[ 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 '10.128.0.132' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 176.244308] gfs2: fsid=syz:syz: Trying to join cluster "lock_nolock", "syz:syz" [ 176.252338] gfs2: fsid=syz:syz: Now mounting FS... [ 176.265732] gfs2: fsid=syz:syz.0: journal 0 mapped with 3 extents [ 176.272296] gfs2: fsid=syz:syz.0: jid=0, already locked for use [ 176.279144] gfs2: fsid=syz:syz.0: jid=0: Looking at journal... [ 176.289469] gfs2: fsid=syz:syz.0: jid=0: Done [ 176.294087] gfs2: fsid=syz:syz.0: first mount done, others may mount executing program [ 176.528774] 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 [ 236.491020] gfs2: original: do_sync+0x442/0xc90 [ 236.495804] gfs2: pid: 8100 [ 236.498826] gfs2: lock type: 8 req lock state : 1 [ 236.503832] gfs2: new: do_sync+0x442/0xc90 [ 236.508072] gfs2: pid: 8100 [ 236.511036] gfs2: lock type: 8 req lock state : 1 [ 236.515945] gfs2: G: s:EX n:8/1 f:qb t:EX d:EX/0 a:0 v:0 r:5 m:20 [ 236.522318] gfs2: H: s:EX f:cH e:0 p:8100 [gfs2_quotad] do_sync+0x442/0xc90 [ 236.529862] ------------[ cut here ]------------ [ 236.534622] kernel BUG at fs/gfs2/glock.c:1082! [ 236.539357] invalid opcode: 0000 [#1] PREEMPT SMP KASAN [ 236.544724] CPU: 1 PID: 8100 Comm: gfs2_quotad Not tainted 4.19.211-syzkaller #0 [ 236.552373] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 [ 236.561831] RIP: 0010:gfs2_glock_nq.cold+0x276/0x2cd [ 236.566942] Code: 0f b6 04 02 84 c0 74 04 3c 03 7e 6e 8b 73 18 44 89 ea 48 c7 c7 60 4f a6 88 e8 02 57 f8 ff 48 8b 74 24 08 31 ff e8 0b cc 0a fb <0f> 0b e8 74 02 9d f9 4c 8b 04 24 e9 aa fd ff ff 31 ed e9 12 fe ff [ 236.585852] RSP: 0000:ffff8880b142fb30 EFLAGS: 00010282 [ 236.591217] RAX: 0000000000000000 RBX: ffff88809f3e0cf8 RCX: ffffffff83063ba3 [ 236.598488] RDX: 0000000000000000 RSI: ffffffff83063bf2 RDI: ffffffff88a67230 [ 236.605756] RBP: 0000000000001fa4 R08: 0000000000000000 R09: 0000000000000000 [ 236.613010] R10: 0000000000000001 R11: 0000000000000000 R12: ffff8880a3dde278 [ 236.620263] R13: 0000000000000001 R14: 0000000000000000 R15: ffff8880a8445c00 [ 236.627520] FS: 0000000000000000(0000) GS:ffff8880ba100000(0000) knlGS:0000000000000000 [ 236.635728] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 236.641591] CR2: 00007f25da088000 CR3: 0000000099067000 CR4: 00000000003406e0 [ 236.648850] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 236.656105] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 236.663360] Call Trace: [ 236.665945] do_sync+0x44a/0xc90 [ 236.669300] ? qd_check_sync.part.0+0x206/0x2a0 [ 236.673956] ? do_qc+0x660/0x660 [ 236.677310] ? gfs2_quota_sync+0x3fa/0x780 [ 236.681534] ? lock_downgrade+0x720/0x720 [ 236.685668] ? lock_acquire+0x170/0x3c0 [ 236.689636] ? gfs2_quota_sync+0x327/0x780 [ 236.693949] ? _raw_spin_unlock+0x29/0x40 [ 236.698085] gfs2_quota_sync+0x5d1/0x780 [ 236.702137] gfs2_quotad+0x2a9/0x930 [ 236.705846] ? lock_acquire+0x170/0x3c0 [ 236.709810] ? gfs2_wake_up_statfs+0x80/0x80 [ 236.714203] ? wait_woken+0x250/0x250 [ 236.717992] ? lockdep_hardirqs_on+0x3a8/0x5c0 [ 236.722564] ? _raw_spin_unlock_irqrestore+0x66/0xe0 [ 236.727653] ? __kthread_parkme+0x133/0x1e0 [ 236.731962] ? gfs2_wake_up_statfs+0x80/0x80 [ 236.736453] kthread+0x33f/0x460 [ 236.739806] ? kthread_park+0x180/0x180 [ 236.743775] ret_from_fork+0x24/0x30 [ 236.747472] Modules linked in: [ 236.750698] ---[ end trace 9a1e6f5018ca76d2 ]--- [ 236.755461] RIP: 0010:gfs2_glock_nq.cold+0x276/0x2cd [ 236.760593] Code: 0f b6 04 02 84 c0 74 04 3c 03 7e 6e 8b 73 18 44 89 ea 48 c7 c7 60 4f a6 88 e8 02 57 f8 ff 48 8b 74 24 08 31 ff e8 0b cc 0a fb <0f> 0b e8 74 02 9d f9 4c 8b 04 24 e9 aa fd ff ff 31 ed e9 12 fe ff [ 236.779542] RSP: 0000:ffff8880b142fb30 EFLAGS: 00010282 [ 236.784952] RAX: 0000000000000000 RBX: ffff88809f3e0cf8 RCX: ffffffff83063ba3 executing program [ 236.792265] RDX: 0000000000000000 RSI: ffffffff83063bf2 RDI: ffffffff88a67230 [ 236.799538] RBP: 0000000000001fa4 R08: 0000000000000000 R09: 0000000000000000 [ 236.806861] R10: 0000000000000001 R11: 0000000000000000 R12: ffff8880a3dde278 [ 236.814187] R13: 0000000000000001 R14: 0000000000000000 R15: ffff8880a8445c00 [ 236.821493] FS: 0000000000000000(0000) GS:ffff8880ba100000(0000) knlGS:0000000000000000 [ 236.829755] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 236.835643] CR2: 00007f25da088000 CR3: 0000000009e6d000 CR4: 00000000003406e0 [ 236.842984] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 236.850392] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 236.857767] Kernel panic - not syncing: Fatal exception [ 236.863186] Kernel Offset: disabled [ 236.866805] Rebooting in 86400 seconds..