------------[ cut here ]------------
truncate spotted in mem i_size < btree i_size: 1 < 65536
WARNING: CPU: 1 PID: 12824 at fs/bcachefs/fs-io.c:434 bchfs_truncate+0x7ad/0xd70 fs/bcachefs/fs-io.c:434
Modules linked in:
CPU: 1 PID: 12824 Comm: syz-executor.4 Not tainted 6.9.0-syzkaller-02713-g1b10b390d945 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024
RIP: 0010:bchfs_truncate+0x7ad/0xd70 fs/bcachefs/fs-io.c:434
Code: 24 38 84 c0 0f 85 d3 fc ff ff e8 9e 9e 8e fd c6 05 e1 84 cc 0b 01 90 48 c7 c7 c0 71 7f 8b 4c 89 ea 4c 89 fe e8 44 ef 50 fd 90 <0f> 0b 90 90 48 b8 00 00 00 00 00 fc ff df 48 8b 54 24 48 48 c1 ea
RSP: 0018:ffffc9000395f768 EFLAGS: 00010286
RAX: 0000000000000000 RBX: ffff88805b2cf460 RCX: ffffc9000cbea000
RDX: 0000000000040000 RSI: ffffffff81505406 RDI: 0000000000000001
RBP: ffffc9000395f930 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000001 R12: ffff88805b2cef18
R13: 0000000000010000 R14: ffffc9000395fa28 R15: 0000000000000001
FS:  00007f8c90bb46c0(0000) GS:ffff8880b9300000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2e648000 CR3: 000000002c3fa000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 bch2_setattr+0x1ab/0x250 fs/bcachefs/fs.c:885
 notify_change+0x742/0x11c0 fs/attr.c:497
 do_truncate+0x15c/0x220 fs/open.c:65
 handle_truncate fs/namei.c:3308 [inline]
 do_open fs/namei.c:3654 [inline]
 path_openat+0x24b9/0x2990 fs/namei.c:3807
 do_filp_open+0x1dc/0x430 fs/namei.c:3834
 do_sys_openat2+0x17a/0x1e0 fs/open.c:1406
 do_sys_open fs/open.c:1421 [inline]
 __do_sys_creat fs/open.c:1497 [inline]
 __se_sys_creat fs/open.c:1491 [inline]
 __x64_sys_creat+0xcd/0x120 fs/open.c:1491
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xcf/0x260 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f8c8fe7dd69
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 90 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 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f8c90bb40c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000055
RAX: ffffffffffffffda RBX: 00007f8c8ffac050 RCX: 00007f8c8fe7dd69
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000200000c0
RBP: 00007f8c8feca49e R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000006e R14: 00007f8c8ffac050 R15: 00007ffd7e4de728
 </TASK>