[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 23.049508] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 26.523409] random: sshd: uninitialized urandom read (32 bytes read) [ 26.830762] random: sshd: uninitialized urandom read (32 bytes read) [ 27.396002] random: sshd: uninitialized urandom read (32 bytes read) [ 27.578465] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.0.25' (ECDSA) to the list of known hosts. [ 33.371884] random: sshd: uninitialized urandom read (32 bytes read) executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 33.559514] hrtimer: interrupt took 55440 ns 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 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 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 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 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 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 36.828704] syz-executor839 (5320) used greatest stack depth: 16392 bytes left 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 [ 52.596821] ================================================================== [ 52.604335] BUG: KASAN: use-after-free in sctp_transport_get_next+0x11c/0x140 [ 52.611609] Read of size 8 at addr ffff8801c89aeaa0 by task syz-executor839/9429 [ 52.619132] [ 52.620767] CPU: 0 PID: 9429 Comm: syz-executor839 Not tainted 4.18.0-next-20180824+ #47 [ 52.628988] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 52.638344] Call Trace: [ 52.640933] dump_stack+0x1c9/0x2b4 [ 52.644561] ? dump_stack_print_info.cold.2+0x52/0x52 [ 52.649748] ? printk+0xa7/0xcf [ 52.653037] ? kmsg_dump_rewind_nolock+0xe4/0xe4 [ 52.657796] ? sctp_transport_get_next+0x11c/0x140 [ 52.662731] print_address_description+0x6c/0x20b [ 52.667590] ? sctp_transport_get_next+0x11c/0x140 [ 52.672531] kasan_report.cold.7+0x242/0x30d [ 52.676947] __asan_report_load8_noabort+0x14/0x20 [ 52.681877] sctp_transport_get_next+0x11c/0x140 [ 52.686776] sctp_for_each_transport+0x152/0x370 [ 52.691529] ? sctp_ep_dump+0xaa0/0xaa0 [ 52.695521] ? sctp_v6_copy_ip_options.cold.17+0x28/0x28 [ 52.700986] ? sctp_transport_get_next+0x140/0x140 [ 52.705928] ? sctp_for_each_endpoint+0x130/0x1c0 [ 52.710784] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 52.715802] ? sctp_for_each_endpoint+0x165/0x1c0 [ 52.720685] sctp_diag_dump+0x3a7/0x620 [ 52.724666] ? inet_diag_msg_sctpladdrs_fill+0x360/0x360 [ 52.730123] ? skb_scrub_packet+0x490/0x490 [ 52.734515] ? mutex_lock_nested+0x16/0x20 [ 52.738767] __inet_diag_dump+0xa8/0x140 [ 52.742834] inet_diag_dump+0x9b/0x110 [ 52.746727] netlink_dump+0x519/0xd50 [ 52.750553] ? netlink_broadcast+0x50/0x50 [ 52.754801] __netlink_dump_start+0x4f1/0x6f0 [ 52.759309] ? kasan_check_read+0x11/0x20 [ 52.763468] inet_diag_handler_cmd+0x2ce/0x3f0 [ 52.768074] ? inet_diag_rcv_msg_compat+0x3f0/0x3f0 [ 52.773092] ? inet_diag_dump_compat+0x4b0/0x4b0 [ 52.777874] sock_diag_rcv_msg+0x31d/0x410 [ 52.782118] netlink_rcv_skb+0x172/0x440 [ 52.786180] ? sock_diag_bind+0x80/0x80 [ 52.790157] ? netlink_ack+0xbe0/0xbe0 [ 52.794046] ? rcu_cleanup_dead_rnp+0x200/0x200 [ 52.798740] sock_diag_rcv+0x2a/0x40 [ 52.802465] netlink_unicast+0x5a0/0x760 [ 52.806548] ? netlink_attachskb+0x9a0/0x9a0 [ 52.810963] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 52.816525] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 52.821553] netlink_sendmsg+0xa18/0xfc0 [ 52.825654] ? netlink_unicast+0x760/0x760 [ 52.829903] ? security_socket_sendmsg+0x94/0xc0 [ 52.834658] ? netlink_unicast+0x760/0x760 [ 52.838903] sock_sendmsg+0xd5/0x120 [ 52.842619] sock_write_iter+0x362/0x5c0 [ 52.846708] ? sock_sendmsg+0x120/0x120 [ 52.850705] do_iter_readv_writev+0x8b0/0xa80 [ 52.855231] ? vfs_dedupe_file_range+0x670/0x670 [ 52.860004] ? rw_copy_check_uvector+0x30d/0x3e0 [ 52.864784] ? rw_verify_area+0x118/0x360 [ 52.868941] do_iter_write+0x185/0x5f0 [ 52.872831] ? dup_iter+0x270/0x270 [ 52.876481] vfs_writev+0x1f1/0x360 [ 52.880124] ? __fget_light+0x2f7/0x440 [ 52.884102] ? vfs_iter_write+0xb0/0xb0 [ 52.888081] ? __do_sys_perf_event_open+0x7bb/0x2f30 [ 52.893193] ? get_unused_fd_flags+0x1a0/0x1a0 [ 52.897793] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 52.902560] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 52.908099] ? __fdget_pos+0xde/0x200 [ 52.911903] ? __bpf_trace_preemptirq_template+0x30/0x30 [ 52.917356] ? __fdget_raw+0x20/0x20 [ 52.921074] ? trace_hardirqs_off+0xb8/0x2b0 [ 52.925501] ? do_syscall_64+0x6be/0x820 [ 52.929575] do_writev+0x11a/0x310 [ 52.933121] ? vfs_writev+0x360/0x360 [ 52.936933] __x64_sys_writev+0x75/0xb0 [ 52.940913] ? do_syscall_64+0xca/0x820 [ 52.944893] do_syscall_64+0x1b9/0x820 [ 52.948790] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 52.954158] ? syscall_return_slowpath+0x5e0/0x5e0 [ 52.959088] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 52.963933] ? trace_hardirqs_on_caller+0x2b0/0x2b0 [ 52.968954] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 52.973974] ? prepare_exit_to_usermode+0x291/0x3b0 [ 52.979001] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 52.983854] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 52.989044] RIP: 0033:0x446629 [ 52.992242] Code: e8 0c e8 ff ff 48 83 c4 18 c3 0f 1f 80 00 00 00 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 7b 08 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 53.011146] RSP: 002b:00007fa987a9cda8 EFLAGS: 00000246 ORIG_RAX: 0000000000000014 [ 53.018862] RAX: ffffffffffffffda RBX: 00000000006dbc48 RCX: 0000000000446629 [ 53.026134] RDX: 0000000000000001 RSI: 0000000020000000 RDI: 0000000000000005 [ 53.033402] RBP: 00000000006dbc40 R08: 000000000000001c R09: 0000000000000000 [ 53.040673] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006dbc4c [ 53.047942] R13: 0100000000000000 R14: 00007fa987a9d9c0 R15: 0000000000000000 [ 53.055225] [ 53.056853] Allocated by task 9428: [ 53.060487] save_stack+0x43/0xd0 [ 53.063951] kasan_kmalloc+0xc4/0xe0 [ 53.067666] kmem_cache_alloc_trace+0x152/0x730 [ 53.072349] sctp_association_new+0x127/0x2290 [ 53.076936] sctp_unpack_cookie+0x7b4/0x1160 [ 53.081344] sctp_sf_do_5_1D_ce+0x451/0x14c0 [ 53.085762] sctp_do_sm+0x1c1/0x71e0 [ 53.089476] sctp_endpoint_bh_rcv+0x465/0x960 [ 53.093993] sctp_inq_push+0x272/0x340 [ 53.097879] sctp_rcv+0x2cb2/0x3ab0 [ 53.101517] sctp6_rcv+0x15/0x30 [ 53.104897] ip6_input_finish+0x407/0x1a40 [ 53.109134] ip6_input+0xe9/0x600 [ 53.112592] ip6_rcv_finish+0x17a/0x330 [ 53.116568] ipv6_rcv+0x11e/0x650 [ 53.120029] __netif_receive_skb_one_core+0x14d/0x200 [ 53.125219] __netif_receive_skb+0x2c/0x1e0 [ 53.129547] process_backlog+0x219/0x760 [ 53.133608] net_rx_action+0x799/0x1900 [ 53.137587] __do_softirq+0x2eb/0xa74 [ 53.141376] [ 53.143002] Freed by task 9419: [ 53.146285] save_stack+0x43/0xd0 [ 53.149738] __kasan_slab_free+0x11a/0x170 [ 53.153981] kasan_slab_free+0xe/0x10 [ 53.157786] kfree+0xd9/0x210 [ 53.160894] sctp_association_put+0x264/0x350 [ 53.165392] sctp_association_free+0x6c9/0x972 [ 53.169975] sctp_do_sm+0x4a5c/0x71e0 [ 53.173782] sctp_primitive_ABORT+0xa0/0xd0 [ 53.178105] sctp_close+0x279/0xa80 [ 53.181735] inet_release+0x104/0x1f0 [ 53.185542] inet6_release+0x50/0x70 [ 53.189256] __sock_release+0xd7/0x250 [ 53.193142] sock_close+0x19/0x20 [ 53.196600] __fput+0x376/0x8a0 [ 53.199878] ____fput+0x15/0x20 [ 53.203156] task_work_run+0x1e8/0x2a0 [ 53.207046] exit_to_usermode_loop+0x318/0x380 [ 53.211631] do_syscall_64+0x6be/0x820 [ 53.215527] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 53.220711] [ 53.222340] The buggy address belongs to the object at ffff8801c89aea80 [ 53.222340] which belongs to the cache kmalloc-4096 of size 4096 [ 53.235173] The buggy address is located 32 bytes inside of [ 53.235173] 4096-byte region [ffff8801c89aea80, ffff8801c89afa80) [ 53.247045] The buggy address belongs to the page: [ 53.251973] page:ffffea0007226b80 count:1 mapcount:0 mapping:ffff8801dac00dc0 index:0x0 compound_mapcount: 0 [ 53.261947] flags: 0x2fffc0000008100(slab|head) [ 53.266629] raw: 02fffc0000008100 ffffea000722eb88 ffffea0007220f08 ffff8801dac00dc0 [ 53.274523] raw: 0000000000000000 ffff8801c89aea80 0000000100000001 0000000000000000 [ 53.282395] page dumped because: kasan: bad access detected [ 53.288093] [ 53.289714] Memory state around the buggy address: [ 53.294643] ffff8801c89ae980: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 53.302001] ffff8801c89aea00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 53.309360] >ffff8801c89aea80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 53.316712] ^ [ 53.321120] ffff8801c89aeb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 53.328478] ffff8801c89aeb80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 53.335839] ================================================================== [ 53.343191] Disabling lock debugging due to kernel taint [ 53.349087] Kernel panic - not syncing: panic_on_warn set ... [ 53.349087] [ 53.356465] CPU: 0 PID: 9429 Comm: syz-executor839 Tainted: G B 4.18.0-next-20180824+ #47 [ 53.366099] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 53.375463] Call Trace: [ 53.378072] dump_stack+0x1c9/0x2b4 [ 53.381690] ? dump_stack_print_info.cold.2+0x52/0x52 [ 53.386873] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 53.391616] panic+0x238/0x4e7 [ 53.394794] ? add_taint.cold.5+0x16/0x16 [ 53.398942] ? trace_hardirqs_on+0xb4/0x2c0 [ 53.403269] ? trace_hardirqs_on+0x9a/0x2c0 [ 53.407599] ? sctp_transport_get_next+0x11c/0x140 [ 53.412527] kasan_end_report+0x47/0x4f [ 53.416509] kasan_report.cold.7+0x76/0x30d [ 53.420842] __asan_report_load8_noabort+0x14/0x20 [ 53.425775] sctp_transport_get_next+0x11c/0x140 [ 53.430524] sctp_for_each_transport+0x152/0x370 [ 53.435272] ? sctp_ep_dump+0xaa0/0xaa0 [ 53.439257] ? sctp_v6_copy_ip_options.cold.17+0x28/0x28 [ 53.444694] ? sctp_transport_get_next+0x140/0x140 [ 53.449620] ? sctp_for_each_endpoint+0x130/0x1c0 [ 53.454466] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 53.459483] ? sctp_for_each_endpoint+0x165/0x1c0 [ 53.464354] sctp_diag_dump+0x3a7/0x620 [ 53.468354] ? inet_diag_msg_sctpladdrs_fill+0x360/0x360 [ 53.473805] ? skb_scrub_packet+0x490/0x490 [ 53.478133] ? mutex_lock_nested+0x16/0x20 [ 53.482372] __inet_diag_dump+0xa8/0x140 [ 53.486433] inet_diag_dump+0x9b/0x110 [ 53.490322] netlink_dump+0x519/0xd50 [ 53.494123] ? netlink_broadcast+0x50/0x50 [ 53.498372] __netlink_dump_start+0x4f1/0x6f0 [ 53.502868] ? kasan_check_read+0x11/0x20 [ 53.507016] inet_diag_handler_cmd+0x2ce/0x3f0 [ 53.511597] ? inet_diag_rcv_msg_compat+0x3f0/0x3f0 [ 53.516614] ? inet_diag_dump_compat+0x4b0/0x4b0 [ 53.521378] sock_diag_rcv_msg+0x31d/0x410 [ 53.525617] netlink_rcv_skb+0x172/0x440 [ 53.529694] ? sock_diag_bind+0x80/0x80 [ 53.533673] ? netlink_ack+0xbe0/0xbe0 [ 53.537561] ? rcu_cleanup_dead_rnp+0x200/0x200 [ 53.542235] sock_diag_rcv+0x2a/0x40 [ 53.545951] netlink_unicast+0x5a0/0x760 [ 53.550014] ? netlink_attachskb+0x9a0/0x9a0 [ 53.554425] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 53.559961] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 53.564983] netlink_sendmsg+0xa18/0xfc0 [ 53.569045] ? netlink_unicast+0x760/0x760 [ 53.573283] ? security_socket_sendmsg+0x94/0xc0 [ 53.578035] ? netlink_unicast+0x760/0x760 [ 53.582270] sock_sendmsg+0xd5/0x120 [ 53.585988] sock_write_iter+0x362/0x5c0 [ 53.590048] ? sock_sendmsg+0x120/0x120 [ 53.594033] do_iter_readv_writev+0x8b0/0xa80 [ 53.598533] ? vfs_dedupe_file_range+0x670/0x670 [ 53.603289] ? rw_copy_check_uvector+0x30d/0x3e0 [ 53.608045] ? rw_verify_area+0x118/0x360 [ 53.612195] do_iter_write+0x185/0x5f0 [ 53.616086] ? dup_iter+0x270/0x270 [ 53.619719] vfs_writev+0x1f1/0x360 [ 53.623344] ? __fget_light+0x2f7/0x440 [ 53.627317] ? vfs_iter_write+0xb0/0xb0 [ 53.631290] ? __do_sys_perf_event_open+0x7bb/0x2f30 [ 53.636395] ? get_unused_fd_flags+0x1a0/0x1a0 [ 53.640981] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 53.645744] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 53.651291] ? __fdget_pos+0xde/0x200 [ 53.655090] ? __bpf_trace_preemptirq_template+0x30/0x30 [ 53.660537] ? __fdget_raw+0x20/0x20 [ 53.664247] ? trace_hardirqs_off+0xb8/0x2b0 [ 53.668674] ? do_syscall_64+0x6be/0x820 [ 53.672741] do_writev+0x11a/0x310 [ 53.676300] ? vfs_writev+0x360/0x360 [ 53.680106] __x64_sys_writev+0x75/0xb0 [ 53.684080] ? do_syscall_64+0xca/0x820 [ 53.688055] do_syscall_64+0x1b9/0x820 [ 53.691943] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 53.697312] ? syscall_return_slowpath+0x5e0/0x5e0 [ 53.702238] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 53.707081] ? trace_hardirqs_on_caller+0x2b0/0x2b0 [ 53.712099] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 53.717213] ? prepare_exit_to_usermode+0x291/0x3b0 [ 53.722233] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 53.727086] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 53.732275] RIP: 0033:0x446629 [ 53.735468] Code: e8 0c e8 ff ff 48 83 c4 18 c3 0f 1f 80 00 00 00 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 7b 08 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 53.754375] RSP: 002b:00007fa987a9cda8 EFLAGS: 00000246 ORIG_RAX: 0000000000000014 [ 53.762080] RAX: ffffffffffffffda RBX: 00000000006dbc48 RCX: 0000000000446629 [ 53.769343] RDX: 0000000000000001 RSI: 0000000020000000 RDI: 0000000000000005 [ 53.776607] RBP: 00000000006dbc40 R08: 000000000000001c R09: 0000000000000000 [ 53.783876] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006dbc4c [ 53.791140] R13: 0100000000000000 R14: 00007fa987a9d9c0 R15: 0000000000000000 [ 53.798724] Dumping ftrace buffer: [ 53.802258] (ftrace buffer empty) [ 53.805951] Kernel Offset: disabled [ 53.809559] Rebooting in 86400 seconds..