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WARNING: CPU: 1 PID: 21861 at mm/highmem.c:622 kunmap_local_indexed+0x20c/
WARNING: CPU: 1 PID: 21861 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: 21861 Comm: syz.1.4350 Not tainted syzkaller #0 PREEMPT 
Hardware name: ARM-Versatile Express
Call trace: 
[<80201a24>] (dump_backtrace) from [<80201b20>] (show_stack+0x18/0x1c arch/arm/kernel/traps.c:257)
 r7:00000000 r6:8281f77c r5:00000000 r4:822603d4
[<80201b08>] (show_stack) from [<8021fb74>] (__dump_stack lib/dump_stack.c:94 [inline])
[<80201b08>] (show_stack) from [<8021fb74>] (dump_stack_lvl+0x54/0x7c lib/dump_stack.c:120)
[<8021fb20>] (dump_stack_lvl) from [<8021fbb4>] (dump_stack+0x18/0x1c lib/dump_stack.c:129)
 r5:00000000 r4:82a77d18
[<8021fb9c>] (dump_stack) from [<80202624>] (vpanic+0x10c/0x30c kernel/panic.c:430)
[<80202518>] (vpanic) from [<80202858>] (trace_suspend_resume+0x0/0xd8 kernel/panic.c:566)
 r7:804bec80
[<80202824>] (panic) from [<80254960>] (check_panic_on_warn kernel/panic.c:323 [inline])
[<80202824>] (panic) from [<80254960>] (get_taint+0x0/0x1c kernel/panic.c:318)
 r3:8280c684 r2:00000001 r1:82246df0 r0:8224e86c
[<802548e8>] (check_panic_on_warn) from [<80254ac4>] (__warn+0x80/0x188 kernel/panic.c:837)
[<80254a44>] (__warn) from [<80254d44>] (warn_slowpath_fmt+0x178/0x1f4 kernel/panic.c:864)
 r8:00000009 r7:8227ac18 r6:e04f1d14 r5:842b0000 r4:00000000
[<80254bd0>] (warn_slowpath_fmt) from [<804bec80>] (kunmap_local_indexed+0x20c/0x224 mm/highmem.c:622)
 r10:00000000 r9:00000000 r8:849b1818 r7:00000000 r6:00000003 r5:842b0000
 r4:ffedc000
[<804bea74>] (kunmap_local_indexed) from [<8053b464>] (__kunmap_local include/linux/highmem-internal.h:102 [inline])
[<804bea74>] (kunmap_local_indexed) from [<8053b464>] (move_pages_pte mm/userfaultfd.c:1457 [inline])
[<804bea74>] (kunmap_local_indexed) from [<8053b464>] (move_pages+0xb1c/0x1a00 mm/userfaultfd.c:1863)
 r7:00000000 r6:00000000 r5:849b1800 r4:ffeda758
[<8053a948>] (move_pages) from [<805c4abc>] (userfaultfd_move fs/userfaultfd.c:1923 [inline])
[<8053a948>] (move_pages) from [<805c4abc>] (userfaultfd_ioctl+0x1254/0x2408 fs/userfaultfd.c:2046)
 r10:857b7740 r9:e04f1e98 r8:00000001 r7:2018c000 r6:00000000 r5:20000040
 r4:85b63280
[<805c3868>] (userfaultfd_ioctl) from [<8056cd68>] (vfs_ioctl fs/ioctl.c:51 [inline])
[<805c3868>] (userfaultfd_ioctl) from [<8056cd68>] (do_vfs_ioctl fs/ioctl.c:552 [inline])
[<805c3868>] (userfaultfd_ioctl) from [<8056cd68>] (__do_sys_ioctl fs/ioctl.c:596 [inline])
[<805c3868>] (userfaultfd_ioctl) from [<8056cd68>] (sys_ioctl+0x130/0xba0 fs/ioctl.c:584)
 r10:842b0000 r9:00000003 r8:85a700c0 r7:20000040 r6:85a700c1 r5:00000000
 r4:c028aa05
[<8056cc38>] (sys_ioctl) from [<80200060>] (ret_fast_syscall+0x0/0x1c arch/arm/mm/proc-v7.S:67)
Exception stack(0xe04f1fa8 to 0xe04f1ff0)
1fa0:                   00000000 00000000 00000003 c028aa05 20000040 00000000
1fc0: 00000000 00000000 002f6308 00000036 002e0000 00000000 00006364 76fa50bc
1fe0: 76fa4ec0 76fa4eb0 0001948c 001322c0
 r10:00000036 r9:842b0000 r8:8020029c r7:00000036 r6:002f6308 r5:00000000
 r4:00000000
Rebooting in 86400 seconds..