[ OK ] Reached target Login Prompts. [ OK ] Reached target Multi-User System. [ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... [ OK ] Started Update UTMP about System Runlevel Changes. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.81' (ECDSA) to the list of known hosts. 2020/03/27 13:32:35 parsed 1 programs syzkaller login: [ 57.814764][ T7053] as (7053) used greatest stack depth: 23248 bytes left 2020/03/27 13:32:37 executed programs: 0 [ 58.662787][ T7062] IPVS: ftp: loaded support on port[0] = 21 [ 58.761198][ T7062] chnl_net:caif_netlink_parms(): no params data found [ 58.813915][ T7062] bridge0: port 1(bridge_slave_0) entered blocking state [ 58.821253][ T7062] bridge0: port 1(bridge_slave_0) entered disabled state [ 58.829787][ T7062] device bridge_slave_0 entered promiscuous mode [ 58.839386][ T7062] bridge0: port 2(bridge_slave_1) entered blocking state [ 58.846596][ T7062] bridge0: port 2(bridge_slave_1) entered disabled state [ 58.854484][ T7062] device bridge_slave_1 entered promiscuous mode [ 58.874122][ T7062] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 58.884881][ T7062] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 58.907710][ T7062] team0: Port device team_slave_0 added [ 58.915468][ T7062] team0: Port device team_slave_1 added [ 58.933989][ T7062] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 58.940922][ T7062] 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. [ 58.967808][ T7062] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 58.980095][ T7062] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 58.987266][ T7062] 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. [ 59.013305][ T7062] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 59.076371][ T7062] device hsr_slave_0 entered promiscuous mode [ 59.113484][ T7062] device hsr_slave_1 entered promiscuous mode [ 59.249345][ T7062] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 59.295934][ T7062] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 59.375028][ T7062] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 59.425438][ T7062] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 59.478325][ T7062] bridge0: port 2(bridge_slave_1) entered blocking state [ 59.485485][ T7062] bridge0: port 2(bridge_slave_1) entered forwarding state [ 59.493368][ T7062] bridge0: port 1(bridge_slave_0) entered blocking state [ 59.500426][ T7062] bridge0: port 1(bridge_slave_0) entered forwarding state [ 59.546633][ T7062] 8021q: adding VLAN 0 to HW filter on device bond0 [ 59.560261][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 59.571072][ T17] bridge0: port 1(bridge_slave_0) entered disabled state [ 59.579148][ T17] bridge0: port 2(bridge_slave_1) entered disabled state [ 59.587797][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 59.600594][ T7062] 8021q: adding VLAN 0 to HW filter on device team0 [ 59.610938][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 59.620309][ T12] bridge0: port 1(bridge_slave_0) entered blocking state [ 59.627412][ T12] bridge0: port 1(bridge_slave_0) entered forwarding state [ 59.639976][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 59.649049][ T17] bridge0: port 2(bridge_slave_1) entered blocking state [ 59.656162][ T17] bridge0: port 2(bridge_slave_1) entered forwarding state [ 59.685027][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 59.693902][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 59.702246][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 59.713022][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 59.721213][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 59.733387][ T7062] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 59.752201][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 59.761486][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 59.776626][ T7062] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 59.795089][ T2789] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_virt_wifi: link becomes ready [ 59.805409][ T2789] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 59.826751][ T7062] device veth0_vlan entered promiscuous mode [ 59.833322][ T2789] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_vlan: link becomes ready [ 59.841802][ T2789] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 59.854365][ T2789] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 59.862049][ T2789] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 59.874655][ T7062] device veth1_vlan entered promiscuous mode [ 59.897002][ T2789] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan0: link becomes ready [ 59.906100][ T2789] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan1: link becomes ready [ 59.914630][ T2789] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_macvtap: link becomes ready [ 59.923596][ T2789] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 59.935789][ T7062] device veth0_macvtap entered promiscuous mode [ 59.946037][ T7062] device veth1_macvtap entered promiscuous mode [ 59.963485][ T7062] batman_adv: batadv0: Interface activated: batadv_slave_0 [ 59.970830][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready [ 59.979828][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): macsec0: link becomes ready [ 59.988309][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_0: link becomes ready [ 59.997296][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 60.009728][ T7062] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 60.017934][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready [ 60.026830][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 60.644653][ T7319] ================================================================== [ 60.652886][ T7319] BUG: KASAN: use-after-free in __list_add_valid+0x93/0xa0 [ 60.660085][ T7319] Read of size 8 at addr ffff8880989711e0 by task syz-executor.0/7319 [ 60.668225][ T7319] [ 60.670560][ T7319] CPU: 1 PID: 7319 Comm: syz-executor.0 Not tainted 5.6.0-rc7-syzkaller #0 [ 60.679137][ T7319] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 60.689209][ T7319] Call Trace: [ 60.692508][ T7319] dump_stack+0x188/0x20d [ 60.696843][ T7319] ? __list_add_valid+0x93/0xa0 [ 60.701698][ T7319] ? __list_add_valid+0x93/0xa0 [ 60.706556][ T7319] print_address_description.constprop.0.cold+0xd3/0x315 [ 60.713579][ T7319] ? __list_add_valid+0x93/0xa0 [ 60.718427][ T7319] ? __list_add_valid+0x93/0xa0 [ 60.723275][ T7319] __kasan_report.cold+0x1a/0x32 [ 60.728208][ T7319] ? __list_add_valid+0x93/0xa0 [ 60.733045][ T7319] kasan_report+0xe/0x20 [ 60.737271][ T7319] __list_add_valid+0x93/0xa0 [ 60.741930][ T7319] rdma_listen+0x681/0x910 [ 60.746336][ T7319] ucma_listen+0x14d/0x1c0 [ 60.750732][ T7319] ? ucma_notify+0x190/0x190 [ 60.755363][ T7319] ? __might_fault+0x190/0x1d0 [ 60.760114][ T7319] ? _copy_from_user+0x123/0x190 [ 60.765042][ T7319] ? ucma_notify+0x190/0x190 [ 60.769613][ T7319] ucma_write+0x285/0x350 [ 60.773923][ T7319] ? ucma_open+0x270/0x270 [ 60.778323][ T7319] ? security_file_permission+0x8a/0x370 [ 60.783936][ T7319] ? ucma_open+0x270/0x270 [ 60.788330][ T7319] __vfs_write+0x76/0x100 [ 60.792644][ T7319] vfs_write+0x262/0x5c0 [ 60.796866][ T7319] ksys_write+0x1e8/0x250 [ 60.801182][ T7319] ? __ia32_sys_read+0xb0/0xb0 [ 60.805930][ T7319] ? __ia32_sys_clock_settime+0x260/0x260 [ 60.811638][ T7319] ? trace_hardirqs_off_caller+0x55/0x230 [ 60.817346][ T7319] do_syscall_64+0xf6/0x7d0 [ 60.821835][ T7319] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 60.827736][ T7319] RIP: 0033:0x45c849 [ 60.831622][ T7319] 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 [ 60.851206][ T7319] RSP: 002b:00007fb0483a2c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 [ 60.859600][ T7319] RAX: ffffffffffffffda RBX: 00007fb0483a36d4 RCX: 000000000045c849 [ 60.867548][ T7319] RDX: 0000000000000010 RSI: 0000000020000040 RDI: 0000000000000003 [ 60.875495][ T7319] RBP: 000000000076bf00 R08: 0000000000000000 R09: 0000000000000000 [ 60.883443][ T7319] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff [ 60.891389][ T7319] R13: 0000000000000cc0 R14: 00000000004cee4e R15: 000000000076bf0c [ 60.899349][ T7319] [ 60.901664][ T7319] Allocated by task 7314: [ 60.905973][ T7319] save_stack+0x1b/0x80 [ 60.910105][ T7319] __kasan_kmalloc.constprop.0+0xbf/0xd0 [ 60.915724][ T7319] kmem_cache_alloc_trace+0x153/0x7d0 [ 60.921072][ T7319] __rdma_create_id+0x5b/0x850 [ 60.925831][ T7319] ucma_create_id+0x1cb/0x580 [ 60.930485][ T7319] ucma_write+0x285/0x350 [ 60.934795][ T7319] __vfs_write+0x76/0x100 [ 60.939102][ T7319] vfs_write+0x262/0x5c0 [ 60.943326][ T7319] ksys_write+0x1e8/0x250 [ 60.947642][ T7319] do_syscall_64+0xf6/0x7d0 [ 60.952128][ T7319] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 60.958006][ T7319] [ 60.960319][ T7319] Freed by task 7313: [ 60.964295][ T7319] save_stack+0x1b/0x80 [ 60.968436][ T7319] __kasan_slab_free+0xf7/0x140 [ 60.973275][ T7319] kfree+0x109/0x2b0 [ 60.977145][ T7319] ucma_close+0x10b/0x300 [ 60.981451][ T7319] __fput+0x2da/0x850 [ 60.985412][ T7319] task_work_run+0x13f/0x1b0 [ 60.989988][ T7319] exit_to_usermode_loop+0x2fa/0x360 [ 60.995250][ T7319] do_syscall_64+0x6b1/0x7d0 [ 60.999817][ T7319] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 61.005682][ T7319] [ 61.007989][ T7319] The buggy address belongs to the object at ffff888098971000 [ 61.007989][ T7319] which belongs to the cache kmalloc-2k of size 2048 [ 61.022018][ T7319] The buggy address is located 480 bytes inside of [ 61.022018][ T7319] 2048-byte region [ffff888098971000, ffff888098971800) [ 61.035350][ T7319] The buggy address belongs to the page: [ 61.040970][ T7319] page:ffffea0002625c40 refcount:1 mapcount:0 mapping:ffff8880aa000e00 index:0x0 [ 61.050058][ T7319] flags: 0xfffe0000000200(slab) [ 61.054888][ T7319] raw: 00fffe0000000200 ffffea0002a25b88 ffffea0002621e08 ffff8880aa000e00 [ 61.063491][ T7319] raw: 0000000000000000 ffff888098971000 0000000100000001 0000000000000000 [ 61.072048][ T7319] page dumped because: kasan: bad access detected [ 61.078461][ T7319] [ 61.080767][ T7319] Memory state around the buggy address: [ 61.086375][ T7319] ffff888098971080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 61.094417][ T7319] ffff888098971100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 61.102482][ T7319] >ffff888098971180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 61.110529][ T7319] ^ [ 61.117712][ T7319] ffff888098971200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 61.125750][ T7319] ffff888098971280: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 61.133783][ T7319] ================================================================== [ 61.141963][ T7319] Disabling lock debugging due to kernel taint [ 61.156377][ T7319] Kernel panic - not syncing: panic_on_warn set ... [ 61.162983][ T7319] CPU: 1 PID: 7319 Comm: syz-executor.0 Tainted: G B 5.6.0-rc7-syzkaller #0 [ 61.172962][ T7319] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 61.183010][ T7319] Call Trace: [ 61.186282][ T7319] dump_stack+0x188/0x20d [ 61.190638][ T7319] panic+0x2e3/0x75c [ 61.194515][ T7319] ? add_taint.cold+0x16/0x16 [ 61.199173][ T7319] ? preempt_schedule_common+0x5e/0xc0 [ 61.204652][ T7319] ? __list_add_valid+0x93/0xa0 [ 61.209504][ T7319] ? ___preempt_schedule+0x16/0x18 [ 61.214605][ T7319] ? trace_hardirqs_on+0x55/0x220 [ 61.219614][ T7319] ? __list_add_valid+0x93/0xa0 [ 61.224482][ T7319] end_report+0x43/0x49 [ 61.228625][ T7319] ? __list_add_valid+0x93/0xa0 [ 61.233452][ T7319] __kasan_report.cold+0xd/0x32 [ 61.238282][ T7319] ? __list_add_valid+0x93/0xa0 [ 61.243121][ T7319] kasan_report+0xe/0x20 [ 61.247355][ T7319] __list_add_valid+0x93/0xa0 [ 61.252011][ T7319] rdma_listen+0x681/0x910 [ 61.256410][ T7319] ucma_listen+0x14d/0x1c0 [ 61.260822][ T7319] ? ucma_notify+0x190/0x190 [ 61.265398][ T7319] ? __might_fault+0x190/0x1d0 [ 61.270145][ T7319] ? _copy_from_user+0x123/0x190 [ 61.275060][ T7319] ? ucma_notify+0x190/0x190 [ 61.279640][ T7319] ucma_write+0x285/0x350 [ 61.283962][ T7319] ? ucma_open+0x270/0x270 [ 61.288360][ T7319] ? security_file_permission+0x8a/0x370 [ 61.293981][ T7319] ? ucma_open+0x270/0x270 [ 61.298386][ T7319] __vfs_write+0x76/0x100 [ 61.302697][ T7319] vfs_write+0x262/0x5c0 [ 61.306934][ T7319] ksys_write+0x1e8/0x250 [ 61.311242][ T7319] ? __ia32_sys_read+0xb0/0xb0 [ 61.315995][ T7319] ? __ia32_sys_clock_settime+0x260/0x260 [ 61.321706][ T7319] ? trace_hardirqs_off_caller+0x55/0x230 [ 61.327409][ T7319] do_syscall_64+0xf6/0x7d0 [ 61.331899][ T7319] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 61.337783][ T7319] RIP: 0033:0x45c849 [ 61.341656][ T7319] 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 [ 61.361249][ T7319] RSP: 002b:00007fb0483a2c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 [ 61.369640][ T7319] RAX: ffffffffffffffda RBX: 00007fb0483a36d4 RCX: 000000000045c849 [ 61.377586][ T7319] RDX: 0000000000000010 RSI: 0000000020000040 RDI: 0000000000000003 [ 61.385545][ T7319] RBP: 000000000076bf00 R08: 0000000000000000 R09: 0000000000000000 [ 61.393497][ T7319] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff [ 61.401446][ T7319] R13: 0000000000000cc0 R14: 00000000004cee4e R15: 000000000076bf0c [ 61.410352][ T7319] Kernel Offset: disabled [ 61.414669][ T7319] Rebooting in 86400 seconds..