[ 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 '10.128.0.138' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 86.162356] audit: type=1400 audit(1596852469.557:8): avc: denied { execmem } for pid=6356 comm="syz-executor653" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=process permissive=1 [ 86.185750] IPVS: ftp: loaded support on port[0] = 21 [ 86.222910] IPVS: ftp: loaded support on port[0] = 21 executing program [ 86.277720] IPVS: ftp: loaded support on port[0] = 21 executing program [ 86.336031] EXT4-fs error (device sda1): mb_free_blocks:1464: group 8, inode 15713: block 282656:freeing already freed block (bit 20512); block bitmap corrupt. [ 86.352082] EXT4-fs error (device sda1): ext4_mb_generate_buddy:754: group 8, block bitmap and bg descriptor inconsistent: 12247 vs 12256 free clusters [ 86.366210] EXT4-fs (sda1): pa ffff88808d840b38: logic 32768, phys. 282624, len 2048 [ 86.374152] EXT4-fs error (device sda1): ext4_mb_release_inode_pa:3891: group 8, free 2016, pa_free 2007 executing program [ 86.392233] IPVS: ftp: loaded support on port[0] = 21 executing program executing program executing program executing program [ 86.497228] IPVS: ftp: loaded support on port[0] = 21 executing program executing program [ 86.545223] EXT4-fs error (device sda1): mb_free_blocks:1464: group 6, inode 15715: block 219168:freeing already freed block (bit 22560); block bitmap corrupt. [ 86.559951] EXT4-fs error (device sda1): ext4_mb_generate_buddy:754: group 6, block bitmap and bg descriptor inconsistent: 4063 vs 4072 free clusters [ 86.573914] EXT4-fs (sda1): pa ffff888082a764b8: logic 32768, phys. 219136, len 2048 [ 86.581911] EXT4-fs error (device sda1): ext4_mb_release_inode_pa:3891: group 6, free 2016, pa_free 2007 executing program executing program [ 86.668137] EXT4-fs error (device sda1): mb_free_blocks:1464: group 15, inode 15712: block 520224:freeing already freed block (bit 28704); block bitmap corrupt. [ 86.682928] EXT4-fs error (device sda1): ext4_mb_generate_buddy:754: group 15, block bitmap and bg descriptor inconsistent: 3807 vs 3816 free clusters [ 86.697372] EXT4-fs (sda1): pa ffff88808d8403a0: logic 32768, phys. 520192, len 2048 [ 86.705266] EXT4-fs error (device sda1): ext4_mb_release_inode_pa:3891: group 15, free 2016, pa_free 2007 executing program executing program [ 86.727848] IPVS: ftp: loaded support on port[0] = 21 executing program [ 86.757792] EXT4-fs error (device sda1): mb_free_blocks:1464: group 10, inode 15724: block 358400:freeing already freed block (bit 30720); block bitmap corrupt. [ 86.769787] EXT4-fs (sda1): pa ffff888082b14ca8: logic 32768, phys. 432128, len 2048 [ 86.773641] EXT4-fs (sda1): pa ffff888082b01ce8: logic 0, phys. 358400, len 32 executing program executing program executing program executing program [ 86.871310] EXT4-fs (sda1): pa ffff888082b14870: logic 32768, phys. 397312, len 2048 executing program executing program executing program [ 86.962167] EXT4-fs (sda1): pa ffff888082b01478: logic 0, phys. 389120, len 32 executing program executing program executing program [ 87.016675] EXT4-fs (sda1): pa ffff888082b01118: logic 32768, phys. 229378, len 2046 executing program executing program executing program [ 87.060235] EXT4-fs (sda1): pa ffff888082baae58: logic 32768, phys. 22191, len 2048 executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 87.296898] EXT4-fs (sda1): pa ffff888082be7628: logic 0, phys. 321544, len 32 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 89.285886] rxrpc: AF_RXRPC: Leaked local ffff88808504d6c0 {1} [ 89.292378] ------------[ cut here ]------------ [ 89.297295] kernel BUG at net/rxrpc/local_object.c:408! [ 89.307124] audit: type=1800 audit(1596852472.708:9): pid=6804 uid=0 auid=0 ses=5 subj=system_u:system_r:kernel_t:s0 op="collect_data" cause="failed" comm="syz-executor653" name="bus" dev="sda1" ino=15691 res=0 [ 89.330732] invalid opcode: 0000 [#1] PREEMPT SMP KASAN [ 89.336123] Modules linked in: [ 89.339325] CPU: 0 PID: 5 Comm: kworker/u4:0 Not tainted 4.14.193-syzkaller #0 [ 89.346765] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 89.356126] Workqueue: netns cleanup_net [ 89.360189] task: ffff8880a9832140 task.stack: ffff8880a9838000 [ 89.366248] RIP: 0010:rxrpc_destroy_all_locals+0xe6/0xf2 [ 89.371698] RSP: 0018:ffff8880a983fc28 EFLAGS: 00010286 [ 89.377153] RAX: dffffc0000000000 RBX: ffff88808bd10a00 RCX: fffffbfff14b4980 [ 89.384503] RDX: 0000000000000000 RSI: 0000000000000004 RDI: 0000000000000286 [ 89.391775] RBP: ffff88808bd10a20 R08: ffff8880a9832140 R09: dffffc0000000000 [ 89.399050] R10: 0000000000000000 R11: 0000000000000000 R12: ffff88808bd10a20 [ 89.406417] R13: ffff88808bd10a30 R14: dffffc0000000000 R15: fffffbfff10fe3d7 [ 89.413860] FS: 0000000000000000(0000) GS:ffff8880aea00000(0000) knlGS:0000000000000000 [ 89.423770] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 89.430354] CR2: 0000000000000000 CR3: 000000008b38d000 CR4: 00000000001406f0 [ 89.437712] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 89.444980] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 89.452246] Call Trace: [ 89.454839] rxrpc_exit_net+0x158/0x260 [ 89.458824] ? rxrpc_destroy_all_locals.cold+0x65/0x65 [ 89.464102] ops_exit_list+0xa5/0x150 [ 89.467910] cleanup_net+0x3b3/0x840 [ 89.471627] ? net_drop_ns+0x70/0x70 [ 89.475341] ? lock_acquire+0x170/0x3f0 [ 89.479322] ? rcu_lockdep_current_cpu_online+0xed/0x140 [ 89.484775] process_one_work+0x793/0x14a0 [ 89.489011] ? work_busy+0x320/0x320 [ 89.492726] ? worker_thread+0x158/0xff0 [ 89.496788] ? _raw_spin_unlock_irq+0x24/0x80 [ 89.501301] worker_thread+0x5cc/0xff0 [ 89.505196] ? rescuer_thread+0xc80/0xc80 [ 89.509341] kthread+0x30d/0x420 [ 89.512705] ? kthread_create_on_node+0xd0/0xd0 [ 89.517378] ret_from_fork+0x24/0x30 executing program executing program executing program [ 89.521092] Code: 00 00 00 00 00 fc ff df 48 83 eb 20 e8 44 1d 8c fb 4c 8d 63 20 4c 39 e5 0f 85 52 00 00 00 e8 32 1d 8c fb 4c 89 ef e8 7a 20 84 00 <0f> 0b 48 89 ef e8 10 e8 b5 fb eb c0 e8 19 1d 8c fb 48 c7 c7 20 [ 89.540363] RIP: rxrpc_destroy_all_locals+0xe6/0xf2 RSP: ffff8880a983fc28 executing program [ 89.596399] ---[ end trace 83077fe99f72ee29 ]--- [ 89.602502] Kernel panic - not syncing: Fatal exception [ 89.610235] Kernel Offset: disabled [ 89.613856] Rebooting in 86400 seconds..