BUG at fs[  145.796279][ T6188] 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 PTI
CPU: 0 UID: 0 PID: 6188 Comm: syz.4.59 Not tainted syzkaller #0 PREEMPT_{RT,(full)} 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026
RIP: 0010:txLock+0x1b92/0x1cc0 fs/jfs/jfs_txnmgr.c:663
Code: e9 6a f8 ff ff e8 7e 60 6b fe 48 c7 c7 60 8d 8b 8b 48 c7 c6 59 89 8b 8b ba 97 02 00 00 48 c7 c1 80 8e 8b 8b e8 8f 46 ce fd 90 <0f> 0b e8 57 60 6b fe 48 c7 c7 40 8f 8b 8b e8 7b 46 ce fd 48 c7 c7
RSP: 0018:ffffc900070c6e60 EFLAGS: 00010246
RAX: 000000000000002b RBX: 0000000000000000 RCX: 2404671d157a2a00
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc900070c6f88 R08: 0000000000000000 R09: 0000000000000000
R10: dffffc0000000000 R11: fffff52000e18d7d R12: 1ffff92000672400
R13: ffffc90003392000 R14: 0000000000000000 R15: 0000000000000000
FS:  00007f73ff5966c0(0000) GS:ffff888126187000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b33517ff8 CR3: 0000000021b62000 CR4: 00000000003526f0
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+0x2af/0x8b0 mm/filemap.c:4325
 generic_file_write_iter+0x14b/0x690 mm/filemap.c:4468
 do_iter_readv_writev+0x62b/0x8d0 fs/read_write.c:-1
 vfs_writev+0x345/0x9a0 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+0x187/0x2b0 fs/read_write.c:1204
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x174/0x580 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f740133ce59
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:00007f73ff596028 EFLAGS: 00000246 ORIG_RAX: 0000000000000148
RAX: ffffffffffffffda RBX: 00007f74015b5fa0 RCX: 00007f740133ce59
RDX: 0000000000000001 RSI: 00002000000001c0 RDI: 0000000000000007
RBP: 00007f74013d2d6f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000e7b R11: 0000000000000246 R12: 0000000000000000
R13: 00007f74015b6038 R14: 00007f74015b5fa0 R15: 00007ffeb6bdd648
 </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 7e 60 6b fe 48 c7 c7 60 8d 8b 8b 48 c7 c6 59 89 8b 8b ba 97 02 00 00 48 c7 c1 80 8e 8b 8b e8 8f 46 ce fd 90 <0f> 0b e8 57 60 6b fe 48 c7 c7 40 8f 8b 8b e8 7b 46 ce fd 48 c7 c7
RSP: 0018:ffffc900070c6e60 EFLAGS: 00010246
RAX: 000000000000002b RBX: 0000000000000000 RCX: 2404671d157a2a00
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc900070c6f88 R08: 0000000000000000 R09: 0000000000000000
R10: dffffc0000000000 R11: fffff52000e18d7d R12: 1ffff92000672400
R13: ffffc90003392000 R14: 0000000000000000 R15: 0000000000000000
FS:  00007f73ff5966c0(0000) GS:ffff888126187000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f769e141000 CR3: 0000000021b62000 CR4: 00000000003526f0