[ OK ] Started Getty on tty1. [ OK ] Started Getty on tty2. [ OK ] Started Serial Getty on ttyS0. [ 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. Starting Load/Save RF Kill Switch Status... [ OK ] Started Load/Save RF Kill Switch Status. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.153' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 41.056517] audit: type=1400 audit(1602657072.600:8): avc: denied { execmem } for pid=6500 comm="syz-executor094" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=process permissive=1 [ 41.070806] IPVS: ftp: loaded support on port[0] = 21 [ 41.125402] EXT4-fs (loop0): mounted filesystem without journal. Opts: ,errors=continue [ 41.134985] Quota error (device loop0): qtree_write_dquot: Error -2147481216 occurred while creating quota [ 41.168501] BUG: unable to handle kernel paging request at fffffbfff000014f [ 41.175755] PGD 21ffed067 P4D 21ffed067 PUD 21ffec067 PMD 0 [ 41.181572] Oops: 0000 [#1] PREEMPT SMP KASAN [ 41.186093] CPU: 0 PID: 6501 Comm: syz-executor094 Not tainted 4.19.150-syzkaller #0 [ 41.193952] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 41.203293] RIP: 0010:check_memory_region+0xc8/0x170 [ 41.208374] Code: 39 d0 74 0e 80 38 00 74 f2 48 85 c0 0f 85 9c 00 00 00 5b 5d 41 5c c3 48 85 d2 74 f6 48 01 ea eb 09 48 83 c0 01 48 39 d0 74 e8 <80> 38 00 74 f2 eb d8 41 bc 08 00 00 00 48 89 ea 45 29 dc 4e 8d 5c [ 41.227253] RSP: 0018:ffff8880a47c7870 EFLAGS: 00010296 [ 41.232597] RAX: fffffbfff000014f RBX: fffffbfff0000150 RCX: ffffffff81d2475e [ 41.239845] RDX: fffffbfff0000150 RSI: 0000000000000004 RDI: ffffffff80000a78 [ 41.247091] RBP: fffffbfff000014f R08: 0000000000000000 R09: fffffbfff000014f [ 41.254336] R10: ffffffff80000a7b R11: 0000000000000001 R12: ffffffff80000a78 [ 41.261589] R13: 0000000000000003 R14: fffffbfff000014f R15: ffff888080039718 [ 41.268839] FS: 00000000023c4880(0000) GS:ffff8880ae200000(0000) knlGS:0000000000000000 [ 41.277056] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 41.282920] CR2: fffffbfff000014f CR3: 0000000099b31000 CR4: 00000000001406f0 [ 41.290184] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 41.297429] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 41.304676] Call Trace: [ 41.307275] dqput.part.0+0xae/0x850 [ 41.310969] __dquot_drop+0x1c6/0x2a0 [ 41.314747] ? dquot_scan_active+0x310/0x310 [ 41.319132] ? _raw_spin_unlock_irq+0x24/0x90 [ 41.323608] ? lockdep_hardirqs_on+0x3c1/0x5e0 [ 41.328166] dquot_drop+0x14b/0x1a0 [ 41.331771] ext4_clear_inode+0x31/0x1d0 [ 41.335814] ext4_evict_inode+0x25b/0x1830 [ 41.340062] ? ext4_journalled_write_end+0x14b0/0x14b0 [ 41.345316] ? ext4_journalled_write_end+0x14b0/0x14b0 [ 41.350587] evict+0x2ed/0x780 [ 41.353757] dispose_list+0x124/0x1f0 [ 41.357596] evict_inodes+0x341/0x430 [ 41.361409] ? dispose_list+0x1f0/0x1f0 [ 41.365403] ? filemap_write_and_wait+0x90/0xd0 [ 41.370061] ? __sync_blockdev+0x7c/0xd0 [ 41.374105] generic_shutdown_super+0xb3/0x370 [ 41.378669] kill_block_super+0x97/0xf0 [ 41.382719] deactivate_locked_super+0x8c/0x100 [ 41.387364] deactivate_super+0x174/0x1a0 [ 41.391503] ? deactivate_locked_super+0x100/0x100 [ 41.396426] ? dput+0x31/0x6a0 [ 41.399600] cleanup_mnt+0x1da/0x300 [ 41.403320] task_work_run+0x141/0x1c0 [ 41.407186] do_exit+0xc09/0x2d80 [ 41.410618] ? mm_update_next_owner+0x660/0x660 [ 41.415264] ? up_read+0x17/0x110 [ 41.418696] ? __do_page_fault+0x1ca/0xe00 [ 41.422910] do_group_exit+0x125/0x320 [ 41.426776] __x64_sys_exit_group+0x3a/0x50 [ 41.431074] do_syscall_64+0xf9/0x670 [ 41.434856] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 41.440024] RIP: 0033:0x443918 [ 41.443293] Code: Bad RIP value. [ 41.446635] RSP: 002b:00007ffeaad2c368 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 41.454332] RAX: ffffffffffffffda RBX: 0000000000000001 RCX: 0000000000443918 [ 41.461579] RDX: 0000000000000001 RSI: 000000000000003c RDI: 0000000000000001 [ 41.468827] RBP: 00000000004c3e30 R08: 00000000000000e7 R09: ffffffffffffffd0 [ 41.476093] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001 [ 41.483358] R13: 00000000006d6180 R14: 0000000000000000 R15: 0000000000000000 [ 41.490609] Modules linked in: [ 41.493792] CR2: fffffbfff000014f [ 41.497226] ---[ end trace b26dab5c4ecd8850 ]--- [ 41.501964] RIP: 0010:check_memory_region+0xc8/0x170 [ 41.507150] Code: 39 d0 74 0e 80 38 00 74 f2 48 85 c0 0f 85 9c 00 00 00 5b 5d 41 5c c3 48 85 d2 74 f6 48 01 ea eb 09 48 83 c0 01 48 39 d0 74 e8 <80> 38 00 74 f2 eb d8 41 bc 08 00 00 00 48 89 ea 45 29 dc 4e 8d 5c [ 41.526049] RSP: 0018:ffff8880a47c7870 EFLAGS: 00010296 [ 41.531394] RAX: fffffbfff000014f RBX: fffffbfff0000150 RCX: ffffffff81d2475e [ 41.538654] RDX: fffffbfff0000150 RSI: 0000000000000004 RDI: ffffffff80000a78 [ 41.545906] RBP: fffffbfff000014f R08: 0000000000000000 R09: fffffbfff000014f [ 41.553170] R10: ffffffff80000a7b R11: 0000000000000001 R12: ffffffff80000a78 [ 41.560417] R13: 0000000000000003 R14: fffffbfff000014f R15: ffff888080039718 [ 41.567667] FS: 00000000023c4880(0000) GS:ffff8880ae200000(0000) knlGS:0000000000000000 [ 41.575888] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 41.581760] CR2: 00000000004438ee CR3: 0000000099b31000 CR4: 00000000001406f0 [ 41.589012] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 41.596259] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 41.603508] Kernel panic - not syncing: Fatal exception [ 41.610054] Kernel Offset: disabled [ 41.613686] Rebooting in 86400 seconds..