loop0: detected capacity change from 0 to 32768
gfs2: fsid=syz:syz: Trying to join cluster "lock_nolock", "syz:syz"
gfs2: fsid=syz:syz: Now mounting FS (format 1801)...
gfs2: fsid=syz:syz.0: journal 0 mapped with 9 extents in 0ms
gfs2: fsid=syz:syz.0: first mount done, others may mount
gfs2: fsid=syz:syz.0: found 1 quota changes
syz.0.0: attempt to access beyond end of device
loop0: rw=8390665, sector=68719479088, nr_sectors = 2056 limit=32768
gfs2: fsid=syz:syz.0: Failed to zero data buffers
syz.0.0: attempt to access beyond end of device
loop0: rw=8388608, sector=68719479088, nr_sectors = 8 limit=32768
syz.0.0: attempt to access beyond end of device
loop0: rw=8390657, sector=68719479088, nr_sectors = 8 limit=32768
Buffer I/O error on dev loop0, logical block 8589934886, lost async page write
------------[ cut here ]------------
kernel BUG at fs/gfs2/lops.c:107!
Oops: invalid opcode: 0000 [#1] SMP KASAN NOPTI
CPU: 0 UID: 0 PID: 5345 Comm: syz.0.0 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
RIP: 0010:gfs2_unpin+0x9aa/0x9c0 fs/gfs2/lops.c:107
Code: fe e9 24 fb ff ff 44 89 e1 80 e1 07 80 c1 03 38 c1 0f 8c 52 fb ff ff 4c 89 e7 e8 b1 d5 10 fe e9 45 fb ff ff e8 37 fe a4 fd 90 <0f> 0b e8 2f fe a4 fd 90 0f 0b e8 27 fe a4 fd 90 0f 0b 0f 1f 40 00
RSP: 0018:ffffc9000f5af4d0 EFLAGS: 00010287
RAX: ffffffff8420b399 RBX: ffff8880125b8b00 RCX: 0000000000100000
RDX: ffffc9000ec42000 RSI: 0000000000001739 RDI: 000000000000173a
RBP: 1ffff110024b7175 R08: ffff888011a1d917 R09: 1ffff11002343b22
R10: dffffc0000000000 R11: ffffed1002343b23 R12: dffffc0000000000
R13: ffff888011c5d850 R14: ffff888011a1d910 R15: ffff888012730000
FS:  00007f150acd06c0(0000) GS:ffff88808ca51000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 000000001253e000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 databuf_lo_after_commit+0x15e/0x1b0 fs/gfs2/lops.c:1080
 lops_after_commit fs/gfs2/lops.h:51 [inline]
 gfs2_log_flush+0xfac/0x2510 fs/gfs2/log.c:1111
 gfs2_jdata_writepages+0xf9/0x150 fs/gfs2/aops.c:370
 do_writepages+0x32e/0x550 mm/page-writeback.c:2554
 filemap_writeback mm/filemap.c:387 [inline]
 filemap_fdatawrite_range+0x1ef/0x2f0 mm/filemap.c:412
 gfs2_fsync+0xd8/0x370 fs/gfs2/file.c:752
 generic_write_sync include/linux/fs.h:2640 [inline]
 gfs2_file_write_iter+0xee4/0x1130 fs/gfs2/file.c:1168
 new_sync_write fs/read_write.c:595 [inline]
 vfs_write+0x61d/0xb90 fs/read_write.c:688
 ksys_write+0x150/0x270 fs/read_write.c:740
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x14d/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f1509d9c799
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f150accffe8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f150a015fa0 RCX: 00007f1509d9c799
RDX: 0000000000000060 RSI: 0000200000000240 RDI: 0000000000000004
RBP: 00007f1509e32c99 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f150a016038 R14: 00007f150a015fa0 R15: 00007ffc94349c98
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:gfs2_unpin+0x9aa/0x9c0 fs/gfs2/lops.c:107
Code: fe e9 24 fb ff ff 44 89 e1 80 e1 07 80 c1 03 38 c1 0f 8c 52 fb ff ff 4c 89 e7 e8 b1 d5 10 fe e9 45 fb ff ff e8 37 fe a4 fd 90 <0f> 0b e8 2f fe a4 fd 90 0f 0b e8 27 fe a4 fd 90 0f 0b 0f 1f 40 00
RSP: 0018:ffffc9000f5af4d0 EFLAGS: 00010287
RAX: ffffffff8420b399 RBX: ffff8880125b8b00 RCX: 0000000000100000
RDX: ffffc9000ec42000 RSI: 0000000000001739 RDI: 000000000000173a
RBP: 1ffff110024b7175 R08: ffff888011a1d917 R09: 1ffff11002343b22
R10: dffffc0000000000 R11: ffffed1002343b23 R12: dffffc0000000000
R13: ffff888011c5d850 R14: ffff888011a1d910 R15: ffff888012730000
FS:  00007f150acd06c0(0000) GS:ffff88808ca51000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f1509fec7c8 CR3: 000000001253e000 CR4: 0000000000352ef0