loop0: detected capacity change from 0 to 32768
=======================================================
WARNING: The mand mount option has been deprecated and
         and is ignored by this kernel. Remove the mand
         option from the mount to silence this warning.
=======================================================
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 1 extents in 0ms
gfs2: fsid=syz:syz.0: first mount done, others may mount
gfs2: fsid=syz:syz.0: Failed to zero data buffers
------------[ cut here ]------------
WARNING: CPU: 0 PID: 5329 at fs/iomap/buffered-io.c:1365 iomap_zero_iter+0x729/0x8f0 fs/iomap/buffered-io.c:1365
Modules linked in:
CPU: 0 UID: 0 PID: 5329 Comm: syz.0.0 Not tainted 6.15.0-rc2-syzkaller-00037-g834a4a689699 #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
RIP: 0010:iomap_zero_iter+0x729/0x8f0 fs/iomap/buffered-io.c:1365
Code: bc 24 a0 00 00 00 00 48 8b 5c 24 40 4c 8d b4 24 c0 00 00 00 0f 84 b5 00 00 00 e8 52 95 60 ff e9 12 fb ff ff e8 48 95 60 ff 90 <0f> 0b 90 e9 39 fc ff ff 48 8b 4c 24 38 80 e1 07 fe c1 38 c1 0f 8c
RSP: 0018:ffffc9000d517820 EFLAGS: 00010287
RAX: ffffffff8262bfe8 RBX: 0000000000000000 RCX: 0000000000100000
RDX: ffffc9000e182000 RSI: 00000000000003ed RDI: 00000000000003ee
RBP: ffffc9000d517950 R08: ffffffff8262bc1c R09: 1ffffffff20bfc2e
R10: dffffc0000000000 R11: fffffbfff20bfc2f R12: ffffc9000d517a40
R13: dffffc0000000000 R14: ffffea000135d700 R15: 0000000000008000
FS:  00007f6a8ea9b6c0(0000) GS:ffff88808c593000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f6a81aff000 CR3: 00000000404de000 CR4: 0000000000352ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 iomap_zero_range+0x7b2/0xa60 fs/iomap/buffered-io.c:1451
 gfs2_block_zero_range fs/gfs2/bmap.c:1303 [inline]
 __gfs2_punch_hole+0x319/0xb40 fs/gfs2/bmap.c:2421
 gfs2_fallocate+0x392/0x480 fs/gfs2/file.c:1400
 vfs_fallocate+0x627/0x7a0 fs/open.c:338
 ksys_fallocate fs/open.c:362 [inline]
 __do_sys_fallocate fs/open.c:367 [inline]
 __se_sys_fallocate fs/open.c:365 [inline]
 __x64_sys_fallocate+0xbc/0x110 fs/open.c:365
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f6a8db8d169
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f6a8ea9b038 EFLAGS: 00000246 ORIG_RAX: 000000000000011d
RAX: ffffffffffffffda RBX: 00007f6a8dda5fa0 RCX: 00007f6a8db8d169
RDX: 0000000000000008 RSI: 0000000000000003 RDI: 0000000000000007
RBP: 00007f6a8dc0e990 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000008002 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f6a8dda5fa0 R15: 00007fff88adf018
 </TASK>