loop1: detected capacity change from 0 to 32768
------------[ cut here ]------------
WARNING: CPU: 1 PID: 11626 at fs/jfs/jfs_dmap.c:2875 dbAdjTree+0x454/0x4e0
Modules linked in:
CPU: 1 UID: 0 PID: 11626 Comm: syz.1.971 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:dbAdjTree+0x454/0x4e0
Code: 5a ff ff ff e8 cd ce 7f fe eb 05 e8 c6 ce 7f fe 48 83 c4 28 5b 41 5c 41 5d 41 5e 41 5f 5d c3 cc cc cc cc cc e8 ad ce 7f 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:ffffc90007587008 EFLAGS: 00010287
RAX: ffffffff833e4773 RBX: ffff88812d2a3010 RCX: 0000000000080000
RDX: ffffc90022419000 RSI: 00000000000004c2 RDI: 00000000000004c3
RBP: 0000000000004059 R08: 0000000000000000 R09: 0000000000000000
R10: ffff88812d2a3810 R11: ffffed1025a54703 R12: ffff88812d2a3018
R13: dffffc0000000000 R14: 0000000000000006 R15: 0000000000000155
FS:  00007fae59d6a6c0(0000) GS:ffff8881a417e000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000110c3258d4 CR3: 000000012069e000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 dbSplit+0x132/0x200
 dbAllocBits+0x3f4/0xa60
 dbAllocNear+0x2aa/0x3d0
 dbAlloc+0x933/0xba0
 extAlloc+0x54a/0xfb0
 jfs_get_block+0x346/0xab0
 __blockdev_direct_IO+0x16ff/0x3490
 jfs_direct_IO+0x119/0x220
 generic_file_direct_write+0x1db/0x3e0
 __generic_file_write_iter+0x11d/0x230
 generic_file_write_iter+0x117/0x550
 vfs_write+0x5c9/0xb30
 ksys_write+0x145/0x250
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fae58f8ec29
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:00007fae59d6a038 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007fae591d5fa0 RCX: 00007fae58f8ec29
RDX: 0000000000048400 RSI: 0000200000000200 RDI: 0000000000000007
RBP: 00007fae59011e41 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fae591d6038 R14: 00007fae591d5fa0 R15: 00007ffd7daf0b88
 </TASK>
