[ 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 '10.128.0.136' (ECDSA) to the list of known hosts. 2021/01/29 01:48:39 parsed 1 programs 2021/01/29 01:48:39 executed programs: 0 syzkaller login: [ 39.595867] IPVS: ftp: loaded support on port[0] = 21 [ 39.698592] chnl_net:caif_netlink_parms(): no params data found [ 39.776743] bridge0: port 1(bridge_slave_0) entered blocking state [ 39.783288] bridge0: port 1(bridge_slave_0) entered disabled state [ 39.791235] device bridge_slave_0 entered promiscuous mode [ 39.798206] bridge0: port 2(bridge_slave_1) entered blocking state [ 39.804666] bridge0: port 2(bridge_slave_1) entered disabled state [ 39.811813] device bridge_slave_1 entered promiscuous mode [ 39.829682] bond0: Enslaving bond_slave_0 as an active interface with an up link [ 39.838367] bond0: Enslaving bond_slave_1 as an active interface with an up link [ 39.857041] IPv6: ADDRCONF(NETDEV_UP): team_slave_0: link is not ready [ 39.864437] team0: Port device team_slave_0 added [ 39.870337] IPv6: ADDRCONF(NETDEV_UP): team_slave_1: link is not ready [ 39.877528] team0: Port device team_slave_1 added [ 39.893864] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 39.900154] 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. [ 39.926212] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 39.937853] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 39.944792] 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. [ 39.970632] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 39.981501] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_0: link is not ready [ 39.988795] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_1: link is not ready [ 40.009262] device hsr_slave_0 entered promiscuous mode [ 40.014911] device hsr_slave_1 entered promiscuous mode [ 40.021613] IPv6: ADDRCONF(NETDEV_UP): hsr_slave_0: link is not ready [ 40.028557] IPv6: ADDRCONF(NETDEV_UP): hsr_slave_1: link is not ready [ 40.095746] bridge0: port 2(bridge_slave_1) entered blocking state [ 40.102202] bridge0: port 2(bridge_slave_1) entered forwarding state [ 40.108990] bridge0: port 1(bridge_slave_0) entered blocking state [ 40.115350] bridge0: port 1(bridge_slave_0) entered forwarding state [ 40.148335] IPv6: ADDRCONF(NETDEV_UP): bond0: link is not ready [ 40.155766] 8021q: adding VLAN 0 to HW filter on device bond0 [ 40.165069] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 40.174114] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 40.183027] bridge0: port 1(bridge_slave_0) entered disabled state [ 40.190612] bridge0: port 2(bridge_slave_1) entered disabled state [ 40.197591] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 40.210115] IPv6: ADDRCONF(NETDEV_UP): team0: link is not ready [ 40.216184] 8021q: adding VLAN 0 to HW filter on device team0 [ 40.225812] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 40.233555] bridge0: port 1(bridge_slave_0) entered blocking state [ 40.239972] bridge0: port 1(bridge_slave_0) entered forwarding state [ 40.249521] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 40.257117] bridge0: port 2(bridge_slave_1) entered blocking state [ 40.263545] bridge0: port 2(bridge_slave_1) entered forwarding state [ 40.279455] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 40.287767] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 40.297793] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 40.309755] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 40.320068] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 40.330325] IPv6: ADDRCONF(NETDEV_UP): hsr0: link is not ready [ 40.336312] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 40.349511] IPv6: ADDRCONF(NETDEV_UP): vxcan0: link is not ready [ 40.356697] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 40.365679] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 40.377143] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 40.389736] IPv6: ADDRCONF(NETDEV_UP): veth0_virt_wifi: link is not ready [ 40.399345] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 40.430424] IPv6: ADDRCONF(NETDEV_UP): veth0_vlan: link is not ready [ 40.437566] IPv6: ADDRCONF(NETDEV_UP): vlan0: link is not ready [ 40.445566] IPv6: ADDRCONF(NETDEV_UP): vlan1: link is not ready [ 40.456075] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 40.464028] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 40.471386] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 40.481315] device veth0_vlan entered promiscuous mode [ 40.491142] device veth1_vlan entered promiscuous mode [ 40.496965] IPv6: ADDRCONF(NETDEV_UP): macvlan0: link is not ready [ 40.505872] IPv6: ADDRCONF(NETDEV_UP): macvlan1: link is not ready [ 40.517923] IPv6: ADDRCONF(NETDEV_UP): veth0_macvtap: link is not ready [ 40.527550] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan0: link becomes ready [ 40.535142] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan1: link becomes ready [ 40.542953] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 40.553093] device veth0_macvtap entered promiscuous mode [ 40.560161] IPv6: ADDRCONF(NETDEV_UP): macvtap0: link is not ready [ 40.568095] device veth1_macvtap entered promiscuous mode [ 40.577278] IPv6: ADDRCONF(NETDEV_UP): veth0_to_batadv: link is not ready [ 40.586838] IPv6: ADDRCONF(NETDEV_UP): veth1_to_batadv: link is not ready [ 40.597227] batman_adv: batadv0: Interface activated: batadv_slave_0 [ 40.604573] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 40.613447] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready [ 40.623579] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 40.630285] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 40.749368] IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready [ 40.756007] wlan0: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 40.772257] wlan0: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 40.778365] IPv6: ADDRCONF(NETDEV_UP): wlan1: link is not ready [ 40.786687] wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 40.788043] IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready [ 40.802726] wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 40.810054] IPv6: ADDRCONF(NETDEV_CHANGE): wlan1: link becomes ready [ 40.851726] EXT4-fs (loop0): mounted filesystem without journal. Opts: ,errors=continue [ 40.883381] EXT4-fs error (device loop0): ext4_validate_block_bitmap:384: comm syz-executor.0: bg 0: bad block bitmap checksum [ 40.906792] hrtimer: interrupt took 39126 ns [ 40.915720] ------------[ cut here ]------------ [ 40.920490] kernel BUG at fs/ext4/ext4.h:2870! [ 40.926683] invalid opcode: 0000 [#1] PREEMPT SMP KASAN [ 40.932067] CPU: 0 PID: 8394 Comm: syz-executor.0 Not tainted 4.19.171-syzkaller #0 [ 40.939836] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 40.949217] RIP: 0010:ext4_mb_find_by_goal+0x924/0x1340 [ 40.954556] Code: ff 48 c7 c2 00 73 7a 88 be a5 02 00 00 48 c7 c7 c0 72 7a 88 c6 05 85 89 2b 09 01 e8 a0 38 0d 06 e9 b1 f9 ff ff e8 fc 7e 7f ff <0f> 0b e8 f5 7e 7f ff 49 8d bc 24 30 04 00 00 4d 63 ef 48 b8 00 00 [ 40.973524] RSP: 0018:ffff888093d0ecc8 EFLAGS: 00010293 [ 40.978892] RAX: ffff8880ab6d6240 RBX: ffff88808b49df00 RCX: ffffffff81e2d36a [ 40.986148] RDX: 0000000000000000 RSI: ffffffff81e2db54 RDI: 0000000000000004 [ 40.993395] RBP: ffff888093d0edc0 R08: 0000000000000000 R09: 0000000000000001 [ 41.000644] R10: 0000000000000004 R11: 0000000045980749 R12: ffff8880ab1f2740 [ 41.007911] R13: 0000000000000001 R14: ffff88809e894700 R15: ffff88809e894d80 [ 41.015191] FS: 00007fd66668b700(0000) GS:ffff8880ba000000(0000) knlGS:0000000000000000 [ 41.023393] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 41.029252] CR2: 00007f8ebef23000 CR3: 00000000ab827000 CR4: 00000000001406f0 [ 41.036511] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 41.043760] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 41.051015] Call Trace: [ 41.053581] ? ext4_mb_use_best_found+0x790/0x790 [ 41.058431] ? mark_held_locks+0xf0/0xf0 [ 41.062500] ? ext4_file_write_iter+0x2fe/0xf20 [ 41.067144] ? do_iter_readv_writev+0x668/0x790 [ 41.071790] ? ext4_mb_initialize_context+0x7e5/0xbc0 [ 41.076973] ? __mutex_add_waiter+0x160/0x160 [ 41.081466] ext4_mb_regular_allocator+0x21c/0x1100 [ 41.086479] ? lock_acquire+0x170/0x3c0 [ 41.090461] ? ext4_mb_try_best_found.isra.0+0x610/0x610 [ 41.095898] ? ext4_mb_normalize_request.constprop.0+0xf61/0x15a0 [ 41.102113] ext4_mb_new_blocks+0x1b45/0x4370 [ 41.106586] ? rcu_read_lock_sched_held+0x16c/0x1d0 [ 41.111581] ? ext4_cache_extents+0x68/0x2d0 [ 41.115964] ? ext4_find_extent+0x9bb/0xc70 [ 41.120265] ? ext4_discard_preallocations+0xfb0/0xfb0 [ 41.125515] ? ext4_ext_search_right+0x2c7/0xb60 [ 41.130358] ? ext4_inode_to_goal_block+0x2d2/0x3e0 [ 41.135357] ext4_ext_map_blocks+0x2aa2/0x7390 [ 41.139924] ? __lock_acquire+0x6de/0x3ff0 [ 41.144135] ? mark_held_locks+0xf0/0xf0 [ 41.148173] ? ext4_find_delalloc_cluster+0x1f0/0x1f0 [ 41.153340] ? mark_held_locks+0xf0/0xf0 [ 41.157393] ? kmem_cache_alloc+0x122/0x370 [ 41.161706] ? alloc_buffer_head+0x20/0x130 [ 41.166015] ? alloc_page_buffers+0x169/0x5c0 [ 41.170490] ? create_page_buffers+0x212/0x350 [ 41.175062] ? __block_write_begin_int+0x22b/0x17b0 [ 41.180068] ? ext4_es_lookup_extent+0x375/0xb60 [ 41.184804] ? ext4_map_blocks+0x59f/0x1a50 [ 41.189110] ext4_map_blocks+0x7a2/0x1a50 [ 41.193249] ? ext4_issue_zeroout+0x160/0x160 [ 41.197722] ? alloc_buffer_head+0x20/0x130 [ 41.202024] ? create_page_buffers+0x212/0x350 [ 41.206586] _ext4_get_block+0x208/0x530 [ 41.210734] ? ext4_map_blocks+0x1a50/0x1a50 [ 41.215123] ? create_empty_buffers+0x4e7/0x760 [ 41.219774] ? do_raw_spin_unlock+0x171/0x230 [ 41.224245] ? _raw_spin_unlock+0x29/0x40 [ 41.228382] ? create_page_buffers+0x190/0x350 [ 41.232971] __block_write_begin_int+0x46c/0x17b0 [ 41.237791] ? _ext4_get_block+0x530/0x530 [ 41.242026] ? __breadahead_gfp+0x130/0x130 [ 41.246374] ext4_write_begin+0x52d/0x1610 [ 41.250645] ? ext4_truncate+0x1380/0x1380 [ 41.254857] ? current_time+0x6f/0x1c0 [ 41.258726] ext4_da_write_begin+0x737/0x10e0 [ 41.263219] ? mark_held_locks+0xa6/0xf0 [ 41.267262] ? iov_iter_fault_in_readable+0x1fc/0x3f0 [ 41.272448] ? ext4_write_begin+0x1610/0x1610 [ 41.276920] ? iov_iter_init+0x1d0/0x1d0 [ 41.280964] generic_perform_write+0x1f8/0x4d0 [ 41.285527] ? filemap_page_mkwrite+0x2f0/0x2f0 [ 41.290180] ? current_time+0x1c0/0x1c0 [ 41.294136] ? lock_acquire+0x170/0x3c0 [ 41.298112] __generic_file_write_iter+0x24b/0x610 [ 41.303040] ext4_file_write_iter+0x2fe/0xf20 [ 41.307517] ? __lock_acquire+0x6de/0x3ff0 [ 41.311731] ? ext4_file_open+0x600/0x600 [ 41.315861] ? common_file_perm+0x4e5/0x850 [ 41.320163] do_iter_readv_writev+0x668/0x790 [ 41.324653] ? clone_verify_area+0x240/0x240 [ 41.329041] ? security_file_permission+0x1c0/0x220 [ 41.334048] do_iter_write+0x182/0x5d0 [ 41.338012] ? rcu_read_lock_sched_held+0x16c/0x1d0 [ 41.343016] vfs_writev+0x153/0x2e0 [ 41.346639] ? vfs_iter_write+0xa0/0xa0 [ 41.350594] ? lock_downgrade+0x720/0x720 [ 41.354733] ? do_dup2+0x450/0x450 [ 41.358259] ? put_timespec64+0xcb/0x120 [ 41.362309] ? __se_compat_sys_gettimeofday+0x1b0/0x1b0 [ 41.367661] __x64_sys_pwritev+0x22b/0x310 [ 41.371875] ? __ia32_sys_preadv2+0x150/0x150 [ 41.376345] ? trace_hardirqs_off_caller+0x6e/0x210 [ 41.381353] ? do_syscall_64+0x21/0x620 [ 41.385304] do_syscall_64+0xf9/0x620 [ 41.389099] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 41.394263] RIP: 0033:0x45e219 [ 41.397466] Code: 0d b4 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 b3 fb ff c3 66 2e 0f 1f 84 00 00 00 00 [ 41.416341] RSP: 002b:00007fd66668ac68 EFLAGS: 00000246 ORIG_RAX: 0000000000000128 [ 41.424025] RAX: ffffffffffffffda RBX: 0000000000000005 RCX: 000000000045e219 [ 41.431364] RDX: 0000000000000002 RSI: 0000000020000380 RDI: 0000000000000006 [ 41.438614] RBP: 000000000119c078 R08: 000000000000001f R09: 0000000000000000 [ 41.445858] R10: 00000000ffffffff R11: 0000000000000246 R12: 000000000119c034 [ 41.453103] R13: 00007ffd092fa35f R14: 00007fd66668b9c0 R15: 000000000119c034 [ 41.460352] Modules linked in: [ 41.483523] ---[ end trace 2a3e5d86f90eeba3 ]--- [ 41.488504] RIP: 0010:ext4_mb_find_by_goal+0x924/0x1340 [ 41.488920] syz-executor.0 (8388) used greatest stack depth: 22824 bytes left [ 41.494175] Code: ff 48 c7 c2 00 73 7a 88 be a5 02 00 00 48 c7 c7 c0 72 7a 88 c6 05 85 89 2b 09 01 e8 a0 38 0d 06 e9 b1 f9 ff ff e8 fc 7e 7f ff <0f> 0b e8 f5 7e 7f ff 49 8d bc 24 30 04 00 00 4d 63 ef 48 b8 00 00 [ 41.520989] RSP: 0018:ffff888093d0ecc8 EFLAGS: 00010293 [ 41.526358] RAX: ffff8880ab6d6240 RBX: ffff88808b49df00 RCX: ffffffff81e2d36a [ 41.533696] RDX: 0000000000000000 RSI: ffffffff81e2db54 RDI: 0000000000000004 [ 41.541149] RBP: ffff888093d0edc0 R08: 0000000000000000 R09: 0000000000000001 [ 41.549099] R10: 0000000000000004 R11: 0000000045980749 R12: ffff8880ab1f2740 [ 41.556358] R13: 0000000000000001 R14: ffff88809e894700 R15: ffff88809e894d80 [ 41.563958] FS: 00007fd66668b700(0000) GS:ffff8880ba100000(0000) knlGS:0000000000000000 [ 41.572328] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 41.578268] CR2: 00007f8ebefb0000 CR3: 00000000ab827000 CR4: 00000000001406e0 [ 41.585535] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 41.592873] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 41.600194] Kernel panic - not syncing: Fatal exception [ 41.605996] Kernel Offset: disabled [ 41.609607] Rebooting in 86400 seconds..