[ 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 '10.128.1.47' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 114.526130] gfs2: fsid=syz:syz: Trying to join cluster "lock_nolock", "syz:syz" [ 114.537264] gfs2: fsid=syz:syz: Now mounting FS... [ 114.551003] gfs2: fsid=syz:syz.0: journal 0 mapped with 3 extents [ 114.560289] gfs2: fsid=syz:syz.0: jid=0, already locked for use [ 114.566738] gfs2: fsid=syz:syz.0: jid=0: Looking at journal... [ 114.577910] gfs2: fsid=syz:syz.0: jid=0: Done [ 114.582676] gfs2: fsid=syz:syz.0: first mount done, others may mount executing program [ 114.802304] gfs2: fsid=syz:syz.0: found 2 quota changes executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 175.162608] gfs2: original: do_sync+0x3f0/0xba0 [ 175.167581] gfs2: pid: 7985 [ 175.170515] gfs2: lock type: 8 req lock state : 1 [ 175.175541] gfs2: new: do_sync+0x3f0/0xba0 [ 175.179788] gfs2: pid: 7985 [ 175.182762] gfs2: lock type: 8 req lock state : 1 [ 175.187622] gfs2: G: s:EX n:8/1 f:qb t:EX d:EX/0 a:0 v:0 r:5 m:20 [ 175.194004] gfs2: H: s:EX f:cH e:0 p:7985 [gfs2_quotad] do_sync+0x3f0/0xba0 [ 175.201673] ------------[ cut here ]------------ [ 175.206443] kernel BUG at fs/gfs2/glock.c:1082! [ 175.211180] invalid opcode: 0000 [#1] PREEMPT SMP KASAN [ 175.216633] Modules linked in: [ 175.219843] CPU: 0 PID: 7985 Comm: gfs2_quotad Not tainted 4.14.302-syzkaller #0 [ 175.227403] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 [ 175.236765] task: ffff88809562e240 task.stack: ffff8880b2cc8000 [ 175.242833] RIP: 0010:gfs2_glock_nq.cold+0x279/0x2d0 [ 175.247932] RSP: 0018:ffff8880b2ccfb68 EFLAGS: 00010296 [ 175.253298] RAX: ffffed1016599f4e RBX: ffff8880a94277e0 RCX: 1ffff11012ac5d68 [ 175.260616] RDX: 0000000000000000 RSI: 0000000000000004 RDI: ffffffff87c0e310 [ 175.267888] RBP: 0000000000001f31 R08: 0000000000000040 R09: 0000000000000003 [ 175.275164] R10: 0000000000000000 R11: 0000000000000000 R12: ffff8880b3fb9578 [ 175.282423] R13: ffff8880a94277e0 R14: 0000000000000001 R15: 0000000000000000 [ 175.289715] FS: 0000000000000000(0000) GS:ffff8880ba400000(0000) knlGS:0000000000000000 [ 175.298018] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 175.303893] CR2: 00005633757e3160 CR3: 00000000a39dd000 CR4: 00000000003406f0 [ 175.311256] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 175.318515] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 175.325791] Call Trace: [ 175.328377] do_sync+0x3f8/0xba0 [ 175.331737] ? gfs2_qd_search_bucket+0x1d0/0x1d0 [ 175.336481] ? qd_check_sync.part.0+0x1e4/0x270 [ 175.341493] ? do_qc+0x5f0/0x5f0 [ 175.344855] ? lock_acquire+0x170/0x3f0 [ 175.348820] ? lock_downgrade+0x740/0x740 [ 175.352963] gfs2_quota_sync+0x4f1/0x690 [ 175.357018] gfs2_quotad+0x23f/0x810 [ 175.360724] ? gfs2_wake_up_statfs+0x80/0x80 [ 175.365124] ? wait_woken+0x230/0x230 [ 175.369003] ? gfs2_wake_up_statfs+0x80/0x80 [ 175.373402] kthread+0x30d/0x420 [ 175.376759] ? kthread_create_on_node+0xd0/0xd0 [ 175.381418] ret_from_fork+0x24/0x30 [ 175.385309] Code: c1 ea 03 0f b6 04 02 84 c0 74 04 3c 03 7e 6c 8b 73 18 44 89 f2 48 c7 c7 e0 c0 c0 87 e8 bd 82 f9 ff 4c 89 ee 31 ff e8 79 d9 b0 fb <0f> 0b e8 22 65 75 fa 4c 8b 04 24 e9 ac fd ff ff 31 ed e9 14 fe [ 175.404463] RIP: gfs2_glock_nq.cold+0x279/0x2d0 RSP: ffff8880b2ccfb68 [ 175.411134] ---[ end trace a82dc9197b4e5c2b ]--- [ 175.415894] Kernel panic - not syncing: Fatal exception [ 175.421470] Kernel Offset: disabled [ 175.425089] Rebooting in 86400 seconds..