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 04/01/2014
RIP: 0010:txLock+0x1b92/0x1cc0 fs/jfs/jfs_txnmgr.c:662
Code: e9 6a f8 ff ff e8 de 76 6b fe 48 c7 c7 60 fb ea 8b 48 c7 c6 59 f7 ea 8b ba 96 02 00 00 48 c7 c1 80 fc ea 8b e8 0f a1 ce fd 90 <0f> 0b e8 b7 76 6b fe 48 c7 c7 40 fd ea 8b e8 fb a0 ce fd 48 c7 c7
RSP: 0018:ffffc9000e7d5e40 EFLAGS: 00010246
RAX: 000000000000002b RBX: 0000000000000000 RCX: e973447af994ab00
RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000
RBP: ffffc9000e7d5f68 R08: ffffc9000e7d5bc7 R09: 1ffff92001cfab78
R10: dffffc0000000000 R11: fffff52001cfab79 R12: 1ffff920002a9000
R13: ffffc90001548000 R14: 0000000000000000 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff88808ccea000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f2102754000 CR3: 000000001f141000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 diWrite+0x444/0x1f40 fs/jfs/jfs_imap.c:654
 txCommit+0x869/0x5410 fs/jfs/jfs_txnmgr.c:1256
 jfs_commit_inode+0x2ef/0x530 fs/jfs/inode.c:114
 extAlloc+0xc95/0x1020 fs/jfs/jfs_extent.c:177
 jfs_get_block+0x358/0xad0 fs/jfs/inode.c:254
 __block_write_begin_int+0x6c6/0x1910 fs/buffer.c:2145
 block_write_begin+0x8d/0x120 fs/buffer.c:2256
 jfs_write_begin+0x35/0x80 fs/jfs/inode.c:306
 generic_perform_write+0x2e2/0x8f0 mm/filemap.c:4314
 generic_file_write_iter+0x14a/0x680 mm/filemap.c:4457
 __kernel_write_iter+0x41e/0x880 fs/read_write.c:619
 dump_emit_page fs/coredump.c:1298 [inline]
 dump_user_range+0xb89/0x12d0 fs/coredump.c:1372
 elf_core_dump+0x34c2/0x3ad0 fs/binfmt_elf.c:2111
 coredump_write+0x1219/0x1950 fs/coredump.c:1049
 do_coredump fs/coredump.c:1126 [inline]
 vfs_coredump+0x369e/0x4270 fs/coredump.c:1200
 get_signal+0x1107/0x1330 kernel/signal.c:3019
 arch_do_signal_or_restart+0xbc/0x830 arch/x86/kernel/signal.c:337
 __exit_to_user_mode_loop kernel/entry/common.c:41 [inline]
 exit_to_user_mode_loop kernel/entry/common.c:75 [inline]
 __exit_to_user_mode_prepare include/linux/irq-entry-common.h:226 [inline]
 irqentry_exit_to_user_mode_prepare include/linux/irq-entry-common.h:270 [inline]
 irqentry_exit_to_user_mode include/linux/irq-entry-common.h:339 [inline]
 irqentry_exit+0x176/0x620 kernel/entry/common.c:196
 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:618
RIP: 0033:0x7f016a8514f7
Code: e8 8e fa ff ff 89 f2 48 8d 3d 15 38 1b 00 48 8d 35 01 38 1b 00 31 c0 e8 e7 f8 ff ff 0f 1f 80 00 00 00 00 53 89 fb 48 83 ec 10 <64> 8b 04 25 a4 ff ff ff 85 c0 74 2a 89 fe 31 c0 bf 3c 00 00 00 e8
RSP: 002b:00007f016b8f11a0 EFLAGS: 00010206
RAX: 0000000000000000 RBX: 000000000000000b RCX: 00007f016a99aeb9
RDX: 00007f016b8f11c0 RSI: 00007f016b8f12f0 RDI: 000000000000000b
RBP: 00007f016aa08c1f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000000
R13: 00007f016ac16038 R14: 00007f016ac15fa0 R15: 00007fff5bc3d1e8
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:txLock+0x1b92/0x1cc0 fs/jfs/jfs_txnmgr.c:662
Code: e9 6a f8 ff ff e8 de 76 6b fe 48 c7 c7 60 fb ea 8b 48 c7 c6 59 f7 ea 8b ba 96 02 00 00 48 c7 c1 80 fc ea 8b e8 0f a1 ce fd 90 <0f> 0b e8 b7 76 6b fe 48 c7 c7 40 fd ea 8b e8 fb a0 ce fd 48 c7 c7