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: 5320 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 61 5b 11 fe e9 45 fb ff ff e8 e7 8a a5 fd 90 <0f> 0b e8 df 8a a5 fd 90 0f 0b e8 d7 8a a5 fd 90 0f 0b 0f 1f 40 00
RSP: 0018:ffffc9000f73f1b0 EFLAGS: 00010293
RAX: ffffffff84201e29 RBX: ffff888042304100 RCX: ffff888034660000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000002
RBP: 1ffff1100846083d R08: ffff8880386ad3a7 R09: 1ffff110070d5a74
R10: dffffc0000000000 R11: ffffed10070d5a75 R12: dffffc0000000000
R13: ffff8880445d7850 R14: ffff8880386ad3a0 R15: ffff888012454000
FS:  00007f1949a2d6c0(0000) GS:ffff88808ca58000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fa98722c6b0 CR3: 0000000012610000 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 mm/filemap.c:412 [inline]
 filemap_write_and_wait_range+0x335/0x3f0 mm/filemap.c:684
 filemap_write_and_wait include/linux/pagemap.h:65 [inline]
 iomap_bmap+0x1f0/0x430 fs/iomap/fiemap.c:106
 gfs2_bmap+0x181/0x210 fs/gfs2/aops.c:573
 bmap+0xac/0xe0 fs/inode.c:2052
 ioctl_fibmap fs/ioctl.c:76 [inline]
 file_ioctl+0x4ac/0x860 fs/ioctl.c:326
 do_vfs_ioctl+0xc26/0x1530 fs/ioctl.c:576
 __do_sys_ioctl fs/ioctl.c:595 [inline]
 __se_sys_ioctl+0x82/0x170 fs/ioctl.c:583
 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: 0033:0x7f1948b9c799
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:00007f1949a2cfe8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f1948e16090 RCX: 00007f1948b9c799
RDX: 0000200000000280 RSI: 0000000000000001 RDI: 0000000000000006
RBP: 00007f1948c32bd9 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f1948e16128 R14: 00007f1948e16090 R15: 00007ffc927e0db8
 </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 61 5b 11 fe e9 45 fb ff ff e8 e7 8a a5 fd 90 <0f> 0b e8 df 8a a5 fd 90 0f 0b e8 d7 8a a5 fd 90 0f 0b 0f 1f 40 00
RSP: 0018:ffffc9000f73f1b0 EFLAGS: 00010293
RAX: ffffffff84201e29 RBX: ffff888042304100 RCX: ffff888034660000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000002
RBP: 1ffff1100846083d R08: ffff8880386ad3a7 R09: 1ffff110070d5a74
R10: dffffc0000000000 R11: ffffed10070d5a75 R12: dffffc0000000000
R13: ffff8880445d7850 R14: ffff8880386ad3a0 R15: ffff888012454000
FS:  00007f1949a2d6c0(0000) GS:ffff88808ca58000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f1949a0bfe8 CR3: 0000000012610000 CR4: 0000000000352ef0