836 [ 45.596974] Call Trace: [ 45.596980] [] dump_stack+0xc1/0x128 [ 45.596987] [] panic+0x1bf/0x3bc [ 45.596993] [] ? add_taint.cold.6+0x16/0x16 [ 45.596999] [] ? kasan_end_report+0x32/0x4f [ 45.597005] [] kasan_end_report+0x47/0x4f [ 45.597011] [] kasan_report.cold.6+0x76/0x2fe [ 45.597018] [] ? __lock_acquire+0x319b/0x4070 [ 45.597025] [] __asan_report_load8_noabort+0x14/0x20 [ 45.597032] [] __lock_acquire+0x319b/0x4070 [ 45.597038] [] ? dput.part.29+0x5cf/0x7b0 [ 45.597044] [] ? dput+0x1f/0x30 [ 45.597050] [] ? __fput+0x42f/0x700 [ 45.597056] [] ? ____fput+0x15/0x20 [ 45.597063] [] ? task_work_run+0x10c/0x180 [ 45.597070] [] ? __lock_acquire+0x654/0x4070 [ 45.597078] [] ? debug_check_no_locks_freed+0x210/0x210 [ 45.597085] [] ? trace_hardirqs_on_caller+0x38b/0x590 [ 45.597092] [] ? debug_check_no_locks_freed+0x210/0x210 [ 45.597098] [] ? quarantine_put+0xd9/0x180 [ 45.597105] [] ? trace_hardirqs_on_caller+0x38b/0x590 [ 45.597112] [] ? check_preemption_disabled+0x3b/0x170 [ 45.597119] [] lock_acquire+0x130/0x3e0 [ 45.597125] [] ? lock_sock_nested+0x43/0x120 [ 45.597132] [] ? sock_release+0x1c0/0x1c0 [ 45.597139] [] _raw_spin_lock_bh+0x3a/0x50 [ 45.597145] [] ? lock_sock_nested+0x43/0x120 [ 45.597151] [] lock_sock_nested+0x43/0x120 [ 45.597157] [] pppol2tp_release+0x50/0x2e0 [ 45.597164] [] sock_release+0x96/0x1c0 [ 45.597170] [] sock_close+0x16/0x20 [ 45.597177] [] __fput+0x263/0x700 [ 45.597183] [] ____fput+0x15/0x20 [ 45.597190] [] task_work_run+0x10c/0x180 [ 45.597197] [] do_exit+0x9e1/0x27c0 [ 45.597204] [] ? debug_check_no_locks_freed+0x210/0x210 [ 45.597210] [] ? save_stack_trace+0x16/0x20 [ 45.597215] [] ? save_stack+0x43/0xd0 [ 45.597221] [] ? dentry_free+0xd5/0x150 [ 45.597228] [] ? release_task.part.19+0x1210/0x1210 [ 45.597234] [] ? exit_to_usermode_loop+0xfc/0x120 [ 45.597241] [] ? recalc_sigpending+0x72/0x90 [ 45.597248] [] do_group_exit+0x111/0x340 [ 45.597255] [] get_signal+0x4cf/0x1450 [ 45.597262] [] ? check_preemption_disabled+0x3b/0x170 [ 45.597269] [] do_signal+0x87/0x19f0 [ 45.597276] [] ? check_preemption_disabled+0x3b/0x170 [ 45.597282] [] ? mntput_no_expire+0xca/0x6b0 [ 45.597289] [] ? setup_sigcontext+0x7d0/0x7d0 [ 45.597296] [] ? sock_release+0x1c0/0x1c0 [ 45.597302] [] ? mntput_no_expire+0xf6/0x6b0 [ 45.597308] [] ? mnt_get_count+0x140/0x140 [ 45.597314] [] ? dput.part.29+0x16d/0x7b0 [ 45.597320] [] ? dput.part.29+0x2a/0x7b0 [ 45.597326] [] ? sock_release+0x1c0/0x1c0 [ 45.597332] [] ? mntput+0x66/0x90 [ 45.597339] [] ? exit_to_usermode_loop+0xac/0x120 [ 45.597345] [] exit_to_usermode_loop+0xe1/0x120 [ 45.597352] [] do_fast_syscall_32+0x5c3/0x870 [ 45.597358] [] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 45.597365] [] entry_SYSENTER_compat+0x90/0xa2 [ 45.598311] Dumping ftrace buffer: [ 45.598314] (ftrace buffer empty) [ 45.598316] Kernel Offset: disabled [ 46.660845] Rebooting in 86400 seconds..