------------[ cut here ]------------
UBSAN: shift-out-of-bounds in lib/xarray.c:147:16
shift exponent 128 is too large for 64-bit type 'unsigned long'
CPU: 0 UID: 0 PID: 82 Comm: kswapd1 Not tainted 6.14.0-rc6-syzkaller #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:94 [inline]
 dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120
 ubsan_epilogue lib/ubsan.c:231 [inline]
 __ubsan_handle_shift_out_of_bounds+0x3c8/0x420 lib/ubsan.c:468
 get_offset lib/xarray.c:147 [inline]
 xas_descend lib/xarray.c:207 [inline]
 xas_create+0x1832/0x1ae0 lib/xarray.c:695
 xas_store+0x96/0x1870 lib/xarray.c:794
 __xa_store+0x1e0/0x380 lib/xarray.c:1570
 xa_store+0x34/0x50 lib/xarray.c:1601
 zswap_store_page mm/zswap.c:1465 [inline]
 zswap_store+0x1024/0x1c20 mm/zswap.c:1571
 swap_writepage+0x647/0xce0 mm/page_io.c:278
 pageout mm/vmscan.c:696 [inline]
 shrink_folio_list+0x35c2/0x5ac0 mm/vmscan.c:1402
 evict_folios+0x45fd/0x56a0 mm/vmscan.c:4660
 try_to_shrink_lruvec+0x713/0x9b0 mm/vmscan.c:4821
 shrink_one+0x3b9/0x850 mm/vmscan.c:4866
 shrink_many mm/vmscan.c:4929 [inline]
 lru_gen_shrink_node mm/vmscan.c:5007 [inline]
 shrink_node+0x379b/0x3e20 mm/vmscan.c:5978
 kswapd_shrink_node mm/vmscan.c:6807 [inline]
 balance_pgdat mm/vmscan.c:6999 [inline]
 kswapd+0x20f3/0x3b10 mm/vmscan.c:7264
 kthread+0x7a9/0x920 kernel/kthread.c:464
 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:148
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>
---[ end trace ]---