[ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... Starting Load/Save RF Kill Switch Status... [ OK ] Started Update UTMP about System Runlevel Changes. [ OK ] Started Load/Save RF Kill Switch Status. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.50' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 37.848396] IPVS: ftp: loaded support on port[0] = 21 [ 37.889730] EXT4-fs (loop0): mounted filesystem without journal. Opts: ,errors=continue [ 37.899748] Quota error (device loop0): qtree_write_dquot: Error -1986711217 occurred while creating quota [ 37.910897] EXT4-fs error (device loop0): ext4_mb_generate_buddy:744: group 0, block bitmap and bg descriptor inconsistent: 32768 vs 25 free clusters [ 37.925351] Quota error (device loop0): write_blk: dquota write failed [ 37.932257] Quota error (device loop0): qtree_write_dquot: Error -28 occurred while creating quota [ 37.946468] kasan: CONFIG_KASAN_INLINE enabled [ 37.951299] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 37.958698] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 37.964926] CPU: 0 PID: 8118 Comm: syz-executor257 Not tainted 4.19.163-syzkaller #0 [ 37.972800] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 37.982147] RIP: 0010:dqput.part.0+0x1e5/0x830 [ 37.986712] Code: 83 00 01 00 00 48 89 44 24 08 48 c1 e8 03 80 3c 28 00 0f 85 f6 04 00 00 4c 8b bb 00 01 00 00 49 8d 7f 38 48 89 fa 48 c1 ea 03 <80> 3c 2a 00 0f 85 f6 04 00 00 4d 8b 7f 38 4c 89 fa 48 c1 ea 03 80 [ 38.005613] RSP: 0018:ffff8880951178a0 EFLAGS: 00010203 [ 38.010958] RAX: 1ffffffff132a649 RBX: ffffffff8995314f RCX: 0000000000000000 [ 38.018212] RDX: 04af0d8dae81adba RSI: 0000000000000004 RDI: 25786c6d740d6dd7 [ 38.025468] RBP: dffffc0000000000 R08: 0000000000000000 R09: fffffbfff13c2500 [ 38.032741] R10: ffffffff89e12803 R11: 0000000000000001 R12: ffffffff89953247 [ 38.040013] R13: 000000000000000a R14: fffffbfff132a648 R15: 25786c6d740d6d9f [ 38.047284] FS: 0000000001bdf880(0000) GS:ffff8880ba000000(0000) knlGS:0000000000000000 [ 38.055508] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 38.061376] CR2: 00000000006d00a0 CR3: 00000000a0c98000 CR4: 00000000001406f0 [ 38.068634] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 38.075906] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 38.083163] Call Trace: [ 38.085754] __dquot_drop+0x19c/0x270 [ 38.089554] ? dquot_scan_active+0x310/0x310 [ 38.093949] ? mark_held_locks+0xa6/0xf0 [ 38.098022] ? _raw_spin_unlock_irq+0x24/0x80 [ 38.102511] dquot_drop+0x14b/0x1a0 [ 38.106141] ext4_clear_inode+0x31/0x1d0 [ 38.110194] ext4_evict_inode+0x25b/0x1780 [ 38.114434] ? ext4_journalled_write_end+0x1450/0x1450 [ 38.119709] ? ext4_journalled_write_end+0x1450/0x1450 [ 38.124980] evict+0x2ed/0x760 [ 38.128175] dispose_list+0x124/0x1f0 [ 38.132003] evict_inodes+0x341/0x430 [ 38.135804] ? dispose_list+0x1f0/0x1f0 [ 38.139759] ? filemap_write_and_wait+0x90/0xd0 [ 38.144452] ? __sync_blockdev+0x7c/0xd0 [ 38.148515] generic_shutdown_super+0xb3/0x370 [ 38.153105] kill_block_super+0x97/0xf0 [ 38.157086] deactivate_locked_super+0x94/0x160 [ 38.161746] deactivate_super+0x174/0x1a0 [ 38.165892] ? deactivate_locked_super+0x160/0x160 [ 38.170802] ? dput+0x31/0x640 [ 38.174254] cleanup_mnt+0x1a8/0x290 [ 38.177994] task_work_run+0x148/0x1c0 [ 38.181894] do_exit+0xbed/0x2be0 [ 38.185353] ? lock_downgrade+0x720/0x720 [ 38.189490] ? mm_update_next_owner+0x650/0x650 [ 38.194244] ? up_read+0x17/0x110 [ 38.197685] ? __do_page_fault+0x180/0xd60 [ 38.201924] do_group_exit+0x125/0x310 [ 38.205895] __x64_sys_exit_group+0x3a/0x50 [ 38.210214] do_syscall_64+0xf9/0x620 [ 38.214014] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 38.219186] RIP: 0033:0x443828 [ 38.222371] Code: Bad RIP value. [ 38.225743] RSP: 002b:00007ffce6a8e908 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 38.233453] RAX: ffffffffffffffda RBX: 0000000000000001 RCX: 0000000000443828 [ 38.241260] RDX: 0000000000000001 RSI: 000000000000003c RDI: 0000000000000001 [ 38.248535] RBP: 00000000004c3d10 R08: 00000000000000e7 R09: ffffffffffffffd0 [ 38.255804] R10: 00007ffce6a8e800 R11: 0000000000000246 R12: 0000000000000001 [ 38.263065] R13: 00000000006d6180 R14: 0000000000000000 R15: 0000000000000000 [ 38.270336] Modules linked in: [ 38.274049] ---[ end trace d1cbd3df0a6c51d5 ]--- [ 38.279098] RIP: 0010:dqput.part.0+0x1e5/0x830 [ 38.283756] Code: 83 00 01 00 00 48 89 44 24 08 48 c1 e8 03 80 3c 28 00 0f 85 f6 04 00 00 4c 8b bb 00 01 00 00 49 8d 7f 38 48 89 fa 48 c1 ea 03 <80> 3c 2a 00 0f 85 f6 04 00 00 4d 8b 7f 38 4c 89 fa 48 c1 ea 03 80 [ 38.303262] RSP: 0018:ffff8880951178a0 EFLAGS: 00010203 [ 38.308651] RAX: 1ffffffff132a649 RBX: ffffffff8995314f RCX: 0000000000000000 [ 38.316002] RDX: 04af0d8dae81adba RSI: 0000000000000004 RDI: 25786c6d740d6dd7 [ 38.323354] RBP: dffffc0000000000 R08: 0000000000000000 R09: fffffbfff13c2500 [ 38.331036] R10: ffffffff89e12803 R11: 0000000000000001 R12: ffffffff89953247 [ 38.338366] R13: 000000000000000a R14: fffffbfff132a648 R15: 25786c6d740d6d9f [ 38.345725] FS: 0000000001bdf880(0000) GS:ffff8880ba000000(0000) knlGS:0000000000000000 [ 38.354799] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 38.360701] CR2: 00000000004437fe CR3: 00000000a0c98000 CR4: 00000000001406f0 [ 38.368033] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 38.375473] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 38.382807] Kernel panic - not syncing: Fatal exception [ 38.388746] Kernel Offset: disabled [ 38.392361] Rebooting in 86400 seconds..