Starting Load/Save RF Kill Switch Status... [ OK ] Started Load/Save RF Kill Switch Status. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.1.2' (ECDSA) to the list of known hosts. 2020/05/23 13:05:09 parsed 1 programs 2020/05/23 13:05:09 executed programs: 0 syzkaller login: [ 56.121381][ T6833] IPVS: ftp: loaded support on port[0] = 21 [ 56.222126][ T6833] chnl_net:caif_netlink_parms(): no params data found [ 56.274491][ T6833] bridge0: port 1(bridge_slave_0) entered blocking state [ 56.281929][ T6833] bridge0: port 1(bridge_slave_0) entered disabled state [ 56.290767][ T6833] device bridge_slave_0 entered promiscuous mode [ 56.300217][ T6833] bridge0: port 2(bridge_slave_1) entered blocking state [ 56.307878][ T6833] bridge0: port 2(bridge_slave_1) entered disabled state [ 56.319190][ T6833] device bridge_slave_1 entered promiscuous mode [ 56.340725][ T6833] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 56.351618][ T6833] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 56.375105][ T6833] team0: Port device team_slave_0 added [ 56.382461][ T6833] team0: Port device team_slave_1 added [ 56.401407][ T6833] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 56.408515][ T6833] 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. [ 56.435542][ T6833] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 56.448164][ T6833] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 56.456171][ T6833] 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. [ 56.482247][ T6833] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 56.576556][ T6833] device hsr_slave_0 entered promiscuous mode [ 56.643350][ T6833] device hsr_slave_1 entered promiscuous mode [ 56.801012][ T6833] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 56.866000][ T6833] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 56.925691][ T6833] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 56.965567][ T6833] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 57.030208][ T6833] bridge0: port 2(bridge_slave_1) entered blocking state [ 57.037398][ T6833] bridge0: port 2(bridge_slave_1) entered forwarding state [ 57.045326][ T6833] bridge0: port 1(bridge_slave_0) entered blocking state [ 57.052491][ T6833] bridge0: port 1(bridge_slave_0) entered forwarding state [ 57.097936][ T6833] 8021q: adding VLAN 0 to HW filter on device bond0 [ 57.111572][ T2552] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 57.122337][ T2552] bridge0: port 1(bridge_slave_0) entered disabled state [ 57.130778][ T2552] bridge0: port 2(bridge_slave_1) entered disabled state [ 57.139324][ T2552] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 57.153052][ T6833] 8021q: adding VLAN 0 to HW filter on device team0 [ 57.164570][ T27] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 57.174109][ T27] bridge0: port 1(bridge_slave_0) entered blocking state [ 57.181172][ T27] bridge0: port 1(bridge_slave_0) entered forwarding state [ 57.204457][ T2552] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 57.214069][ T2552] bridge0: port 2(bridge_slave_1) entered blocking state [ 57.221145][ T2552] bridge0: port 2(bridge_slave_1) entered forwarding state [ 57.229808][ T2552] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 57.239145][ T2552] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 57.250814][ T27] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_team: link becomes ready [ 57.260501][ T27] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 57.278063][ T6833] hsr0: Slave A (hsr_slave_0) is not up; please bring it up to get a fully working HSR network [ 57.293841][ T6833] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network [ 57.306457][ T2712] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_hsr: link becomes ready [ 57.315583][ T2712] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 57.325068][ T2712] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_hsr: link becomes ready [ 57.334376][ T2712] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 57.353173][ T2712] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 57.360911][ T2712] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 57.369167][ T2712] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 57.383922][ T6833] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 57.402629][ T2552] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_virt_wifi: link becomes ready [ 57.412160][ T2552] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 57.433793][ T2552] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_vlan: link becomes ready [ 57.442126][ T2552] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 57.451366][ T6833] device veth0_vlan entered promiscuous mode [ 57.458792][ T2551] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 57.466877][ T2551] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 57.479724][ T6833] device veth1_vlan entered promiscuous mode [ 57.501227][ T2712] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan0: link becomes ready [ 57.510130][ T2712] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan1: link becomes ready [ 57.518771][ T2712] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_macvtap: link becomes ready [ 57.527423][ T2712] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 57.538883][ T6833] device veth0_macvtap entered promiscuous mode [ 57.549459][ T6833] device veth1_macvtap entered promiscuous mode [ 57.567983][ T6833] batman_adv: batadv0: Interface activated: batadv_slave_0 [ 57.575976][ T2551] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready [ 57.585305][ T2551] IPv6: ADDRCONF(NETDEV_CHANGE): macsec0: link becomes ready [ 57.593813][ T2551] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_0: link becomes ready [ 57.602236][ T2551] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 57.614522][ T6833] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 57.623963][ T2551] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready [ 57.632605][ T2551] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 57.851842][ T7041] ubi0: attaching mtd0 [ 57.857164][ T7041] ubi0: scanning is finished [ 57.861953][ T7041] ubi0: empty MTD device detected [ 57.929648][ T7041] ubi0: attached mtd0 (name "mtdram test device", size 0 MiB) [ 57.939403][ T7041] ubi0: PEB size: 4096 bytes (4 KiB), LEB size: 3968 bytes [ 57.948030][ T7041] ubi0: min./max. I/O unit sizes: 1/64, sub-page size 1 [ 57.956082][ T7041] ubi0: VID header offset: 64 (aligned 64), data offset: 128 [ 57.964503][ T7041] ubi0: good PEBs: 32, bad PEBs: 0, corrupted PEBs: 0 [ 57.971288][ T7041] ubi0: user volume: 0, internal volumes: 1, max. volumes count: 23 [ 57.981165][ T7041] ubi0: max/mean erase counter: 0/0, WL threshold: 4096, image sequence number: 344945975 [ 57.992569][ T7041] ubi0: available PEBs: 28, total reserved PEBs: 4, PEBs reserved for bad PEB handling: 0 [ 58.004884][ T7045] ubi0: background thread "ubi_bgt0d" started, PID 7045 [ 58.029999][ T7047] ubi0: detaching mtd0 [ 58.038547][ T7047] ================================================================== [ 58.046792][ T7047] BUG: KASAN: use-after-free in uif_close+0x15e/0x190 [ 58.053553][ T7047] Read of size 4 at addr ffff8880877909e8 by task syz-executor.0/7047 [ 58.061696][ T7047] [ 58.064029][ T7047] CPU: 0 PID: 7047 Comm: syz-executor.0 Not tainted 5.7.0-rc6-next-20200522-syzkaller #0 [ 58.074111][ T7047] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 58.086437][ T7047] Call Trace: [ 58.089724][ T7047] dump_stack+0x18f/0x20d [ 58.094053][ T7047] ? uif_close+0x15e/0x190 [ 58.098471][ T7047] ? uif_close+0x15e/0x190 [ 58.102895][ T7047] print_address_description.constprop.0.cold+0xd3/0x413 [ 58.109953][ T7047] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 58.115948][ T7047] ? vprintk_func+0x97/0x1a6 [ 58.120807][ T7047] ? uif_close+0x15e/0x190 [ 58.125253][ T7047] kasan_report.cold+0x1f/0x37 [ 58.130021][ T7047] ? uif_close+0x15e/0x190 [ 58.134459][ T7047] uif_close+0x15e/0x190 [ 58.138783][ T7047] ubi_detach_mtd_dev+0x226/0x432 [ 58.143828][ T7047] ctrl_cdev_ioctl+0x1bf/0x2b0 [ 58.148585][ T7047] ? vol_cdev_llseek+0x160/0x160 [ 58.153527][ T7047] ? __x64_sys_futex+0x380/0x4f0 [ 58.158476][ T7047] ? vol_cdev_llseek+0x160/0x160 [ 58.163428][ T7047] ksys_ioctl+0x11a/0x180 [ 58.167741][ T7047] __x64_sys_ioctl+0x6f/0xb0 [ 58.172329][ T7047] do_syscall_64+0xf6/0x7d0 [ 58.176834][ T7047] entry_SYSCALL_64_after_hwframe+0x49/0xb3 [ 58.182725][ T7047] RIP: 0033:0x45ca29 [ 58.186694][ T7047] Code: 0d b7 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 db b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00 [ 58.206430][ T7047] RSP: 002b:00007ffe58df5028 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 58.214870][ T7047] RAX: ffffffffffffffda RBX: 00000000004e1080 RCX: 000000000045ca29 [ 58.222828][ T7047] RDX: 000000000076006e RSI: 0000000040046f41 RDI: 0000000000000003 [ 58.230780][ T7047] RBP: 000000000078bf00 R08: 0000000000000000 R09: 0000000000000000 [ 58.238842][ T7047] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff [ 58.246817][ T7047] R13: 0000000000000209 R14: 00000000004c44c1 R15: 0000000001c98914 [ 58.254790][ T7047] [ 58.257122][ T7047] Allocated by task 7041: [ 58.261444][ T7047] save_stack+0x1b/0x40 [ 58.265578][ T7047] __kasan_kmalloc.constprop.0+0xbf/0xd0 [ 58.271209][ T7047] kmem_cache_alloc_trace+0x153/0x7d0 [ 58.276575][ T7047] ubi_attach_mtd_dev+0x2e7/0x27c0 [ 58.281762][ T7047] ctrl_cdev_ioctl+0x229/0x2b0 [ 58.286619][ T7047] ksys_ioctl+0x11a/0x180 [ 58.290931][ T7047] __x64_sys_ioctl+0x6f/0xb0 [ 58.295524][ T7047] do_syscall_64+0xf6/0x7d0 [ 58.300020][ T7047] entry_SYSCALL_64_after_hwframe+0x49/0xb3 [ 58.305891][ T7047] [ 58.308214][ T7047] Freed by task 7047: [ 58.312189][ T7047] save_stack+0x1b/0x40 [ 58.316335][ T7047] __kasan_slab_free+0xf7/0x140 [ 58.321165][ T7047] kfree+0x109/0x2b0 [ 58.325177][ T7047] device_release+0x71/0x200 [ 58.329751][ T7047] kobject_put+0x1c8/0x2f0 [ 58.334153][ T7047] cdev_device_del+0x69/0x80 [ 58.338734][ T7047] uif_close+0xea/0x190 [ 58.342902][ T7047] ubi_detach_mtd_dev+0x226/0x432 [ 58.347929][ T7047] ctrl_cdev_ioctl+0x1bf/0x2b0 [ 58.352679][ T7047] ksys_ioctl+0x11a/0x180 [ 58.356989][ T7047] __x64_sys_ioctl+0x6f/0xb0 [ 58.361570][ T7047] do_syscall_64+0xf6/0x7d0 [ 58.366208][ T7047] entry_SYSCALL_64_after_hwframe+0x49/0xb3 [ 58.372268][ T7047] [ 58.374591][ T7047] The buggy address belongs to the object at ffff888087790000 [ 58.374591][ T7047] which belongs to the cache kmalloc-8k of size 8192 [ 58.388929][ T7047] The buggy address is located 2536 bytes inside of [ 58.388929][ T7047] 8192-byte region [ffff888087790000, ffff888087792000) [ 58.402372][ T7047] The buggy address belongs to the page: [ 58.408004][ T7047] page:ffffea00021de400 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 head:ffffea00021de400 order:2 compound_mapcount:0 compound_pincount:0 [ 58.423491][ T7047] flags: 0xfffe0000010200(slab|head) [ 58.428758][ T7047] raw: 00fffe0000010200 ffffea0002487808 ffff8880aa001b50 ffff8880aa0021c0 [ 58.437318][ T7047] raw: 0000000000000000 ffff888087790000 0000000100000001 0000000000000000 [ 58.445876][ T7047] page dumped because: kasan: bad access detected [ 58.452273][ T7047] [ 58.454579][ T7047] Memory state around the buggy address: [ 58.460203][ T7047] ffff888087790880: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 58.468260][ T7047] ffff888087790900: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 58.476300][ T7047] >ffff888087790980: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 58.484349][ T7047] ^ [ 58.491874][ T7047] ffff888087790a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 58.500105][ T7047] ffff888087790a80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 58.508146][ T7047] ================================================================== [ 58.516182][ T7047] Disabling lock debugging due to kernel taint [ 58.527705][ T7047] Kernel panic - not syncing: panic_on_warn set ... [ 58.534318][ T7047] CPU: 0 PID: 7047 Comm: syz-executor.0 Tainted: G B 5.7.0-rc6-next-20200522-syzkaller #0 [ 58.545592][ T7047] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 58.555727][ T7047] Call Trace: [ 58.559022][ T7047] dump_stack+0x18f/0x20d [ 58.563381][ T7047] ? uif_close+0x110/0x190 [ 58.567774][ T7047] panic+0x2e3/0x75c [ 58.571651][ T7047] ? __warn_printk+0xf3/0xf3 [ 58.576228][ T7047] ? preempt_schedule_common+0x5e/0xc0 [ 58.581666][ T7047] ? uif_close+0x15e/0x190 [ 58.586059][ T7047] ? uif_close+0x15e/0x190 [ 58.590475][ T7047] ? preempt_schedule_thunk+0x16/0x18 [ 58.595833][ T7047] ? trace_hardirqs_on+0x55/0x230 [ 58.600851][ T7047] ? uif_close+0x15e/0x190 [ 58.605292][ T7047] ? uif_close+0x15e/0x190 [ 58.609783][ T7047] end_report+0x4d/0x53 [ 58.613927][ T7047] kasan_report.cold+0xd/0x37 [ 58.618690][ T7047] ? uif_close+0x15e/0x190 [ 58.623100][ T7047] uif_close+0x15e/0x190 [ 58.627366][ T7047] ubi_detach_mtd_dev+0x226/0x432 [ 58.632494][ T7047] ctrl_cdev_ioctl+0x1bf/0x2b0 [ 58.637251][ T7047] ? vol_cdev_llseek+0x160/0x160 [ 58.642178][ T7047] ? __x64_sys_futex+0x380/0x4f0 [ 58.647114][ T7047] ? vol_cdev_llseek+0x160/0x160 [ 58.652161][ T7047] ksys_ioctl+0x11a/0x180 [ 58.656493][ T7047] __x64_sys_ioctl+0x6f/0xb0 [ 58.661083][ T7047] do_syscall_64+0xf6/0x7d0 [ 58.665585][ T7047] entry_SYSCALL_64_after_hwframe+0x49/0xb3 [ 58.671485][ T7047] RIP: 0033:0x45ca29 [ 58.675457][ T7047] Code: 0d b7 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 db b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00 [ 58.696264][ T7047] RSP: 002b:00007ffe58df5028 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 58.704745][ T7047] RAX: ffffffffffffffda RBX: 00000000004e1080 RCX: 000000000045ca29 [ 58.712725][ T7047] RDX: 000000000076006e RSI: 0000000040046f41 RDI: 0000000000000003 [ 58.720671][ T7047] RBP: 000000000078bf00 R08: 0000000000000000 R09: 0000000000000000 [ 58.728619][ T7047] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff [ 58.736774][ T7047] R13: 0000000000000209 R14: 00000000004c44c1 R15: 0000000001c98914 [ 58.746144][ T7047] Kernel Offset: disabled [ 58.750489][ T7047] Rebooting in 86400 seconds..