loop0: detected capacity change from 0 to 32768
UFO tlock:0xffffc9000154d168
Freezing with imperfect legacy cgroup freezer. See cgroup.freeze of cgroup v2
UFO tlock:0xffffc9000154d048
BUG at fs/jfs/jfs_txnmgr.c:662 assert(last)
------------[ cut here ]------------
kernel BUG at fs/jfs/jfs_txnmgr.c:662!
Oops: invalid opcode: 0000 [#1] SMP KASAN NOPTI
CPU: 0 UID: 0 PID: 5320 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~bpo12+1 04/01/2014
RIP: 0010:txLock+0x1b79/0x1cb0 fs/jfs/jfs_txnmgr.c:662
Code: e9 6a f8 ff ff e8 37 e5 76 fe 48 c7 c7 60 bf a4 8b 48 c7 c6 59 bb a4 8b ba 96 02 00 00 48 c7 c1 60 c0 a4 8b e8 a8 63 de fd 90 <0f> 0b e8 10 e5 76 fe 48 c7 c7 20 c1 a4 8b e8 94 63 de fd 48 c7 c7
RSP: 0018:ffffc9000d5c6fe0 EFLAGS: 00010246
RAX: 000000000000002b RBX: 0000000000000000 RCX: 75e2db5f8ee45b00
RDX: ffffc9000e10a000 RSI: 0000000000014b6b RDI: 0000000000014b6c
RBP: ffffc9000d5c7108 R08: ffffc9000d5c6d07 R09: 1ffff92001ab8da0
R10: dffffc0000000000 R11: fffff52001ab8da1 R12: 1ffff920002a9a00
R13: ffffc9000154d000 R14: 0000000000000000 R15: 0000000000000000
FS:  00007fb254f0a6c0(0000) GS:ffff88808d72d000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000020000001e000 CR3: 0000000042d9e000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 diWrite+0x444/0x1f40 fs/jfs/jfs_imap.c:654
 txCommit+0x852/0x5430 fs/jfs/jfs_txnmgr.c:1256
 jfs_commit_inode+0x2ef/0x530 fs/jfs/inode.c:114
 extAlloc+0xc3b/0xfb0 fs/jfs/jfs_extent.c:177
 jfs_get_block+0x346/0xab0 fs/jfs/inode.c:254
 __block_write_begin_int+0x6b5/0x1900 fs/buffer.c:2145
 block_write_begin+0x8a/0x120 fs/buffer.c:2256
 jfs_write_begin+0x35/0x80 fs/jfs/inode.c:306
 generic_perform_write+0x2c5/0x900 mm/filemap.c:4255
 generic_file_write_iter+0x117/0x550 mm/filemap.c:4398
 new_sync_write fs/read_write.c:593 [inline]
 vfs_write+0x5c9/0xb30 fs/read_write.c:686
 ksys_write+0x145/0x250 fs/read_write.c:738
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xfa/0xfa0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fb253f8f7c9
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:00007fb254f0a038 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007fb2541e5fa0 RCX: 00007fb253f8f7c9
RDX: 00000000ffffff6a RSI: 0000200000000000 RDI: 000000000000000e
RBP: 00007fb254013f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fb2541e6038 R14: 00007fb2541e5fa0 R15: 00007ffe3ae57198
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:txLock+0x1b79/0x1cb0 fs/jfs/jfs_txnmgr.c:662
Code: e9 6a f8 ff ff e8 37 e5 76 fe 48 c7 c7 60 bf a4 8b 48 c7 c6 59 bb a4 8b ba 96 02 00 00 48 c7 c1 60 c0 a4 8b e8 a8 63 de fd 90 <0f> 0b e8 10 e5 76 fe 48 c7 c7 20 c1 a4 8b e8 94 63 de fd 48 c7 c7
RSP: 0018:ffffc9000d5c6fe0 EFLAGS: 00010246
RAX: 000000000000002b RBX: 0000000000000000 RCX: 75e2db5f8ee45b00
RDX: ffffc9000e10a000 RSI: 0000000000014b6b RDI: 0000000000014b6c
RBP: ffffc9000d5c7108 R08: ffffc9000d5c6d07 R09: 1ffff92001ab8da0
R10: dffffc0000000000 R11: fffff52001ab8da1 R12: 1ffff920002a9a00
R13: ffffc9000154d000 R14: 0000000000000000 R15: 0000000000000000
FS:  00007fb254f0a6c0(0000) GS:ffff88808d72d000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000020000001e000 CR3: 0000000042d9e000 CR4: 0000000000352ef0