loop0: detected capacity change from 0 to 32768
ERROR: (device loop0): dbAdjCtl: the maximum free buddy is not the old root
ERROR: (device loop0): remounting filesystem as read-only
syz.0.0: attempt to access beyond end of device
loop0: rw=34817, sector=28368, nr_sectors = 128 limit=28263
ERROR: (device loop0): xtTruncate: xt_getpage: xtree page corrupt
ERROR: (device loop0): remounting filesystem as read-only
BUG at fs/jfs/jfs_txnmgr.c:530 assert(tblk->next == 0)
------------[ cut here ]------------
kernel BUG at fs/jfs/jfs_txnmgr.c:530!
Oops: invalid opcode: 0000 [#1] SMP KASAN NOPTI
CPU: 0 UID: 0 PID: 5330 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:txEnd+0x51f/0x530 fs/jfs/jfs_txnmgr.c:530
Code: e9 cc fe ff ff e8 d1 d7 61 fe 48 c7 c7 20 1b 0c 8c 48 c7 c6 19 17 0c 8c ba 12 02 00 00 48 c7 c1 60 1b 0c 8c e8 22 b4 c3 fd 90 <0f> 0b 66 66 66 66 66 66 2e 0f 1f 84 00 00 00 00 00 90 90 90 90 90
RSP: 0018:ffffc9000ea4f3a0 EFLAGS: 00010246
RAX: 0000000000000036 RBX: ffff8880434e2800 RCX: 4f71683a8cc79700
RDX: ffffc9000ee19000 RSI: 00000000000fffff RDI: 0000000000100000
RBP: ffffc90000e99222 R08: ffff88801fc247d3 R09: 1ffff11003f848fa
R10: dffffc0000000000 R11: ffffed1003f848fb R12: 1ffff920001d3249
R13: dffffc0000000000 R14: ffffc90000e99248 R15: 0000000000000004
FS:  00007f631a6ae6c0(0000) GS:ffff88808c881000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fc15d775000 CR3: 0000000012600000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 jfs_truncate_nolock+0x2b6/0x340 fs/jfs/inode.c:399
 jfs_truncate+0xce/0x140 fs/jfs/inode.c:420
 jfs_direct_IO+0x1f4/0x220 fs/jfs/inode.c:350
 generic_file_direct_write+0x1db/0x3e0 mm/filemap.c:4259
 __generic_file_write_iter+0x11d/0x230 mm/filemap.c:4428
 generic_file_write_iter+0x14a/0x680 mm/filemap.c:4468
 iter_file_splice_write+0x9a1/0x10f0 fs/splice.c:736
 do_splice_from fs/splice.c:936 [inline]
 direct_splice_actor+0x101/0x160 fs/splice.c:1159
 splice_direct_to_actor+0x53a/0xc70 fs/splice.c:1103
 do_splice_direct_actor fs/splice.c:1202 [inline]
 do_splice_direct+0x195/0x290 fs/splice.c:1228
 do_sendfile+0x535/0x7d0 fs/read_write.c:1372
 __do_sys_sendfile64 fs/read_write.c:1433 [inline]
 __se_sys_sendfile64+0x144/0x1a0 fs/read_write.c:1419
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x15f/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f631979ce59
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:00007f631a6adfe8 EFLAGS: 00000246 ORIG_RAX: 0000000000000028
RAX: ffffffffffffffda RBX: 00007f6319a15fa0 RCX: 00007f631979ce59
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 0000000000000005
RBP: 00007f6319832d6f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000020fffe82 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f6319a16038 R14: 00007f6319a15fa0 R15: 00007ffc992350f8
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:txEnd+0x51f/0x530 fs/jfs/jfs_txnmgr.c:530
Code: e9 cc fe ff ff e8 d1 d7 61 fe 48 c7 c7 20 1b 0c 8c 48 c7 c6 19 17 0c 8c ba 12 02 00 00 48 c7 c1 60 1b 0c 8c e8 22 b4 c3 fd 90 <0f> 0b 66 66 66 66 66 66 2e 0f 1f 84 00 00 00 00 00 90 90 90 90 90
RSP: 0018:ffffc9000ea4f3a0 EFLAGS: 00010246
RAX: 0000000000000036 RBX: ffff8880434e2800 RCX: 4f71683a8cc79700
RDX: ffffc9000ee19000 RSI: 00000000000fffff RDI: 0000000000100000
RBP: ffffc90000e99222 R08: ffff88801fc247d3 R09: 1ffff11003f848fa
R10: dffffc0000000000 R11: ffffed1003f848fb R12: 1ffff920001d3249
R13: dffffc0000000000 R14: ffffc90000e99248 R15: 0000000000000004
FS:  00007f631a6ae6c0(0000) GS:ffff88808c881000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fc15d775000 CR3: 0000000012600000 CR4: 0000000000352ef0