------------[ cut here ]------------
WARNING: CPU: 1 PID: 22015 at mm/highmem.c:622 kunmap_local_indexed+0x20c/0x224 mm/highmem.c:622
Modules linked in:
Kernel panic - not syncing: kernel: panic_on_warn set ...
CPU: 1 UID: 0 PID: 22015 Comm: syz.1.4413 Not tainted 6.12.0-rc2-syzkaller #0
Hardware name: ARM-Versatile Express
Call trace: 
[<81999178>] (dump_backtrace) from [<81999274>] (show_stack+0x18/0x1c arch/arm/kernel/traps.c:257)
 r7:00000000 r6:82622f44 r5:00000000 r4:8203d408
[<8199925c>] (show_stack) from [<819b7704>] (__dump_stack lib/dump_stack.c:94 [inline])
[<8199925c>] (show_stack) from [<819b7704>] (dump_stack_lvl+0x54/0x7c lib/dump_stack.c:120)
[<819b76b0>] (dump_stack_lvl) from [<819b7744>] (dump_stack+0x18/0x1c lib/dump_stack.c:129)
 r5:00000000 r4:82870d18
[<819b772c>] (dump_stack) from [<81999da0>] (panic+0x120/0x374 kernel/panic.c:354)
[<81999c80>] (panic) from [<802420e0>] (check_panic_on_warn kernel/panic.c:243 [inline])
[<81999c80>] (panic) from [<802420e0>] (get_taint+0x0/0x1c kernel/panic.c:238)
 r3:8260c5c4 r2:00000001 r1:820257e8 r0:8202d250
 r7:8048c64c
[<8024206c>] (check_panic_on_warn) from [<80242244>] (__warn+0x80/0x188 kernel/panic.c:748)
[<802421c4>] (__warn) from [<802424c4>] (warn_slowpath_fmt+0x178/0x1f4 kernel/panic.c:775)
 r8:00000009 r7:82054e4c r6:df979d24 r5:857ac800 r4:00000000
[<80242350>] (warn_slowpath_fmt) from [<8048c64c>] (kunmap_local_indexed+0x20c/0x224 mm/highmem.c:622)
 r10:ffedcfe8 r9:83d9a100 r8:20000000 r7:00000000 r6:00000003 r5:857ac800
 r4:ffedc000
[<8048c440>] (kunmap_local_indexed) from [<80505a70>] (__kunmap_local include/linux/highmem-internal.h:94 [inline])
[<8048c440>] (kunmap_local_indexed) from [<80505a70>] (move_pages_pte mm/userfaultfd.c:1329 [inline])
[<8048c440>] (kunmap_local_indexed) from [<80505a70>] (move_pages+0x7e8/0x149c mm/userfaultfd.c:1730)
 r7:00000000 r6:8602d3c0 r5:def87e04 r4:ffeda000
[<80505288>] (move_pages) from [<80581cb0>] (userfaultfd_move fs/userfaultfd.c:1871 [inline])
[<80505288>] (move_pages) from [<80581cb0>] (userfaultfd_ioctl+0x114c/0x2080 fs/userfaultfd.c:1994)
 r10:83d9a100 r9:df979e98 r8:00000001 r7:21000000 r6:00000000 r5:20000040
 r4:85222000
[<80580b64>] (userfaultfd_ioctl) from [<8052f67c>] (vfs_ioctl fs/ioctl.c:51 [inline])
[<80580b64>] (userfaultfd_ioctl) from [<8052f67c>] (__do_sys_ioctl fs/ioctl.c:907 [inline])
[<80580b64>] (userfaultfd_ioctl) from [<8052f67c>] (sys_ioctl+0x134/0xda8 fs/ioctl.c:893)
 r10:857ac800 r9:85d54c00 r8:00000003 r7:20000040 r6:85d54c01 r5:00000000
 r4:c028aa05
[<8052f548>] (sys_ioctl) from [<80200060>] (ret_fast_syscall+0x0/0x1c arch/arm/mm/proc-v7.S:67)
Exception stack(0xdf979fa8 to 0xdf979ff0)
9fa0:                   00000000 00000000 00000003 c028aa05 20000040 00000000
9fc0: 00000000 00000000 002862f0 00000036 00000000 00006364 003d0f00 76b420bc
9fe0: 76b41ec0 76b41eb0 00018af8 00132ec0
 r10:00000036 r9:857ac800 r8:8020029c r7:00000036 r6:002862f0 r5:00000000
 r4:00000000
Rebooting in 86400 seconds..