loop0: detected capacity change from 0 to 32768
BUG at fs/jfs/inode.c:370 assert(length >= 0)
------------[ cut here ]------------
kernel BUG at fs/jfs/inode.c:370!
Oops: invalid opcode: 0000 [#1] SMP KASAN PTI
CPU: 1 UID: 0 PID: 6579 Comm: syz.0.16 Not tainted 6.16.0-rc2-syzkaller-ge04c78d86a96 #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
RIP: 0010:jfs_truncate_nolock+0x33b/0x340 fs/jfs/inode.c:370
Code: e8 4a 9c 27 08 e8 25 c0 88 fe 48 c7 c7 00 7a c3 8b 48 c7 c6 20 76 c3 8b ba 72 01 00 00 48 c7 c1 40 7a c3 8b e8 16 ef ef fd 90 <0f> 0b 0f 1f 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 66
RSP: 0018:ffffc900039bf860 EFLAGS: 00010246
RAX: 000000000000002d RBX: ffff88805b9a3b80 RCX: 8c5e2f152c391600
RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000
RBP: ffffc900039bf910 R08: ffffc900039bf587 R09: 1ffff92000737eb0
R10: dffffc0000000000 R11: fffff52000737eb1 R12: fffffa000000000a
R13: dffffc0000000000 R14: ffff88805b9a3b80 R15: 1ffff92000737f10
FS:  00007fc6bb0096c0(0000) GS:ffff888125d85000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f5c47172368 CR3: 000000003134e000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 jfs_truncate fs/jfs/inode.c:412 [inline]
 jfs_write_failed+0x119/0x190 fs/jfs/inode.c:289
 jfs_direct_IO+0x1f4/0x220 fs/jfs/inode.c:342
 generic_file_direct_write+0x1db/0x3e0 mm/filemap.c:4046
 __generic_file_write_iter+0x11d/0x230 mm/filemap.c:4215
 generic_file_write_iter+0x10f/0x540 mm/filemap.c:4255
 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: 0033:0x7fc6ba18e969
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:00007fc6bb009038 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007fc6ba3b5fa0 RCX: 00007fc6ba18e969
RDX: 00000000000000a0 RSI: 0000200000000340 RDI: 0000000000000004
RBP: 00007fc6ba210ab1 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007fc6ba3b5fa0 R15: 00007ffdd96478f8
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:jfs_truncate_nolock+0x33b/0x340 fs/jfs/inode.c:370
Code: e8 4a 9c 27 08 e8 25 c0 88 fe 48 c7 c7 00 7a c3 8b 48 c7 c6 20 76 c3 8b ba 72 01 00 00 48 c7 c1 40 7a c3 8b e8 16 ef ef fd 90 <0f> 0b 0f 1f 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 66
RSP: 0018:ffffc900039bf860 EFLAGS: 00010246
RAX: 000000000000002d RBX: ffff88805b9a3b80 RCX: 8c5e2f152c391600
RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000
RBP: ffffc900039bf910 R08: ffffc900039bf587 R09: 1ffff92000737eb0
R10: dffffc0000000000 R11: fffff52000737eb1 R12: fffffa000000000a
R13: dffffc0000000000 R14: ffff88805b9a3b80 R15: 1ffff92000737f10
FS:  00007fc6bb0096c0(0000) GS:ffff888125c85000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f5c47172368 CR3: 000000003134e000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400