------------[ cut here ]------------
WARNING: fs/jfs/jfs_dmap.c:2875 at dbAdjTree+0x454/0x4e0, CPU#0: syz.1.1642/11857
Modules linked in:
CPU: 0 UID: 0 PID: 11857 Comm: syz.1.1642 Tainted: G             L      syzkaller #0 PREEMPT(full) 
Tainted: [L]=SOFTLOCKUP
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
RIP: 0010:dbAdjTree+0x454/0x4e0
Code: 5a ff ff ff e8 fd 42 74 fe eb 05 e8 f6 42 74 fe 48 83 c4 28 5b 41 5c 41 5d 41 5e 41 5f 5d e9 43 49 2a 08 cc e8 dd 42 74 fe 90 <0f> 0b 90 eb e1 44 89 e1 80 e1 07 80 c1 03 38 c1 0f 8c e1 fb ff ff
RSP: 0018:ffffc90007d2f220 EFLAGS: 00010283
RAX: ffffffff834e39a3 RBX: ffff88811ae7e010 RCX: 0000000000080000
RDX: ffffc900255aa000 RSI: 000000000000f6eb RDI: 000000000000f6ec
RBP: 0000000000002057 R08: 0000000000000000 R09: 1ffffd40008d73f0
R10: dffffc0000000000 R11: fffff940008d73f1 R12: ffff88811ae7e018
R13: dffffc0000000000 R14: 0000000000000005 R15: 0000000000000155
FS:  00007f7fbf3286c0(0000) GS:ffff88818e409000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000020000000f000 CR3: 0000000119eea000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 dbSplit+0x132/0x200
 dbAllocBits+0x502/0xa60
 dbAllocDmap+0x6b/0x150
 dbAlloc+0x46c/0xba0
 extAlloc+0x57d/0x1020
 jfs_get_block+0x358/0xad0
 __block_write_begin_int+0x6c6/0x1910
 block_write_begin+0x8d/0x120
 jfs_write_begin+0x35/0x80
 generic_perform_write+0x2e2/0x8f0
 generic_file_write_iter+0x14a/0x680
 vfs_write+0x61d/0xb90
 __x64_sys_pwrite64+0x199/0x230
 do_syscall_64+0xe2/0xf80
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f7fbe39acb9
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:00007f7fbf328028 EFLAGS: 00000246 ORIG_RAX: 0000000000000012
RAX: ffffffffffffffda RBX: 00007f7fbe615fa0 RCX: 00007f7fbe39acb9
RDX: 00000000ffffff07 RSI: 0000200000000140 RDI: 0000000000000006
RBP: 00007f7fbe408bf7 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000008000c61 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f7fbe616038 R14: 00007f7fbe615fa0 R15: 00007ffdfd8f6278
 </TASK>
