[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 25.536275] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 30.488238] random: sshd: uninitialized urandom read (32 bytes read) [ 30.800530] random: sshd: uninitialized urandom read (32 bytes read) [ 31.428998] random: sshd: uninitialized urandom read (32 bytes read) [ 166.801992] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.10.58' (ECDSA) to the list of known hosts. [ 172.361796] random: sshd: uninitialized urandom read (32 bytes read) 2018/09/08 05:11:43 parsed 1 programs [ 173.535329] random: cc1: uninitialized urandom read (8 bytes read) 2018/09/08 05:11:45 executed programs: 0 [ 174.730457] IPVS: ftp: loaded support on port[0] = 21 [ 174.971164] bridge0: port 1(bridge_slave_0) entered blocking state [ 174.978174] bridge0: port 1(bridge_slave_0) entered disabled state [ 174.985309] device bridge_slave_0 entered promiscuous mode [ 175.003762] bridge0: port 2(bridge_slave_1) entered blocking state [ 175.010461] bridge0: port 2(bridge_slave_1) entered disabled state [ 175.017495] device bridge_slave_1 entered promiscuous mode [ 175.036579] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bridge: link is not ready [ 175.054613] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bridge: link is not ready [ 175.106413] bond0: Enslaving bond_slave_0 as an active interface with an up link [ 175.127130] bond0: Enslaving bond_slave_1 as an active interface with an up link [ 175.201328] IPv6: ADDRCONF(NETDEV_UP): team_slave_0: link is not ready [ 175.208657] team0: Port device team_slave_0 added [ 175.226169] IPv6: ADDRCONF(NETDEV_UP): team_slave_1: link is not ready [ 175.233289] team0: Port device team_slave_1 added [ 175.249969] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 175.268955] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 175.287883] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 175.307931] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 175.453050] bridge0: port 2(bridge_slave_1) entered blocking state [ 175.459526] bridge0: port 2(bridge_slave_1) entered forwarding state [ 175.466372] bridge0: port 1(bridge_slave_0) entered blocking state [ 175.472771] bridge0: port 1(bridge_slave_0) entered forwarding state [ 175.983283] 8021q: adding VLAN 0 to HW filter on device bond0 [ 176.033390] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 176.084618] IPv6: ADDRCONF(NETDEV_UP): veth1: link is not ready [ 176.091249] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 176.099502] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 176.149403] 8021q: adding VLAN 0 to HW filter on device team0 [ 176.460396] ================================================================== [ 176.467906] BUG: KASAN: use-after-free in sock_i_ino+0x94/0xa0 [ 176.473879] Read of size 8 at addr ffff8801c43c95b0 by task syz-executor0/5610 [ 176.481394] [ 176.483012] CPU: 0 PID: 5610 Comm: syz-executor0 Not tainted 4.19.0-rc2+ #208 [ 176.490266] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 176.499642] Call Trace: [ 176.502230] dump_stack+0x1c4/0x2b4 [ 176.505993] ? dump_stack_print_info.cold.2+0x52/0x52 [ 176.511176] ? printk+0xa7/0xcf [ 176.514442] ? kmsg_dump_rewind_nolock+0xe4/0xe4 [ 176.519189] print_address_description.cold.8+0x9/0x1ff [ 176.524544] kasan_report.cold.9+0x242/0x309 [ 176.528941] ? sock_i_ino+0x94/0xa0 [ 176.532553] __asan_report_load8_noabort+0x14/0x20 [ 176.537526] sock_i_ino+0x94/0xa0 [ 176.540984] tipc_sk_fill_sock_diag+0x39c/0xd90 [ 176.545645] ? tipc_diag_dump+0x30/0x30 [ 176.549610] ? tipc_getname+0x7f0/0x7f0 [ 176.553576] ? graph_lock+0x170/0x170 [ 176.557359] ? __lock_sock+0x203/0x350 [ 176.561233] ? find_held_lock+0x36/0x1c0 [ 176.565280] ? mark_held_locks+0xc7/0x130 [ 176.569417] ? __local_bh_enable_ip+0x160/0x260 [ 176.574075] ? __local_bh_enable_ip+0x160/0x260 [ 176.578732] ? lockdep_hardirqs_on+0x421/0x5c0 [ 176.583309] ? trace_hardirqs_on+0xbd/0x310 [ 176.587619] ? lock_release+0x970/0x970 [ 176.591578] ? lock_sock_nested+0xe2/0x120 [ 176.595815] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 176.600813] ? skb_put+0x17b/0x1e0 [ 176.604396] ? memset+0x31/0x40 [ 176.607672] ? __nlmsg_put+0x14c/0x1b0 [ 176.611551] __tipc_add_sock_diag+0x233/0x360 [ 176.616036] tipc_nl_sk_walk+0x122/0x1d0 [ 176.620083] ? tipc_sock_diag_handler_dump+0x3d0/0x3d0 [ 176.625344] tipc_diag_dump+0x24/0x30 [ 176.629132] netlink_dump+0x519/0xd50 [ 176.632936] ? netlink_broadcast+0x50/0x50 [ 176.637209] __netlink_dump_start+0x4f1/0x6f0 [ 176.641705] ? tipc_data_ready+0x3e0/0x3e0 [ 176.645928] tipc_sock_diag_handler_dump+0x28e/0x3d0 [ 176.651018] ? __tipc_diag_gen_cookie+0xc0/0xc0 [ 176.655692] ? tipc_data_ready+0x3e0/0x3e0 [ 176.659910] ? tipc_unregister_sysctl+0x20/0x20 [ 176.664561] ? tipc_ioctl+0x3a0/0x3a0 [ 176.668344] ? netlink_deliver_tap+0x355/0xf80 [ 176.672913] sock_diag_rcv_msg+0x31d/0x410 [ 176.677133] netlink_rcv_skb+0x172/0x440 [ 176.681183] ? sock_diag_bind+0x80/0x80 [ 176.685143] ? netlink_ack+0xb80/0xb80 [ 176.689026] sock_diag_rcv+0x2a/0x40 [ 176.692726] netlink_unicast+0x5a5/0x760 [ 176.696773] ? netlink_attachskb+0x9a0/0x9a0 [ 176.701172] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 176.706697] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 176.711709] netlink_sendmsg+0xa18/0xfc0 [ 176.715762] ? netlink_unicast+0x760/0x760 [ 176.719983] ? aa_sock_msg_perm.isra.12+0xba/0x160 [ 176.724896] ? apparmor_socket_sendmsg+0x29/0x30 [ 176.729665] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 176.735192] ? security_socket_sendmsg+0x94/0xc0 [ 176.739938] ? netlink_unicast+0x760/0x760 [ 176.744198] sock_sendmsg+0xd5/0x120 [ 176.747918] ___sys_sendmsg+0x7fd/0x930 [ 176.751899] ? __local_bh_enable_ip+0x160/0x260 [ 176.756574] ? copy_msghdr_from_user+0x580/0x580 [ 176.761320] ? kasan_check_write+0x14/0x20 [ 176.765627] ? _raw_spin_unlock_bh+0x30/0x40 [ 176.770029] ? __bpf_trace_preemptirq_template+0x30/0x30 [ 176.775464] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 176.781001] ? release_sock+0x1ec/0x2c0 [ 176.784988] ? __fget_light+0x2e9/0x430 [ 176.788962] ? fget_raw+0x20/0x20 [ 176.792408] ? __release_sock+0x3a0/0x3a0 [ 176.796548] ? tipc_nametbl_build_group+0x273/0x360 [ 176.801554] ? tipc_setsockopt+0x726/0xd70 [ 176.805927] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 176.811456] ? sockfd_lookup_light+0xc5/0x160 [ 176.815936] __sys_sendmsg+0x11d/0x280 [ 176.819864] ? __ia32_sys_shutdown+0x80/0x80 [ 176.824269] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 176.829789] ? fput+0x130/0x1a0 [ 176.833059] ? __x64_sys_futex+0x47f/0x6a0 [ 176.837279] ? do_syscall_64+0x9a/0x820 [ 176.841239] ? do_syscall_64+0x9a/0x820 [ 176.845203] ? __bpf_trace_preemptirq_template+0x30/0x30 [ 176.850640] __x64_sys_sendmsg+0x78/0xb0 [ 176.854689] do_syscall_64+0x1b9/0x820 [ 176.858562] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 176.863909] ? syscall_return_slowpath+0x5e0/0x5e0 [ 176.868823] ? trace_hardirqs_off+0x300/0x300 [ 176.873302] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 176.878301] ? recalc_sigpending_tsk+0x180/0x180 [ 176.883042] ? kasan_check_write+0x14/0x20 [ 176.887263] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 176.892097] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 176.897269] RIP: 0033:0x457099 [ 176.900446] Code: fd b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 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 cb b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00 [ 176.919335] RSP: 002b:00007efe5ffecc78 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 176.927105] RAX: ffffffffffffffda RBX: 00007efe5ffed6d4 RCX: 0000000000457099 [ 176.934452] RDX: 0000000000000000 RSI: 0000000020000040 RDI: 0000000000000006 [ 176.941808] RBP: 00000000009300a0 R08: 0000000000000000 R09: 0000000000000000 [ 176.949127] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff [ 176.956399] R13: 00000000004d4bc0 R14: 00000000004c910b R15: 0000000000000000 [ 176.963665] [ 176.965370] Allocated by task 5610: [ 176.968993] save_stack+0x43/0xd0 [ 176.972430] kasan_kmalloc+0xc7/0xe0 [ 176.976126] kasan_slab_alloc+0x12/0x20 [ 176.980182] kmem_cache_alloc+0x12e/0x730 [ 176.984321] sock_alloc_inode+0x1d/0x260 [ 176.988363] alloc_inode+0x63/0x190 [ 176.991971] new_inode_pseudo+0x71/0x1a0 [ 176.996016] sock_alloc+0x41/0x270 [ 176.999539] __sock_create+0x175/0x930 [ 177.003415] __sys_socket+0x106/0x260 [ 177.007202] __x64_sys_socket+0x73/0xb0 [ 177.011164] do_syscall_64+0x1b9/0x820 [ 177.015038] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 177.020203] [ 177.021814] Freed by task 5609: [ 177.025075] save_stack+0x43/0xd0 [ 177.028514] __kasan_slab_free+0x102/0x150 [ 177.032728] kasan_slab_free+0xe/0x10 [ 177.036518] kmem_cache_free+0x83/0x290 [ 177.040549] sock_destroy_inode+0x51/0x60 [ 177.044694] destroy_inode+0x159/0x200 [ 177.048567] evict+0x5e0/0x980 [ 177.051742] iput+0x679/0xa90 [ 177.054831] dentry_unlink_inode+0x461/0x5e0 [ 177.059247] __dentry_kill+0x44c/0x7a0 [ 177.063120] dentry_kill+0xc9/0x5a0 [ 177.066727] dput.part.26+0x660/0x790 [ 177.070510] dput+0x15/0x20 [ 177.073421] __fput+0x4cf/0xa30 [ 177.076686] ____fput+0x15/0x20 [ 177.079963] task_work_run+0x1e8/0x2a0 [ 177.083836] exit_to_usermode_loop+0x318/0x380 [ 177.088472] do_syscall_64+0x6be/0x820 [ 177.092356] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 177.097584] [ 177.099206] The buggy address belongs to the object at ffff8801c43c9540 [ 177.099206] which belongs to the cache sock_inode_cache(17:syz0) of size 984 [ 177.113060] The buggy address is located 112 bytes inside of [ 177.113060] 984-byte region [ffff8801c43c9540, ffff8801c43c9918) [ 177.124918] The buggy address belongs to the page: [ 177.129834] page:ffffea000710f240 count:1 mapcount:0 mapping:ffff8801ca01e800 index:0xffff8801c43c9ffd [ 177.139261] flags: 0x2fffc0000000100(slab) [ 177.143487] raw: 02fffc0000000100 ffffea0006dce648 ffffea0006cd07c8 ffff8801ca01e800 [ 177.151353] raw: ffff8801c43c9ffd ffff8801c43c90c0 0000000100000003 ffff8801b8d6a2c0 [ 177.159217] page dumped because: kasan: bad access detected [ 177.164912] page->mem_cgroup:ffff8801b8d6a2c0 [ 177.169387] [ 177.170991] Memory state around the buggy address: [ 177.175904] ffff8801c43c9480: fb fb fb fc fc fc fc fc fc fc fc fc fc fc fc fc [ 177.183254] ffff8801c43c9500: fc fc fc fc fc fc fc fc fb fb fb fb fb fb fb fb [ 177.190595] >ffff8801c43c9580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 177.198023] ^ [ 177.202935] ffff8801c43c9600: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 177.210277] ffff8801c43c9680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 177.217611] ================================================================== [ 177.224948] Disabling lock debugging due to kernel taint [ 177.230485] Kernel panic - not syncing: panic_on_warn set ... [ 177.230485] [ 177.237840] CPU: 0 PID: 5610 Comm: syz-executor0 Tainted: G B 4.19.0-rc2+ #208 [ 177.246484] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 177.255815] Call Trace: [ 177.258459] dump_stack+0x1c4/0x2b4 [ 177.262086] ? dump_stack_print_info.cold.2+0x52/0x52 [ 177.267268] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 177.272013] panic+0x238/0x4e7 [ 177.275189] ? add_taint.cold.5+0x16/0x16 [ 177.279326] ? trace_hardirqs_on+0x9a/0x310 [ 177.283637] ? trace_hardirqs_on+0xb4/0x310 [ 177.287947] ? trace_hardirqs_on+0xb4/0x310 [ 177.292254] kasan_end_report+0x47/0x4f [ 177.296209] kasan_report.cold.9+0x76/0x309 [ 177.300525] ? sock_i_ino+0x94/0xa0 [ 177.304185] __asan_report_load8_noabort+0x14/0x20 [ 177.309217] sock_i_ino+0x94/0xa0 [ 177.312668] tipc_sk_fill_sock_diag+0x39c/0xd90 [ 177.317340] ? tipc_diag_dump+0x30/0x30 [ 177.321301] ? tipc_getname+0x7f0/0x7f0 [ 177.325270] ? graph_lock+0x170/0x170 [ 177.329059] ? __lock_sock+0x203/0x350 [ 177.332969] ? find_held_lock+0x36/0x1c0 [ 177.337020] ? mark_held_locks+0xc7/0x130 [ 177.341160] ? __local_bh_enable_ip+0x160/0x260 [ 177.345815] ? __local_bh_enable_ip+0x160/0x260 [ 177.350468] ? lockdep_hardirqs_on+0x421/0x5c0 [ 177.355035] ? trace_hardirqs_on+0xbd/0x310 [ 177.359342] ? lock_release+0x970/0x970 [ 177.363311] ? lock_sock_nested+0xe2/0x120 [ 177.367695] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 177.372697] ? skb_put+0x17b/0x1e0 [ 177.376223] ? memset+0x31/0x40 [ 177.379493] ? __nlmsg_put+0x14c/0x1b0 [ 177.383381] __tipc_add_sock_diag+0x233/0x360 [ 177.387882] tipc_nl_sk_walk+0x122/0x1d0 [ 177.391930] ? tipc_sock_diag_handler_dump+0x3d0/0x3d0 [ 177.397192] tipc_diag_dump+0x24/0x30 [ 177.400986] netlink_dump+0x519/0xd50 [ 177.404808] ? netlink_broadcast+0x50/0x50 [ 177.409052] __netlink_dump_start+0x4f1/0x6f0 [ 177.413552] ? tipc_data_ready+0x3e0/0x3e0 [ 177.417775] tipc_sock_diag_handler_dump+0x28e/0x3d0 [ 177.422863] ? __tipc_diag_gen_cookie+0xc0/0xc0 [ 177.427526] ? tipc_data_ready+0x3e0/0x3e0 [ 177.431755] ? tipc_unregister_sysctl+0x20/0x20 [ 177.436409] ? tipc_ioctl+0x3a0/0x3a0 [ 177.440195] ? netlink_deliver_tap+0x355/0xf80 [ 177.444778] sock_diag_rcv_msg+0x31d/0x410 [ 177.449013] netlink_rcv_skb+0x172/0x440 [ 177.453060] ? sock_diag_bind+0x80/0x80 [ 177.457022] ? netlink_ack+0xb80/0xb80 [ 177.460897] sock_diag_rcv+0x2a/0x40 [ 177.464595] netlink_unicast+0x5a5/0x760 [ 177.468646] ? netlink_attachskb+0x9a0/0x9a0 [ 177.473041] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 177.478562] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 177.483563] netlink_sendmsg+0xa18/0xfc0 [ 177.487614] ? netlink_unicast+0x760/0x760 [ 177.491834] ? aa_sock_msg_perm.isra.12+0xba/0x160 [ 177.496754] ? apparmor_socket_sendmsg+0x29/0x30 [ 177.501496] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 177.507333] ? security_socket_sendmsg+0x94/0xc0 [ 177.512076] ? netlink_unicast+0x760/0x760 [ 177.516299] sock_sendmsg+0xd5/0x120 [ 177.520005] ___sys_sendmsg+0x7fd/0x930 [ 177.523980] ? __local_bh_enable_ip+0x160/0x260 [ 177.528659] ? copy_msghdr_from_user+0x580/0x580 [ 177.533406] ? kasan_check_write+0x14/0x20 [ 177.537629] ? _raw_spin_unlock_bh+0x30/0x40 [ 177.542029] ? __bpf_trace_preemptirq_template+0x30/0x30 [ 177.547466] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 177.552986] ? release_sock+0x1ec/0x2c0 [ 177.556947] ? __fget_light+0x2e9/0x430 [ 177.560907] ? fget_raw+0x20/0x20 [ 177.564349] ? __release_sock+0x3a0/0x3a0 [ 177.568483] ? tipc_nametbl_build_group+0x273/0x360 [ 177.573499] ? tipc_setsockopt+0x726/0xd70 [ 177.577723] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 177.583252] ? sockfd_lookup_light+0xc5/0x160 [ 177.587756] __sys_sendmsg+0x11d/0x280 [ 177.591636] ? __ia32_sys_shutdown+0x80/0x80 [ 177.596037] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 177.601569] ? fput+0x130/0x1a0 [ 177.604859] ? __x64_sys_futex+0x47f/0x6a0 [ 177.609094] ? do_syscall_64+0x9a/0x820 [ 177.613053] ? do_syscall_64+0x9a/0x820 [ 177.617017] ? __bpf_trace_preemptirq_template+0x30/0x30 [ 177.622455] __x64_sys_sendmsg+0x78/0xb0 [ 177.626513] do_syscall_64+0x1b9/0x820 [ 177.630403] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 177.635756] ? syscall_return_slowpath+0x5e0/0x5e0 [ 177.640671] ? trace_hardirqs_off+0x300/0x300 [ 177.645159] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 177.650166] ? recalc_sigpending_tsk+0x180/0x180 [ 177.654908] ? kasan_check_write+0x14/0x20 [ 177.659131] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 177.663976] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 177.669168] RIP: 0033:0x457099 [ 177.672350] Code: fd b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 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 cb b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00 [ 177.691236] RSP: 002b:00007efe5ffecc78 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 177.698934] RAX: ffffffffffffffda RBX: 00007efe5ffed6d4 RCX: 0000000000457099 [ 177.706188] RDX: 0000000000000000 RSI: 0000000020000040 RDI: 0000000000000006 [ 177.713439] RBP: 00000000009300a0 R08: 0000000000000000 R09: 0000000000000000 [ 177.720691] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff [ 177.727946] R13: 00000000004d4bc0 R14: 00000000004c910b R15: 0000000000000000 [ 177.735511] Dumping ftrace buffer: [ 177.739038] (ftrace buffer empty) [ 177.743386] Kernel Offset: disabled [ 177.747012] Rebooting in 86400 seconds..