[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 85.655629][ T27] audit: type=1800 audit(1583330572.797:25): pid=9482 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 85.689992][ T27] audit: type=1800 audit(1583330572.807:26): pid=9482 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 85.740627][ T27] audit: type=1800 audit(1583330572.807:27): pid=9482 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="restorecond" dev="sda1" ino=2436 res=0 [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.15.203' (ECDSA) to the list of known hosts. 2020/03/04 14:18:30 parsed 1 programs syzkaller login: [ 1024.003565][ T9652] as (9652) used greatest stack depth: 22824 bytes left 2020/03/04 14:18:31 executed programs: 0 [ 1024.784739][ T9658] IPVS: ftp: loaded support on port[0] = 21 [ 1024.843767][ T9658] chnl_net:caif_netlink_parms(): no params data found [ 1024.883077][ T9658] bridge0: port 1(bridge_slave_0) entered blocking state [ 1024.891082][ T9658] bridge0: port 1(bridge_slave_0) entered disabled state [ 1024.899133][ T9658] device bridge_slave_0 entered promiscuous mode [ 1024.908018][ T9658] bridge0: port 2(bridge_slave_1) entered blocking state [ 1024.915301][ T9658] bridge0: port 2(bridge_slave_1) entered disabled state [ 1024.923338][ T9658] device bridge_slave_1 entered promiscuous mode [ 1024.941007][ T9658] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 1024.952010][ T9658] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 1024.971181][ T9658] team0: Port device team_slave_0 added [ 1024.978487][ T9658] team0: Port device team_slave_1 added [ 1024.994180][ T9658] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 1025.001239][ T9658] 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. [ 1025.027187][ T9658] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 1025.039472][ T9658] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 1025.046553][ T9658] 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. [ 1025.072625][ T9658] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 1025.152839][ T9658] device hsr_slave_0 entered promiscuous mode [ 1025.190207][ T9658] device hsr_slave_1 entered promiscuous mode [ 1025.312756][ T9658] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 1025.372692][ T9658] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 1025.422967][ T9658] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 1025.482543][ T9658] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 1025.535703][ T9658] bridge0: port 2(bridge_slave_1) entered blocking state [ 1025.543025][ T9658] bridge0: port 2(bridge_slave_1) entered forwarding state [ 1025.550969][ T9658] bridge0: port 1(bridge_slave_0) entered blocking state [ 1025.558156][ T9658] bridge0: port 1(bridge_slave_0) entered forwarding state [ 1025.603277][ T9658] 8021q: adding VLAN 0 to HW filter on device bond0 [ 1025.616613][ T2922] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 1025.627427][ T2922] bridge0: port 1(bridge_slave_0) entered disabled state [ 1025.635977][ T2922] bridge0: port 2(bridge_slave_1) entered disabled state [ 1025.644416][ T2922] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 1025.658670][ T9658] 8021q: adding VLAN 0 to HW filter on device team0 [ 1025.670606][ T2922] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 1025.678939][ T2922] bridge0: port 1(bridge_slave_0) entered blocking state [ 1025.686124][ T2922] bridge0: port 1(bridge_slave_0) entered forwarding state [ 1025.710719][ T9668] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 1025.719103][ T9668] bridge0: port 2(bridge_slave_1) entered blocking state [ 1025.726207][ T9668] bridge0: port 2(bridge_slave_1) entered forwarding state [ 1025.734910][ T9668] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 1025.743633][ T9668] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 1025.758335][ T9658] hsr0: Slave A (hsr_slave_0) is not up; please bring it up to get a fully working HSR network [ 1025.769256][ T9658] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network [ 1025.784130][ T2917] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 1025.792107][ T2917] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 1025.801180][ T2917] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 1025.809527][ T2917] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 1025.830686][ T2922] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 1025.838087][ T2922] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 1025.851814][ T9658] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 1025.869233][ T2917] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_virt_wifi: link becomes ready [ 1025.879087][ T2917] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 1025.900659][ T2917] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_vlan: link becomes ready [ 1025.908777][ T2917] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 1025.918405][ T9658] device veth0_vlan entered promiscuous mode [ 1025.925579][ T9668] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 1025.933636][ T9668] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 1025.946827][ T9658] device veth1_vlan entered promiscuous mode [ 1025.967839][ T2922] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan0: link becomes ready [ 1025.976300][ T2922] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan1: link becomes ready [ 1025.984400][ T2922] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_macvtap: link becomes ready [ 1025.993855][ T2922] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 1026.004587][ T9658] device veth0_macvtap entered promiscuous mode [ 1026.014937][ T9658] device veth1_macvtap entered promiscuous mode [ 1026.031286][ T9658] batman_adv: batadv0: Interface activated: batadv_slave_0 [ 1026.039038][ T2922] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready [ 1026.048870][ T2922] IPv6: ADDRCONF(NETDEV_CHANGE): macsec0: link becomes ready [ 1026.057047][ T2922] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_0: link becomes ready [ 1026.065989][ T2922] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 1026.078067][ T9658] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 1026.086237][ T2917] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready [ 1026.095008][ T2917] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 1026.521202][ T9696] ================================================================== [ 1026.529660][ T9696] BUG: KASAN: use-after-free in __list_add_valid+0x9a/0xa0 [ 1026.536864][ T9696] Read of size 8 at addr ffff8880914421e0 by task syz-executor.0/9696 [ 1026.545079][ T9696] [ 1026.547406][ T9696] CPU: 1 PID: 9696 Comm: syz-executor.0 Not tainted 5.6.0-rc3-next-20200225-syzkaller #0 [ 1026.557549][ T9696] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 1026.567592][ T9696] Call Trace: [ 1026.570983][ T9696] dump_stack+0x197/0x210 [ 1026.575332][ T9696] ? __list_add_valid+0x9a/0xa0 [ 1026.580289][ T9696] print_address_description.constprop.0.cold+0xd4/0x30b [ 1026.587301][ T9696] ? __list_add_valid+0x9a/0xa0 [ 1026.592156][ T9696] ? __list_add_valid+0x9a/0xa0 [ 1026.597000][ T9696] __kasan_report.cold+0x1b/0x32 [ 1026.601925][ T9696] ? __list_add_valid+0x9a/0xa0 [ 1026.606774][ T9696] kasan_report+0x12/0x20 [ 1026.611086][ T9696] __asan_report_load8_noabort+0x14/0x20 [ 1026.616782][ T9696] __list_add_valid+0x9a/0xa0 [ 1026.621541][ T9696] rdma_listen+0x6b7/0x970 [ 1026.626033][ T9696] ? _raw_spin_unlock+0x28/0x40 [ 1026.630933][ T9696] ucma_listen+0x14d/0x1c0 [ 1026.635566][ T9696] ? ucma_notify+0x190/0x190 [ 1026.640252][ T9696] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 1026.646525][ T9696] ? _copy_from_user+0x12c/0x1a0 [ 1026.651458][ T9696] ucma_write+0x2d7/0x3c0 [ 1026.656057][ T9696] ? ucma_notify+0x190/0x190 [ 1026.660626][ T9696] ? ucma_open+0x290/0x290 [ 1026.665073][ T9696] ? apparmor_file_permission+0x27/0x30 [ 1026.670600][ T9696] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 1026.677039][ T9696] ? security_file_permission+0x8f/0x380 [ 1026.682878][ T9696] __vfs_write+0x8a/0x110 [ 1026.687196][ T9696] ? ucma_open+0x290/0x290 [ 1026.691598][ T9696] vfs_write+0x268/0x5d0 [ 1026.695826][ T9696] ksys_write+0x220/0x290 [ 1026.700254][ T9696] ? __ia32_sys_read+0xb0/0xb0 [ 1026.705196][ T9696] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 1026.710660][ T9696] ? do_syscall_64+0x26/0x790 [ 1026.715322][ T9696] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 1026.721546][ T9696] ? do_syscall_64+0x26/0x790 [ 1026.726212][ T9696] __x64_sys_write+0x73/0xb0 [ 1026.731577][ T9696] do_syscall_64+0xfa/0x790 [ 1026.736071][ T9696] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 1026.742128][ T9696] RIP: 0033:0x45c479 [ 1026.746088][ T9696] 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 [ 1026.765689][ T9696] RSP: 002b:00007fb8fb05fc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 [ 1026.774204][ T9696] RAX: ffffffffffffffda RBX: 00007fb8fb0606d4 RCX: 000000000045c479 [ 1026.782433][ T9696] RDX: 0000000000000010 RSI: 0000000020000040 RDI: 0000000000000003 [ 1026.790394][ T9696] RBP: 000000000076bf20 R08: 0000000000000000 R09: 0000000000000000 [ 1026.798358][ T9696] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff [ 1026.806318][ T9696] R13: 0000000000000cbe R14: 00000000004cea34 R15: 000000000076bf2c [ 1026.817524][ T9696] [ 1026.819841][ T9696] Allocated by task 9694: [ 1026.824161][ T9696] save_stack+0x23/0x90 [ 1026.828296][ T9696] __kasan_kmalloc.constprop.0+0xcf/0xe0 [ 1026.833906][ T9696] kasan_kmalloc+0x9/0x10 [ 1026.838226][ T9696] kmem_cache_alloc_trace+0x158/0x790 [ 1026.843577][ T9696] __rdma_create_id+0x5e/0x870 [ 1026.848319][ T9696] ucma_create_id+0x1de/0x620 [ 1026.852985][ T9696] ucma_write+0x2d7/0x3c0 [ 1026.857287][ T9696] __vfs_write+0x8a/0x110 [ 1026.861619][ T9696] vfs_write+0x268/0x5d0 [ 1026.865837][ T9696] ksys_write+0x220/0x290 [ 1026.870140][ T9696] __x64_sys_write+0x73/0xb0 [ 1026.874727][ T9696] do_syscall_64+0xfa/0x790 [ 1026.879238][ T9696] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 1026.885135][ T9696] [ 1026.887445][ T9696] Freed by task 9691: [ 1026.891418][ T9696] save_stack+0x23/0x90 [ 1026.895572][ T9696] __kasan_slab_free+0x102/0x150 [ 1026.900492][ T9696] kasan_slab_free+0xe/0x10 [ 1026.904973][ T9696] kfree+0x10a/0x2c0 [ 1026.908865][ T9696] rdma_destroy_id+0x7c6/0xdd0 [ 1026.913609][ T9696] ucma_close+0x115/0x310 [ 1026.917938][ T9696] __fput+0x2ff/0x890 [ 1026.921958][ T9696] ____fput+0x16/0x20 [ 1026.926021][ T9696] task_work_run+0x145/0x1c0 [ 1026.930608][ T9696] exit_to_usermode_loop+0x316/0x380 [ 1026.935871][ T9696] do_syscall_64+0x676/0x790 [ 1026.940442][ T9696] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 1026.946305][ T9696] [ 1026.948611][ T9696] The buggy address belongs to the object at ffff888091442000 [ 1026.948611][ T9696] which belongs to the cache kmalloc-2k of size 2048 [ 1026.962651][ T9696] The buggy address is located 480 bytes inside of [ 1026.962651][ T9696] 2048-byte region [ffff888091442000, ffff888091442800) [ 1026.975990][ T9696] The buggy address belongs to the page: [ 1026.981603][ T9696] page:ffffea0002451080 refcount:1 mapcount:0 mapping:000000005821cf85 index:0x0 [ 1026.990683][ T9696] flags: 0xfffe0000000200(slab) [ 1026.995515][ T9696] raw: 00fffe0000000200 ffffea00028b9548 ffffea00024cd288 ffff8880aa400e00 [ 1027.004078][ T9696] raw: 0000000000000000 ffff888091442000 0000000100000001 0000000000000000 [ 1027.012644][ T9696] page dumped because: kasan: bad access detected [ 1027.019035][ T9696] [ 1027.021338][ T9696] Memory state around the buggy address: [ 1027.026987][ T9696] ffff888091442080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 1027.035548][ T9696] ffff888091442100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 1027.043597][ T9696] >ffff888091442180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 1027.051654][ T9696] ^ [ 1027.058845][ T9696] ffff888091442200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 1027.066887][ T9696] ffff888091442280: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 1027.074924][ T9696] ================================================================== [ 1027.082962][ T9696] Disabling lock debugging due to kernel taint [ 1027.099042][ T9696] Kernel panic - not syncing: panic_on_warn set ... [ 1027.105660][ T9696] CPU: 1 PID: 9696 Comm: syz-executor.0 Tainted: G B 5.6.0-rc3-next-20200225-syzkaller #0 [ 1027.117265][ T9696] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 1027.127469][ T9696] Call Trace: [ 1027.130749][ T9696] dump_stack+0x197/0x210 [ 1027.135145][ T9696] panic+0x2e3/0x75c [ 1027.139053][ T9696] ? add_taint.cold+0x16/0x16 [ 1027.143721][ T9696] ? __list_add_valid+0x9a/0xa0 [ 1027.148565][ T9696] ? preempt_schedule+0x4b/0x60 [ 1027.153411][ T9696] ? ___preempt_schedule+0x16/0x18 [ 1027.158559][ T9696] ? trace_hardirqs_on+0x5e/0x240 [ 1027.163566][ T9696] ? __list_add_valid+0x9a/0xa0 [ 1027.168485][ T9696] end_report+0x47/0x4f [ 1027.172677][ T9696] ? __list_add_valid+0x9a/0xa0 [ 1027.177519][ T9696] __kasan_report.cold+0xe/0x32 [ 1027.182360][ T9696] ? __list_add_valid+0x9a/0xa0 [ 1027.187202][ T9696] kasan_report+0x12/0x20 [ 1027.191519][ T9696] __asan_report_load8_noabort+0x14/0x20 [ 1027.197135][ T9696] __list_add_valid+0x9a/0xa0 [ 1027.201796][ T9696] rdma_listen+0x6b7/0x970 [ 1027.206194][ T9696] ? _raw_spin_unlock+0x28/0x40 [ 1027.211085][ T9696] ucma_listen+0x14d/0x1c0 [ 1027.215484][ T9696] ? ucma_notify+0x190/0x190 [ 1027.220060][ T9696] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 1027.226283][ T9696] ? _copy_from_user+0x12c/0x1a0 [ 1027.231209][ T9696] ucma_write+0x2d7/0x3c0 [ 1027.235610][ T9696] ? ucma_notify+0x190/0x190 [ 1027.240184][ T9696] ? ucma_open+0x290/0x290 [ 1027.244596][ T9696] ? apparmor_file_permission+0x27/0x30 [ 1027.250129][ T9696] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 1027.256363][ T9696] ? security_file_permission+0x8f/0x380 [ 1027.261979][ T9696] __vfs_write+0x8a/0x110 [ 1027.266291][ T9696] ? ucma_open+0x290/0x290 [ 1027.270699][ T9696] vfs_write+0x268/0x5d0 [ 1027.274922][ T9696] ksys_write+0x220/0x290 [ 1027.279230][ T9696] ? __ia32_sys_read+0xb0/0xb0 [ 1027.283986][ T9696] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 1027.289427][ T9696] ? do_syscall_64+0x26/0x790 [ 1027.294136][ T9696] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 1027.300459][ T9696] ? do_syscall_64+0x26/0x790 [ 1027.305135][ T9696] __x64_sys_write+0x73/0xb0 [ 1027.309804][ T9696] do_syscall_64+0xfa/0x790 [ 1027.314300][ T9696] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 1027.320181][ T9696] RIP: 0033:0x45c479 [ 1027.324097][ T9696] 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 [ 1027.343680][ T9696] RSP: 002b:00007fb8fb05fc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 [ 1027.352069][ T9696] RAX: ffffffffffffffda RBX: 00007fb8fb0606d4 RCX: 000000000045c479 [ 1027.360019][ T9696] RDX: 0000000000000010 RSI: 0000000020000040 RDI: 0000000000000003 [ 1027.367966][ T9696] RBP: 000000000076bf20 R08: 0000000000000000 R09: 0000000000000000 [ 1027.375915][ T9696] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff [ 1027.383882][ T9696] R13: 0000000000000cbe R14: 00000000004cea34 R15: 000000000076bf2c [ 1027.393283][ T9696] Kernel Offset: disabled [ 1027.397621][ T9696] Rebooting in 86400 seconds..