Warning: Permanently added '10.128.0.238' (ECDSA) to the list of known hosts. [ 42.841354] random: sshd: uninitialized urandom read (32 bytes read) [ 42.963035] audit: type=1400 audit(1569021619.770:36): avc: denied { map } for pid=7025 comm="syz-executor344" path="/root/syz-executor344672674" dev="sda1" ino=16484 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:user_home_t:s0 tclass=file permissive=1 [ 43.190953] IPVS: ftp: loaded support on port[0] = 21 [ 43.998000] chnl_net:caif_netlink_parms(): no params data found [ 44.026341] bridge0: port 1(bridge_slave_0) entered blocking state [ 44.033955] bridge0: port 1(bridge_slave_0) entered disabled state [ 44.041267] device bridge_slave_0 entered promiscuous mode [ 44.048303] bridge0: port 2(bridge_slave_1) entered blocking state [ 44.054813] bridge0: port 2(bridge_slave_1) entered disabled state [ 44.061730] device bridge_slave_1 entered promiscuous mode [ 44.075355] bond0: Enslaving bond_slave_0 as an active interface with an up link [ 44.084323] bond0: Enslaving bond_slave_1 as an active interface with an up link [ 44.099284] IPv6: ADDRCONF(NETDEV_UP): team_slave_0: link is not ready [ 44.106671] team0: Port device team_slave_0 added [ 44.112076] IPv6: ADDRCONF(NETDEV_UP): team_slave_1: link is not ready [ 44.119767] team0: Port device team_slave_1 added [ 44.125087] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_0: link is not ready [ 44.132297] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_1: link is not ready [ 44.202132] device hsr_slave_0 entered promiscuous mode [ 44.240442] device hsr_slave_1 entered promiscuous mode [ 44.301264] IPv6: ADDRCONF(NETDEV_UP): hsr_slave_0: link is not ready [ 44.308362] IPv6: ADDRCONF(NETDEV_UP): hsr_slave_1: link is not ready [ 44.321383] bridge0: port 2(bridge_slave_1) entered blocking state [ 44.328073] bridge0: port 2(bridge_slave_1) entered forwarding state [ 44.335044] bridge0: port 1(bridge_slave_0) entered blocking state [ 44.341440] bridge0: port 1(bridge_slave_0) entered forwarding state [ 44.367025] IPv6: ADDRCONF(NETDEV_UP): bond0: link is not ready [ 44.374111] 8021q: adding VLAN 0 to HW filter on device bond0 [ 44.382446] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 44.391376] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 44.409474] bridge0: port 1(bridge_slave_0) entered disabled state [ 44.416935] bridge0: port 2(bridge_slave_1) entered disabled state [ 44.426734] IPv6: ADDRCONF(NETDEV_UP): team0: link is not ready [ 44.432926] 8021q: adding VLAN 0 to HW filter on device team0 [ 44.441886] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 44.449436] bridge0: port 1(bridge_slave_0) entered blocking state [ 44.455829] bridge0: port 1(bridge_slave_0) entered forwarding state [ 44.470791] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 44.478664] bridge0: port 2(bridge_slave_1) entered blocking state [ 44.485051] bridge0: port 2(bridge_slave_1) entered forwarding state [ 44.492617] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 44.506211] hsr0: Slave A (hsr_slave_0) is not up; please bring it up to get a fully working HSR network [ 44.516925] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network [ 44.527532] IPv6: ADDRCONF(NETDEV_UP): hsr0: link is not ready [ 44.534274] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 44.541867] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 44.549448] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 44.557335] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready executing program [ 44.565917] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 44.577551] IPv6: ADDRCONF(NETDEV_UP): vxcan1: link is not ready [ 44.586989] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 44.691040] ================================================================== [ 44.698657] BUG: KASAN: use-after-free in tcp_init_tso_segs+0x1ae/0x200 [ 44.705420] Read of size 2 at addr ffff888097f84d70 by task syz-executor344/7026 [ 44.712954] [ 44.714569] CPU: 1 PID: 7026 Comm: syz-executor344 Not tainted 4.14.145 #0 [ 44.721561] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 44.731007] Call Trace: [ 44.733579] dump_stack+0x138/0x197 [ 44.737285] ? tcp_init_tso_segs+0x1ae/0x200 [ 44.741681] print_address_description.cold+0x7c/0x1dc [ 44.746972] ? tcp_init_tso_segs+0x1ae/0x200 [ 44.751375] kasan_report.cold+0xa9/0x2af [ 44.755507] __asan_report_load2_noabort+0x14/0x20 [ 44.760435] tcp_init_tso_segs+0x1ae/0x200 [ 44.764665] ? tcp_tso_segs+0x7d/0x1c0 [ 44.768541] tcp_write_xmit+0x15e/0x4960 [ 44.772601] ? tcp_v4_md5_lookup+0x23/0x30 [ 44.776834] ? tcp_established_options+0x2c5/0x420 [ 44.781754] ? tcp_current_mss+0x1dc/0x2f0 [ 44.785972] ? __alloc_skb+0x3ee/0x500 [ 44.789843] __tcp_push_pending_frames+0xa6/0x260 [ 44.794674] tcp_send_fin+0x17e/0xc40 [ 44.798473] tcp_close+0xcc8/0xfb0 [ 44.802010] ? __sock_release+0x89/0x2b0 [ 44.806056] ? ip_mc_drop_socket+0x1d6/0x230 [ 44.810463] inet_release+0xec/0x1c0 [ 44.814175] __sock_release+0xce/0x2b0 [ 44.818048] ? __sock_release+0x2b0/0x2b0 [ 44.822329] sock_close+0x1b/0x30 [ 44.825768] __fput+0x275/0x7a0 [ 44.829210] ____fput+0x16/0x20 [ 44.832476] task_work_run+0x114/0x190 [ 44.836365] do_exit+0x7df/0x2c10 [ 44.839802] ? mm_update_next_owner+0x5d0/0x5d0 [ 44.844463] ? up_read+0x1a/0x40 [ 44.847824] ? __do_page_fault+0x358/0xb80 [ 44.852046] do_group_exit+0x111/0x330 [ 44.855921] SyS_exit_group+0x1d/0x20 [ 44.859702] ? do_group_exit+0x330/0x330 [ 44.863753] do_syscall_64+0x1e8/0x640 [ 44.867623] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 44.872474] entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 44.877667] RIP: 0033:0x440618 [ 44.880850] RSP: 002b:00007ffdd2788668 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 44.888555] RAX: ffffffffffffffda RBX: 0000000000000001 RCX: 0000000000440618 [ 44.895819] RDX: 0000000000000001 RSI: 000000000000003c RDI: 0000000000000001 [ 44.903089] RBP: 00000000004c6970 R08: 00000000000000e7 R09: ffffffffffffffd0 [ 44.910344] R10: 0000000020000800 R11: 0000000000000246 R12: 0000000000000001 [ 44.917947] R13: 00000000006d95e0 R14: 0000000000000000 R15: 0000000000000000 [ 44.925219] [ 44.926829] Allocated by task 7026: [ 44.930452] save_stack_trace+0x16/0x20 [ 44.934409] save_stack+0x45/0xd0 [ 44.937853] kasan_kmalloc+0xce/0xf0 [ 44.941548] kasan_slab_alloc+0xf/0x20 [ 44.945416] kmem_cache_alloc_node+0x144/0x780 [ 44.949995] __alloc_skb+0x9c/0x500 [ 44.953637] sk_stream_alloc_skb+0xb3/0x780 [ 44.957942] tcp_sendmsg_locked+0xf61/0x3200 [ 44.962352] tcp_sendmsg+0x30/0x50 [ 44.965876] inet_sendmsg+0x122/0x500 [ 44.969660] sock_sendmsg+0xce/0x110 [ 44.973362] SYSC_sendto+0x206/0x310 [ 44.977060] SyS_sendto+0x40/0x50 [ 44.980502] do_syscall_64+0x1e8/0x640 [ 44.984385] entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 44.989555] [ 44.991166] Freed by task 7026: [ 44.994431] save_stack_trace+0x16/0x20 [ 44.998384] save_stack+0x45/0xd0 [ 45.001837] kasan_slab_free+0x75/0xc0 [ 45.005710] kmem_cache_free+0x83/0x2b0 [ 45.009669] kfree_skbmem+0x8d/0x120 [ 45.013376] __kfree_skb+0x1e/0x30 [ 45.016913] tcp_remove_empty_skb.part.0+0x231/0x2e0 [ 45.021998] tcp_sendmsg_locked+0x1ced/0x3200 [ 45.026496] tcp_sendmsg+0x30/0x50 [ 45.030034] inet_sendmsg+0x122/0x500 [ 45.033839] sock_sendmsg+0xce/0x110 [ 45.037551] SYSC_sendto+0x206/0x310 [ 45.041257] SyS_sendto+0x40/0x50 [ 45.044712] do_syscall_64+0x1e8/0x640 [ 45.048581] entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 45.053750] [ 45.055395] The buggy address belongs to the object at ffff888097f84d40 [ 45.055395] which belongs to the cache skbuff_fclone_cache of size 472 [ 45.068732] The buggy address is located 48 bytes inside of [ 45.068732] 472-byte region [ffff888097f84d40, ffff888097f84f18) [ 45.080522] The buggy address belongs to the page: [ 45.085446] page:ffffea00025fe100 count:1 mapcount:0 mapping:ffff888097f840c0 index:0x0 [ 45.093574] flags: 0x1fffc0000000100(slab) [ 45.097791] raw: 01fffc0000000100 ffff888097f840c0 0000000000000000 0000000100000006 [ 45.105674] raw: ffffea00027feca0 ffff8880a9e1bc48 ffff8880a9e19a80 0000000000000000 [ 45.113539] page dumped because: kasan: bad access detected [ 45.119230] [ 45.120848] Memory state around the buggy address: [ 45.125785] ffff888097f84c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 45.133128] ffff888097f84c80: 00 00 00 fc fc fc fc fc fc fc fc fc fc fc fc fc [ 45.140478] >ffff888097f84d00: fc fc fc fc fc fc fc fc fb fb fb fb fb fb fb fb [ 45.147827] ^ [ 45.154851] ffff888097f84d80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 45.162288] ffff888097f84e00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 45.169660] ================================================================== [ 45.177003] Disabling lock debugging due to kernel taint [ 45.182755] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 45.190175] Kernel panic - not syncing: panic_on_warn set ... [ 45.190175] [ 45.197671] CPU: 0 PID: 7026 Comm: syz-executor344 Tainted: G B 4.14.145 #0 [ 45.205882] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 45.215245] Call Trace: [ 45.217818] dump_stack+0x138/0x197 [ 45.221428] ? tcp_init_tso_segs+0x1ae/0x200 [ 45.225818] panic+0x1f2/0x426 [ 45.228997] ? add_taint.cold+0x16/0x16 [ 45.232982] ? ___preempt_schedule+0x16/0x18 [ 45.237376] kasan_end_report+0x47/0x4f [ 45.241346] kasan_report.cold+0x130/0x2af [ 45.245562] __asan_report_load2_noabort+0x14/0x20 [ 45.250472] tcp_init_tso_segs+0x1ae/0x200 [ 45.254690] ? tcp_tso_segs+0x7d/0x1c0 [ 45.258574] tcp_write_xmit+0x15e/0x4960 [ 45.262618] ? tcp_v4_md5_lookup+0x23/0x30 [ 45.266840] ? tcp_established_options+0x2c5/0x420 [ 45.271752] ? tcp_current_mss+0x1dc/0x2f0 [ 45.275968] ? __alloc_skb+0x3ee/0x500 [ 45.279855] __tcp_push_pending_frames+0xa6/0x260 [ 45.284678] tcp_send_fin+0x17e/0xc40 [ 45.288472] tcp_close+0xcc8/0xfb0 [ 45.291994] ? __sock_release+0x89/0x2b0 [ 45.296043] ? ip_mc_drop_socket+0x1d6/0x230 [ 45.300442] inet_release+0xec/0x1c0 [ 45.304145] __sock_release+0xce/0x2b0 [ 45.308051] ? __sock_release+0x2b0/0x2b0 [ 45.312201] sock_close+0x1b/0x30 [ 45.315647] __fput+0x275/0x7a0 [ 45.318914] ____fput+0x16/0x20 [ 45.322176] task_work_run+0x114/0x190 [ 45.326048] do_exit+0x7df/0x2c10 [ 45.329486] ? mm_update_next_owner+0x5d0/0x5d0 [ 45.334137] ? up_read+0x1a/0x40 [ 45.337501] ? __do_page_fault+0x358/0xb80 [ 45.341735] do_group_exit+0x111/0x330 [ 45.345630] SyS_exit_group+0x1d/0x20 [ 45.349425] ? do_group_exit+0x330/0x330 [ 45.353481] do_syscall_64+0x1e8/0x640 [ 45.357363] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 45.362206] entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 45.367379] RIP: 0033:0x440618 [ 45.370567] RSP: 002b:00007ffdd2788668 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 45.378252] RAX: ffffffffffffffda RBX: 0000000000000001 RCX: 0000000000440618 [ 45.385503] RDX: 0000000000000001 RSI: 000000000000003c RDI: 0000000000000001 [ 45.392755] RBP: 00000000004c6970 R08: 00000000000000e7 R09: ffffffffffffffd0 [ 45.400005] R10: 0000000020000800 R11: 0000000000000246 R12: 0000000000000001 [ 45.407282] R13: 00000000006d95e0 R14: 0000000000000000 R15: 0000000000000000 [ 45.415969] Kernel Offset: disabled [ 45.419596] Rebooting in 86400 seconds..