ffff8881babe30f8: 04 00 00 00                                      ....
BUG at fs/jfs/jfs_dmap.c:3021 assert(nb <= DBWORD)
------------[ cut here ]------------
kernel BUG at fs/jfs/jfs_dmap.c:3021!
Oops: invalid opcode: 0000 [#1] SMP KASAN PTI
CPU: 1 UID: 0 PID: 25954 Comm: syz.6.2373 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
RIP: 0010:dbFindBits+0x177/0x1a0
Code: e9 20 ff ff ff e8 99 e2 7b fe 48 c7 c7 00 6e a4 8b 48 c7 c6 40 6b a4 8b ba cd 0b 00 00 48 c7 c1 c0 75 a4 8b e8 2a 70 e3 fd 90 <0f> 0b e8 72 e2 7b fe 48 c7 c7 00 6e a4 8b 48 c7 c6 40 6b a4 8b ba
RSP: 0018:ffffc900084efa98 EFLAGS: 00010246
RAX: 0000000000000032 RBX: 000000000000000a RCX: 0618778419179500
RDX: ffffc900098e4000 RSI: 0000000000000bad RDI: 0000000000000bae
RBP: 0000000000000000 R08: ffffc900084ef7c7 R09: 1ffff9200109def8
R10: dffffc0000000000 R11: fffff5200109def9 R12: 0000000000000ea0
R13: 000000000000000a R14: 0000000000000400 R15: ffff88816fcba000
FS:  00007f6fc41ac6c0(0000) GS:ffff8882a9f38000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f6fb900f000 CR3: 00000001a8e40000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 dbAllocDmapLev+0x16b/0x3c0
 dbAllocCtl+0x14a/0x9c0
 dbAllocAG+0x1e6/0xff0
 dbDiscardAG+0x2df/0x900
 jfs_ioc_trim+0x429/0x690
 jfs_ioctl+0x2b5/0x3d0
 __se_sys_ioctl+0xfc/0x170
 do_syscall_64+0xfa/0xfa0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f6fc338f6c9
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:00007f6fc41ac038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f6fc35e5fa0 RCX: 00007f6fc338f6c9
RDX: 0000200000000080 RSI: 00000000c0185879 RDI: 0000000000000006
RBP: 00007f6fc3411f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f6fc35e6038 R14: 00007f6fc35e5fa0 R15: 00007ffdf0bdcfd8
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:dbFindBits+0x177/0x1a0
Code: e9 20 ff ff ff e8 99 e2 7b fe 48 c7 c7 00 6e a4 8b 48 c7 c6 40 6b a4 8b ba cd 0b 00 00 48 c7 c1 c0 75 a4 8b e8 2a 70 e3 fd 90 <0f> 0b e8 72 e2 7b fe 48 c7 c7 00 6e a4 8b 48 c7 c6 40 6b a4 8b ba
RSP: 0018:ffffc900084efa98 EFLAGS: 00010246
RAX: 0000000000000032 RBX: 000000000000000a RCX: 0618778419179500
RDX: ffffc900098e4000 RSI: 0000000000000bad RDI: 0000000000000bae
RBP: 0000000000000000 R08: ffffc900084ef7c7 R09: 1ffff9200109def8
R10: dffffc0000000000 R11: fffff5200109def9 R12: 0000000000000ea0
R13: 000000000000000a R14: 0000000000000400 R15: ffff88816fcba000
FS:  00007f6fc41ac6c0(0000) GS:ffff88818eb38000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f6fb9583000 CR3: 00000001a8e40000 CR4: 00000000000006f0
