[ 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 '10.128.15.216' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 33.937524] audit: type=1400 audit(1601788986.527:8): avc: denied { execmem } for pid=6357 comm="syz-executor467" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=process permissive=1 [ 33.972017] EXT4-fs (loop0): mounted filesystem without journal. Opts: ,errors=continue [ 33.982952] Quota error (device loop0): qtree_write_dquot: Error -669470953 occurred while creating quota [ 34.002736] Quota error (device loop0): qtree_write_dquot: Error -1224736762 occurred while creating quota [ 34.013008] EXT4-fs error (device loop0): __ext4_new_inode:930: comm syz-executor467: reserved inode found cleared - inode=1 [ 34.026778] BUG: unable to handle kernel paging request at fffffbfff6e0001f [ 34.033885] IP: dqput.part.0+0x9d/0x750 [ 34.037840] PGD 21ffec067 P4D 21ffec067 PUD 21ffeb067 PMD 0 [ 34.043635] Oops: 0000 [#1] PREEMPT SMP KASAN [ 34.048120] Modules linked in: [ 34.051496] CPU: 1 PID: 6357 Comm: syz-executor467 Not tainted 4.14.198-syzkaller #0 [ 34.059351] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 34.068682] task: ffff8880980403c0 task.stack: ffff88808a828000 [ 34.074733] RIP: 0010:dqput.part.0+0x9d/0x750 [ 34.079200] RSP: 0018:ffff88808a82f7d8 EFLAGS: 00010292 [ 34.084537] RAX: dffffc0000000000 RBX: ffffffffb7000006 RCX: 0000000000001a37 [ 34.091780] RDX: 1ffffffff0f82502 RSI: 0000000000000001 RDI: ffffffff87c12804 [ 34.099035] RBP: dffffc0000000000 R08: ffffffff8a089b38 R09: 00000000000401ca [ 34.106282] R10: ffff888098040c70 R11: ffff8880980403c0 R12: 0000000000000009 [ 34.113525] R13: fffffbfff6e0001f R14: ffffffffb700011e R15: ffffffffb70000fe [ 34.120779] FS: 0000000000bb6880(0000) GS:ffff8880aeb00000(0000) knlGS:0000000000000000 [ 34.128984] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 34.134877] CR2: fffffbfff6e0001f CR3: 000000008a0ef000 CR4: 00000000001406e0 [ 34.142132] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 34.149410] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 34.157264] Call Trace: [ 34.159847] __dquot_drop+0x193/0x250 [ 34.163632] ? dquot_scan_active+0x290/0x290 [ 34.168014] dquot_drop+0x13e/0x190 [ 34.171616] __ext4_new_inode+0x276d/0x4eb0 [ 34.175916] ? ext4_free_inode+0x1460/0x1460 [ 34.180299] ? _raw_spin_unlock+0x29/0x40 [ 34.184437] ? avc_has_extended_perms+0xbf0/0xbf0 [ 34.189276] ? dquot_initialize_needed+0x240/0x240 [ 34.194181] ext4_tmpfile+0x1bf/0x3e0 [ 34.197969] ? ext4_orphan_add+0xa70/0xa70 [ 34.202184] ? _raw_spin_unlock+0x29/0x40 [ 34.206306] ? d_alloc+0x1cc/0x240 [ 34.209835] vfs_tmpfile+0x1ef/0x330 [ 34.213523] path_openat+0x1612/0x2970 [ 34.217394] ? path_lookupat+0x780/0x780 [ 34.221429] ? trace_hardirqs_on+0x10/0x10 [ 34.225641] do_filp_open+0x179/0x3c0 [ 34.229425] ? may_open_dev+0xe0/0xe0 [ 34.233202] ? lock_downgrade+0x740/0x740 [ 34.237341] ? do_raw_spin_unlock+0x164/0x220 [ 34.241815] ? _raw_spin_unlock+0x29/0x40 [ 34.245937] ? __alloc_fd+0x1be/0x490 [ 34.249725] do_sys_open+0x296/0x410 [ 34.253430] ? filp_open+0x60/0x60 [ 34.256950] ? __close_fd+0x159/0x230 [ 34.260736] ? do_syscall_64+0x4c/0x640 [ 34.264698] ? SyS_open+0x30/0x30 [ 34.268137] do_syscall_64+0x1d5/0x640 [ 34.272009] entry_SYSCALL_64_after_hwframe+0x46/0xbb [ 34.277206] RIP: 0033:0x444969 [ 34.280370] RSP: 002b:00007ffdb50a47c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000101 [ 34.288060] RAX: ffffffffffffffda RBX: 0030656c69662f2e RCX: 0000000000444969 [ 34.295312] RDX: 0000000000410481 RSI: 0000000020000000 RDI: ffffffffffffff9c [ 34.302570] RBP: 00000000006cf018 R08: 0000000000000000 R09: 0000000000000000 [ 34.309815] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000402550 [ 34.317058] R13: 00000000004025e0 R14: 0000000000000000 R15: 0000000000000000 [ 34.324316] Code: 8d b3 18 01 00 00 49 c1 ed 03 41 83 e4 07 49 01 ed 41 83 c4 03 e8 a4 82 70 01 e8 7f 82 b7 ff 48 c7 c7 00 28 c1 87 e8 13 78 b1 04 <41> 0f b6 45 00 41 38 c4 7c 08 84 c0 0f 85 cf 04 00 00 8b 83 f8 [ 34.343402] RIP: dqput.part.0+0x9d/0x750 RSP: ffff88808a82f7d8 [ 34.349346] CR2: fffffbfff6e0001f [ 34.352777] ---[ end trace c9e094165095d80a ]--- [ 34.357512] Kernel panic - not syncing: Fatal exception [ 34.363882] Kernel Offset: disabled [ 34.367503] Rebooting in 86400 seconds..