[ OK ] Started Getty on tty4. [ OK ] Started Getty on tty3. [ OK ] Started Getty on tty2. [ OK ] Started Serial Getty on ttyS0. [ OK ] Started Getty on tty1. [ 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. Starting Load/Save RF Kill Switch Status... [ OK ] Started Load/Save RF Kill Switch Status. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.192' (ECDSA) to the list of known hosts. syzkaller login: [ 52.467533][ T6854] IPVS: ftp: loaded support on port[0] = 21 [ 52.599840][ T6854] chnl_net:caif_netlink_parms(): no params data found [ 52.647488][ T6854] bridge0: port 1(bridge_slave_0) entered blocking state [ 52.654944][ T6854] bridge0: port 1(bridge_slave_0) entered disabled state [ 52.663035][ T6854] device bridge_slave_0 entered promiscuous mode [ 52.671662][ T6854] bridge0: port 2(bridge_slave_1) entered blocking state [ 52.678836][ T6854] bridge0: port 2(bridge_slave_1) entered disabled state [ 52.686370][ T6854] device bridge_slave_1 entered promiscuous mode [ 52.705070][ T6854] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 52.715746][ T6854] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 52.736509][ T6854] team0: Port device team_slave_0 added [ 52.743750][ T6854] team0: Port device team_slave_1 added [ 52.761269][ T6854] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 52.768396][ T6854] 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. [ 52.794312][ T6854] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 52.806332][ T6854] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 52.813323][ T6854] 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. [ 52.839247][ T6854] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 52.864619][ T6854] device hsr_slave_0 entered promiscuous mode [ 52.871241][ T6854] device hsr_slave_1 entered promiscuous mode [ 52.960746][ T6854] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 52.972119][ T6854] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 52.980692][ T6854] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 52.990049][ T6854] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 53.012941][ T6854] bridge0: port 2(bridge_slave_1) entered blocking state [ 53.020197][ T6854] bridge0: port 2(bridge_slave_1) entered forwarding state [ 53.027662][ T6854] bridge0: port 1(bridge_slave_0) entered blocking state [ 53.034773][ T6854] bridge0: port 1(bridge_slave_0) entered forwarding state [ 53.078703][ T6854] 8021q: adding VLAN 0 to HW filter on device bond0 [ 53.091762][ T6761] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 53.102064][ T6761] bridge0: port 1(bridge_slave_0) entered disabled state [ 53.110405][ T6761] bridge0: port 2(bridge_slave_1) entered disabled state [ 53.118944][ T6761] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 53.130578][ T6854] 8021q: adding VLAN 0 to HW filter on device team0 [ 53.141114][ T3091] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 53.150709][ T3091] bridge0: port 1(bridge_slave_0) entered blocking state [ 53.157728][ T3091] bridge0: port 1(bridge_slave_0) entered forwarding state [ 53.181403][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 53.190692][ T17] bridge0: port 2(bridge_slave_1) entered blocking state [ 53.197711][ T17] bridge0: port 2(bridge_slave_1) entered forwarding state [ 53.206208][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 53.216397][ T17] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 53.232344][ T6854] hsr0: Slave A (hsr_slave_0) is not up; please bring it up to get a fully working HSR network [ 53.243379][ T6854] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network [ 53.255406][ T49] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 53.263794][ T49] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 53.272606][ T49] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 53.282511][ T49] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 53.297679][ T6761] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 53.305173][ T6761] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 53.319464][ T6854] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 53.338173][ T49] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 53.359156][ T49] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 53.367314][ T49] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 53.375892][ T49] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 53.385289][ T6854] device veth0_vlan entered promiscuous mode [ 53.396131][ T6854] device veth1_vlan entered promiscuous mode [ 53.416582][ T6761] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan0: link becomes ready [ 53.424911][ T6761] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan1: link becomes ready [ 53.433146][ T6761] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 53.443423][ T6854] device veth0_macvtap entered promiscuous mode [ 53.454084][ T6854] device veth1_macvtap entered promiscuous mode [ 53.470820][ T6854] batman_adv: batadv0: Interface activated: batadv_slave_0 [ 53.478277][ T49] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 53.487719][ T49] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready [ 53.500950][ T6854] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 53.508630][ T6761] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 53.520645][ T6854] netdevsim netdevsim0 netdevsim0: set [1, 0] type 2 family 0 port 6081 - 0 [ 53.529665][ T6854] netdevsim netdevsim0 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0 executing program [ 53.538905][ T6854] netdevsim netdevsim0 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0 [ 53.547597][ T6854] netdevsim netdevsim0 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0 [ 53.618398][ C0] ================================================================== [ 53.626713][ C0] BUG: KASAN: use-after-free in xp_put_pool+0x2c/0x1e0 [ 53.633543][ C0] Write of size 4 at addr ffff8880a6a4d860 by task ksoftirqd/0/9 [ 53.641239][ C0] [ 53.643539][ C0] CPU: 0 PID: 9 Comm: ksoftirqd/0 Not tainted 5.9.0-rc1-syzkaller #0 [ 53.651569][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 53.661631][ C0] Call Trace: [ 53.664894][ C0] dump_stack+0x18f/0x20d [ 53.669197][ C0] ? xp_put_pool+0x2c/0x1e0 [ 53.673703][ C0] ? xp_put_pool+0x2c/0x1e0 [ 53.678199][ C0] print_address_description.constprop.0.cold+0xae/0x497 [ 53.685193][ C0] ? vprintk_func+0x97/0x1a6 [ 53.689771][ C0] ? xp_put_pool+0x2c/0x1e0 [ 53.694244][ C0] ? xp_put_pool+0x2c/0x1e0 [ 53.698716][ C0] kasan_report.cold+0x1f/0x37 [ 53.703458][ C0] ? lock_release+0x841/0x8e0 [ 53.708106][ C0] ? xp_put_pool+0x2c/0x1e0 [ 53.712581][ C0] check_memory_region+0x13d/0x180 [ 53.717662][ C0] xp_put_pool+0x2c/0x1e0 [ 53.721963][ C0] xsk_destruct+0x7d/0xa0 [ 53.726261][ C0] ? xsk_create+0x750/0x750 [ 53.730739][ C0] __sk_destruct+0x4b/0x860 [ 53.735231][ C0] rcu_core+0x5c7/0x1190 [ 53.739461][ C0] ? __rcu_read_unlock+0x560/0x560 [ 53.744544][ C0] ? sched_clock_cpu+0x18/0x1b0 [ 53.749370][ C0] ? lock_is_held_type+0xbb/0xf0 [ 53.754288][ C0] __do_softirq+0x2de/0xa24 [ 53.758783][ C0] ? __local_bh_disable_ip+0x190/0x190 [ 53.764213][ C0] run_ksoftirqd+0x89/0x100 [ 53.768700][ C0] smpboot_thread_fn+0x655/0x9e0 [ 53.773617][ C0] ? __smpboot_create_thread.part.0+0x340/0x340 [ 53.779828][ C0] ? __kthread_parkme+0x13f/0x1e0 [ 53.784821][ C0] ? __smpboot_create_thread.part.0+0x340/0x340 [ 53.791030][ C0] kthread+0x3b5/0x4a0 [ 53.795069][ C0] ? __kthread_bind_mask+0xc0/0xc0 [ 53.800160][ C0] ? __kthread_bind_mask+0xc0/0xc0 [ 53.805251][ C0] ret_from_fork+0x1f/0x30 [ 53.809641][ C0] [ 53.811942][ C0] Allocated by task 6854: [ 53.816243][ C0] kasan_save_stack+0x1b/0x40 [ 53.820891][ C0] __kasan_kmalloc.constprop.0+0xbf/0xd0 [ 53.826491][ C0] kvmalloc_node+0x61/0xf0 [ 53.830904][ C0] xp_create_and_assign_umem+0x58/0x8d0 [ 53.836416][ C0] xsk_bind+0x9a0/0xed0 [ 53.840540][ C0] __sys_bind+0x1e9/0x250 [ 53.844849][ C0] __x64_sys_bind+0x6f/0xb0 [ 53.849323][ C0] do_syscall_64+0x2d/0x70 [ 53.853728][ C0] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 53.859595][ C0] [ 53.861914][ C0] Freed by task 6854: [ 53.865890][ C0] kasan_save_stack+0x1b/0x40 [ 53.870556][ C0] kasan_set_track+0x1c/0x30 [ 53.875136][ C0] kasan_set_free_info+0x1b/0x30 [ 53.880064][ C0] __kasan_slab_free+0xd8/0x120 [ 53.884907][ C0] kfree+0x103/0x2c0 [ 53.888795][ C0] kvfree+0x42/0x50 [ 53.892601][ C0] xp_destroy+0x45/0x60 [ 53.896768][ C0] xsk_bind+0xbdd/0xed0 [ 53.900917][ C0] __sys_bind+0x1e9/0x250 [ 53.905236][ C0] __x64_sys_bind+0x6f/0xb0 [ 53.909734][ C0] do_syscall_64+0x2d/0x70 [ 53.914140][ C0] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 53.920011][ C0] [ 53.922333][ C0] The buggy address belongs to the object at ffff8880a6a4d800 [ 53.922333][ C0] which belongs to the cache kmalloc-1k of size 1024 [ 53.936371][ C0] The buggy address is located 96 bytes inside of [ 53.936371][ C0] 1024-byte region [ffff8880a6a4d800, ffff8880a6a4dc00) [ 53.949621][ C0] The buggy address belongs to the page: [ 53.955248][ C0] page:00000000dd5fc18f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xa6a4d [ 53.965389][ C0] flags: 0xfffe0000000200(slab) [ 53.970245][ C0] raw: 00fffe0000000200 ffffea00029cce48 ffffea00025f2148 ffff8880aa040700 [ 53.978835][ C0] raw: 0000000000000000 ffff8880a6a4d000 0000000100000002 0000000000000000 [ 53.987405][ C0] page dumped because: kasan: bad access detected [ 53.993801][ C0] [ 53.996115][ C0] Memory state around the buggy address: [ 54.001734][ C0] ffff8880a6a4d700: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 54.009784][ C0] ffff8880a6a4d780: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 54.017846][ C0] >ffff8880a6a4d800: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 54.025893][ C0] ^ [ 54.033058][ C0] ffff8880a6a4d880: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 54.041138][ C0] ffff8880a6a4d900: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 54.049165][ C0] ================================================================== [ 54.057192][ C0] Disabling lock debugging due to kernel taint [ 54.063376][ C0] Kernel panic - not syncing: panic_on_warn set ... [ 54.069956][ C0] CPU: 0 PID: 9 Comm: ksoftirqd/0 Tainted: G B 5.9.0-rc1-syzkaller #0 [ 54.079400][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 54.089455][ C0] Call Trace: [ 54.092731][ C0] dump_stack+0x18f/0x20d [ 54.097034][ C0] ? xp_get_pool+0x10/0xa0 [ 54.101421][ C0] panic+0x2e3/0x75c [ 54.105286][ C0] ? __warn_printk+0xf3/0xf3 [ 54.109847][ C0] ? asm_common_interrupt+0x1e/0x40 [ 54.115028][ C0] ? trace_hardirqs_on+0x55/0x220 [ 54.120024][ C0] ? xp_put_pool+0x2c/0x1e0 [ 54.124493][ C0] ? xp_put_pool+0x2c/0x1e0 [ 54.128967][ C0] end_report+0x4d/0x53 [ 54.133093][ C0] kasan_report.cold+0xd/0x37 [ 54.137746][ C0] ? lock_release+0x841/0x8e0 [ 54.142398][ C0] ? xp_put_pool+0x2c/0x1e0 [ 54.146876][ C0] check_memory_region+0x13d/0x180 [ 54.151957][ C0] xp_put_pool+0x2c/0x1e0 [ 54.156259][ C0] xsk_destruct+0x7d/0xa0 [ 54.160562][ C0] ? xsk_create+0x750/0x750 [ 54.165087][ C0] __sk_destruct+0x4b/0x860 [ 54.169564][ C0] rcu_core+0x5c7/0x1190 [ 54.173779][ C0] ? __rcu_read_unlock+0x560/0x560 [ 54.178911][ C0] ? sched_clock_cpu+0x18/0x1b0 [ 54.183734][ C0] ? lock_is_held_type+0xbb/0xf0 [ 54.188679][ C0] __do_softirq+0x2de/0xa24 [ 54.193154][ C0] ? __local_bh_disable_ip+0x190/0x190 [ 54.198582][ C0] run_ksoftirqd+0x89/0x100 [ 54.203061][ C0] smpboot_thread_fn+0x655/0x9e0 [ 54.207971][ C0] ? __smpboot_create_thread.part.0+0x340/0x340 [ 54.214226][ C0] ? __kthread_parkme+0x13f/0x1e0 [ 54.219221][ C0] ? __smpboot_create_thread.part.0+0x340/0x340 [ 54.225428][ C0] kthread+0x3b5/0x4a0 [ 54.229466][ C0] ? __kthread_bind_mask+0xc0/0xc0 [ 54.234544][ C0] ? __kthread_bind_mask+0xc0/0xc0 [ 54.239627][ C0] ret_from_fork+0x1f/0x30 [ 54.245199][ C0] Kernel Offset: disabled [ 54.249506][ C0] Rebooting in 86400 seconds..