[ 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 '10.128.0.245' (ECDSA) to the list of known hosts. 2020/04/08 05:42:06 parsed 1 programs 2020/04/08 05:42:09 executed programs: 0 syzkaller login: [ 43.409448] audit: type=1400 audit(1586324529.117:8): avc: denied { execmem } for pid=6472 comm="syz-executor.0" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=process permissive=1 [ 43.439903] IPVS: ftp: loaded support on port[0] = 21 [ 43.530156] chnl_net:caif_netlink_parms(): no params data found [ 43.611105] bridge0: port 1(bridge_slave_0) entered blocking state [ 43.617936] bridge0: port 1(bridge_slave_0) entered disabled state [ 43.625120] device bridge_slave_0 entered promiscuous mode [ 43.633862] bridge0: port 2(bridge_slave_1) entered blocking state [ 43.640911] bridge0: port 2(bridge_slave_1) entered disabled state [ 43.648531] device bridge_slave_1 entered promiscuous mode [ 43.667652] bond0: Enslaving bond_slave_0 as an active interface with an up link [ 43.677908] bond0: Enslaving bond_slave_1 as an active interface with an up link [ 43.697197] IPv6: ADDRCONF(NETDEV_UP): team_slave_0: link is not ready [ 43.704592] team0: Port device team_slave_0 added [ 43.711389] IPv6: ADDRCONF(NETDEV_UP): team_slave_1: link is not ready [ 43.719124] team0: Port device team_slave_1 added [ 43.735270] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 43.741625] 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. [ 43.767745] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 43.779845] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 43.786946] 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. [ 43.812962] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 43.823939] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_0: link is not ready [ 43.831718] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_1: link is not ready [ 43.889157] device hsr_slave_0 entered promiscuous mode [ 43.946257] device hsr_slave_1 entered promiscuous mode [ 43.986628] IPv6: ADDRCONF(NETDEV_UP): hsr_slave_0: link is not ready [ 43.993732] IPv6: ADDRCONF(NETDEV_UP): hsr_slave_1: link is not ready [ 44.066531] bridge0: port 2(bridge_slave_1) entered blocking state [ 44.073041] bridge0: port 2(bridge_slave_1) entered forwarding state [ 44.080010] bridge0: port 1(bridge_slave_0) entered blocking state [ 44.086468] bridge0: port 1(bridge_slave_0) entered forwarding state [ 44.120468] IPv6: ADDRCONF(NETDEV_UP): bond0: link is not ready [ 44.128983] 8021q: adding VLAN 0 to HW filter on device bond0 [ 44.137466] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 44.146507] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 44.165225] bridge0: port 1(bridge_slave_0) entered disabled state [ 44.172792] bridge0: port 2(bridge_slave_1) entered disabled state [ 44.181765] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 44.192510] IPv6: ADDRCONF(NETDEV_UP): team0: link is not ready [ 44.198975] 8021q: adding VLAN 0 to HW filter on device team0 [ 44.208570] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 44.216440] bridge0: port 1(bridge_slave_0) entered blocking state [ 44.222793] bridge0: port 1(bridge_slave_0) entered forwarding state [ 44.233767] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 44.241557] bridge0: port 2(bridge_slave_1) entered blocking state [ 44.247953] bridge0: port 2(bridge_slave_1) entered forwarding state [ 44.264503] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 44.272908] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 44.283406] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 44.294268] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 44.306464] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network [ 44.318093] IPv6: ADDRCONF(NETDEV_UP): hsr0: link is not ready [ 44.324096] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 44.333035] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 44.347163] IPv6: ADDRCONF(NETDEV_UP): vxcan0: link is not ready [ 44.354538] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 44.362132] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 44.373313] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 44.387077] IPv6: ADDRCONF(NETDEV_UP): veth0_virt_wifi: link is not ready [ 44.397148] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 44.428970] IPv6: ADDRCONF(NETDEV_UP): veth0_vlan: link is not ready [ 44.436380] IPv6: ADDRCONF(NETDEV_UP): vlan0: link is not ready [ 44.442908] IPv6: ADDRCONF(NETDEV_UP): vlan1: link is not ready [ 44.452946] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 44.461171] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 44.468690] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 44.477947] device veth0_vlan entered promiscuous mode [ 44.487830] device veth1_vlan entered promiscuous mode [ 44.493674] IPv6: ADDRCONF(NETDEV_UP): macvlan0: link is not ready [ 44.502812] IPv6: ADDRCONF(NETDEV_UP): macvlan1: link is not ready [ 44.515023] IPv6: ADDRCONF(NETDEV_UP): veth0_macvtap: link is not ready [ 44.523235] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan0: link becomes ready [ 44.530890] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan1: link becomes ready [ 44.541149] IPv6: ADDRCONF(NETDEV_UP): veth1_macvtap: link is not ready [ 44.548775] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_macvtap: link becomes ready [ 44.557697] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 44.568334] device veth0_macvtap entered promiscuous mode [ 44.574494] IPv6: ADDRCONF(NETDEV_UP): macvtap0: link is not ready [ 44.584201] device veth1_macvtap entered promiscuous mode [ 44.591194] IPv6: ADDRCONF(NETDEV_UP): macsec0: link is not ready [ 44.600442] IPv6: ADDRCONF(NETDEV_UP): veth0_to_batadv: link is not ready [ 44.610241] IPv6: ADDRCONF(NETDEV_UP): veth1_to_batadv: link is not ready [ 44.620202] IPv6: ADDRCONF(NETDEV_UP): batadv_slave_0: link is not ready [ 44.627958] batman_adv: batadv0: Interface activated: batadv_slave_0 [ 44.634638] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready [ 44.643123] IPv6: ADDRCONF(NETDEV_CHANGE): macsec0: link becomes ready [ 44.650837] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_0: link becomes ready [ 44.659038] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 44.670536] IPv6: ADDRCONF(NETDEV_UP): batadv_slave_1: link is not ready [ 44.677673] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 44.684228] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready [ 44.692218] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 44.912430] ================================================================== [ 44.919960] BUG: KASAN: use-after-free in __list_add_valid+0x93/0xa0 [ 44.926479] Read of size 8 at addr ffff888088013660 by task syz-executor.0/6720 [ 44.933908] [ 44.935525] CPU: 0 PID: 6720 Comm: syz-executor.0 Not tainted 4.19.114-syzkaller #0 [ 44.943294] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 44.952690] Call Trace: [ 44.955268] dump_stack+0x188/0x20d [ 44.958908] ? __list_add_valid+0x93/0xa0 [ 44.963058] print_address_description.cold+0x7c/0x212 [ 44.968336] ? __list_add_valid+0x93/0xa0 [ 44.972467] kasan_report.cold+0x88/0x2b9 [ 44.976603] __list_add_valid+0x93/0xa0 [ 44.980604] rdma_listen+0x609/0x880 [ 44.984339] ucma_listen+0x14d/0x1c0 [ 44.988044] ? ucma_notify+0x190/0x190 [ 44.991917] ? __might_fault+0x192/0x1d0 [ 44.995964] ? _copy_from_user+0xd2/0x140 [ 45.000095] ? ucma_notify+0x190/0x190 [ 45.003968] ucma_write+0x285/0x350 [ 45.007578] ? ucma_open+0x280/0x280 [ 45.011272] ? __fget+0x319/0x510 [ 45.014711] __vfs_write+0xf7/0x760 [ 45.018324] ? ucma_open+0x280/0x280 [ 45.022022] ? kernel_read+0x110/0x110 [ 45.025955] ? __inode_security_revalidate+0xd3/0x120 [ 45.031129] ? avc_policy_seqno+0x9/0x70 [ 45.035172] ? selinux_file_permission+0x87/0x520 [ 45.039998] ? security_file_permission+0x84/0x220 [ 45.044949] vfs_write+0x206/0x550 [ 45.048489] ksys_write+0x12b/0x2a0 [ 45.052105] ? __ia32_sys_read+0xb0/0xb0 [ 45.056194] ? __ia32_sys_clock_settime+0x260/0x260 [ 45.061202] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 45.065946] ? trace_hardirqs_off_caller+0x55/0x210 [ 45.070951] ? do_syscall_64+0x21/0x620 [ 45.074922] do_syscall_64+0xf9/0x620 [ 45.078713] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 45.083884] RIP: 0033:0x45c889 [ 45.087185] 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 [ 45.106070] RSP: 002b:00007f6fac74ec78 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 [ 45.113763] RAX: ffffffffffffffda RBX: 00007f6fac74f6d4 RCX: 000000000045c889 [ 45.121015] RDX: 0000000000000010 RSI: 00000000200001c0 RDI: 0000000000000003 [ 45.128267] RBP: 000000000076bf00 R08: 0000000000000000 R09: 0000000000000000 [ 45.135517] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff [ 45.142827] R13: 0000000000000cc0 R14: 00000000004cee8e R15: 000000000076bf0c [ 45.150096] [ 45.151714] Allocated by task 6718: [ 45.155328] kasan_kmalloc+0xbf/0xe0 [ 45.159025] kmem_cache_alloc_trace+0x14d/0x7a0 [ 45.163677] __rdma_create_id+0x5b/0x630 [ 45.167721] ucma_create_id+0x1cb/0x5a0 [ 45.171679] ucma_write+0x285/0x350 [ 45.175299] __vfs_write+0xf7/0x760 [ 45.178907] vfs_write+0x206/0x550 [ 45.182429] ksys_write+0x12b/0x2a0 [ 45.186038] do_syscall_64+0xf9/0x620 [ 45.189854] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 45.195022] [ 45.196634] Freed by task 6713: [ 45.199893] __kasan_slab_free+0xf7/0x140 [ 45.204021] kfree+0xce/0x220 [ 45.207108] ucma_close+0x10b/0x320 [ 45.210717] __fput+0x2cd/0x890 [ 45.213975] task_work_run+0x13f/0x1b0 [ 45.217842] exit_to_usermode_loop+0x25a/0x2b0 [ 45.222404] do_syscall_64+0x538/0x620 [ 45.226271] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 45.231436] [ 45.233044] The buggy address belongs to the object at ffff888088013480 [ 45.233044] which belongs to the cache kmalloc-2048 of size 2048 [ 45.245855] The buggy address is located 480 bytes inside of [ 45.245855] 2048-byte region [ffff888088013480, ffff888088013c80) [ 45.257839] The buggy address belongs to the page: [ 45.262757] page:ffffea0002200480 count:1 mapcount:0 mapping:ffff88812c3dcc40 index:0x0 compound_mapcount: 0 [ 45.272836] flags: 0xfffe0000008100(slab|head) [ 45.277409] raw: 00fffe0000008100 ffffea0002116c08 ffffea00027f6608 ffff88812c3dcc40 [ 45.285317] raw: 0000000000000000 ffff888088012380 0000000100000003 0000000000000000 [ 45.293220] page dumped because: kasan: bad access detected [ 45.298918] [ 45.300565] Memory state around the buggy address: [ 45.305476] ffff888088013500: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 45.312832] ffff888088013580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 45.320178] >ffff888088013600: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 45.327516] ^ [ 45.333989] ffff888088013680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 45.341330] ffff888088013700: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 45.348711] ================================================================== [ 45.356060] Disabling lock debugging due to kernel taint [ 45.368507] Kernel panic - not syncing: panic_on_warn set ... [ 45.368507] [ 45.375903] CPU: 0 PID: 6720 Comm: syz-executor.0 Tainted: G B 4.19.114-syzkaller #0 [ 45.385082] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 45.394429] Call Trace: [ 45.397022] dump_stack+0x188/0x20d [ 45.400664] panic+0x26a/0x50e [ 45.403840] ? __warn_printk+0xf3/0xf3 [ 45.407753] ? preempt_schedule_common+0x4a/0xc0 [ 45.412496] ? __list_add_valid+0x93/0xa0 [ 45.416633] ? ___preempt_schedule+0x16/0x18 [ 45.421067] ? trace_hardirqs_on+0x55/0x210 [ 45.425389] ? __list_add_valid+0x93/0xa0 [ 45.429534] kasan_end_report+0x43/0x49 [ 45.433493] kasan_report.cold+0xa4/0x2b9 [ 45.437626] __list_add_valid+0x93/0xa0 [ 45.441622] rdma_listen+0x609/0x880 [ 45.445331] ucma_listen+0x14d/0x1c0 [ 45.449039] ? ucma_notify+0x190/0x190 [ 45.452912] ? __might_fault+0x192/0x1d0 [ 45.456985] ? _copy_from_user+0xd2/0x140 [ 45.461158] ? ucma_notify+0x190/0x190 [ 45.465030] ucma_write+0x285/0x350 [ 45.468652] ? ucma_open+0x280/0x280 [ 45.472350] ? __fget+0x319/0x510 [ 45.475824] __vfs_write+0xf7/0x760 [ 45.479432] ? ucma_open+0x280/0x280 [ 45.483136] ? kernel_read+0x110/0x110 [ 45.487014] ? __inode_security_revalidate+0xd3/0x120 [ 45.492185] ? avc_policy_seqno+0x9/0x70 [ 45.496230] ? selinux_file_permission+0x87/0x520 [ 45.501054] ? security_file_permission+0x84/0x220 [ 45.505967] vfs_write+0x206/0x550 [ 45.509507] ksys_write+0x12b/0x2a0 [ 45.514074] ? __ia32_sys_read+0xb0/0xb0 [ 45.518116] ? __ia32_sys_clock_settime+0x260/0x260 [ 45.523113] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 45.527871] ? trace_hardirqs_off_caller+0x55/0x210 [ 45.532875] ? do_syscall_64+0x21/0x620 [ 45.536832] do_syscall_64+0xf9/0x620 [ 45.540617] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 45.545795] RIP: 0033:0x45c889 [ 45.548986] 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 [ 45.567874] RSP: 002b:00007f6fac74ec78 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 [ 45.575567] RAX: ffffffffffffffda RBX: 00007f6fac74f6d4 RCX: 000000000045c889 [ 45.582814] RDX: 0000000000000010 RSI: 00000000200001c0 RDI: 0000000000000003 [ 45.590071] RBP: 000000000076bf00 R08: 0000000000000000 R09: 0000000000000000 [ 45.597329] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff [ 45.604582] R13: 0000000000000cc0 R14: 00000000004cee8e R15: 000000000076bf0c [ 45.613324] Kernel Offset: disabled [ 45.616964] Rebooting in 86400 seconds..