[ 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 '10.128.1.49' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 27.539145] IPVS: ftp: loaded support on port[0] = 21 [ 27.635542] gfs2: fsid=syz:syz: Trying to join cluster "lock_nolock", "syz:syz" [ 27.643093] gfs2: fsid=syz:syz: Now mounting FS... [ 27.662904] gfs2: fsid=syz:syz.0: journal 0 mapped with 1 extents [ 27.669434] gfs2: fsid=syz:syz.0: jid=0, already locked for use [ 27.676180] gfs2: fsid=syz:syz.0: jid=0: Looking at journal... [ 27.686035] gfs2: fsid=syz:syz.0: jid=0: Done [ 27.690787] gfs2: fsid=syz:syz.0: first mount done, others may mount [ 27.786246] gfs2: fsid=syz:syz.0: found 2 quota changes [ 27.806046] gfs2: original: do_sync+0x3f0/0xba0 [ 27.810816] gfs2: pid: 7984 [ 27.813740] gfs2: lock type: 8 req lock state : 1 [ 27.818775] gfs2: new: do_sync+0x3f0/0xba0 [ 27.823000] gfs2: pid: 7984 [ 27.825972] gfs2: lock type: 8 req lock state : 1 [ 27.830812] gfs2: G: s:EX n:8/1 f:qb t:EX d:EX/0 a:0 v:0 r:5 m:20 [ 27.837246] gfs2: H: s:EX f:cH e:0 p:7984 [syz-executor216] do_sync+0x3f0/0xba0 [ 27.845020] ------------[ cut here ]------------ [ 27.849763] kernel BUG at fs/gfs2/glock.c:1082! [ 27.854413] invalid opcode: 0000 [#1] PREEMPT SMP KASAN [ 27.859751] Modules linked in: [ 27.862916] CPU: 1 PID: 7984 Comm: syz-executor216 Not tainted 4.14.302-syzkaller #0 [ 27.870768] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 [ 27.880098] task: ffff888097356340 task.stack: ffff8880b4cb0000 [ 27.886220] RIP: 0010:gfs2_glock_nq.cold+0x279/0x2d0 [ 27.891291] RSP: 0018:ffff8880b4cb7978 EFLAGS: 00010292 [ 27.896625] RAX: ffffed1016996f10 RBX: ffff8880b3e6e7e0 RCX: 1ffff11012e6ad8d [ 27.903954] RDX: 0000000000000000 RSI: 0000000000000005 RDI: ffffffff87c0e310 [ 27.911196] RBP: 0000000000001f30 R08: 0000000000000044 R09: 0000000000000004 [ 27.918435] R10: 0000000000000000 R11: 0000000000000000 R12: ffff8880a34efb78 [ 27.925697] R13: ffff8880b3e6e7e0 R14: 0000000000000001 R15: 0000000000000000 [ 27.932937] FS: 0000555556057300(0000) GS:ffff8880ba500000(0000) knlGS:0000000000000000 [ 27.941131] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 27.947033] CR2: 00007f0c4e980140 CR3: 00000000a1231000 CR4: 00000000003406e0 [ 27.954342] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 27.961584] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 27.968821] Call Trace: [ 27.971385] do_sync+0x3f8/0xba0 [ 27.974734] ? gfs2_qd_search_bucket+0x1d0/0x1d0 [ 27.979466] ? qd_check_sync.part.0+0x1e4/0x270 [ 27.984104] ? do_qc+0x5f0/0x5f0 [ 27.987443] ? lock_acquire+0x170/0x3f0 [ 27.991387] ? lock_downgrade+0x740/0x740 [ 27.995504] gfs2_quota_sync+0x4f1/0x690 [ 27.999537] gfs2_sync_fs+0x40/0xa0 [ 28.003135] ? gfs2_show_options+0xb50/0xb50 [ 28.007516] sync_filesystem+0xe2/0x230 [ 28.011460] generic_shutdown_super+0x70/0x370 [ 28.016014] kill_block_super+0x95/0xe0 [ 28.019960] gfs2_kill_sb+0x12c/0x1a0 [ 28.023734] deactivate_locked_super+0x6c/0xd0 [ 28.028287] deactivate_super+0x7f/0xa0 [ 28.032230] cleanup_mnt+0x186/0x2c0 [ 28.035914] task_work_run+0x11f/0x190 [ 28.039782] do_exit+0xa44/0x2850 [ 28.043208] ? __do_page_fault+0x571/0xad0 [ 28.047416] ? mm_update_next_owner+0x5b0/0x5b0 [ 28.052056] ? lock_downgrade+0x740/0x740 [ 28.056184] do_group_exit+0x100/0x2e0 [ 28.060042] SyS_exit_group+0x19/0x20 [ 28.063811] ? do_group_exit+0x2e0/0x2e0 [ 28.067843] do_syscall_64+0x1d5/0x640 [ 28.071703] entry_SYSCALL_64_after_hwframe+0x5e/0xd3 [ 28.076868] RIP: 0033:0x7f0c4e8d5999 [ 28.080558] RSP: 002b:00007ffc8a462158 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 28.088233] RAX: ffffffffffffffda RBX: 00007f0c4e982330 RCX: 00007f0c4e8d5999 [ 28.095475] RDX: 000000000000003c RSI: 00000000000000e7 RDI: 0000000000000001 [ 28.102715] RBP: 0000000000000001 R08: ffffffffffffffc0 R09: 0000000000037f49 [ 28.109953] R10: 0000000000000000 R11: 0000000000000246 R12: 00007f0c4e982330 [ 28.117195] R13: 0000000000000001 R14: 0000000000000000 R15: 0000000000000001 [ 28.124434] 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 [ 28.143501] RIP: gfs2_glock_nq.cold+0x279/0x2d0 RSP: ffff8880b4cb7978 [ 28.150110] ---[ end trace 20b4bd34c6cb56d1 ]--- [ 28.155061] Kernel panic - not syncing: Fatal exception [ 28.160595] Kernel Offset: disabled [ 28.164199] Rebooting in 86400 seconds..