[ 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 '10.128.0.157' (ECDSA) to the list of known hosts. 2020/04/15 01:04:03 parsed 1 programs 2020/04/15 01:04:04 executed programs: 0 syzkaller login: [ 37.909936] audit: type=1400 audit(1586912644.879:8): avc: denied { execmem } for pid=6362 comm="syz-executor.0" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=process permissive=1 [ 38.195275] IPVS: ftp: loaded support on port[0] = 21 [ 39.015457] chnl_net:caif_netlink_parms(): no params data found [ 39.096957] bridge0: port 1(bridge_slave_0) entered blocking state [ 39.103507] bridge0: port 1(bridge_slave_0) entered disabled state [ 39.111759] device bridge_slave_0 entered promiscuous mode [ 39.120007] bridge0: port 2(bridge_slave_1) entered blocking state [ 39.126836] bridge0: port 2(bridge_slave_1) entered disabled state [ 39.134363] device bridge_slave_1 entered promiscuous mode [ 39.151603] bond0: Enslaving bond_slave_0 as an active interface with an up link [ 39.160512] bond0: Enslaving bond_slave_1 as an active interface with an up link [ 39.180508] IPv6: ADDRCONF(NETDEV_UP): team_slave_0: link is not ready [ 39.188704] team0: Port device team_slave_0 added [ 39.194930] IPv6: ADDRCONF(NETDEV_UP): team_slave_1: link is not ready [ 39.202664] team0: Port device team_slave_1 added [ 39.218841] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 39.225254] 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. [ 39.251182] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 39.263120] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 39.270068] 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. [ 39.295873] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 39.306880] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_0: link is not ready [ 39.314803] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_1: link is not ready [ 39.376159] device hsr_slave_0 entered promiscuous mode [ 39.413882] device hsr_slave_1 entered promiscuous mode [ 39.464443] IPv6: ADDRCONF(NETDEV_UP): hsr_slave_0: link is not ready [ 39.471501] IPv6: ADDRCONF(NETDEV_UP): hsr_slave_1: link is not ready [ 39.538267] bridge0: port 2(bridge_slave_1) entered blocking state [ 39.544719] bridge0: port 2(bridge_slave_1) entered forwarding state [ 39.551489] bridge0: port 1(bridge_slave_0) entered blocking state [ 39.557892] bridge0: port 1(bridge_slave_0) entered forwarding state [ 39.590024] IPv6: ADDRCONF(NETDEV_UP): bond0: link is not ready [ 39.597374] 8021q: adding VLAN 0 to HW filter on device bond0 [ 39.605861] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 39.615289] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 39.623227] bridge0: port 1(bridge_slave_0) entered disabled state [ 39.640471] bridge0: port 2(bridge_slave_1) entered disabled state [ 39.651518] IPv6: ADDRCONF(NETDEV_UP): team0: link is not ready [ 39.657802] 8021q: adding VLAN 0 to HW filter on device team0 [ 39.666668] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 39.674864] bridge0: port 1(bridge_slave_0) entered blocking state [ 39.681196] bridge0: port 1(bridge_slave_0) entered forwarding state [ 39.691145] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 39.699694] bridge0: port 2(bridge_slave_1) entered blocking state [ 39.706123] bridge0: port 2(bridge_slave_1) entered forwarding state [ 39.724915] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 39.732509] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 39.741714] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 39.750739] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 39.760635] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 39.769650] IPv6: ADDRCONF(NETDEV_UP): hsr0: link is not ready [ 39.775937] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 39.789036] IPv6: ADDRCONF(NETDEV_UP): vxcan0: link is not ready [ 39.796697] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 39.804079] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 39.814675] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 39.868086] IPv6: ADDRCONF(NETDEV_UP): veth0_virt_wifi: link is not ready [ 39.878073] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 39.909725] IPv6: ADDRCONF(NETDEV_UP): veth0_vlan: link is not ready [ 39.917226] IPv6: ADDRCONF(NETDEV_UP): vlan0: link is not ready [ 39.925137] IPv6: ADDRCONF(NETDEV_UP): vlan1: link is not ready [ 39.934953] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 39.942312] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 39.950837] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 39.959612] device veth0_vlan entered promiscuous mode [ 39.968496] device veth1_vlan entered promiscuous mode [ 39.975145] IPv6: ADDRCONF(NETDEV_UP): macvlan0: link is not ready [ 39.983936] IPv6: ADDRCONF(NETDEV_UP): macvlan1: link is not ready [ 39.995333] IPv6: ADDRCONF(NETDEV_UP): veth0_macvtap: link is not ready [ 40.004994] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 40.012154] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan0: link becomes ready [ 40.019750] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan1: link becomes ready [ 40.027056] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 40.037322] device veth0_macvtap entered promiscuous mode [ 40.046601] device veth1_macvtap entered promiscuous mode [ 40.055464] IPv6: ADDRCONF(NETDEV_UP): veth0_to_batadv: link is not ready [ 40.066151] IPv6: ADDRCONF(NETDEV_UP): veth1_to_batadv: link is not ready [ 40.075632] IPv6: ADDRCONF(NETDEV_UP): batadv_slave_0: link is not ready [ 40.082695] batman_adv: batadv0: Interface activated: batadv_slave_0 [ 40.091229] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_0: link becomes ready [ 40.099763] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 40.110745] IPv6: ADDRCONF(NETDEV_UP): batadv_slave_1: link is not ready [ 40.117672] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 40.124317] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready [ 40.132020] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 41.546838] ================================================================== [ 41.554298] BUG: KASAN: use-after-free in __list_add_valid+0x93/0xa0 [ 41.560776] Read of size 8 at addr ffff888094a9c698 by task syz-executor.0/6614 [ 41.569158] [ 41.570769] CPU: 0 PID: 6614 Comm: syz-executor.0 Not tainted 4.14.176-syzkaller #0 [ 41.578551] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 41.587899] Call Trace: [ 41.590478] dump_stack+0x13e/0x194 [ 41.594098] ? __list_add_valid+0x93/0xa0 [ 41.598235] print_address_description.cold+0x7c/0x1e2 [ 41.603492] ? __list_add_valid+0x93/0xa0 [ 41.607620] kasan_report.cold+0xa9/0x2ae [ 41.611754] __list_add_valid+0x93/0xa0 [ 41.615708] rdma_listen+0x580/0x800 [ 41.619401] ucma_listen+0x10b/0x160 [ 41.623091] ? ucma_accept+0x2a0/0x2a0 [ 41.626963] ? _copy_from_user+0x94/0x100 [ 41.631088] ? ucma_accept+0x2a0/0x2a0 [ 41.634954] ucma_write+0x206/0x2c0 [ 41.638561] ? ucma_open+0x280/0x280 [ 41.642260] ? save_trace+0x290/0x290 [ 41.646049] __vfs_write+0xe4/0x630 [ 41.649656] ? ucma_open+0x280/0x280 [ 41.653348] ? kernel_read+0x110/0x110 [ 41.657229] ? __inode_security_revalidate+0xcf/0x120 [ 41.662487] ? avc_policy_seqno+0x5/0x10 [ 41.666532] ? selinux_file_permission+0x7a/0x440 [ 41.671369] ? security_file_permission+0x82/0x1e0 [ 41.676300] ? rw_verify_area+0xe1/0x2a0 [ 41.680358] vfs_write+0x192/0x4e0 [ 41.683893] SyS_write+0xf2/0x210 [ 41.687608] ? SyS_read+0x210/0x210 [ 41.691235] ? SyS_clock_settime+0x1a0/0x1a0 [ 41.695634] ? do_syscall_64+0x4c/0x640 [ 41.699607] ? SyS_read+0x210/0x210 [ 41.703223] do_syscall_64+0x1d5/0x640 [ 41.707098] entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 41.712285] RIP: 0033:0x45c889 [ 41.715455] RSP: 002b:00007f6ce6dd1c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 [ 41.723149] RAX: ffffffffffffffda RBX: 00007f6ce6dd26d4 RCX: 000000000045c889 [ 41.730414] RDX: 0000000000000010 RSI: 0000000020000380 RDI: 0000000000000003 [ 41.737668] RBP: 000000000076bfa0 R08: 0000000000000000 R09: 0000000000000000 [ 41.744924] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff [ 41.752186] R13: 0000000000000cc2 R14: 00000000004ceeb6 R15: 000000000076bfac [ 41.759999] [ 41.761627] Allocated by task 6601: [ 41.765259] save_stack+0x32/0xa0 [ 41.768784] kasan_kmalloc+0xbf/0xe0 [ 41.772767] kmem_cache_alloc_trace+0x14d/0x7b0 [ 41.777430] rdma_create_id+0x57/0x4c0 [ 41.781315] ucma_create_id+0x18b/0x500 [ 41.785266] ucma_write+0x206/0x2c0 [ 41.788883] __vfs_write+0xe4/0x630 [ 41.792500] vfs_write+0x192/0x4e0 [ 41.796034] SyS_write+0xf2/0x210 [ 41.799481] do_syscall_64+0x1d5/0x640 [ 41.803350] entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 41.808672] [ 41.810295] Freed by task 6595: [ 41.813565] save_stack+0x32/0xa0 [ 41.817011] kasan_slab_free+0x75/0xc0 [ 41.821761] kfree+0xcb/0x260 [ 41.824848] ucma_close+0x105/0x300 [ 41.828469] __fput+0x25f/0x790 [ 41.831747] task_work_run+0x113/0x190 [ 41.835645] exit_to_usermode_loop+0x1d6/0x220 [ 41.840214] do_syscall_64+0x4a3/0x640 [ 41.844093] entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 41.849267] [ 41.850888] The buggy address belongs to the object at ffff888094a9c4c0 [ 41.850888] which belongs to the cache kmalloc-1024 of size 1024 [ 41.863712] The buggy address is located 472 bytes inside of [ 41.863712] 1024-byte region [ffff888094a9c4c0, ffff888094a9c8c0) [ 41.875662] The buggy address belongs to the page: [ 41.880658] page:ffffea000252a700 count:1 mapcount:0 mapping:ffff888094a9c040 index:0x0 compound_mapcount: 0 [ 41.890640] flags: 0xfffe0000008100(slab|head) [ 41.895297] raw: 00fffe0000008100 ffff888094a9c040 0000000000000000 0000000100000007 [ 41.903166] raw: ffffea000252aea0 ffffea000277f620 ffff88812fe56ac0 0000000000000000 [ 41.911059] page dumped because: kasan: bad access detected [ 41.916758] [ 41.918377] Memory state around the buggy address: [ 41.926787] ffff888094a9c580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 41.934138] ffff888094a9c600: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 41.941562] >ffff888094a9c680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 41.948924] ^ [ 41.954287] ffff888094a9c700: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 41.963125] ffff888094a9c780: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 41.970901] ================================================================== [ 41.978598] Disabling lock debugging due to kernel taint [ 41.994997] Kernel panic - not syncing: panic_on_warn set ... [ 41.994997] [ 42.002749] CPU: 1 PID: 6614 Comm: syz-executor.0 Tainted: G B 4.14.176-syzkaller #0 [ 42.011789] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 42.021281] Call Trace: [ 42.023869] dump_stack+0x13e/0x194 [ 42.027501] panic+0x1f9/0x42d [ 42.030721] ? add_taint.cold+0x16/0x16 [ 42.034735] ? preempt_schedule_common+0x4a/0xc0 [ 42.039731] ? __list_add_valid+0x93/0xa0 [ 42.043861] ? ___preempt_schedule+0x16/0x18 [ 42.048248] ? __list_add_valid+0x93/0xa0 [ 42.052385] kasan_end_report+0x43/0x49 [ 42.056458] kasan_report.cold+0x12f/0x2ae [ 42.060691] __list_add_valid+0x93/0xa0 [ 42.064650] rdma_listen+0x580/0x800 [ 42.068355] ucma_listen+0x10b/0x160 [ 42.072048] ? ucma_accept+0x2a0/0x2a0 [ 42.075958] ? _copy_from_user+0x94/0x100 [ 42.080124] ? ucma_accept+0x2a0/0x2a0 [ 42.084206] ucma_write+0x206/0x2c0 [ 42.087821] ? ucma_open+0x280/0x280 [ 42.091512] ? save_trace+0x290/0x290 [ 42.095291] __vfs_write+0xe4/0x630 [ 42.098905] ? ucma_open+0x280/0x280 [ 42.102597] ? kernel_read+0x110/0x110 [ 42.106466] ? __inode_security_revalidate+0xcf/0x120 [ 42.111637] ? avc_policy_seqno+0x5/0x10 [ 42.115695] ? selinux_file_permission+0x7a/0x440 [ 42.120518] ? security_file_permission+0x82/0x1e0 [ 42.125439] ? rw_verify_area+0xe1/0x2a0 [ 42.129481] vfs_write+0x192/0x4e0 [ 42.133003] SyS_write+0xf2/0x210 [ 42.136432] ? SyS_read+0x210/0x210 [ 42.140039] ? SyS_clock_settime+0x1a0/0x1a0 [ 42.144429] ? do_syscall_64+0x4c/0x640 [ 42.148391] ? SyS_read+0x210/0x210 [ 42.152009] do_syscall_64+0x1d5/0x640 [ 42.155901] entry_SYSCALL_64_after_hwframe+0x42/0xb7 [ 42.161071] RIP: 0033:0x45c889 [ 42.164251] RSP: 002b:00007f6ce6dd1c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 [ 42.171940] RAX: ffffffffffffffda RBX: 00007f6ce6dd26d4 RCX: 000000000045c889 [ 42.179205] RDX: 0000000000000010 RSI: 0000000020000380 RDI: 0000000000000003 [ 42.186459] RBP: 000000000076bfa0 R08: 0000000000000000 R09: 0000000000000000 [ 42.193711] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff [ 42.200987] R13: 0000000000000cc2 R14: 00000000004ceeb6 R15: 000000000076bfac [ 42.209387] Kernel Offset: disabled [ 42.213009] Rebooting in 86400 seconds..