loop0: detected capacity change from 0 to 32768
 ... Log Wrap ... Log Wrap ... Log Wrap ...
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BUG at fs/jfs/jfs_txnmgr.c:933 assert(mp->nohomeok > 0)
------------[ cut here ]------------
kernel BUG at fs/jfs/jfs_txnmgr.c:933!
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:txUnlock+0xda1/0xdf0 fs/jfs/jfs_txnmgr.c:933
Code: c3 fd 90 0f 0b e8 bf 30 61 fe 48 c7 c7 60 1f 0c 8c 48 c7 c6 59 1b 0c 8c ba a5 03 00 00 48 c7 c1 60 2c 0c 8c e8 f0 18 c3 fd 90 <0f> 0b e8 98 30 61 fe 48 c7 c7 60 1f 0c 8c 48 c7 c6 59 1b 0c 8c ba
RSP: 0018:ffffc9000574f528 EFLAGS: 00010246
RAX: 0000000000000037 RBX: 0000000000001000 RCX: bf1e72213f7c6b00
RDX: ffffc90020802000 RSI: 0000000000003817 RDI: 0000000000003818
RBP: ffffc90001056090 R08: ffffc9000574f2a7 R09: 1ffff92000ae9e54
R10: dffffc0000000000 R11: fffff52000ae9e55 R12: dffffc0000000000
R13: 1ffff110000585c7 R14: ffff8880002c2e38 R15: 0000000000000000
FS:  00007fab3586f6c0(0000) GS:ffff88808c87b000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f266a5be000 CR3: 0000000012aa0000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 txCommit+0x4f20/0x5410 fs/jfs/jfs_txnmgr.c:1337
 jfs_commit_inode+0x2ef/0x530 fs/jfs/inode.c:114
 jfs_fsync+0x197/0x210 fs/jfs/file.c:38
 generic_write_sync include/linux/fs.h:2654 [inline]
 generic_file_write_iter+0x37e/0x680 mm/filemap.c:4472
 do_iter_readv_writev+0x619/0x8c0 fs/read_write.c:-1
 vfs_writev+0x33c/0x990 fs/read_write.c:1059
 do_pwritev fs/read_write.c:1155 [inline]
 __do_sys_pwritev2 fs/read_write.c:1213 [inline]
 __se_sys_pwritev2+0x184/0x2a0 fs/read_write.c:1204
 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: 0033:0x7fab3499ce59
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:00007fab3586efe8 EFLAGS: 00000246 ORIG_RAX: 0000000000000148
RAX: ffffffffffffffda RBX: 00007fab34c15fa0 RCX: 00007fab3499ce59
RDX: 0000000000000001 RSI: 00002000000001c0 RDI: 0000000000000004
RBP: 00007fab34a32d6f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000040e7b R11: 0000000000000246 R12: 0000000000000000
R13: 00007fab34c16038 R14: 00007fab34c15fa0 R15: 00007fffb384c898
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:txUnlock+0xda1/0xdf0 fs/jfs/jfs_txnmgr.c:933
Code: c3 fd 90 0f 0b e8 bf 30 61 fe 48 c7 c7 60 1f 0c 8c 48 c7 c6 59 1b 0c 8c ba a5 03 00 00 48 c7 c1 60 2c 0c 8c e8 f0 18 c3 fd 90 <0f> 0b e8 98 30 61 fe 48 c7 c7 60 1f 0c 8c 48 c7 c6 59 1b 0c 8c ba
RSP: 0018:ffffc9000574f528 EFLAGS: 00010246
RAX: 0000000000000037 RBX: 0000000000001000 RCX: bf1e72213f7c6b00
RDX: ffffc90020802000 RSI: 0000000000003817 RDI: 0000000000003818
RBP: ffffc90001056090 R08: ffffc9000574f2a7 R09: 1ffff92000ae9e54
R10: dffffc0000000000 R11: fffff52000ae9e55 R12: dffffc0000000000
R13: 1ffff110000585c7 R14: ffff8880002c2e38 R15: 0000000000000000
FS:  00007fab3586f6c0(0000) GS:ffff88808c87b000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f266a5be000 CR3: 0000000012aa0000 CR4: 0000000000352ef0