syzbot

watchdog: BUG: soft lockup - CPU#0 stuck for 23s! [syz-executor.0:11479]
Modules linked in:
irq event stamp: 2706
hardirqs last  enabled at (2705): [<ffff80001440fd38>] exit_to_kernel_mode+0x38/0x230 arch/arm64/kernel/entry-common.c:63
hardirqs last disabled at (2706): [<ffff800014410400>] enter_el1_irq_or_nmi+0x10/0x20 arch/arm64/kernel/entry-common.c:105
softirqs last  enabled at (2600): [<ffff8000100109e0>] _stext+0x9e0/0x1084
softirqs last disabled at (2435): [<ffff80001015ced4>] do_softirq_own_stack include/asm-generic/softirq_stack.h:10 [inline]
softirqs last disabled at (2435): [<ffff80001015ced4>] invoke_softirq kernel/softirq.c:440 [inline]
softirqs last disabled at (2435): [<ffff80001015ced4>] __irq_exit_rcu+0x494/0x550 kernel/softirq.c:637
CPU: 0 PID: 11479 Comm: syz-executor.0 Not tainted 5.12.0-syzkaller-08136-gd72cd4ad4174 #0
Hardware name: linux,dummy-virt (DT)
pstate: 00000005 (nzcv daif -PAN -UAO -TCO BTYPE=--)
pc : clear_page+0x14/0x28 arch/arm64/lib/clear_page.S:23
lr : clear_highpage include/linux/highmem.h:203 [inline]
lr : kernel_init_free_pages+0x74/0x180 mm/page_alloc.c:1212
sp : ffff80001a9474a0
x29: ffff80001a9474a0 x28: fffffc0000181f00 
x27: ffff00007fc13ec0 x26: ffff000011f614c0 
x25: ffff6000023ec298 x24: 00000000000014c0 
x23: ffff000011f60000 x22: fffffc0000181f40 
x21: ffff800015534d28 x20: dfff800000000000 
x19: fffffc0000181f00 x18: 0000000000000000 
x17: 0000000000000000 x16: 0000000000000000 
x15: 0000000000000000 x14: 1ffff00003528e5e 
x13: 0000000000000001 x12: ffff7f80000303e7 
x11: 1fffff80000303e6 x10: ffff7f80000303e6 
x9 : 0000000000000000 x8 : ffff600000c0fa00 
x7 : 0000000000000000 x6 : 000000000000003f 
x5 : 0000000000000040 x4 : 1ffff00002fb1938 
x3 : 1fffe000023ec001 x2 : 0000000000000004 
x1 : 0000000000000040 x0 : ffff00000607cd80 
Call trace:
 clear_page+0x14/0x28 arch/arm64/lib/clear_page.S:21
 post_alloc_hook+0x104/0x1fc mm/page_alloc.c:2305
 prep_new_page mm/page_alloc.c:2311 [inline]
 get_page_from_freelist+0x201c/0x2a40 mm/page_alloc.c:3951
 __alloc_pages_nodemask+0x2a0/0x24dc mm/page_alloc.c:5001
 alloc_pages_vma+0xb4/0x510 mm/mempolicy.c:2240
 wp_page_copy+0x198/0x16e0 mm/memory.c:2853
 do_wp_page+0x1d8/0xbbc mm/memory.c:3160
 handle_pte_fault mm/memory.c:4336 [inline]
 __handle_mm_fault+0x1020/0x21d4 mm/memory.c:4453
 handle_mm_fault+0x1cc/0x4dc mm/memory.c:4551
 __do_page_fault arch/arm64/mm/fault.c:507 [inline]
 do_page_fault+0x230/0x8c0 arch/arm64/mm/fault.c:607
 do_mem_abort+0x64/0x1c0 arch/arm64/mm/fault.c:821
 el0_da+0x3c/0x50 arch/arm64/kernel/entry-common.c:314
 el0_sync_handler+0x168/0x1b0 arch/arm64/kernel/entry-common.c:441
 el0_sync+0x18c/0x1c0 arch/arm64/kernel/entry.S:743