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gfs2: fsid=syz:syz.0: fatal assertion failed
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kernel BUG at fs/gfs2/quota.c:320!
Oops: invalid opcode: 0000 [#1] SMP KASAN NOPTI
CPU: 1 UID: 60928 PID: 7508 Comm: syz.1.412 Not tainted 6.16.0-rc5-syzkaller-00266-g3f31a806a62e #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
RIP: 0010:__qd_hold fs/gfs2/quota.c:320 [inline]
RIP: 0010:do_qc+0x5c1/0x5e0 fs/gfs2/quota.c:705
Code: 00 00 00 00 00 fc ff df 48 8b 0c 24 80 3c 01 00 74 0a 48 8b 7c 24 10 e8 2d 74 2d fe 48 8b 44 24 10 48 8b 38 e8 40 03 34 fd 90 <0f> 0b e8 e8 f3 c9 fd 48 8b 7c 24 10 e8 2e 03 34 fd 90 0f 0b 66 66
RSP: 0018:ffffc9000f697108 EFLAGS: 00010246
RAX: 000000000000002c RBX: 1ffff11009c3a438 RCX: 74992e58394b7800
RDX: ffffc90004942000 RSI: 00000000000038f7 RDI: 00000000000038f8
RBP: 0000000000000001 R08: ffffffff8fa1f5f7 R09: 1ffffffff1f43ebe
R10: dffffc0000000000 R11: fffffbfff1f43ebf R12: ffff88804e1d2150
R13: ffff88804e1d21c0 R14: ffff88804e1d21e0 R15: 0000000000000000
FS:  00007f685e8c96c0(0000) GS:ffff888125d1b000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fb7adad3988 CR3: 000000002858b000 CR4: 0000000000350ef0
Call Trace:
 <TASK>
 gfs2_quota_change+0x394/0x800 fs/gfs2/quota.c:1304
 gfs2_alloc_blocks+0x18bc/0x2080 fs/gfs2/rgrp.c:2494
 __gfs2_iomap_alloc+0x4b7/0x1a30 fs/gfs2/bmap.c:708
 gfs2_iomap_begin_write fs/gfs2/bmap.c:1065 [inline]
 gfs2_iomap_begin+0xac8/0x12a0 fs/gfs2/bmap.c:1130
 iomap_iter+0x53a/0xdf0 fs/iomap/iter.c:109
 iomap_file_buffered_write+0x20e/0x980 fs/iomap/buffered-io.c:1057
 gfs2_file_buffered_write+0x4e5/0x870 fs/gfs2/file.c:1061
 gfs2_file_write_iter+0x94e/0x1100 fs/gfs2/file.c:1165
 new_sync_write fs/read_write.c:593 [inline]
 vfs_write+0x54b/0xa90 fs/read_write.c:686
 ksys_write+0x145/0x250 fs/read_write.c:738
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f685d98e929
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:00007f685e8c9038 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f685dbb5fa0 RCX: 00007f685d98e929
RDX: 00000000000003e0 RSI: 0000200000001600 RDI: 0000000000000004
RBP: 00007f685da10b39 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f685dbb5fa0 R15: 00007fffae5bd818
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:__qd_hold fs/gfs2/quota.c:320 [inline]
RIP: 0010:do_qc+0x5c1/0x5e0 fs/gfs2/quota.c:705
Code: 00 00 00 00 00 fc ff df 48 8b 0c 24 80 3c 01 00 74 0a 48 8b 7c 24 10 e8 2d 74 2d fe 48 8b 44 24 10 48 8b 38 e8 40 03 34 fd 90 <0f> 0b e8 e8 f3 c9 fd 48 8b 7c 24 10 e8 2e 03 34 fd 90 0f 0b 66 66
RSP: 0018:ffffc9000f697108 EFLAGS: 00010246
RAX: 000000000000002c RBX: 1ffff11009c3a438 RCX: 74992e58394b7800
RDX: ffffc90004942000 RSI: 00000000000038f7 RDI: 00000000000038f8
RBP: 0000000000000001 R08: ffffffff8fa1f5f7 R09: 1ffffffff1f43ebe
R10: dffffc0000000000 R11: fffffbfff1f43ebf R12: ffff88804e1d2150
R13: ffff88804e1d21c0 R14: ffff88804e1d21e0 R15: 0000000000000000
FS:  00007f685e8c96c0(0000) GS:ffff888125d1b000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fb7adad3988 CR3: 000000002858b000 CR4: 0000000000350ef0