syzbot

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 1 extents in 0ms
gfs2: fsid=syz:syz.0: first mount done, others may mount
------------[ cut here ]------------
WARNING: CPU: 0 PID: 5314 at fs/iomap/buffered-io.c:1373 iomap_zero_iter+0x5c9/0x780 fs/iomap/buffered-io.c:1373
Modules linked in:
CPU: 0 UID: 0 PID: 5314 Comm: syz.0.0 Not tainted 6.13.0-syzkaller #0
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+0x5c9/0x780 fs/iomap/buffered-io.c:1373
Code: 00 00 00 00 fc ff df 0f 8e b1 00 00 00 48 01 5c 24 08 e8 4a 4e 66 ff 48 8d 9c 24 80 00 00 00 e9 f5 fb ff ff e8 38 4e 66 ff 90 <0f> 0b 90 e9 fe fc ff ff 48 8b 4c 24 18 80 e1 07 fe c1 38 c1 0f 8c
RSP: 0018:ffffc9000d30f3c0 EFLAGS: 00010287
RAX: ffffffff82392988 RBX: 0000000000000000 RCX: 0000000000100000
RDX: ffffc9000e4b2000 RSI: 000000000000052c RDI: 000000000000052d
RBP: ffffc9000d30f4b0 R08: ffffffff82392681 R09: 1ffffd400029e898
R10: dffffc0000000000 R11: fffff9400029e899 R12: ffffc9000d30f580
R13: dffffc0000000000 R14: ffffea00014f44c0 R15: 0000000000008000
FS:  00007f6b0465b6c0(0000) GS:ffff88801fc00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000002000f000 CR3: 00000000405fc000 CR4: 0000000000352ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 iomap_zero_range+0x69b/0x970 fs/iomap/buffered-io.c:1456
 gfs2_block_zero_range fs/gfs2/bmap.c:1303 [inline]
 __gfs2_punch_hole+0x228/0xb30 fs/gfs2/bmap.c:2413
 gfs2_fallocate+0x3a1/0x490 fs/gfs2/file.c:1399
 vfs_fallocate+0x569/0x6e0 fs/open.c:327
 do_vfs_ioctl+0x258c/0x2e40 fs/ioctl.c:885
 __do_sys_ioctl fs/ioctl.c:904 [inline]
 __se_sys_ioctl+0x80/0x170 fs/ioctl.c:892
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f6b03785d29
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:00007f6b0465b038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f6b03975fa0 RCX: 00007f6b03785d29
RDX: 00000000200001c0 RSI: 0000000040305829 RDI: 0000000000000004
RBP: 00007f6b03801b08 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f6b03975fa0 R15: 00007ffdcc633858
 </TASK>