BUG at fs/jfs/jfs_txnmgr.c:663 assert(last)
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kernel BUG at fs/jfs/jfs_txnmgr.c:663!
Oops: invalid opcode: 0000 [#1] SMP KASAN NOPTI
CPU: 0 UID: 0 PID: 5337 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:663
Code: e9 6a f8 ff ff e8 5e a2 61 fe 48 c7 c7 a0 1f 0c 8c 48 c7 c6 99 1b 0c 8c ba 97 02 00 00 48 c7 c1 c0 20 0c 8c e8 8f 8a c3 fd 90 <0f> 0b e8 37 a2 61 fe 48 c7 c7 80 21 0c 8c e8 7b 8a c3 fd 48 c7 c7
RSP: 0018:ffffc9000f775e40 EFLAGS: 00010246
RAX: 000000000000002b RBX: 0000000000000000 RCX: a7b1325c2ca85000
RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000
RBP: ffffc9000f775f68 R08: ffffc9000f775bc7 R09: 1ffff92001eeeb78
R10: dffffc0000000000 R11: fffff52001eeeb79 R12: 1ffff92000202c00
R13: ffffc90001016000 R14: 0000000000000000 R15: 0000000000000000
FS:  00007f56215246c0(0000) GS:ffff88808c87b000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f56204f5a00 CR3: 0000000043817000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 diWrite+0x444/0x1f40 fs/jfs/jfs_imap.c:654
 txCommit+0x869/0x5410 fs/jfs/jfs_txnmgr.c:1257
 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:2042
 block_write_begin+0x8d/0x120 fs/buffer.c:2153
 jfs_write_begin+0x35/0x80 fs/jfs/inode.c:306
 generic_perform_write+0x2e2/0x8f0 mm/filemap.c:4325
 generic_file_write_iter+0x14a/0x680 mm/filemap.c:4468
 __kernel_write_iter+0x41e/0x880 fs/read_write.c:621
 dump_emit_page fs/coredump.c:1304 [inline]
 dump_user_range+0xc19/0x12c0 fs/coredump.c:1378
 elf_core_dump+0x34c2/0x3ad0 fs/binfmt_elf.c:2109
 coredump_write+0x1216/0x1910 fs/coredump.c:1053
 do_coredump fs/coredump.c:1132 [inline]
 vfs_coredump+0x3807/0x4530 fs/coredump.c:1206
 get_signal+0x1107/0x1330 kernel/signal.c:3022
 arch_do_signal_or_restart+0xbc/0x840 arch/x86/kernel/signal.c:337
 __exit_to_user_mode_loop kernel/entry/common.c:64 [inline]
 exit_to_user_mode_loop kernel/entry/common.c:98 [inline]
 __exit_to_user_mode_prepare include/linux/irq-entry-common.h:207 [inline]
 irqentry_exit_to_user_mode_prepare include/linux/irq-entry-common.h:244 [inline]
 irqentry_exit_to_user_mode include/linux/irq-entry-common.h:315 [inline]
 irqentry_exit+0x289/0x760 kernel/entry/common.c:162
 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:618
RIP: 0033:0xb08918ce
Code: Unable to access opcode bytes at 0xb08918a4.
RSP: 002b:0000200000000688 EFLAGS: 00010217
RAX: 0000000000000000 RBX: 00007f5620815fa0 RCX: 00007f562059ce59
RDX: 00002000000006c0 RSI: 0000200000000680 RDI: 0000000002001000
RBP: 00007f5620632d6f R08: 0000200000000740 R09: 0000200000000740
R10: 0000200000000700 R11: 0000000000000206 R12: 0000000000000000
R13: 00007f5620816038 R14: 00007f5620815fa0 R15: 00007fffe7191778
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:txLock+0x1b92/0x1cc0 fs/jfs/jfs_txnmgr.c:663
Code: e9 6a f8 ff ff e8 5e a2 61 fe 48 c7 c7 a0 1f 0c 8c 48 c7 c6 99 1b 0c 8c ba 97 02 00 00 48 c7 c1 c0 20 0c 8c e8 8f 8a c3 fd 90 <0f> 0b e8 37 a2 61 fe 48 c7 c7 80 21 0c 8c e8 7b 8a c3 fd 48 c7 c7
RSP: 0018:ffffc9000f775e40 EFLAGS: 00010246
RAX: 000000000000002b RBX: 0000000000000000 RCX: a7b1325c2ca85000
RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000
RBP: ffffc9000f775f68 R08: ffffc9000f775bc7 R09: 1ffff92001eeeb78
R10: dffffc0000000000 R11: fffff52001eeeb79 R12: 1ffff92000202c00
R13: ffffc90001016000 R14: 0000000000000000 R15: 0000000000000000
FS:  00007f56215246c0(0000) GS:ffff88808c87b000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000b08918a4 CR3: 0000000043817000 CR4: 0000000000352ef0