[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 22.725894] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 24.884244] random: sshd: uninitialized urandom read (32 bytes read) [ 25.219624] random: sshd: uninitialized urandom read (32 bytes read) [ 25.774584] random: sshd: uninitialized urandom read (32 bytes read) [ 104.097580] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.0.7' (ECDSA) to the list of known hosts. [ 109.760661] random: sshd: uninitialized urandom read (32 bytes read) 2018/09/06 04:49:55 parsed 1 programs [ 110.864119] random: cc1: uninitialized urandom read (8 bytes read) 2018/09/06 04:49:57 executed programs: 0 [ 111.922825] IPVS: ftp: loaded support on port[0] = 21 [ 112.143354] bridge0: port 1(bridge_slave_0) entered blocking state [ 112.149875] bridge0: port 1(bridge_slave_0) entered disabled state [ 112.157521] device bridge_slave_0 entered promiscuous mode [ 112.173813] bridge0: port 2(bridge_slave_1) entered blocking state [ 112.180170] bridge0: port 2(bridge_slave_1) entered disabled state [ 112.187802] device bridge_slave_1 entered promiscuous mode [ 112.204468] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bridge: link is not ready [ 112.222301] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bridge: link is not ready [ 112.267023] bond0: Enslaving bond_slave_0 as an active interface with an up link [ 112.286693] bond0: Enslaving bond_slave_1 as an active interface with an up link [ 112.354377] IPv6: ADDRCONF(NETDEV_UP): team_slave_0: link is not ready [ 112.362058] team0: Port device team_slave_0 added [ 112.377476] IPv6: ADDRCONF(NETDEV_UP): team_slave_1: link is not ready [ 112.385284] team0: Port device team_slave_1 added [ 112.400625] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 112.419879] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 112.437373] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 112.455851] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 112.583128] bridge0: port 2(bridge_slave_1) entered blocking state [ 112.589737] bridge0: port 2(bridge_slave_1) entered forwarding state [ 112.596551] bridge0: port 1(bridge_slave_0) entered blocking state [ 112.602929] bridge0: port 1(bridge_slave_0) entered forwarding state [ 113.060644] IPv6: ADDRCONF(NETDEV_UP): bond0: link is not ready [ 113.066879] 8021q: adding VLAN 0 to HW filter on device bond0 [ 113.112475] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 113.142288] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 113.161592] IPv6: ADDRCONF(NETDEV_UP): veth1: link is not ready [ 113.167717] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 113.174946] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 113.214526] 8021q: adding VLAN 0 to HW filter on device team0 [ 113.517740] ================================================================== [ 113.525381] BUG: KASAN: use-after-free in sock_i_ino+0x94/0xa0 [ 113.531340] Read of size 8 at addr ffff8801b3714230 by task syz-executor0/4930 [ 113.538729] [ 113.540351] CPU: 1 PID: 4930 Comm: syz-executor0 Not tainted 4.19.0-rc2-next-20180904+ #55 [ 113.548732] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 113.558080] Call Trace: [ 113.560688] dump_stack+0x1c9/0x2b4 [ 113.564299] ? dump_stack_print_info.cold.2+0x52/0x52 [ 113.569480] ? printk+0xa7/0xcf [ 113.572746] ? kmsg_dump_rewind_nolock+0xe4/0xe4 [ 113.577488] ? sock_i_ino+0x94/0xa0 [ 113.581115] print_address_description+0x6c/0x20b [ 113.586034] ? sock_i_ino+0x94/0xa0 [ 113.589660] kasan_report.cold.7+0x242/0x30d [ 113.594240] __asan_report_load8_noabort+0x14/0x20 [ 113.599164] sock_i_ino+0x94/0xa0 [ 113.602622] tipc_sk_fill_sock_diag+0x3be/0xdb0 [ 113.607272] ? tipc_diag_dump+0x30/0x30 [ 113.611236] ? tipc_getname+0x7f0/0x7f0 [ 113.615192] ? print_usage_bug+0xc0/0xc0 [ 113.619252] ? graph_lock+0x170/0x170 [ 113.623036] ? __lock_sock+0x203/0x360 [ 113.626924] ? find_held_lock+0x36/0x1c0 [ 113.630983] ? mark_held_locks+0xc9/0x160 [ 113.635130] ? __local_bh_enable_ip+0x161/0x230 [ 113.639871] ? __local_bh_enable_ip+0x161/0x230 [ 113.644629] ? lockdep_hardirqs_on+0x421/0x5c0 [ 113.649213] ? trace_hardirqs_on+0xbd/0x2c0 [ 113.653516] ? lock_release+0x9f0/0x9f0 [ 113.657475] ? lock_sock_nested+0xe7/0x120 [ 113.661693] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 113.666688] ? skb_put+0x17b/0x1e0 [ 113.670214] ? memset+0x31/0x40 [ 113.673477] ? __nlmsg_put+0x14c/0x1b0 [ 113.677353] __tipc_add_sock_diag+0x22f/0x360 [ 113.681831] tipc_nl_sk_walk+0x122/0x1d0 [ 113.685876] ? tipc_sock_diag_handler_dump+0x3d0/0x3d0 [ 113.691140] tipc_diag_dump+0x24/0x30 [ 113.694922] netlink_dump+0x519/0xd50 [ 113.698706] ? netlink_broadcast+0x50/0x50 [ 113.702928] __netlink_dump_start+0x4f1/0x6f0 [ 113.707416] ? kasan_check_read+0x11/0x20 [ 113.711558] ? tipc_data_ready+0x3f0/0x3f0 [ 113.715918] tipc_sock_diag_handler_dump+0x28e/0x3d0 [ 113.721015] ? __tipc_diag_gen_cookie+0xc0/0xc0 [ 113.725684] ? tipc_data_ready+0x3f0/0x3f0 [ 113.729904] ? tipc_unregister_sysctl+0x20/0x20 [ 113.734555] ? tipc_ioctl+0x3b0/0x3b0 [ 113.738338] ? netlink_deliver_tap+0x356/0xfb0 [ 113.742910] sock_diag_rcv_msg+0x31d/0x410 [ 113.747132] netlink_rcv_skb+0x172/0x440 [ 113.751189] ? sock_diag_bind+0x80/0x80 [ 113.755165] ? netlink_ack+0xbe0/0xbe0 [ 113.759047] ? rcu_cleanup_dead_rnp+0x200/0x200 [ 113.763706] sock_diag_rcv+0x2a/0x40 [ 113.767407] netlink_unicast+0x5a0/0x760 [ 113.771484] ? netlink_attachskb+0x9a0/0x9a0 [ 113.775878] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 113.781395] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 113.786396] netlink_sendmsg+0xa18/0xfc0 [ 113.790442] ? netlink_unicast+0x760/0x760 [ 113.794660] ? aa_sock_msg_perm.isra.13+0xba/0x160 [ 113.799580] ? apparmor_socket_sendmsg+0x29/0x30 [ 113.804338] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 113.809890] ? security_socket_sendmsg+0x94/0xc0 [ 113.814627] ? netlink_unicast+0x760/0x760 [ 113.818846] sock_sendmsg+0xd5/0x120 [ 113.822541] ___sys_sendmsg+0x7fd/0x930 [ 113.826501] ? copy_msghdr_from_user+0x580/0x580 [ 113.831238] ? trace_hardirqs_off_caller+0x2b0/0x2b0 [ 113.836329] ? do_raw_spin_unlock+0xa7/0x2f0 [ 113.840723] ? __release_sock+0x276/0x3a0 [ 113.844855] ? __fget_light+0x2f7/0x440 [ 113.848813] ? __local_bh_enable_ip+0x161/0x230 [ 113.853474] ? fget_raw+0x20/0x20 [ 113.856918] ? __fget_light+0x2f7/0x440 [ 113.860879] ? fget_raw+0x20/0x20 [ 113.864321] ? tipc_nametbl_build_group+0x279/0x360 [ 113.869347] ? tipc_setsockopt+0x726/0xd70 [ 113.873568] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 113.879082] ? sockfd_lookup_light+0xc5/0x160 [ 113.883650] __sys_sendmsg+0x11d/0x290 [ 113.887535] ? __ia32_sys_shutdown+0x80/0x80 [ 113.892030] ? __x64_sys_futex+0x47f/0x6a0 [ 113.896253] ? do_syscall_64+0x9a/0x820 [ 113.900223] ? do_syscall_64+0x9a/0x820 [ 113.904183] ? trace_hardirqs_off_caller+0x2b0/0x2b0 [ 113.909300] __x64_sys_sendmsg+0x78/0xb0 [ 113.913352] do_syscall_64+0x1b9/0x820 [ 113.917224] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 113.922569] ? syscall_return_slowpath+0x5e0/0x5e0 [ 113.927483] ? trace_hardirqs_on_caller+0x2b0/0x2b0 [ 113.932480] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 113.937479] ? recalc_sigpending_tsk+0x180/0x180 [ 113.942217] ? kasan_check_write+0x14/0x20 [ 113.946440] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 113.951376] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 113.956551] RIP: 0033:0x457099 [ 113.959728] 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 [ 113.978608] RSP: 002b:00007f73c6819c78 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 113.986302] RAX: ffffffffffffffda RBX: 00007f73c681a6d4 RCX: 0000000000457099 [ 113.993560] RDX: 0000000000000000 RSI: 0000000020000040 RDI: 0000000000000006 [ 114.000813] RBP: 00000000009300a0 R08: 0000000000000000 R09: 0000000000000000 [ 114.008068] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff [ 114.015334] R13: 00000000004d4bc0 R14: 00000000004c910b R15: 0000000000000000 [ 114.022586] [ 114.024208] Allocated by task 4930: [ 114.027815] save_stack+0x43/0xd0 [ 114.031246] kasan_kmalloc+0xc4/0xe0 [ 114.034954] kasan_slab_alloc+0x12/0x20 [ 114.038911] kmem_cache_alloc+0x12e/0x710 [ 114.043063] sock_alloc_inode+0x1d/0x260 [ 114.047211] alloc_inode+0x63/0x190 [ 114.050824] new_inode_pseudo+0x71/0x1a0 [ 114.054866] sock_alloc+0x41/0x270 [ 114.058387] __sock_create+0x175/0x940 [ 114.062252] __sys_socket+0x106/0x260 [ 114.066034] __x64_sys_socket+0x73/0xb0 [ 114.069987] do_syscall_64+0x1b9/0x820 [ 114.073864] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 114.079034] [ 114.080642] Freed by task 4929: [ 114.083899] save_stack+0x43/0xd0 [ 114.087335] __kasan_slab_free+0x11a/0x170 [ 114.091551] kasan_slab_free+0xe/0x10 [ 114.095336] kmem_cache_free+0x86/0x280 [ 114.099289] sock_destroy_inode+0x51/0x60 [ 114.103418] destroy_inode+0x159/0x200 [ 114.107285] evict+0x5d5/0x990 [ 114.110456] iput+0x5fa/0xa00 [ 114.113617] dentry_unlink_inode+0x461/0x5e0 [ 114.118029] __dentry_kill+0x44c/0x7a0 [ 114.121932] dentry_kill+0xc9/0x5a0 [ 114.125541] dput.part.26+0x66b/0x7a0 [ 114.129325] dput+0x15/0x20 [ 114.132235] __fput+0x505/0xa80 [ 114.135492] ____fput+0x15/0x20 [ 114.138756] task_work_run+0x1e8/0x2a0 [ 114.142634] exit_to_usermode_loop+0x318/0x380 [ 114.147196] do_syscall_64+0x6be/0x820 [ 114.151063] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 114.156342] [ 114.157956] The buggy address belongs to the object at ffff8801b37141c0 [ 114.157956] which belongs to the cache sock_inode_cache(17:syz0) of size 984 [ 114.171811] The buggy address is located 112 bytes inside of [ 114.171811] 984-byte region [ffff8801b37141c0, ffff8801b3714598) [ 114.183662] The buggy address belongs to the page: [ 114.188589] page:ffffea0006cdc500 count:1 mapcount:0 mapping:ffff8801cbe19800 index:0xffff8801b3714ffd [ 114.198019] flags: 0x2fffc0000000100(slab) [ 114.202242] raw: 02fffc0000000100 ffffea0006cd9d48 ffffea0006cdcd88 ffff8801cbe19800 [ 114.210134] raw: ffff8801b3714ffd ffff8801b37141c0 0000000100000003 ffff8801b67ce580 [ 114.217987] page dumped because: kasan: bad access detected [ 114.223675] page->mem_cgroup:ffff8801b67ce580 [ 114.228150] [ 114.229754] Memory state around the buggy address: [ 114.234666] ffff8801b3714100: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 114.242010] ffff8801b3714180: fc fc fc fc fc fc fc fc fb fb fb fb fb fb fb fb [ 114.249348] >ffff8801b3714200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 114.256685] ^ [ 114.261600] ffff8801b3714280: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 114.268941] ffff8801b3714300: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 114.276289] ================================================================== [ 114.283636] Disabling lock debugging due to kernel taint [ 114.289126] Kernel panic - not syncing: panic_on_warn set ... [ 114.289126] [ 114.296500] CPU: 1 PID: 4930 Comm: syz-executor0 Tainted: G B 4.19.0-rc2-next-20180904+ #55 [ 114.306283] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 114.315616] Call Trace: [ 114.318189] dump_stack+0x1c9/0x2b4 [ 114.321806] ? dump_stack_print_info.cold.2+0x52/0x52 [ 114.326986] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 114.331726] panic+0x238/0x4e7 [ 114.334911] ? add_taint.cold.5+0x16/0x16 [ 114.339056] ? trace_hardirqs_on+0xb4/0x2c0 [ 114.343363] ? trace_hardirqs_on+0x9a/0x2c0 [ 114.347671] ? sock_i_ino+0x94/0xa0 [ 114.351281] kasan_end_report+0x47/0x4f [ 114.355235] kasan_report.cold.7+0x76/0x30d [ 114.359562] __asan_report_load8_noabort+0x14/0x20 [ 114.364476] sock_i_ino+0x94/0xa0 [ 114.367914] tipc_sk_fill_sock_diag+0x3be/0xdb0 [ 114.372581] ? tipc_diag_dump+0x30/0x30 [ 114.376540] ? tipc_getname+0x7f0/0x7f0 [ 114.380499] ? print_usage_bug+0xc0/0xc0 [ 114.384542] ? graph_lock+0x170/0x170 [ 114.388329] ? __lock_sock+0x203/0x360 [ 114.392236] ? find_held_lock+0x36/0x1c0 [ 114.396283] ? mark_held_locks+0xc9/0x160 [ 114.400425] ? __local_bh_enable_ip+0x161/0x230 [ 114.405109] ? __local_bh_enable_ip+0x161/0x230 [ 114.409847] ? lockdep_hardirqs_on+0x421/0x5c0 [ 114.414422] ? trace_hardirqs_on+0xbd/0x2c0 [ 114.418731] ? lock_release+0x9f0/0x9f0 [ 114.422687] ? lock_sock_nested+0xe7/0x120 [ 114.426906] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 114.431905] ? skb_put+0x17b/0x1e0 [ 114.435431] ? memset+0x31/0x40 [ 114.438697] ? __nlmsg_put+0x14c/0x1b0 [ 114.442830] __tipc_add_sock_diag+0x22f/0x360 [ 114.447320] tipc_nl_sk_walk+0x122/0x1d0 [ 114.451374] ? tipc_sock_diag_handler_dump+0x3d0/0x3d0 [ 114.456642] tipc_diag_dump+0x24/0x30 [ 114.460446] netlink_dump+0x519/0xd50 [ 114.464237] ? netlink_broadcast+0x50/0x50 [ 114.468462] __netlink_dump_start+0x4f1/0x6f0 [ 114.472943] ? kasan_check_read+0x11/0x20 [ 114.477079] ? tipc_data_ready+0x3f0/0x3f0 [ 114.481309] tipc_sock_diag_handler_dump+0x28e/0x3d0 [ 114.486414] ? __tipc_diag_gen_cookie+0xc0/0xc0 [ 114.491081] ? tipc_data_ready+0x3f0/0x3f0 [ 114.495307] ? tipc_unregister_sysctl+0x20/0x20 [ 114.499965] ? tipc_ioctl+0x3b0/0x3b0 [ 114.503748] ? netlink_deliver_tap+0x356/0xfb0 [ 114.508325] sock_diag_rcv_msg+0x31d/0x410 [ 114.512544] netlink_rcv_skb+0x172/0x440 [ 114.516594] ? sock_diag_bind+0x80/0x80 [ 114.520555] ? netlink_ack+0xbe0/0xbe0 [ 114.524436] ? rcu_cleanup_dead_rnp+0x200/0x200 [ 114.529100] sock_diag_rcv+0x2a/0x40 [ 114.532810] netlink_unicast+0x5a0/0x760 [ 114.536868] ? netlink_attachskb+0x9a0/0x9a0 [ 114.541259] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 114.546791] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 114.551794] netlink_sendmsg+0xa18/0xfc0 [ 114.555844] ? netlink_unicast+0x760/0x760 [ 114.560062] ? aa_sock_msg_perm.isra.13+0xba/0x160 [ 114.564975] ? apparmor_socket_sendmsg+0x29/0x30 [ 114.569713] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 114.575232] ? security_socket_sendmsg+0x94/0xc0 [ 114.580427] ? netlink_unicast+0x760/0x760 [ 114.584656] sock_sendmsg+0xd5/0x120 [ 114.588367] ___sys_sendmsg+0x7fd/0x930 [ 114.592339] ? copy_msghdr_from_user+0x580/0x580 [ 114.597082] ? trace_hardirqs_off_caller+0x2b0/0x2b0 [ 114.602169] ? do_raw_spin_unlock+0xa7/0x2f0 [ 114.606561] ? __release_sock+0x276/0x3a0 [ 114.610699] ? __fget_light+0x2f7/0x440 [ 114.614658] ? __local_bh_enable_ip+0x161/0x230 [ 114.619309] ? fget_raw+0x20/0x20 [ 114.622756] ? __fget_light+0x2f7/0x440 [ 114.626713] ? fget_raw+0x20/0x20 [ 114.630149] ? tipc_nametbl_build_group+0x279/0x360 [ 114.635147] ? tipc_setsockopt+0x726/0xd70 [ 114.639369] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 114.644890] ? sockfd_lookup_light+0xc5/0x160 [ 114.649369] __sys_sendmsg+0x11d/0x290 [ 114.653248] ? __ia32_sys_shutdown+0x80/0x80 [ 114.657641] ? __x64_sys_futex+0x47f/0x6a0 [ 114.661859] ? do_syscall_64+0x9a/0x820 [ 114.665813] ? do_syscall_64+0x9a/0x820 [ 114.669778] ? trace_hardirqs_off_caller+0x2b0/0x2b0 [ 114.674878] __x64_sys_sendmsg+0x78/0xb0 [ 114.678922] do_syscall_64+0x1b9/0x820 [ 114.682796] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 114.688158] ? syscall_return_slowpath+0x5e0/0x5e0 [ 114.693069] ? trace_hardirqs_on_caller+0x2b0/0x2b0 [ 114.698077] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 114.703083] ? recalc_sigpending_tsk+0x180/0x180 [ 114.707824] ? kasan_check_write+0x14/0x20 [ 114.712043] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 114.716870] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 114.722040] RIP: 0033:0x457099 [ 114.725216] 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 [ 114.744097] RSP: 002b:00007f73c6819c78 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 114.751787] RAX: ffffffffffffffda RBX: 00007f73c681a6d4 RCX: 0000000000457099 [ 114.759036] RDX: 0000000000000000 RSI: 0000000020000040 RDI: 0000000000000006 [ 114.766286] RBP: 00000000009300a0 R08: 0000000000000000 R09: 0000000000000000 [ 114.773534] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff [ 114.780800] R13: 00000000004d4bc0 R14: 00000000004c910b R15: 0000000000000000 [ 114.788405] Dumping ftrace buffer: [ 114.791929] (ftrace buffer empty) [ 114.795635] Kernel Offset: disabled [ 114.799242] Rebooting in 86400 seconds..