loop0: detected capacity change from 0 to 32768

 ... Log Wrap ... Log Wrap ... Log Wrap ...

ERROR: (device loop0): diWrite: ixpxd invalid

ERROR: (device loop0): txCommit: 

loop0: detected capacity change from 32768 to 32767
dmapctl: invalid nleafs 4294967295 (max 1024)
ERROR: (device loop0): dbAdjCtl: Corrupt dmapctl page

ERROR: (device loop0): dbDiscardAG: -EIO

dmapctl: invalid nleafs 4294967295 (max 1024)
ERROR: (device loop0): dbAdjCtl: Corrupt dmapctl page

BUG at fs/jfs/jfs_dmap.c:2787 assert(leaf[leafno] == NOFREE)
------------[ cut here ]------------
kernel BUG at fs/jfs/jfs_dmap.c:2787!
Oops: invalid opcode: 0000 [#1] SMP KASAN NOPTI
CPU: 0 UID: 0 PID: 5323 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:dbBackSplit+0x57c/0x580 fs/jfs/jfs_dmap.c:2787
Code: e9 02 fc ff ff e8 e4 1e 5a fe 48 c7 c7 20 6d 4d 8c 48 c7 c6 60 6a 4d 8c ba e3 0a 00 00 48 c7 c1 40 74 4d 8c e8 b5 a8 ba fd 90 <0f> 0b 66 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 55 41
RSP: 0018:ffffc9000eae7bc0 EFLAGS: 00010246
RAX: 000000000000003c RBX: 000000000000000a RCX: a3b5e88a5fe9d900
RDX: ffffc9000f419000 RSI: 0000000000002e05 RDI: 0000000000002e06
RBP: 0000000000000000 R08: ffff88801fc246d3 R09: 1ffff11003f848da
R10: dffffc0000000000 R11: ffffed1003f848db R12: 0000000000000020
R13: ffff888000174010 R14: ffff888000174096 R15: ffff888000174076
FS:  00007f66b39eb6c0(0000) GS:ffff88808c30a000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000560b861d9c58 CR3: 000000001d3d5000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 dbFreeDmap fs/jfs/jfs_dmap.c:2195 [inline]
 dbFree+0x53f/0x650 fs/jfs/jfs_dmap.c:485
 dbDiscardAG+0x7b5/0x8f0 fs/jfs/jfs_dmap.c:1732
 jfs_ioc_trim+0x436/0x680 fs/jfs/jfs_discard.c:106
 jfs_ioctl+0x28e/0x3b0 fs/jfs/ioctl.c:131
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:597 [inline]
 __se_sys_ioctl+0xfc/0x170 fs/ioctl.c:583
 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline]
 do_syscall_64+0x166/0x520 arch/x86/entry/syscall_64.c:84
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f66b2b9e0d9
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:00007f66b39eafe8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f66b2e25fa0 RCX: 00007f66b2b9e0d9
RDX: 0000200000000080 RSI: 00000000c0185879 RDI: 0000000000000005
RBP: 00007f66b2c35024 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f66b2e26038 R14: 00007f66b2e25fa0 R15: 00007ffdbb4ea138
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:dbBackSplit+0x57c/0x580 fs/jfs/jfs_dmap.c:2787
Code: e9 02 fc ff ff e8 e4 1e 5a fe 48 c7 c7 20 6d 4d 8c 48 c7 c6 60 6a 4d 8c ba e3 0a 00 00 48 c7 c1 40 74 4d 8c e8 b5 a8 ba fd 90 <0f> 0b 66 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 55 41
RSP: 0018:ffffc9000eae7bc0 EFLAGS: 00010246
RAX: 000000000000003c RBX: 000000000000000a RCX: a3b5e88a5fe9d900
RDX: ffffc9000f419000 RSI: 0000000000002e05 RDI: 0000000000002e06
RBP: 0000000000000000 R08: ffff88801fc246d3 R09: 1ffff11003f848da
R10: dffffc0000000000 R11: ffffed1003f848db R12: 0000000000000020
R13: ffff888000174010 R14: ffff888000174096 R15: ffff888000174076
FS:  00007f66b39eb6c0(0000) GS:ffff88808c30a000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000560b861d9c58 CR3: 000000001d3d5000 CR4: 0000000000352ef0