[ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... Starting Load/Save RF Kill Switch Status... [ OK ] Started Update UTMP about System Runlevel Changes. [ OK ] Started Load/Save RF Kill Switch Status. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.64' (ECDSA) to the list of known hosts. 2020/04/03 15:35:42 parsed 1 programs 2020/04/03 15:35:44 executed programs: 0 syzkaller login: [ 45.422714] audit: type=1400 audit(1585928144.151:8): avc: denied { execmem } for pid=6454 comm="syz-executor.0" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=process permissive=1 [ 45.460144] IPVS: ftp: loaded support on port[0] = 21 [ 45.550483] chnl_net:caif_netlink_parms(): no params data found [ 45.616774] bridge0: port 1(bridge_slave_0) entered blocking state [ 45.623796] bridge0: port 1(bridge_slave_0) entered disabled state [ 45.631274] device bridge_slave_0 entered promiscuous mode [ 45.640911] bridge0: port 2(bridge_slave_1) entered blocking state [ 45.647948] bridge0: port 2(bridge_slave_1) entered disabled state [ 45.655457] device bridge_slave_1 entered promiscuous mode [ 45.675460] bond0: Enslaving bond_slave_0 as an active interface with an up link [ 45.685263] bond0: Enslaving bond_slave_1 as an active interface with an up link [ 45.705418] IPv6: ADDRCONF(NETDEV_UP): team_slave_0: link is not ready [ 45.714711] team0: Port device team_slave_0 added [ 45.720326] IPv6: ADDRCONF(NETDEV_UP): team_slave_1: link is not ready [ 45.728566] team0: Port device team_slave_1 added [ 45.754154] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 45.760432] batman_adv: batadv0: The MTU of interface batadv_slave_0 is too small (1500) to handle the transport of batman-adv packets. Packets going over this interface will be fragmented on layer2 which could impact the performance. Setting the MTU to 1560 would solve the problem. [ 45.788734] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 45.801250] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 45.808096] batman_adv: batadv0: The MTU of interface batadv_slave_1 is too small (1500) to handle the transport of batman-adv packets. Packets going over this interface will be fragmented on layer2 which could impact the performance. Setting the MTU to 1560 would solve the problem. [ 45.834394] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 45.845781] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_0: link is not ready [ 45.854017] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_1: link is not ready [ 45.916447] device hsr_slave_0 entered promiscuous mode [ 45.963511] device hsr_slave_1 entered promiscuous mode [ 46.003893] IPv6: ADDRCONF(NETDEV_UP): hsr_slave_0: link is not ready [ 46.011078] IPv6: ADDRCONF(NETDEV_UP): hsr_slave_1: link is not ready [ 46.086146] bridge0: port 2(bridge_slave_1) entered blocking state [ 46.092708] bridge0: port 2(bridge_slave_1) entered forwarding state [ 46.099807] bridge0: port 1(bridge_slave_0) entered blocking state [ 46.106299] bridge0: port 1(bridge_slave_0) entered forwarding state [ 46.145710] IPv6: ADDRCONF(NETDEV_UP): bond0: link is not ready [ 46.151861] 8021q: adding VLAN 0 to HW filter on device bond0 [ 46.161123] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 46.171745] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 46.180665] bridge0: port 1(bridge_slave_0) entered disabled state [ 46.198501] bridge0: port 2(bridge_slave_1) entered disabled state [ 46.207056] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 46.219847] IPv6: ADDRCONF(NETDEV_UP): team0: link is not ready [ 46.226161] 8021q: adding VLAN 0 to HW filter on device team0 [ 46.236051] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 46.244945] bridge0: port 1(bridge_slave_0) entered blocking state [ 46.251352] bridge0: port 1(bridge_slave_0) entered forwarding state [ 46.263554] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 46.271231] bridge0: port 2(bridge_slave_1) entered blocking state [ 46.277695] bridge0: port 2(bridge_slave_1) entered forwarding state [ 46.295483] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 46.311754] hsr0: Slave A (hsr_slave_0) is not up; please bring it up to get a fully working HSR network [ 46.321978] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network [ 46.335874] IPv6: ADDRCONF(NETDEV_UP): hsr0: link is not ready [ 46.342657] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 46.350505] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 46.358426] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 46.366411] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 46.374638] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 46.387960] IPv6: ADDRCONF(NETDEV_UP): vxcan0: link is not ready [ 46.396025] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 46.402688] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 46.414979] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 46.428288] IPv6: ADDRCONF(NETDEV_UP): veth0_virt_wifi: link is not ready [ 46.438488] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 46.478354] IPv6: ADDRCONF(NETDEV_UP): veth0_vlan: link is not ready [ 46.486349] IPv6: ADDRCONF(NETDEV_UP): vlan0: link is not ready [ 46.494519] IPv6: ADDRCONF(NETDEV_UP): vlan1: link is not ready [ 46.505023] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 46.512470] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 46.520260] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 46.530654] device veth0_vlan entered promiscuous mode [ 46.540227] device veth1_vlan entered promiscuous mode [ 46.556056] IPv6: ADDRCONF(NETDEV_UP): veth0_macvtap: link is not ready [ 46.566679] IPv6: ADDRCONF(NETDEV_UP): veth1_macvtap: link is not ready [ 46.574973] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_macvtap: link becomes ready [ 46.585130] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 46.595462] device veth0_macvtap entered promiscuous mode [ 46.601607] IPv6: ADDRCONF(NETDEV_UP): macvtap0: link is not ready [ 46.612169] device veth1_macvtap entered promiscuous mode [ 46.619737] IPv6: ADDRCONF(NETDEV_UP): macsec0: link is not ready [ 46.628773] IPv6: ADDRCONF(NETDEV_UP): veth0_to_batadv: link is not ready [ 46.639599] IPv6: ADDRCONF(NETDEV_UP): veth1_to_batadv: link is not ready [ 46.649933] IPv6: ADDRCONF(NETDEV_UP): batadv_slave_0: link is not ready [ 46.657711] batman_adv: batadv0: Interface activated: batadv_slave_0 [ 46.666002] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready [ 46.674071] IPv6: ADDRCONF(NETDEV_CHANGE): macsec0: link becomes ready [ 46.681132] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_0: link becomes ready [ 46.689711] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 46.700408] IPv6: ADDRCONF(NETDEV_UP): batadv_slave_1: link is not ready [ 46.707440] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 46.714978] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready [ 46.723318] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 47.335422] ================================================================== [ 47.343184] BUG: KASAN: use-after-free in __list_add_valid+0x93/0xa0 [ 47.349684] Read of size 8 at addr ffff888090c1ca60 by task syz-executor.0/6775 [ 47.357215] [ 47.358841] CPU: 0 PID: 6775 Comm: syz-executor.0 Not tainted 4.19.114-syzkaller #0 [ 47.366619] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 47.375961] Call Trace: [ 47.378546] dump_stack+0x188/0x20d [ 47.382182] ? __list_add_valid+0x93/0xa0 [ 47.386330] print_address_description.cold+0x7c/0x212 [ 47.391614] ? __list_add_valid+0x93/0xa0 [ 47.395760] kasan_report.cold+0x88/0x2b9 [ 47.399913] __list_add_valid+0x93/0xa0 [ 47.403882] rdma_listen+0x609/0x880 [ 47.407586] ucma_listen+0x14d/0x1c0 [ 47.411286] ? ucma_notify+0x190/0x190 [ 47.415169] ? __might_fault+0x192/0x1d0 [ 47.419286] ? _copy_from_user+0xd2/0x140 [ 47.423421] ? ucma_notify+0x190/0x190 [ 47.427303] ucma_write+0x285/0x350 [ 47.430919] ? ucma_open+0x280/0x280 [ 47.434620] ? __fget+0x319/0x510 [ 47.438062] __vfs_write+0xf7/0x760 [ 47.441761] ? ucma_open+0x280/0x280 [ 47.445464] ? kernel_read+0x110/0x110 [ 47.449346] ? __inode_security_revalidate+0xd3/0x120 [ 47.454674] ? avc_policy_seqno+0x9/0x70 [ 47.458741] ? selinux_file_permission+0x87/0x520 [ 47.463591] ? security_file_permission+0x84/0x220 [ 47.468538] vfs_write+0x206/0x550 [ 47.472070] ksys_write+0x12b/0x2a0 [ 47.475688] ? __ia32_sys_read+0xb0/0xb0 [ 47.479739] ? __ia32_sys_clock_settime+0x260/0x260 [ 47.484758] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 47.489510] ? trace_hardirqs_off_caller+0x55/0x210 [ 47.494520] ? do_syscall_64+0x21/0x620 [ 47.498500] do_syscall_64+0xf9/0x620 [ 47.502303] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 47.507487] RIP: 0033:0x45c849 [ 47.510668] Code: ad b6 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 7b b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00 [ 47.529779] RSP: 002b:00007fa0e08edc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 [ 47.537486] RAX: ffffffffffffffda RBX: 00007fa0e08ee6d4 RCX: 000000000045c849 [ 47.544788] RDX: 0000000000000010 RSI: 0000000020000040 RDI: 0000000000000003 [ 47.552084] RBP: 000000000076bf00 R08: 0000000000000000 R09: 0000000000000000 [ 47.559350] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff [ 47.566609] R13: 0000000000000cc0 R14: 00000000004cee4e R15: 000000000076bf0c [ 47.573875] [ 47.575489] Allocated by task 6767: [ 47.579105] kasan_kmalloc+0xbf/0xe0 [ 47.582815] kmem_cache_alloc_trace+0x14d/0x7a0 [ 47.587479] __rdma_create_id+0x5b/0x630 [ 47.591526] ucma_create_id+0x1cb/0x5a0 [ 47.595485] ucma_write+0x285/0x350 [ 47.599197] __vfs_write+0xf7/0x760 [ 47.602814] vfs_write+0x206/0x550 [ 47.606383] ksys_write+0x12b/0x2a0 [ 47.610007] do_syscall_64+0xf9/0x620 [ 47.613803] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 47.618995] [ 47.620616] Freed by task 6771: [ 47.623902] __kasan_slab_free+0xf7/0x140 [ 47.628037] kfree+0xce/0x220 [ 47.631132] ucma_close+0x10b/0x320 [ 47.634752] __fput+0x2cd/0x890 [ 47.638024] task_work_run+0x13f/0x1b0 [ 47.641944] get_signal+0x1b83/0x1f90 [ 47.645766] do_signal+0x8f/0x1710 [ 47.649297] exit_to_usermode_loop+0x22b/0x2b0 [ 47.653893] do_syscall_64+0x538/0x620 [ 47.657796] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 47.662970] [ 47.664585] The buggy address belongs to the object at ffff888090c1c880 [ 47.664585] which belongs to the cache kmalloc-2048 of size 2048 [ 47.677406] The buggy address is located 480 bytes inside of [ 47.677406] 2048-byte region [ffff888090c1c880, ffff888090c1d080) [ 47.689357] The buggy address belongs to the page: [ 47.694280] page:ffffea0002430700 count:1 mapcount:0 mapping:ffff88812c3dcc40 index:0x0 compound_mapcount: 0 [ 47.704237] flags: 0xfffe0000008100(slab|head) [ 47.708825] raw: 00fffe0000008100 ffffea0002531a08 ffffea000251ea88 ffff88812c3dcc40 [ 47.716709] raw: 0000000000000000 ffff888090c1c000 0000000100000003 0000000000000000 [ 47.724717] page dumped because: kasan: bad access detected [ 47.730412] [ 47.732041] Memory state around the buggy address: [ 47.736972] ffff888090c1c900: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 47.744332] ffff888090c1c980: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 47.751781] >ffff888090c1ca00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 47.759150] ^ [ 47.765628] ffff888090c1ca80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 47.772977] ffff888090c1cb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 47.780316] ================================================================== [ 47.787676] Disabling lock debugging due to kernel taint [ 47.802689] Kernel panic - not syncing: panic_on_warn set ... [ 47.802689] [ 47.810114] CPU: 1 PID: 6775 Comm: syz-executor.0 Tainted: G B 4.19.114-syzkaller #0 [ 47.819307] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 47.828673] Call Trace: [ 47.831335] dump_stack+0x188/0x20d [ 47.834968] panic+0x26a/0x50e [ 47.838154] ? __warn_printk+0xf3/0xf3 [ 47.842037] ? preempt_schedule_common+0x4a/0xc0 [ 47.846824] ? __list_add_valid+0x93/0xa0 [ 47.851000] ? ___preempt_schedule+0x16/0x18 [ 47.855395] ? trace_hardirqs_on+0x55/0x210 [ 47.859719] ? __list_add_valid+0x93/0xa0 [ 47.863912] kasan_end_report+0x43/0x49 [ 47.867946] kasan_report.cold+0xa4/0x2b9 [ 47.872188] __list_add_valid+0x93/0xa0 [ 47.876164] rdma_listen+0x609/0x880 [ 47.879873] ucma_listen+0x14d/0x1c0 [ 47.883592] ? ucma_notify+0x190/0x190 [ 47.887515] ? __might_fault+0x192/0x1d0 [ 47.891612] ? _copy_from_user+0xd2/0x140 [ 47.895755] ? ucma_notify+0x190/0x190 [ 47.899646] ucma_write+0x285/0x350 [ 47.903278] ? ucma_open+0x280/0x280 [ 47.906982] ? __fget+0x319/0x510 [ 47.910445] __vfs_write+0xf7/0x760 [ 47.914064] ? ucma_open+0x280/0x280 [ 47.917795] ? kernel_read+0x110/0x110 [ 47.921768] ? __inode_security_revalidate+0xd3/0x120 [ 47.926993] ? avc_policy_seqno+0x9/0x70 [ 47.931061] ? selinux_file_permission+0x87/0x520 [ 47.935954] ? security_file_permission+0x84/0x220 [ 47.940961] vfs_write+0x206/0x550 [ 47.944641] ksys_write+0x12b/0x2a0 [ 47.948264] ? __ia32_sys_read+0xb0/0xb0 [ 47.952368] ? __ia32_sys_clock_settime+0x260/0x260 [ 47.957374] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 47.962115] ? trace_hardirqs_off_caller+0x55/0x210 [ 47.967130] ? do_syscall_64+0x21/0x620 [ 47.971097] do_syscall_64+0xf9/0x620 [ 47.974892] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 47.980082] RIP: 0033:0x45c849 [ 47.983275] Code: ad b6 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 7b b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00 [ 48.002160] RSP: 002b:00007fa0e08edc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 [ 48.009876] RAX: ffffffffffffffda RBX: 00007fa0e08ee6d4 RCX: 000000000045c849 [ 48.017391] RDX: 0000000000000010 RSI: 0000000020000040 RDI: 0000000000000003 [ 48.024643] RBP: 000000000076bf00 R08: 0000000000000000 R09: 0000000000000000 [ 48.031908] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff [ 48.039158] R13: 0000000000000cc0 R14: 00000000004cee4e R15: 000000000076bf0c [ 48.047813] Kernel Offset: disabled [ 48.051453] Rebooting in 86400 seconds..