loop2: detected capacity change from 0 to 32768
BUG at fs/jfs/jfs_dmap.c:3036 assert(bitno < 32)
------------[ cut here ]------------
kernel BUG at fs/jfs/jfs_dmap.c:3036!
Oops: invalid opcode: 0000 [#1] SMP KASAN PTI
CPU: 1 UID: 0 PID: 6901 Comm: syz.2.150 Not tainted syzkaller #0 PREEMPT_{RT,(full)} 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
RIP: 0010:dbFindBits+0x19e/0x1a0 fs/jfs/jfs_dmap.c:3036
Code: f2 fd 90 0f 0b e8 12 06 8a fe 48 c7 c7 40 75 43 8b 48 c7 c6 80 72 43 8b ba dc 0b 00 00 48 c7 c1 20 7d 43 8b e8 43 fa f2 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:ffffc90005917348 EFLAGS: 00010246
RAX: 0000000000000030 RBX: 0000000000000000 RCX: 1423bd96852e1a00
RDX: ffffc9000d1c1000 RSI: 0000000000001b6b RDI: 0000000000001b6c
RBP: 00000000ffffffff R08: 0000000000000000 R09: 0000000000000000
R10: dffffc0000000000 R11: fffff52000b22e0d R12: 0000000000000001
R13: 0000000000000000 R14: 0000000000000001 R15: 0000000000000020
FS:  00007f0a356066c0(0000) GS:ffff8881269c2000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f8b65e8c000 CR3: 00000000239d4000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 dbAllocDmapLev+0x16b/0x3c0 fs/jfs/jfs_dmap.c:1985
 dbAllocCtl+0x14a/0x9c0 fs/jfs/jfs_dmap.c:1825
 dbAllocAG+0x1e6/0xff0 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+0xbd7/0xf00 fs/namei.c:5129
 do_renameat2+0x6ce/0xa80 fs/namei.c:5278
 __do_sys_renameat2 fs/namei.c:5312 [inline]
 __se_sys_renameat2 fs/namei.c:5309 [inline]
 __x64_sys_renameat2+0xce/0xe0 fs/namei.c:5309
 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: 0033:0x7f0a3739ebe9
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:00007f0a35606038 EFLAGS: 00000246 ORIG_RAX: 000000000000013c
RAX: ffffffffffffffda RBX: 00007f0a375c5fa0 RCX: 00007f0a3739ebe9
RDX: 0000000000000005 RSI: 0000200000000140 RDI: 0000000000000005
RBP: 00007f0a37421e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000200000000980 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f0a375c6038 R14: 00007f0a375c5fa0 R15: 00007ffe39be7ea8
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:dbFindBits+0x19e/0x1a0 fs/jfs/jfs_dmap.c:3036
Code: f2 fd 90 0f 0b e8 12 06 8a fe 48 c7 c7 40 75 43 8b 48 c7 c6 80 72 43 8b ba dc 0b 00 00 48 c7 c1 20 7d 43 8b e8 43 fa f2 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:ffffc90005917348 EFLAGS: 00010246
RAX: 0000000000000030 RBX: 0000000000000000 RCX: 1423bd96852e1a00
RDX: ffffc9000d1c1000 RSI: 0000000000001b6b RDI: 0000000000001b6c
RBP: 00000000ffffffff R08: 0000000000000000 R09: 0000000000000000
R10: dffffc0000000000 R11: fffff52000b22e0d R12: 0000000000000001
R13: 0000000000000000 R14: 0000000000000001 R15: 0000000000000020
FS:  00007f0a356066c0(0000) GS:ffff8881269c2000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f8b65e8c000 CR3: 00000000239d4000 CR4: 00000000003526f0