loop0: detected capacity change from 0 to 32768
ERROR: (device loop0): diAllocBit: iag inconsistent
ialloc: diAlloc returned -5!
BUG at fs/jfs/jfs_dmap.c:3009 assert(nb <= DBWORD)
------------[ cut here ]------------
kernel BUG at fs/jfs/jfs_dmap.c:3009!
Oops: invalid opcode: 0000 [#1] SMP KASAN NOPTI
CPU: 0 UID: 0 PID: 5317 Comm: syz.0.0 Not tainted 6.15.0-rc5-syzkaller-00123-g2c89c1b655c0 #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
RIP: 0010:dbFindBits+0x177/0x1a0 fs/jfs/jfs_dmap.c:3009
Code: e9 20 ff ff ff e8 e9 1b 86 fe 48 c7 c7 40 64 a3 8b 48 c7 c6 80 61 a3 8b ba c1 0b 00 00 48 c7 c1 00 6c a3 8b e8 da dc ed fd 90 <0f> 0b e8 c2 1b 86 fe 48 c7 c7 40 64 a3 8b 48 c7 c6 80 61 a3 8b ba
RSP: 0018:ffffc9000d72fac8 EFLAGS: 00010246
RAX: 0000000000000032 RBX: 000000000000000a RCX: b6a10be11f156100
RDX: ffffc9000e142000 RSI: 0000000000000d30 RDI: 0000000000000d31
RBP: 00000000ffffffff R08: ffffc9000d72f7a7 R09: 1ffff92001ae5ef4
R10: dffffc0000000000 R11: fffff52001ae5ef5 R12: 0000000000000000
R13: 000000000000000a R14: 0000000000000400 R15: ffff888052d87000
FS:  00007fd943d836c0(0000) GS:ffff88808d6cc000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f98f75909c0 CR3: 000000003f5f5000 CR4: 0000000000352ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 dbAllocDmapLev+0x16b/0x3c0 fs/jfs/jfs_dmap.c:1973
 dbAllocCtl+0x14a/0x9b0 fs/jfs/jfs_dmap.c:1813
 dbAllocAG+0x1e8/0xf10 fs/jfs/jfs_dmap.c:1349
 dbDiscardAG+0x2df/0x900 fs/jfs/jfs_dmap.c:1598
 jfs_ioc_trim+0x436/0x670 fs/jfs/jfs_discard.c:105
 jfs_ioctl+0x2b5/0x3d0 fs/jfs/ioctl.c:131
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:906 [inline]
 __se_sys_ioctl+0xf9/0x170 fs/ioctl.c:892
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xf6/0x210 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fd942f8e969
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:00007fd943d83038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007fd9431b5fa0 RCX: 00007fd942f8e969
RDX: 0000200000000080 RSI: 00000000c0185879 RDI: 0000000000000009
RBP: 00007fd943010ab1 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007fd9431b5fa0 R15: 00007ffd0f1b9628
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:dbFindBits+0x177/0x1a0 fs/jfs/jfs_dmap.c:3009
Code: e9 20 ff ff ff e8 e9 1b 86 fe 48 c7 c7 40 64 a3 8b 48 c7 c6 80 61 a3 8b ba c1 0b 00 00 48 c7 c1 00 6c a3 8b e8 da dc ed fd 90 <0f> 0b e8 c2 1b 86 fe 48 c7 c7 40 64 a3 8b 48 c7 c6 80 61 a3 8b ba
RSP: 0018:ffffc9000d72fac8 EFLAGS: 00010246
RAX: 0000000000000032 RBX: 000000000000000a RCX: b6a10be11f156100
RDX: ffffc9000e142000 RSI: 0000000000000d30 RDI: 0000000000000d31
RBP: 00000000ffffffff R08: ffffc9000d72f7a7 R09: 1ffff92001ae5ef4
R10: dffffc0000000000 R11: fffff52001ae5ef5 R12: 0000000000000000
R13: 000000000000000a R14: 0000000000000400 R15: ffff888052d87000
FS:  00007fd943d836c0(0000) GS:ffff88808d6cc000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fd943d5ff70 CR3: 000000003f5f5000 CR4: 0000000000352ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400