------------[ cut here ]------------
WARNING: ./arch/arm64/include/asm/io.h:283 at rcu_read_unlock include/linux/rcupdate.h:878 [inline], CPU#0: syz.2.18/3700
WARNING: ./arch/arm64/include/asm/io.h:283 at pte_unmap include/linux/pgtable.h:117 [inline], CPU#0: syz.2.18/3700
WARNING: ./arch/arm64/include/asm/io.h:283 at follow_pfnmap_end mm/memory.c:7077 [inline], CPU#0: syz.2.18/3700
WARNING: ./arch/arm64/include/asm/io.h:283 at generic_access_phys+0x26c/0x344 mm/memory.c:7126, CPU#0: syz.2.18/3700
Modules linked in:
CPU: 0 UID: 0 PID: 3700 Comm: syz.2.18 Tainted: G        W           syzkaller #0 PREEMPT 
Tainted: [W]=WARN
Hardware name: linux,dummy-virt (DT)
pstate: 20000005 (nzCv daif -PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : ioremap_prot arch/arm64/include/asm/io.h:283 [inline]
pc : generic_access_phys+0x26c/0x344 mm/memory.c:7116
lr : rcu_read_unlock include/linux/rcupdate.h:882 [inline]
lr : pte_unmap include/linux/pgtable.h:117 [inline]
lr : follow_pfnmap_end mm/memory.c:7077 [inline]
lr : generic_access_phys+0xcc/0x344 mm/memory.c:7111
sp : ffff8000a1e67830
x29: ffff8000a1e678f0 x28: ffff8000a1e67870 x27: 0000000000000000
x26: 0000000000000001 x25: ffff700010ef8fd0 x24: 0000000000001000
x23: ffff8000877c7e80 x22: 0000000000000000 x21: 0160000000000f92
x20: ffff00001ec25c80 x19: 0000000010042000 x18: 0000000000000000
x17: ffff800080c267fc x16: ffff800080e49be0 x15: ffff800080e496d8
x14: ffff800080a8ead0 x13: ffff800089e66530 x12: ffff600003f695e1
x11: 1fffe00003f695e0 x10: ffff600003f695e0 x9 : dfff800000000000
x8 : ffff00001fb4af00 x7 : 0000000000000001 x6 : ffff600003f695e0
x5 : ffff00001fb4af00 x4 : 0000000000000000 x3 : 1fffe00002f057d0
x2 : 0000000000000000 x1 : 0000000000001000 x0 : 000000003fffffff
Call trace:
 rcu_read_unlock include/linux/rcupdate.h:878 [inline] (P)
 pte_unmap include/linux/pgtable.h:117 [inline] (P)
 follow_pfnmap_end mm/memory.c:7077 [inline] (P)
 generic_access_phys+0x26c/0x344 mm/memory.c:7126 (P)
 kernfs_vma_access+0x14c/0x1f0 fs/kernfs/file.c:437
 __access_remote_vm+0x3dc/0x600 mm/memory.c:7194
 access_remote_vm+0x10/0x20 mm/memory.c:7241
 mem_rw+0x16c/0x580 fs/proc/base.c:912
 mem_read+0x14/0x20 fs/proc/base.c:940
 vfs_read+0x190/0xa18 fs/read_write.c:572
 ksys_read+0xf0/0x1e0 fs/read_write.c:716
 __do_sys_read fs/read_write.c:725 [inline]
 __se_sys_read fs/read_write.c:723 [inline]
 __arm64_sys_read+0x70/0xa0 fs/read_write.c:723
 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline]
 invoke_syscall+0x74/0x240 arch/arm64/kernel/syscall.c:49
 el0_svc_common.constprop.0+0xac/0x230 arch/arm64/kernel/syscall.c:121
 do_el0_svc_compat+0x40/0x58 arch/arm64/kernel/syscall.c:146
 el0_svc_compat+0x54/0x264 arch/arm64/kernel/entry-common.c:909
 el0t_32_sync_handler+0x88/0xac arch/arm64/kernel/entry-common.c:927
 el0t_32_sync+0x19c/0x1a0 arch/arm64/kernel/entry.S:595
irq event stamp: 2032
hardirqs last  enabled at (2031): [<ffff8000859a8084>] irqentry_exit_to_kernel_mode_after_preempt include/linux/irq-entry-common.h:507 [inline]
hardirqs last  enabled at (2031): [<ffff8000859a8084>] __arm64_exit_to_kernel_mode+0x38/0x98 arch/arm64/kernel/entry-common.c:60
hardirqs last disabled at (2032): [<ffff8000859a81d0>] el1_brk64+0x20/0x54 arch/arm64/kernel/entry-common.c:445
softirqs last  enabled at (1996): [<ffff80008023b5b8>] softirq_handle_end kernel/softirq.c:491 [inline]
softirqs last  enabled at (1996): [<ffff80008023b5b8>] handle_softirqs+0xa98/0x1048 kernel/softirq.c:673
softirqs last disabled at (1977): [<ffff8000800103d4>] __do_softirq+0x14/0x20 kernel/softirq.c:679
---[ end trace 0000000000000000 ]---