loop4: detected capacity change from 0 to 32768
BUG at fs/jfs/jfs_dmap.c:3028 assert(bitno < 32)
------------[ cut here ]------------
kernel BUG at fs/jfs/jfs_dmap.c:3028!
Oops: invalid opcode: 0000 [#1] SMP KASAN PTI
CPU: 1 UID: 0 PID: 11500 Comm: syz.4.650 Not tainted 6.16.0-rc1-syzkaller-00203-g4774cfe3543a #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
RIP: 0010:dbFindBits+0x19e/0x1a0 fs/jfs/jfs_dmap.c:3028
Code: ec fd 90 0f 0b e8 02 ea 84 fe 48 c7 c7 00 af c3 8b 48 c7 c6 40 ac c3 8b ba d4 0b 00 00 48 c7 c1 e0 b6 c3 8b e8 f3 28 ec fd 90 <0f> 0b 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 55 41 57 41
RSP: 0018:ffffc9000492f330 EFLAGS: 00010246
RAX: 0000000000000030 RBX: 0000000000000000 RCX: 5198f092fb764a00
RDX: ffffc900134a2000 RSI: 0000000000003a07 RDI: 0000000000003a08
RBP: 00000000ffffffff R08: ffffc9000492f047 R09: 1ffff92000925e08
R10: dffffc0000000000 R11: fffff52000925e09 R12: 0000000000000001
R13: 0000000000000000 R14: 0000000000000001 R15: 0000000000000020
FS:  00007fc8e1d2a6c0(0000) GS:ffff888125d86000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fc8dedf6d58 CR3: 000000007bdee000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 dbAllocDmapLev+0x16b/0x3c0 fs/jfs/jfs_dmap.c:1977
 dbAllocCtl+0x14a/0x9b0 fs/jfs/jfs_dmap.c:1817
 dbAllocAG+0x1e8/0xf10 fs/jfs/jfs_dmap.c:1353
 dbAlloc+0x5a8/0xba0 fs/jfs/jfs_dmap.c:877
 dtSplitUp fs/jfs/jfs_dtree.c:982 [inline]
 dtInsert+0xad5/0x5f40 fs/jfs/jfs_dtree.c:871
 jfs_rename+0x7bc/0x1610 fs/jfs/namei.c:1225
 vfs_rename+0xb99/0xec0 fs/namei.c:5128
 do_renameat2+0x878/0xc50 fs/namei.c:5277
 __do_sys_rename fs/namei.c:5324 [inline]
 __se_sys_rename fs/namei.c:5322 [inline]
 __x64_sys_rename+0x82/0x90 fs/namei.c:5322
 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: 0033:0x7fc8e0f8e929
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:00007fc8e1d2a038 EFLAGS: 00000246 ORIG_RAX: 0000000000000052
RAX: ffffffffffffffda RBX: 00007fc8e11b5fa0 RCX: 00007fc8e0f8e929
RDX: 0000000000000000 RSI: 0000200000000100 RDI: 0000200000000000
RBP: 00007fc8e1010b39 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007fc8e11b5fa0 R15: 00007ffffafeb178
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:dbFindBits+0x19e/0x1a0 fs/jfs/jfs_dmap.c:3028
Code: ec fd 90 0f 0b e8 02 ea 84 fe 48 c7 c7 00 af c3 8b 48 c7 c6 40 ac c3 8b ba d4 0b 00 00 48 c7 c1 e0 b6 c3 8b e8 f3 28 ec fd 90 <0f> 0b 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 55 41 57 41
RSP: 0018:ffffc9000492f330 EFLAGS: 00010246
RAX: 0000000000000030 RBX: 0000000000000000 RCX: 5198f092fb764a00
RDX: ffffc900134a2000 RSI: 0000000000003a07 RDI: 0000000000003a08
RBP: 00000000ffffffff R08: ffffc9000492f047 R09: 1ffff92000925e08
R10: dffffc0000000000 R11: fffff52000925e09 R12: 0000000000000001
R13: 0000000000000000 R14: 0000000000000001 R15: 0000000000000020
FS:  00007fc8e1d2a6c0(0000) GS:ffff888125c86000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fc8d68e3000 CR3: 000000007bdee000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400