watchdog: BUG: soft lockup - CPU#0 stuck for 23s! [syz-executor.0:20240] Modules linked in: irq event stamp: 1536 hardirqs last enabled at (1535): [] exit_to_kernel_mode+0x38/0x230 arch/arm64/kernel/entry-common.c:71 hardirqs last disabled at (1536): [] enter_el1_irq_or_nmi+0x10/0x20 arch/arm64/kernel/entry-common.c:113 softirqs last enabled at (1494): [] _stext+0x9a4/0x1050 softirqs last disabled at (1367): [] do_softirq_own_stack include/asm-generic/softirq_stack.h:10 [inline] softirqs last disabled at (1367): [] invoke_softirq kernel/softirq.c:439 [inline] softirqs last disabled at (1367): [] __irq_exit_rcu+0x470/0x520 kernel/softirq.c:636 CPU: 0 PID: 20240 Comm: syz-executor.0 Not tainted 5.14.0-rc6-syzkaller-00110-gf87d64319e6f #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:184 [inline] lr : kernel_init_free_pages.part.0+0x6c/0x17c mm/page_alloc.c:1286 sp : ffff80001ad97490 x29: ffff80001ad97490 x28: 0000000000000000 x27: ffff00007fc11ec0 x26: ffff0000110e94b8 x25: ffff60000221d297 x24: 00000000000014b8 x23: ffff0000110e8000 x22: fffffc0000171340 x21: ffff800015706be0 x20: dfff800000000000 x19: fffffc0000171300 x18: 0000000000000000 x17: 0000000000000000 x16: 0000000000000000 x15: 0000000000000000 x14: 1ffff000035b2e5c x13: 0000000000000014 x12: ffff7f800002e267 x11: 1fffff800002e266 x10: ffff7f800002e266 x9 : 0000000000000000 x8 : ffff600000b89a00 x7 : 0000000000000000 x6 : 000000000000003f x5 : 0000000000000040 x4 : 1ffff0000304dd80 x3 : 1fffe0000221d001 x2 : 0000000000000004 x1 : 0000000000000040 x0 : ffff000005c4c580 Call trace: clear_page+0x14/0x28 arch/arm64/lib/clear_page.S:21 kernel_init_free_pages mm/page_alloc.c:1283 [inline] post_alloc_hook+0x1ac/0x25c mm/page_alloc.c:2426 prep_new_page mm/page_alloc.c:2436 [inline] get_page_from_freelist+0x1840/0x2310 mm/page_alloc.c:4169 __alloc_pages+0x1a8/0x2234 mm/page_alloc.c:5391 alloc_pages_vma+0xb4/0x4dc mm/mempolicy.c:2208 wp_page_copy+0x194/0x1600 mm/memory.c:3003 do_wp_page+0x1d8/0xbbc mm/memory.c:3313 handle_pte_fault mm/memory.c:4576 [inline] __handle_mm_fault+0x10a0/0x25e4 mm/memory.c:4693 handle_mm_fault+0x1dc/0x4ec mm/memory.c:4791 __do_page_fault arch/arm64/mm/fault.c:512 [inline] do_page_fault+0x230/0x8c0 arch/arm64/mm/fault.c:612 do_mem_abort+0x64/0x1c0 arch/arm64/mm/fault.c:826 el0_da+0x3c/0x50 arch/arm64/kernel/entry-common.c:409 el0t_64_sync_handler+0x168/0x1ac arch/arm64/kernel/entry-common.c:530 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:574