------------[ cut here ]------------
[  312.656055] WARNING: mm/highmem.c:662 at __kmap_local_sched_out+0x144/0x150, CPU#1: cow/1767
[  312.656367] Modules linked in: nfnetlink ip_tables x_tables
[  312.656592] CPU: 1 UID: 0 PID: 1767 Comm: cow Tainted: G      D W           6.16.0-rc2-next-20250619 #1 NONE 
[  312.657103] Tainted: [D]=DIE, [W]=WARN
[  312.657306] Hardware name: Generic DT based system
[  312.657425] Call trace: 
[  312.657439]  unwind_backtrace from show_stack+0x10/0x14
[  312.657773]  show_stack from dump_stack_lvl+0x50/0x5c
[  312.658006]  dump_stack_lvl from __warn+0xf0/0x1f8
[  312.658079]  __warn from warn_slowpath_fmt+0xa8/0x174
[  312.658203]  warn_slowpath_fmt from __kmap_local_sched_out+0x144/0x150
[  312.658539]  __kmap_local_sched_out from __schedule+0x7ec/0x880
[  312.658655]  __schedule from schedule+0x7c/0x114
[  312.658744]  schedule from schedule_preempt_disabled+0xc/0x10
[  312.659041]  schedule_preempt_disabled from rwsem_down_read_slowpath+0x234/0x448
[  312.659345]  rwsem_down_read_slowpath from down_read+0x9c/0xf4
[  312.660245]  down_read from do_exit+0x1c0/0x8b8
[  312.660371]  do_exit from make_task_dead+0x9c/0x134
[  312.660451]  make_task_dead from die+0x1b4/0x1cc
[  312.660529]  die from __und_svc_finish+0x0/0x30
[  312.660598] Exception stack(0xf9d6dcf8 to 0xf9d6dd40)
[  312.660672] dce0:                                                       7fedf71f 00c00000
[  312.660787] dd00: effff770 c0203000 c4049bc0 0007fadf 0000071f ffeee000 00c00000 c22112fc
[  312.660893] dd20: 7fadf003 00000000 80000000 f9d6dd48 c068d2c8 c068d420 000a0113 ffffffff
[  312.661081]  __und_svc_finish from __kmap_local_pfn_prot+0x170/0x174
[  312.661177]  __kmap_local_pfn_prot from __pte_offset_map_lock+0x60/0xfc
[  312.661273]  __pte_offset_map_lock from move_page_tables+0x4c0/0x91c
[  312.661366]  move_page_tables from move_vma+0x324/0x890
[  312.661445]  move_vma from sys_mremap+0x410/0x750
[  312.661517]  sys_mremap from ret_fast_syscall+0x0/0x5c
[  312.661592] Exception stack(0xf9d6dfa8 to 0xf9d6dff0)
[  312.661666] dfa0:                   b6c70000 00000007 b6d40000 00040000 00040000 0000000b
[  312.663470] dfc0: b6c70000 00000007 b6cb0000 000000a3 00447614 00100000 b6c70000 00080000
[  312.663939] dfe0: bedf7760 bedf7750 0044a314 b6e632e2
[  312.664265] ---[ end trace 0000000000000000 ]---