[ 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 '10.128.0.236' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 44.323933][ T6842] IPVS: ftp: loaded support on port[0] = 21 [ 44.364888][ T6842] EXT4-fs (loop0): mounted filesystem without journal. Opts: ,errors=continue [ 44.387428][ T6842] EXT4-fs (loop0): re-mounted. Opts: [ 44.395323][ T6842] Quota error (device loop0): qtree_write_dquot: Error -394896789 occurred while creating quota [ 44.409331][ T6842] EXT4-fs error (device loop0): ext4_mb_generate_buddy:808: group 0, block bitmap and bg descriptor inconsistent: 8192 vs 22 free clusters [ 44.429507][ T6842] Quota error (device loop0): write_blk: dquota write failed [ 44.437594][ T6842] Quota error (device loop0): qtree_write_dquot: Error -28 occurred while creating quota [ 44.456193][ T6842] BUG: unable to handle page fault for address: fffffbfffd0ecb6f [ 44.463901][ T6842] #PF: supervisor read access in kernel mode [ 44.469847][ T6842] #PF: error_code(0x0000) - not-present page [ 44.475788][ T6842] PGD 21ffe5067 P4D 21ffe5067 PUD 21ffe4067 PMD 0 [ 44.482261][ T6842] Oops: 0000 [#1] PREEMPT SMP KASAN [ 44.487429][ T6842] CPU: 1 PID: 6842 Comm: syz-executor578 Not tainted 5.9.0-rc7-syzkaller #0 [ 44.496064][ T6842] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 44.506124][ T6842] RIP: 0010:check_memory_region+0x80/0x2f0 [ 44.511918][ T6842] Code: 01 00 00 00 00 fc ff df 4d 01 ea 4d 89 d6 4d 29 ce 49 83 fe 10 7f 2d 4d 85 f6 0f 84 ab 01 00 00 4c 89 cb 4c 29 d3 0f 1f 40 00 <45> 0f b6 19 45 84 db 0f 85 f3 01 00 00 49 ff c1 48 ff c3 75 eb e9 [ 44.531492][ T6842] RSP: 0018:ffffc90000ec7a20 EFLAGS: 00010287 [ 44.538981][ T6842] RAX: 97d3653d8b240001 RBX: ffffffffffffffff RCX: ffffffff81e02447 [ 44.551033][ T6842] RDX: 0000000000000000 RSI: 0000000000000004 RDI: ffffffffe8765b7b [ 44.558975][ T6842] RBP: ffffffffe8765a6b R08: dffffc0000000000 R09: fffffbfffd0ecb6f [ 44.566915][ T6842] R10: fffffbfffd0ecb70 R11: 0000000000000000 R12: 1ffffffffd0ecb6f [ 44.575045][ T6842] R13: dffffc0000000001 R14: 0000000000000001 R15: ffffffffe8765b7b [ 44.583016][ T6842] FS: 0000000000000000(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 [ 44.592867][ T6842] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 44.599419][ T6842] CR2: fffffbfffd0ecb6f CR3: 000000000968d000 CR4: 00000000001506e0 [ 44.607622][ T6842] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 44.615575][ T6842] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 44.623515][ T6842] Call Trace: [ 44.626777][ T6842] dqput+0x77/0x770 [ 44.630556][ T6842] dquot_drop+0x1dd/0x2a0 [ 44.634855][ T6842] ext4_clear_inode+0x4e/0x170 [ 44.639588][ T6842] ext4_evict_inode+0x316/0x1090 [ 44.644494][ T6842] ? _raw_spin_unlock+0x24/0x40 [ 44.649313][ T6842] ? inode_wait_for_writeback+0x1e1/0x240 [ 44.655000][ T6842] ? bit_waitqueue+0x30/0x30 [ 44.659994][ T6842] ? ext4_inode_is_fast_symlink+0x390/0x390 [ 44.665857][ T6842] evict+0x2bb/0x6d0 [ 44.669721][ T6842] evict_inodes+0x608/0x690 [ 44.674195][ T6842] generic_shutdown_super+0x94/0x2a0 [ 44.679465][ T6842] kill_block_super+0x79/0xd0 [ 44.684110][ T6842] deactivate_locked_super+0xa7/0xf0 [ 44.689380][ T6842] cleanup_mnt+0x432/0x4e0 [ 44.693765][ T6842] task_work_run+0x137/0x1c0 [ 44.698324][ T6842] do_exit+0x5f3/0x1f20 [ 44.702449][ T6842] do_group_exit+0x161/0x2d0 [ 44.707026][ T6842] __do_sys_exit_group+0x13/0x20 [ 44.711931][ T6842] __se_sys_exit_group+0x10/0x10 [ 44.716835][ T6842] __x64_sys_exit_group+0x37/0x40 [ 44.721826][ T6842] do_syscall_64+0x31/0x70 [ 44.726661][ T6842] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 44.733478][ T6842] RIP: 0033:0x443a18 [ 44.737339][ T6842] Code: Bad RIP value. [ 44.741373][ T6842] RSP: 002b:00007ffc830da698 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 44.749749][ T6842] RAX: ffffffffffffffda RBX: 0000000000000001 RCX: 0000000000443a18 [ 44.757691][ T6842] RDX: 0000000000000001 RSI: 000000000000003c RDI: 0000000000000001 [ 44.766242][ T6842] RBP: 00000000004c3eb0 R08: 00000000000000e7 R09: ffffffffffffffd0 [ 44.774197][ T6842] R10: 00007ffc830da580 R11: 0000000000000246 R12: 0000000000000001 [ 44.782152][ T6842] R13: 00000000006d6180 R14: 0000000000000000 R15: 0000000000000000 [ 44.790095][ T6842] Modules linked in: [ 44.793963][ T6842] CR2: fffffbfffd0ecb6f [ 44.798090][ T6842] ---[ end trace cbb09b62a3880c7d ]--- [ 44.803534][ T6842] RIP: 0010:check_memory_region+0x80/0x2f0 [ 44.809309][ T6842] Code: 01 00 00 00 00 fc ff df 4d 01 ea 4d 89 d6 4d 29 ce 49 83 fe 10 7f 2d 4d 85 f6 0f 84 ab 01 00 00 4c 89 cb 4c 29 d3 0f 1f 40 00 <45> 0f b6 19 45 84 db 0f 85 f3 01 00 00 49 ff c1 48 ff c3 75 eb e9 [ 44.829920][ T6842] RSP: 0018:ffffc90000ec7a20 EFLAGS: 00010287 [ 44.835966][ T6842] RAX: 97d3653d8b240001 RBX: ffffffffffffffff RCX: ffffffff81e02447 [ 44.843921][ T6842] RDX: 0000000000000000 RSI: 0000000000000004 RDI: ffffffffe8765b7b [ 44.851862][ T6842] RBP: ffffffffe8765a6b R08: dffffc0000000000 R09: fffffbfffd0ecb6f [ 44.859805][ T6842] R10: fffffbfffd0ecb70 R11: 0000000000000000 R12: 1ffffffffd0ecb6f [ 44.867746][ T6842] R13: dffffc0000000001 R14: 0000000000000001 R15: ffffffffe8765b7b [ 44.875707][ T6842] FS: 0000000000000000(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 [ 44.884602][ T6842] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 44.891153][ T6842] CR2: fffffbfffd0ecb6f CR3: 000000000968d000 CR4: 00000000001506e0 [ 44.899098][ T6842] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 44.907735][ T6842] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 44.915676][ T6842] Kernel panic - not syncing: Fatal exception [ 44.923019][ T6842] Kernel Offset: disabled [ 44.927330][ T6842] Rebooting in 86400 seconds..