[ 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 '10.128.0.232' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 40.612780] audit: type=1400 audit(1602565026.353:8): avc: denied { execmem } for pid=6501 comm="syz-executor986" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=process permissive=1 [ 40.642294] EXT4-fs (loop0): mounted filesystem without journal. Opts: ,errors=continue [ 40.662740] Quota error (device loop0): qtree_write_dquot: Error -927940090 occurred while creating quota [ 40.674994] BUG: unable to handle kernel paging request at fffffbfff9161860 [ 40.682454] PGD 21ffed067 P4D 21ffed067 PUD 21ffec067 PMD 0 [ 40.688407] Oops: 0000 [#1] PREEMPT SMP KASAN [ 40.693168] CPU: 0 PID: 6501 Comm: syz-executor986 Not tainted 4.19.150-syzkaller #0 [ 40.701742] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 40.711773] RIP: 0010:dquot_add_space+0x45/0x1130 [ 40.716622] Code: 4c 24 3c 4c 89 44 24 28 e8 e8 c8 9e ff 48 8d 83 00 01 00 00 48 89 c2 48 89 44 24 30 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 <80> 3c 02 00 0f 85 8a 0d 00 00 4c 8d bb c0 00 00 00 4c 8b b3 00 01 [ 40.735971] RSP: 0018:ffff8880897c7190 EFLAGS: 00010a07 [ 40.741383] RAX: dffffc0000000000 RBX: ffffffffc8b0c206 RCX: 0000000000000001 [ 40.749474] RDX: 1ffffffff9161860 RSI: ffffffff81d30978 RDI: ffffffffc8b0c206 [ 40.757028] RBP: ffff8880808053f0 R08: ffff8880897c72a0 R09: 0000000000000000 [ 40.764843] R10: 0000000000000005 R11: 0000000000000001 R12: ffff888080805990 [ 40.772808] R13: 0000000000000000 R14: ffffffffc8b0c206 R15: ffff8880897c72a0 [ 40.780618] FS: 0000000000aac880(0000) GS:ffff8880ae200000(0000) knlGS:0000000000000000 [ 40.789374] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 40.795682] CR2: fffffbfff9161860 CR3: 0000000092be2000 CR4: 00000000001406f0 [ 40.803621] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 40.811017] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 40.818698] Call Trace: [ 40.821373] ? __dquot_alloc_space+0x209/0x780 [ 40.826360] ? do_raw_spin_lock+0xcb/0x220 [ 40.830684] __dquot_alloc_space+0x44f/0x780 [ 40.835227] ? dquot_add_space+0x1130/0x1130 [ 40.839812] ? __percpu_counter_sum+0x163/0x210 [ 40.844876] ? check_preemption_disabled+0x41/0x2b0 [ 40.850171] ? percpu_counter_add_batch+0x126/0x180 [ 40.855280] ext4_mb_new_blocks+0x1ae2/0x43e0 [ 40.859930] ? ext4_discard_preallocations+0xfe0/0xfe0 [ 40.865768] ? is_bpf_text_address+0x136/0x1f0 [ 40.870504] ext4_new_meta_blocks+0x2fe/0x360 [ 40.875001] ? ext4_should_retry_alloc+0x210/0x210 [ 40.880122] ? rcu_read_lock_sched_held+0x174/0x1e0 [ 40.885222] ? ext4_get_dquots+0x9/0x20 [ 40.889423] ? dquot_initialize_needed+0x18c/0x290 [ 40.895870] ext4_xattr_block_set+0x12ea/0x2ee0 [ 40.900667] ? ext4_xattr_set_entry+0x34b0/0x34b0 [ 40.905595] ? ext4_xattr_ibody_find+0x253/0x540 [ 40.910415] ? ext4_xattr_block_find+0x5c/0x6c0 [ 40.915137] ext4_xattr_set_handle+0x9b9/0xf90 [ 40.919728] ? ext4_xattr_ibody_inline_set+0x2a0/0x2a0 [ 40.925067] ? _raw_spin_unlock+0x29/0x40 [ 40.929222] ? ext4_journal_check_start+0x185/0x220 [ 40.934561] ? ext4_get_nojournal+0x53/0xc0 [ 40.939265] ? __ext4_journal_start_sb+0x12d/0x410 [ 40.944487] ext4_xattr_set+0x135/0x2a0 [ 40.948551] ? ext4_xattr_set_credits+0x210/0x210 [ 40.953396] ? __inode_security_revalidate+0xef/0x140 [ 40.958727] ? xattr_resolve_name+0x26e/0x3d0 [ 40.963357] ? __ext4_xattr_set_credits.cold+0x3e/0x3e [ 40.968694] __vfs_setxattr+0x10e/0x170 [ 40.972758] ? xattr_resolve_name+0x3d0/0x3d0 [ 40.977699] ? evm_protect_xattr.constprop.0+0x95/0x410 [ 40.983200] __vfs_setxattr_noperm+0x11a/0x420 [ 40.987984] __vfs_setxattr_locked+0x176/0x250 [ 40.992729] vfs_setxattr+0xe5/0x270 [ 40.996778] ? __vfs_setxattr_locked+0x250/0x250 [ 41.001544] ? strncpy_from_user+0x2b1/0x370 [ 41.006229] setxattr+0x23d/0x330 [ 41.009758] ? vfs_setxattr+0x270/0x270 [ 41.013817] ? filename_lookup+0x3d5/0x5a0 [ 41.018243] ? rcu_read_lock_sched_held+0x174/0x1e0 [ 41.023840] ? rcu_sync_lockdep_assert+0x99/0x100 [ 41.028940] ? preempt_count_add+0xaf/0x190 [ 41.033260] ? __mnt_want_write+0x22c/0x2c0 [ 41.037745] path_setxattr+0x170/0x190 [ 41.041718] ? __se_sys_fsetxattr+0x1b0/0x1b0 [ 41.046554] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 41.052038] __x64_sys_setxattr+0xc0/0x160 [ 41.056453] ? lockdep_hardirqs_on+0x3c1/0x5e0 [ 41.061037] do_syscall_64+0xf9/0x670 [ 41.065015] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 41.070199] RIP: 0033:0x444709 [ 41.073449] Code: 8d d7 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 5b d7 fb ff c3 66 2e 0f 1f 84 00 00 00 00 [ 41.093071] RSP: 002b:00007ffdc08bc818 EFLAGS: 00000246 ORIG_RAX: 00000000000000bc [ 41.101314] RAX: ffffffffffffffda RBX: 0030656c69662f2e RCX: 0000000000444709 [ 41.108886] RDX: 0000000000000000 RSI: 0000000020000080 RDI: 0000000020000040 [ 41.116737] RBP: 00000000006cf018 R08: 0000000000000000 R09: 0000000000000000 [ 41.124300] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000004022f0 [ 41.131700] R13: 0000000000402380 R14: 0000000000000000 R15: 0000000000000000 [ 41.139104] Modules linked in: [ 41.142305] CR2: fffffbfff9161860 [ 41.145802] ---[ end trace 5b65117170869d36 ]--- [ 41.150666] RIP: 0010:dquot_add_space+0x45/0x1130 [ 41.155538] Code: 4c 24 3c 4c 89 44 24 28 e8 e8 c8 9e ff 48 8d 83 00 01 00 00 48 89 c2 48 89 44 24 30 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 <80> 3c 02 00 0f 85 8a 0d 00 00 4c 8d bb c0 00 00 00 4c 8b b3 00 01 [ 41.175099] RSP: 0018:ffff8880897c7190 EFLAGS: 00010a07 [ 41.180461] RAX: dffffc0000000000 RBX: ffffffffc8b0c206 RCX: 0000000000000001 [ 41.187950] RDX: 1ffffffff9161860 RSI: ffffffff81d30978 RDI: ffffffffc8b0c206 [ 41.195213] RBP: ffff8880808053f0 R08: ffff8880897c72a0 R09: 0000000000000000 [ 41.202836] R10: 0000000000000005 R11: 0000000000000001 R12: ffff888080805990 [ 41.210101] R13: 0000000000000000 R14: ffffffffc8b0c206 R15: ffff8880897c72a0 [ 41.217823] FS: 0000000000aac880(0000) GS:ffff8880ae200000(0000) knlGS:0000000000000000 [ 41.226175] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 41.232194] CR2: fffffbfff9161860 CR3: 0000000092be2000 CR4: 00000000001406f0 [ 41.239914] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 41.247428] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 41.254833] Kernel panic - not syncing: Fatal exception [ 41.262092] Kernel Offset: disabled [ 41.266123] Rebooting in 86400 seconds..