gfs2: pid: 9654 gfs2: lock type: 8 req lock state : 1 gfs2: G: s:EX n:8/0 f:qb t:EX d:EX/0 a:0 v:0 r:5 m:20 gfs2: H: s:EX f:cH e:0 p:9654 [gfs2_quotad] gfs2_glock_nq_init fs/gfs2/glock.h:226 [inline] gfs2: H: s:EX f:cH e:0 p:9654 [gfs2_quotad] do_sync+0x3f0/0xba0 fs/gfs2/quota.c:893 ------------[ cut here ]------------ kernel BUG at fs/gfs2/glock.c:1082! invalid opcode: 0000 [#1] PREEMPT SMP KASAN Modules linked in: CPU: 0 PID: 9654 Comm: gfs2_quotad Not tainted 4.14.213-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 task: ffff88809c4e2580 task.stack: ffff88804d4a0000 RIP: 0010:add_to_queue fs/gfs2/glock.c:1082 [inline] RIP: 0010:gfs2_glock_nq.cold+0x279/0x2dd fs/gfs2/glock.c:1107 RSP: 0018:ffff88804d4a7b68 EFLAGS: 00010296 RAX: ffffed1009a94f4e RBX: ffff88809ccc37e0 RCX: 1ffff1101389c5d0 RDX: 0000000000000000 RSI: 0000000000000004 RDI: ffffffff87c0a310 RBP: 00000000000025b6 R08: 0000000000000040 R09: 0000000000000003 R10: 0000000000000000 R11: 0000000000000000 R12: ffff8880b103ce38 R13: ffff88809ccc37e0 R14: 0000000000000001 R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff8880ba400000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055f910923c08 CR3: 00000000ab328000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: gfs2_glock_nq_init fs/gfs2/glock.h:228 [inline] do_sync+0x3f8/0xba0 fs/gfs2/quota.c:893 gfs2_quota_sync+0x4f1/0x690 fs/gfs2/quota.c:1299 quotad_check_timeo fs/gfs2/quota.c:1489 [inline] quotad_check_timeo fs/gfs2/quota.c:1483 [inline] gfs2_quotad+0x23f/0x80b fs/gfs2/quota.c:1554 EXT4-fs (loop0): mounted filesystem without journal. Opts: resuid=0x0000000000000000,,errors=continue kthread+0x30d/0x420 kernel/kthread.c:232 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:404 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 80 c0 87 e8 3f e7 84 fe 4c 89 ee 31 ff e8 44 92 ff ff <0f> 0b e8 9d 2a c0 fe 4c 8b 04 24 e9 ac fd ff ff 31 ed e9 14 fe RIP: add_to_queue fs/gfs2/glock.c:1082 [inline] RSP: ffff88804d4a7b68 RIP: gfs2_glock_nq.cold+0x279/0x2dd fs/gfs2/glock.c:1107 RSP: ffff88804d4a7b68 ---[ end trace 3c1dd1107b4726fb ]---