BUG at fs/jfs/jfs_txnmgr.c:662 assert(last)
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kernel BUG at fs/jfs/jfs_txnmgr.c:662!
Internal error: Oops - BUG: 00000000f2000800 [#1]  SMP
Modules linked in:
CPU: 1 UID: 0 PID: 8590 Comm: syz.6.339 Not tainted syzkaller #0 PREEMPT 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/03/2025
pstate: 63400005 (nZCv daif +PAN -UAO +TCO +DIT -SSBS BTYPE=--)
pc : txLock+0x1604/0x17a8 fs/jfs/jfs_txnmgr.c:662
lr : txLock+0x1604/0x17a8 fs/jfs/jfs_txnmgr.c:662
sp : ffff80009ea96e40
x29: ffff80009ea96e60 x28: 1ffff000136c4800 x27: 0000000000000048
x26: 0000000000000000 x25: 0000000000000000 x24: 0000000000000006
x23: ffff80009b624000 x22: ffff80009b624000 x21: 0000000000000002
x20: ffff80009b6241b0 x19: dfff800000000000 x18: 00000000ffffffff
x17: 0000072c00000001 x16: ffff800082debb40 x15: 0000000000000001
x14: 1ffff00013d52d44 x13: 0000000000000000 x12: 0000000000000000
x11: 0000000000080000 x10: 000000000000ef7c x9 : d7b93b2d2808ce00
x8 : d7b93b2d2808ce00 x7 : ffff8000805653c0 x6 : 0000000000000000
x5 : 0000000000000000 x4 : 0000000000000000 x3 : ffff8000807d6834
x2 : 0000000000000001 x1 : 0000000100000000 x0 : 000000000000002b
Call trace:
 txLock+0x1604/0x17a8 fs/jfs/jfs_txnmgr.c:662 (P)
 diWrite+0x368/0x18d4 fs/jfs/jfs_imap.c:654
 txCommit+0x5d0/0x3e00 fs/jfs/jfs_txnmgr.c:1256
 jfs_commit_inode+0x274/0x498 fs/jfs/inode.c:114
 extAlloc+0xa10/0xdc8 fs/jfs/jfs_extent.c:177
 jfs_get_block+0x2bc/0x8b8 fs/jfs/inode.c:254
 __block_write_begin_int+0x53c/0x15e8 fs/buffer.c:2145
 block_write_begin+0xa0/0x128 fs/buffer.c:2256
 jfs_write_begin+0x44/0x88 fs/jfs/inode.c:306
 generic_perform_write+0x244/0x7bc mm/filemap.c:4242
 __generic_file_write_iter+0xfc/0x204 mm/filemap.c:4359
 generic_file_write_iter+0x10c/0x47c mm/filemap.c:4385
 new_sync_write fs/read_write.c:593 [inline]
 vfs_write+0x540/0xa3c fs/read_write.c:686
 ksys_write+0x120/0x210 fs/read_write.c:738
 __do_sys_write fs/read_write.c:749 [inline]
 __se_sys_write fs/read_write.c:746 [inline]
 __arm64_sys_write+0x7c/0x90 fs/read_write.c:746
 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline]
 invoke_syscall+0x98/0x254 arch/arm64/kernel/syscall.c:49
 el0_svc_common+0xe8/0x23c arch/arm64/kernel/syscall.c:132
 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151
 el0_svc+0x5c/0x254 arch/arm64/kernel/entry-common.c:724
 el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:743
 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596
Code: b004b063 911b8063 528052c2 9792dea4 (d4210000) 
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