Warning: Permanently added '10.128.0.50' (ECDSA) to the list of known hosts. [ 996.680554] random: sshd: uninitialized urandom read (32 bytes read) [ 996.802761] kauditd_printk_skb: 10 callbacks suppressed [ 996.802770] audit: type=1400 audit(1562126547.919:36): avc: denied { map } for pid=6844 comm="syz-executor236" path="/root/syz-executor236202171" dev="sda1" ino=1426 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:user_home_t:s0 tclass=file permissive=1 [ 997.540227] IPVS: ftp: loaded support on port[0] = 21 [ 998.600196] IPVS: ftp: loaded support on port[0] = 21 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 999.640408] IPVS: ftp: loaded support on port[0] = 21 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 1000.560604] IPVS: ftp: loaded support on port[0] = 21 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 1001.480336] IPVS: ftp: loaded support on port[0] = 21 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 1002.420458] IPVS: ftp: loaded support on port[0] = 21 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 1004.681522] ================================================================== [ 1004.689409] BUG: KASAN: use-after-free in xfrm6_tunnel_destroy+0x52e/0x5d0 [ 1004.696440] Read of size 8 at addr ffff888097f39778 by task kworker/0:2/2677 [ 1004.703789] [ 1004.705408] CPU: 0 PID: 2677 Comm: kworker/0:2 Not tainted 4.14.131 #25 [ 1004.712150] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 1004.721723] Workqueue: events xfrm_state_gc_task [ 1004.726702] Call Trace: [ 1004.729738] dump_stack+0x138/0x19c [ 1004.733481] ? xfrm6_tunnel_destroy+0x52e/0x5d0 [ 1004.738184] print_address_description.cold+0x7c/0x1dc [ 1004.743455] ? xfrm6_tunnel_destroy+0x52e/0x5d0 [ 1004.748349] kasan_report.cold+0xa9/0x2af [ 1004.752628] __asan_report_load8_noabort+0x14/0x20 [ 1004.757559] xfrm6_tunnel_destroy+0x52e/0x5d0 [ 1004.762267] xfrm_state_gc_task+0x3ea/0x650 [ 1004.766574] ? xfrm_state_unregister_afinfo+0x1a0/0x1a0 [ 1004.772104] ? rcu_lockdep_current_cpu_online+0xf2/0x140 [ 1004.777560] process_one_work+0x863/0x1600 [ 1004.781843] ? pwq_dec_nr_in_flight+0x2e0/0x2e0 [ 1004.786776] worker_thread+0x7f3/0x1050 [ 1004.790831] kthread+0x319/0x430 [ 1004.794237] ? process_one_work+0x1600/0x1600 [ 1004.798821] ? kthread_create_on_node+0xd0/0xd0 [ 1004.803545] ret_from_fork+0x24/0x30 [ 1004.807331] [ 1004.808942] Allocated by task 6851: [ 1004.812553] save_stack_trace+0x16/0x20 [ 1004.816515] save_stack+0x45/0xd0 [ 1004.819954] kasan_kmalloc+0xce/0xf0 [ 1004.823770] __kmalloc+0x15d/0x7a0 [ 1004.827364] ops_init+0xeb/0x3d0 [ 1004.830756] setup_net+0x237/0x530 [ 1004.834283] copy_net_ns+0x19f/0x440 [ 1004.838177] create_new_namespaces+0x37b/0x720 [ 1004.842755] unshare_nsproxy_namespaces+0xab/0x1e0 [ 1004.847672] SyS_unshare+0x2f3/0x7e0 [ 1004.851444] do_syscall_64+0x1e8/0x640 [ 1004.855378] entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 1004.860551] [ 1004.862165] Freed by task 22: [ 1004.865255] save_stack_trace+0x16/0x20 [ 1004.869211] save_stack+0x45/0xd0 [ 1004.872647] kasan_slab_free+0x75/0xc0 [ 1004.876594] kfree+0xcc/0x270 [ 1004.879744] ops_free_list.part.0+0x1f6/0x320 [ 1004.884377] cleanup_net+0x458/0x880 [ 1004.888119] process_one_work+0x863/0x1600 [ 1004.892663] worker_thread+0x5d9/0x1050 [ 1004.896657] kthread+0x319/0x430 [ 1004.900090] ret_from_fork+0x24/0x30 [ 1004.903787] [ 1004.905399] The buggy address belongs to the object at ffff888097f396c0 [ 1004.905399] which belongs to the cache kmalloc-8192 of size 8192 [ 1004.918557] The buggy address is located 184 bytes inside of [ 1004.918557] 8192-byte region [ffff888097f396c0, ffff888097f3b6c0) [ 1004.931263] The buggy address belongs to the page: [ 1004.936182] page:ffffea00025fce00 count:1 mapcount:0 mapping:ffff888097f396c0 index:0x0 compound_mapcount: 0 [ 1004.946133] flags: 0x1fffc0000008100(slab|head) [ 1004.950954] raw: 01fffc0000008100 ffff888097f396c0 0000000000000000 0000000100000001 [ 1004.958837] raw: ffffea0002457820 ffffea00025d5820 ffff8880aa802080 0000000000000000 [ 1004.966874] page dumped because: kasan: bad access detected [ 1004.972568] [ 1004.974182] Memory state around the buggy address: [ 1004.979239] ffff888097f39600: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 1004.986846] ffff888097f39680: fc fc fc fc fc fc fc fc fb fb fb fb fb fb fb fb [ 1004.994510] >ffff888097f39700: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 1005.002095] ^ [ 1005.009578] ffff888097f39780: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 1005.017074] ffff888097f39800: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 1005.024637] ================================================================== [ 1005.032551] Disabling lock debugging due to kernel taint [ 1005.038032] Kernel panic - not syncing: panic_on_warn set ... [ 1005.038032] [ 1005.045399] CPU: 0 PID: 2677 Comm: kworker/0:2 Tainted: G B 4.14.131 #25 [ 1005.053366] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 1005.062782] Workqueue: events xfrm_state_gc_task [ 1005.067676] Call Trace: [ 1005.070362] dump_stack+0x138/0x19c [ 1005.073991] ? xfrm6_tunnel_destroy+0x52e/0x5d0 [ 1005.078643] panic+0x1f2/0x426 [ 1005.081826] ? add_taint.cold+0x16/0x16 [ 1005.085795] kasan_end_report+0x47/0x4f [ 1005.089763] kasan_report.cold+0x130/0x2af [ 1005.094350] __asan_report_load8_noabort+0x14/0x20 [ 1005.099449] xfrm6_tunnel_destroy+0x52e/0x5d0 [ 1005.103932] xfrm_state_gc_task+0x3ea/0x650 [ 1005.108808] ? xfrm_state_unregister_afinfo+0x1a0/0x1a0 [ 1005.114161] ? rcu_lockdep_current_cpu_online+0xf2/0x140 [ 1005.119594] process_one_work+0x863/0x1600 [ 1005.123822] ? pwq_dec_nr_in_flight+0x2e0/0x2e0 [ 1005.128474] worker_thread+0x7f3/0x1050 [ 1005.132437] kthread+0x319/0x430 [ 1005.135952] ? process_one_work+0x1600/0x1600 [ 1005.140434] ? kthread_create_on_node+0xd0/0xd0 [ 1005.145239] ret_from_fork+0x24/0x30 [ 1005.150721] Kernel Offset: disabled [ 1005.154498] Rebooting in 86400 seconds..