Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.206' (ECDSA) to the list of known hosts. 2021/07/10 14:54:28 parsed 1 programs 2021/07/10 14:54:28 executed programs: 0 syzkaller login: [ 34.020947] IPVS: ftp: loaded support on port[0] = 21 [ 34.117656] chnl_net:caif_netlink_parms(): no params data found [ 34.222636] bridge0: port 1(bridge_slave_0) entered blocking state [ 34.229630] bridge0: port 1(bridge_slave_0) entered disabled state [ 34.237170] device bridge_slave_0 entered promiscuous mode [ 34.244281] bridge0: port 2(bridge_slave_1) entered blocking state [ 34.250933] bridge0: port 2(bridge_slave_1) entered disabled state [ 34.257952] device bridge_slave_1 entered promiscuous mode [ 34.274657] bond0: Enslaving bond_slave_0 as an active interface with an up link [ 34.283310] bond0: Enslaving bond_slave_1 as an active interface with an up link [ 34.301444] IPv6: ADDRCONF(NETDEV_UP): team_slave_0: link is not ready [ 34.308799] team0: Port device team_slave_0 added [ 34.314183] IPv6: ADDRCONF(NETDEV_UP): team_slave_1: link is not ready [ 34.322553] team0: Port device team_slave_1 added [ 34.338821] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 34.345101] 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. [ 34.370576] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 34.381899] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 34.388221] 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. [ 34.413698] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 34.424562] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_0: link is not ready [ 34.432339] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_1: link is not ready [ 34.451358] device hsr_slave_0 entered promiscuous mode [ 34.457141] device hsr_slave_1 entered promiscuous mode [ 34.463059] IPv6: ADDRCONF(NETDEV_UP): hsr_slave_0: link is not ready [ 34.470278] IPv6: ADDRCONF(NETDEV_UP): hsr_slave_1: link is not ready [ 34.533520] bridge0: port 2(bridge_slave_1) entered blocking state [ 34.539979] bridge0: port 2(bridge_slave_1) entered forwarding state [ 34.546836] bridge0: port 1(bridge_slave_0) entered blocking state [ 34.553178] bridge0: port 1(bridge_slave_0) entered forwarding state [ 34.582867] IPv6: ADDRCONF(NETDEV_UP): bond0: link is not ready [ 34.589877] 8021q: adding VLAN 0 to HW filter on device bond0 [ 34.598527] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 34.607346] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 34.616613] bridge0: port 1(bridge_slave_0) entered disabled state [ 34.623543] bridge0: port 2(bridge_slave_1) entered disabled state [ 34.631543] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 34.642350] IPv6: ADDRCONF(NETDEV_UP): team0: link is not ready [ 34.648711] 8021q: adding VLAN 0 to HW filter on device team0 [ 34.657691] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 34.665494] bridge0: port 1(bridge_slave_0) entered blocking state [ 34.671873] bridge0: port 1(bridge_slave_0) entered forwarding state [ 34.692802] hsr0: Slave A (hsr_slave_0) is not up; please bring it up to get a fully working HSR network [ 34.702850] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network [ 34.714454] IPv6: ADDRCONF(NETDEV_UP): hsr0: link is not ready [ 34.722884] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 34.730548] bridge0: port 2(bridge_slave_1) entered blocking state [ 34.736918] bridge0: port 2(bridge_slave_1) entered forwarding state [ 34.744622] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 34.752651] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 34.760525] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 34.768206] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 34.777623] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 34.784375] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 34.795549] IPv6: ADDRCONF(NETDEV_UP): vxcan0: link is not ready [ 34.802736] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 34.809963] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 34.820320] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 34.834299] IPv6: ADDRCONF(NETDEV_UP): veth0_virt_wifi: link is not ready [ 34.843830] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 34.872810] IPv6: ADDRCONF(NETDEV_UP): veth0_vlan: link is not ready [ 34.880206] IPv6: ADDRCONF(NETDEV_UP): vlan0: link is not ready [ 34.888414] IPv6: ADDRCONF(NETDEV_UP): vlan1: link is not ready [ 34.897640] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 34.905360] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 34.912162] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 34.921512] device veth0_vlan entered promiscuous mode [ 34.930196] device veth1_vlan entered promiscuous mode [ 34.936446] IPv6: ADDRCONF(NETDEV_UP): macvlan0: link is not ready [ 34.944485] IPv6: ADDRCONF(NETDEV_UP): macvlan1: link is not ready [ 34.956677] IPv6: ADDRCONF(NETDEV_UP): veth0_macvtap: link is not ready [ 34.967293] device veth0_macvtap entered promiscuous mode [ 34.973365] IPv6: ADDRCONF(NETDEV_UP): macvtap0: link is not ready [ 34.980643] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan0: link becomes ready [ 34.988244] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan1: link becomes ready [ 34.996163] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 35.003660] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready [ 35.012981] device veth1_macvtap entered promiscuous mode [ 35.021151] IPv6: ADDRCONF(NETDEV_UP): veth0_to_batadv: link is not ready [ 35.031000] IPv6: ADDRCONF(NETDEV_UP): veth1_to_batadv: link is not ready [ 35.040897] batman_adv: batadv0: Interface activated: batadv_slave_0 [ 35.048627] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 35.059356] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 35.066447] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 35.168499] IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready [ 35.175697] wlan0: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 35.182868] wlan0: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 35.202050] IPv6: ADDRCONF(NETDEV_UP): wlan1: link is not ready [ 35.208317] IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready [ 35.216237] wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 35.223381] wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 35.230163] IPv6: ADDRCONF(NETDEV_CHANGE): wlan1: link becomes ready [ 35.857273] ================================================================== [ 35.864764] BUG: KASAN: use-after-free in vgem_gem_dumb_create+0x22c/0x240 [ 35.871843] Read of size 8 at addr ffff8880a9b4ebc0 by task syz-executor.0/8524 [ 35.879261] [ 35.880873] CPU: 1 PID: 8524 Comm: syz-executor.0 Not tainted 4.19.196-syzkaller #0 [ 35.888641] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 35.898009] Call Trace: [ 35.900580] dump_stack+0x1fc/0x2ef [ 35.904211] print_address_description.cold+0x54/0x219 [ 35.909468] kasan_report_error.cold+0x8a/0x1b9 [ 35.914119] ? vgem_gem_dumb_create+0x22c/0x240 [ 35.918877] __asan_report_load8_noabort+0x88/0x90 [ 35.923793] ? drm_gem_object_put_unlocked+0x20/0x180 [ 35.928964] ? vgem_gem_dumb_create+0x22c/0x240 [ 35.933614] vgem_gem_dumb_create+0x22c/0x240 [ 35.938095] drm_mode_create_dumb+0x27c/0x300 [ 35.942573] drm_ioctl_kernel+0x208/0x2a0 [ 35.946701] ? drm_mode_create_dumb+0x300/0x300 [ 35.951371] ? drm_ioctl_permit+0x210/0x210 [ 35.955674] ? __might_fault+0x192/0x1d0 [ 35.959733] drm_ioctl+0x507/0x9c0 [ 35.963252] ? drm_mode_create_dumb+0x300/0x300 [ 35.967898] ? drm_getstats+0x20/0x20 [ 35.971819] ? debug_check_no_obj_freed+0x201/0x490 [ 35.976823] ? futex_exit_release+0x220/0x220 [ 35.981304] ? lock_acquire+0x170/0x3c0 [ 35.985302] ? debug_check_no_obj_freed+0xb5/0x490 [ 35.990206] ? drm_getstats+0x20/0x20 [ 35.993986] do_vfs_ioctl+0xcdb/0x12e0 [ 35.997995] ? lock_downgrade+0x720/0x720 [ 36.002154] ? check_preemption_disabled+0x41/0x280 [ 36.007160] ? ioctl_preallocate+0x200/0x200 [ 36.011550] ? __fget+0x356/0x510 [ 36.014989] ? do_dup2+0x450/0x450 [ 36.018610] ? __se_sys_futex+0x298/0x3b0 [ 36.022739] ksys_ioctl+0x9b/0xc0 [ 36.026180] __x64_sys_ioctl+0x6f/0xb0 [ 36.030056] ? lockdep_hardirqs_on+0x3a8/0x5c0 [ 36.034621] do_syscall_64+0xf9/0x620 [ 36.038417] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 36.043586] RIP: 0033:0x4665d9 [ 36.046950] Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48 [ 36.065868] RSP: 002b:00007f312f63e188 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 36.073569] RAX: ffffffffffffffda RBX: 000000000056bf80 RCX: 00000000004665d9 [ 36.080818] RDX: 00000000200000c0 RSI: 00000000c02064b2 RDI: 0000000000000005 [ 36.088069] RBP: 00000000004bfcb9 R08: 0000000000000000 R09: 0000000000000000 [ 36.095329] R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf80 [ 36.102579] R13: 00007ffda98633bf R14: 00007f312f63e300 R15: 0000000000022000 [ 36.109837] [ 36.111444] Allocated by task 8524: [ 36.115059] kmem_cache_alloc_trace+0x12f/0x380 [ 36.119709] __vgem_gem_create+0x44/0xf0 [ 36.123767] vgem_gem_dumb_create+0xcf/0x240 [ 36.128164] drm_mode_create_dumb+0x27c/0x300 [ 36.132641] drm_ioctl_kernel+0x208/0x2a0 [ 36.136780] drm_ioctl+0x507/0x9c0 [ 36.140313] do_vfs_ioctl+0xcdb/0x12e0 [ 36.144193] ksys_ioctl+0x9b/0xc0 [ 36.147625] __x64_sys_ioctl+0x6f/0xb0 [ 36.151499] do_syscall_64+0xf9/0x620 [ 36.155283] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 36.160445] [ 36.162047] Freed by task 8524: [ 36.165304] kfree+0xcc/0x210 [ 36.168388] drm_gem_object_free+0x91/0x1c0 [ 36.172687] drm_gem_object_put_unlocked+0xd1/0x180 [ 36.177686] vgem_gem_dumb_create+0x10c/0x240 [ 36.182254] drm_mode_create_dumb+0x27c/0x300 [ 36.186813] drm_ioctl_kernel+0x208/0x2a0 [ 36.190946] drm_ioctl+0x507/0x9c0 [ 36.194463] do_vfs_ioctl+0xcdb/0x12e0 [ 36.198343] ksys_ioctl+0x9b/0xc0 [ 36.201776] __x64_sys_ioctl+0x6f/0xb0 [ 36.205640] do_syscall_64+0xf9/0x620 [ 36.209430] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 36.214590] [ 36.216197] The buggy address belongs to the object at ffff8880a9b4eac0 [ 36.216197] which belongs to the cache kmalloc-512 of size 512 [ 36.228833] The buggy address is located 256 bytes inside of [ 36.228833] 512-byte region [ffff8880a9b4eac0, ffff8880a9b4ecc0) [ 36.240693] The buggy address belongs to the page: [ 36.245687] page:ffffea0002a6d380 count:1 mapcount:0 mapping:ffff88813bff0940 index:0x0 [ 36.253805] flags: 0xfff00000000100(slab) [ 36.257932] raw: 00fff00000000100 ffffea0002a7b648 ffffea0002abd588 ffff88813bff0940 [ 36.265795] raw: 0000000000000000 ffff8880a9b4e0c0 0000000100000006 0000000000000000 [ 36.273651] page dumped because: kasan: bad access detected [ 36.279333] [ 36.280935] Memory state around the buggy address: [ 36.285839] ffff8880a9b4ea80: fc fc fc fc fc fc fc fc fb fb fb fb fb fb fb fb [ 36.293178] ffff8880a9b4eb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 36.300524] >ffff8880a9b4eb80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 36.307874] ^ [ 36.313309] ffff8880a9b4ec00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 36.320660] ffff8880a9b4ec80: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 36.328019] ================================================================== [ 36.335370] Disabling lock debugging due to kernel taint [ 36.346743] Kernel panic - not syncing: panic_on_warn set ... [ 36.346743] [ 36.354206] CPU: 1 PID: 8524 Comm: syz-executor.0 Tainted: G B 4.19.196-syzkaller #0 [ 36.355718] Bluetooth: hci0: command 0x0409 tx timeout [ 36.363379] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 36.377971] Call Trace: [ 36.380556] dump_stack+0x1fc/0x2ef [ 36.384322] panic+0x26a/0x50e [ 36.387515] ? __warn_printk+0xf3/0xf3 [ 36.391401] ? preempt_schedule_common+0x45/0xc0 [ 36.396150] ? ___preempt_schedule+0x16/0x18 [ 36.400563] ? trace_hardirqs_on+0x55/0x210 [ 36.404882] kasan_end_report+0x43/0x49 [ 36.408833] kasan_report_error.cold+0xa7/0x1b9 [ 36.413492] ? vgem_gem_dumb_create+0x22c/0x240 [ 36.418142] __asan_report_load8_noabort+0x88/0x90 [ 36.423058] ? drm_gem_object_put_unlocked+0x20/0x180 [ 36.428235] ? vgem_gem_dumb_create+0x22c/0x240 [ 36.432881] vgem_gem_dumb_create+0x22c/0x240 [ 36.437355] drm_mode_create_dumb+0x27c/0x300 [ 36.441852] drm_ioctl_kernel+0x208/0x2a0 [ 36.445983] ? drm_mode_create_dumb+0x300/0x300 [ 36.450629] ? drm_ioctl_permit+0x210/0x210 [ 36.454930] ? __might_fault+0x192/0x1d0 [ 36.458968] drm_ioctl+0x507/0x9c0 [ 36.462487] ? drm_mode_create_dumb+0x300/0x300 [ 36.467149] ? drm_getstats+0x20/0x20 [ 36.470928] ? debug_check_no_obj_freed+0x201/0x490 [ 36.475922] ? futex_exit_release+0x220/0x220 [ 36.480392] ? lock_acquire+0x170/0x3c0 [ 36.484356] ? debug_check_no_obj_freed+0xb5/0x490 [ 36.489260] ? drm_getstats+0x20/0x20 [ 36.493051] do_vfs_ioctl+0xcdb/0x12e0 [ 36.496919] ? lock_downgrade+0x720/0x720 [ 36.501130] ? check_preemption_disabled+0x41/0x280 [ 36.506133] ? ioctl_preallocate+0x200/0x200 [ 36.510526] ? __fget+0x356/0x510 [ 36.513957] ? do_dup2+0x450/0x450 [ 36.517471] ? __se_sys_futex+0x298/0x3b0 [ 36.521598] ksys_ioctl+0x9b/0xc0 [ 36.525031] __x64_sys_ioctl+0x6f/0xb0 [ 36.528899] ? lockdep_hardirqs_on+0x3a8/0x5c0 [ 36.533466] do_syscall_64+0xf9/0x620 [ 36.537246] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 36.542413] RIP: 0033:0x4665d9 [ 36.545587] Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48 [ 36.564463] RSP: 002b:00007f312f63e188 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 36.572147] RAX: ffffffffffffffda RBX: 000000000056bf80 RCX: 00000000004665d9 [ 36.579394] RDX: 00000000200000c0 RSI: 00000000c02064b2 RDI: 0000000000000005 [ 36.586736] RBP: 00000000004bfcb9 R08: 0000000000000000 R09: 0000000000000000 [ 36.593983] R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf80 [ 36.601226] R13: 00007ffda98633bf R14: 00007f312f63e300 R15: 0000000000022000 [ 36.609751] Kernel Offset: disabled [ 36.613357] Rebooting in 86400 seconds..