loop0: 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 NOPTI
CPU: 0 UID: 0 PID: 5315 Comm: syz.0.0 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
RIP: 0010:dbFindBits+0x19e/0x1a0 fs/jfs/jfs_dmap.c:3036
Code: cb fd 90 0f 0b e8 62 2b 69 fe 48 c7 c7 60 28 0b 8c 48 c7 c6 a0 25 0b 8c ba dc 0b 00 00 48 c7 c1 a0 30 0b 8c e8 73 49 cb 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:ffffc9000f6c7368 EFLAGS: 00010246
RAX: 0000000000000030 RBX: 0000000000000000 RCX: 417cae26d36b3e00
RDX: ffffc9000ecca000 RSI: 0000000000001ae6 RDI: 0000000000001ae7
RBP: 00000000ffffffff R08: ffffc9000f6c70e7 R09: 1ffff92001ed8e1c
R10: dffffc0000000000 R11: fffff52001ed8e1d R12: 0000000000000001
R13: 0000000000000000 R14: 0000000000000001 R15: 0000000000000020
FS:  00007f3a960146c0(0000) GS:ffff88808ca5b000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f14bdea22c0 CR3: 00000000443b3000 CR4: 0000000000352ef0
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+0x5ab/0xba0 fs/jfs/jfs_dmap.c:877
 dtSplitUp fs/jfs/jfs_dtree.c:982 [inline]
 dtInsert+0xb53/0x5f10 fs/jfs/jfs_dtree.c:871
 jfs_rename+0x89d/0x1860 fs/jfs/namei.c:1226
 vfs_rename+0xa96/0xeb0 fs/namei.c:6026
 filename_renameat2+0x539/0x9c0 fs/namei.c:6144
 __do_sys_rename fs/namei.c:6188 [inline]
 __se_sys_rename+0x55/0x2c0 fs/namei.c:6184
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x14d/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f3a9519c629
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f3a96014028 EFLAGS: 00000246 ORIG_RAX: 0000000000000052
RAX: ffffffffffffffda RBX: 00007f3a95415fa0 RCX: 00007f3a9519c629
RDX: 0000000000000000 RSI: 0000200000000f40 RDI: 00002000000003c0
RBP: 00007f3a95232b39 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f3a95416038 R14: 00007f3a95415fa0 R15: 00007ffd3dffcec8
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:dbFindBits+0x19e/0x1a0 fs/jfs/jfs_dmap.c:3036
Code: cb fd 90 0f 0b e8 62 2b 69 fe 48 c7 c7 60 28 0b 8c 48 c7 c6 a0 25 0b 8c ba dc 0b 00 00 48 c7 c1 a0 30 0b 8c e8 73 49 cb 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:ffffc9000f6c7368 EFLAGS: 00010246
RAX: 0000000000000030 RBX: 0000000000000000 RCX: 417cae26d36b3e00
RDX: ffffc9000ecca000 RSI: 0000000000001ae6 RDI: 0000000000001ae7
RBP: 00000000ffffffff R08: ffffc9000f6c70e7 R09: 1ffff92001ed8e1c
R10: dffffc0000000000 R11: fffff52001ed8e1d R12: 0000000000000001
R13: 0000000000000000 R14: 0000000000000001 R15: 0000000000000020
FS:  00007f3a960146c0(0000) GS:ffff88808ca5b000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f3a95ff2ff0 CR3: 00000000443b3000 CR4: 0000000000352ef0