syzbot

watchdog: BUG: soft lockup - CPU#1 stuck for 22s! [jbd2/vda-8:3110]
Modules linked in:
irq event stamp: 264846
hardirqs last  enabled at (264845): [<ffff8000145855d8>] exit_to_kernel_mode+0x38/0x230 arch/arm64/kernel/entry-common.c:71
hardirqs last disabled at (264846): [<ffff800014585590>] enter_el1_irq_or_nmi+0x10/0x20 arch/arm64/kernel/entry-common.c:113
softirqs last  enabled at (264798): [<ffff8000100109a4>] _stext+0x9a4/0x1050
softirqs last disabled at (264697): [<ffff800010162530>] do_softirq_own_stack include/asm-generic/softirq_stack.h:10 [inline]
softirqs last disabled at (264697): [<ffff800010162530>] invoke_softirq kernel/softirq.c:439 [inline]
softirqs last disabled at (264697): [<ffff800010162530>] __irq_exit_rcu+0x470/0x520 kernel/softirq.c:636
CPU: 1 PID: 3110 Comm: jbd2/vda-8 Not tainted 5.14.0-rc7-syzkaller-00015-gfe67f4dd8daa #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 : ffff80001f077170
x29: ffff80001f077170 x28: 0000000000000000 x27: ffff00007fc11ec0
x26: ffff0000101214b8 x25: ffff600002024297 x24: 00000000000014b8
x23: ffff000010120000 x22: fffffc0000171340 x21: ffff800015707dc0
x20: dfff800000000000 x19: fffffc0000171300 x18: ffff00006aa70c08
x17: 0000000000000000 x16: 0000000000000000 x15: ffff00006aa70c3c
x14: 1ffff00003e0edf8 x13: 0000000000000014 x12: ffff7f800002e267
x11: 1fffff800002e266 x10: ffff7f800002e266 x9 : 0000000000000000
x8 : ffff600000b89a00 x7 : 0000000000000000 x6 : 000000000000003f
x5 : 0000000000000040 x4 : 1ffff0000304df80 x3 : 1fffe00002024001
x2 : 0000000000000004 x1 : 0000000000000040 x0 : ffff000005c4c640
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:4168
 __alloc_pages+0x1a8/0x2234 mm/page_alloc.c:5390
 alloc_pages+0x230/0x360 mm/mempolicy.c:2244
 __page_cache_alloc mm/filemap.c:1005 [inline]
 pagecache_get_page+0x490/0x9a0 mm/filemap.c:1885
 find_or_create_page include/linux/pagemap.h:420 [inline]
 grow_dev_page fs/buffer.c:949 [inline]
 grow_buffers fs/buffer.c:1014 [inline]
 __getblk_slow+0x170/0x574 fs/buffer.c:1041
 __getblk_gfp+0x7c/0x9c fs/buffer.c:1334
 __getblk include/linux/buffer_head.h:382 [inline]
 jbd2_journal_get_descriptor_buffer+0xf0/0x3f0 fs/jbd2/journal.c:1014
 jbd2_journal_commit_transaction+0x1410/0x4390 fs/jbd2/commit.c:656
 kjournald2+0x190/0x734 fs/jbd2/journal.c:213
 kthread+0x334/0x3dc kernel/kthread.c:319
 ret_from_fork+0x10/0x18 arch/arm64/kernel/entry.S:782