------------[ cut here ]------------
WARNING: CPU: 0 PID: 4996 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: 0 UID: 0 PID: 4996 Comm: syz.1.337 Not tainted 6.12.0-syzkaller #0
Hardware name: ARM-Versatile Express
Call trace: 
[<819b7fb8>] (dump_backtrace) from [<819b80b4>] (show_stack+0x18/0x1c arch/arm/kernel/traps.c:257)
 r7:00000000 r6:82623304 r5:00000000 r4:820413b8
[<819b809c>] (show_stack) from [<819d60dc>] (__dump_stack lib/dump_stack.c:94 [inline])
[<819b809c>] (show_stack) from [<819d60dc>] (dump_stack_lvl+0x54/0x7c lib/dump_stack.c:120)
[<819d6088>] (dump_stack_lvl) from [<819d611c>] (dump_stack+0x18/0x1c lib/dump_stack.c:129)
 r5:00000000 r4:82874d18
[<819d6104>] (dump_stack) from [<819b8be0>] (panic+0x120/0x374 kernel/panic.c:354)
[<819b8ac0>] (panic) from [<802426d0>] (check_panic_on_warn kernel/panic.c:243 [inline])
[<819b8ac0>] (panic) from [<802426d0>] (get_taint+0x0/0x1c kernel/panic.c:238)
 r3:8260c604 r2:00000001 r1:82029878 r0:82031344
 r7:80492e7c
[<8024265c>] (check_panic_on_warn) from [<80242834>] (__warn+0x80/0x188 kernel/panic.c:748)
[<802427b4>] (__warn) from [<80242ab4>] (warn_slowpath_fmt+0x178/0x1f4 kernel/panic.c:775)
 r8:00000009 r7:82059090 r6:df95dd24 r5:84f03c00 r4:00000000
[<80242940>] (warn_slowpath_fmt) from [<80492e7c>] (kunmap_local_indexed+0x20c/0x224 mm/highmem.c:622)
 r10:ffefdfe8 r9:83f92400 r8:20000000 r7:00000000 r6:00000003 r5:84f03c00
 r4:ffefd000
[<80492c70>] (kunmap_local_indexed) from [<8050cd58>] (__kunmap_local include/linux/highmem-internal.h:94 [inline])
[<80492c70>] (kunmap_local_indexed) from [<8050cd58>] (move_pages_pte mm/userfaultfd.c:1329 [inline])
[<80492c70>] (kunmap_local_indexed) from [<8050cd58>] (move_pages+0x7e8/0x149c mm/userfaultfd.c:1730)
 r7:00000000 r6:84790300 r5:dee6ad44 r4:ffefb000
[<8050c570>] (move_pages) from [<8058b378>] (userfaultfd_move fs/userfaultfd.c:1899 [inline])
[<8050c570>] (move_pages) from [<8058b378>] (userfaultfd_ioctl+0x111c/0x2080 fs/userfaultfd.c:2022)
 r10:83f92400 r9:df95de98 r8:00000001 r7:21000000 r6:00000000 r5:20000040
 r4:8514c000
[<8058a25c>] (userfaultfd_ioctl) from [<80536ea8>] (vfs_ioctl fs/ioctl.c:51 [inline])
[<8058a25c>] (userfaultfd_ioctl) from [<80536ea8>] (do_vfs_ioctl fs/ioctl.c:860 [inline])
[<8058a25c>] (userfaultfd_ioctl) from [<80536ea8>] (__do_sys_ioctl fs/ioctl.c:904 [inline])
[<8058a25c>] (userfaultfd_ioctl) from [<80536ea8>] (sys_ioctl+0x138/0xd88 fs/ioctl.c:892)
 r10:84f03c00 r9:00000003 r8:845e73c0 r7:20000040 r6:845e73c1 r5:00000000
 r4:c028aa05
[<80536d70>] (sys_ioctl) from [<80200060>] (ret_fast_syscall+0x0/0x1c arch/arm/mm/proc-v7.S:67)
Exception stack(0xdf95dfa8 to 0xdf95dff0)
dfa0:                   00000000 00000000 00000003 c028aa05 20000040 00000000
dfc0: 00000000 00000000 002862f0 00000036 00000000 00006364 003d0f00 76be90bc
dfe0: 76be8ec0 76be8eb0 00018af0 00133450
 r10:00000036 r9:84f03c00 r8:8020029c r7:00000036 r6:002862f0 r5:00000000
 r4:00000000
Rebooting in 86400 seconds..