[ 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 '10.128.1.23' (ECDSA) to the list of known hosts. syzkaller login: [ 26.729852] IPVS: ftp: loaded support on port[0] = 21 executing program [ 26.840145] gfs2: fsid=syz:syz: Trying to join cluster "lock_nolock", "syz:syz" [ 26.847824] gfs2: fsid=syz:syz: Now mounting FS... [ 26.859921] gfs2: fsid=syz:syz.0: journal 0 mapped with 1 extents [ 26.866382] gfs2: fsid=syz:syz.0: jid=0, already locked for use [ 26.872479] gfs2: fsid=syz:syz.0: jid=0: Looking at journal... [ 26.882170] gfs2: fsid=syz:syz.0: jid=0: Done [ 26.887566] gfs2: fsid=syz:syz.0: first mount done, others may mount [ 26.995738] gfs2: fsid=syz:syz.0: found 2 quota changes [ 27.013250] gfs2: original: do_sync+0x3f0/0xba0 [ 27.018090] gfs2: pid: 7957 [ 27.021014] gfs2: lock type: 8 req lock state : 1 [ 27.025968] gfs2: new: do_sync+0x3f0/0xba0 [ 27.030193] gfs2: pid: 7957 [ 27.033112] gfs2: lock type: 8 req lock state : 1 [ 27.038125] gfs2: G: s:EX n:8/1 f:qb t:EX d:EX/0 a:0 v:0 r:5 m:20 [ 27.044494] gfs2: H: s:EX f:cH e:0 p:7957 [syz-executor129] do_sync+0x3f0/0xba0 [ 27.052206] ------------[ cut here ]------------ [ 27.056939] kernel BUG at fs/gfs2/glock.c:1082! [ 27.061633] invalid opcode: 0000 [#1] PREEMPT SMP KASAN [ 27.066973] Modules linked in: [ 27.070140] CPU: 1 PID: 7957 Comm: syz-executor129 Not tainted 4.14.300-syzkaller #0 [ 27.077988] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 [ 27.087311] task: ffff8880b377a400 task.stack: ffff888094ef0000 [ 27.093344] RIP: 0010:gfs2_glock_nq.cold+0x279/0x2d0 [ 27.098417] RSP: 0018:ffff888094ef7978 EFLAGS: 00010292 [ 27.103749] RAX: ffffed10129def10 RBX: ffff8880b444d2a0 RCX: 1ffff110166ef5a5 [ 27.110989] RDX: 0000000000000000 RSI: 0000000000000005 RDI: ffffffff87c0e290 [ 27.118237] RBP: 0000000000001f15 R08: 0000000000000044 R09: 0000000000000004 [ 27.125477] R10: 0000000000000000 R11: 0000000000000000 R12: ffff8880a8f28e78 [ 27.132716] R13: ffff8880b444d2a0 R14: 0000000000000001 R15: 0000000000000000 [ 27.139960] FS: 000055555571e300(0000) GS:ffff8880ba500000(0000) knlGS:0000000000000000 [ 27.148153] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 27.154004] CR2: 00007f347a892140 CR3: 00000000b28c6000 CR4: 00000000003406e0 [ 27.161249] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 27.168490] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 27.175732] Call Trace: [ 27.178299] do_sync+0x3f8/0xba0 [ 27.181644] ? gfs2_qd_search_bucket+0x1d0/0x1d0 [ 27.186366] ? qd_check_sync.part.0+0x1e4/0x270 [ 27.191003] ? do_qc+0x5f0/0x5f0 [ 27.194345] ? lock_acquire+0x170/0x3f0 [ 27.198290] ? lock_downgrade+0x740/0x740 [ 27.202411] gfs2_quota_sync+0x4f1/0x690 [ 27.206443] gfs2_sync_fs+0x40/0xa0 [ 27.210039] ? gfs2_show_options+0xb50/0xb50 [ 27.214417] sync_filesystem+0xe2/0x230 [ 27.220357] generic_shutdown_super+0x70/0x370 [ 27.224911] kill_block_super+0x95/0xe0 [ 27.228854] gfs2_kill_sb+0x12c/0x1a0 [ 27.232624] deactivate_locked_super+0x6c/0xd0 [ 27.237176] deactivate_super+0x7f/0xa0 [ 27.241121] cleanup_mnt+0x186/0x2c0 [ 27.244804] task_work_run+0x11f/0x190 [ 27.248663] do_exit+0xa44/0x2850 [ 27.252089] ? __do_page_fault+0x571/0xad0 [ 27.256293] ? mm_update_next_owner+0x5b0/0x5b0 [ 27.260933] ? lock_downgrade+0x740/0x740 [ 27.265052] do_group_exit+0x100/0x2e0 [ 27.268911] SyS_exit_group+0x19/0x20 [ 27.272767] ? do_group_exit+0x2e0/0x2e0 [ 27.276798] do_syscall_64+0x1d5/0x640 [ 27.280666] entry_SYSCALL_64_after_hwframe+0x5e/0xd3 [ 27.285826] 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 60 c0 c0 87 e8 dc 82 f9 ff 4c 89 ee 31 ff e8 43 e5 b0 fb <0f> 0b e8 6c 74 75 fa 4c 8b 04 24 e9 ac fd ff ff 31 ed e9 14 fe [ 27.304880] RIP: gfs2_glock_nq.cold+0x279/0x2d0 RSP: ffff888094ef7978 [ 27.311471] ---[ end trace b5997e84d8bb2f9a ]--- [ 27.316228] Kernel panic - not syncing: Fatal exception [ 27.321628] Kernel Offset: disabled [ 27.325230] Rebooting in 86400 seconds..