------------[ cut here ]------------
WARNING: CPU: 1 PID: 4579 at mm/page_alloc.c:5440 __alloc_pages+0x33c/0x674 mm/page_alloc.c:5440
Modules linked in:
CPU: 1 PID: 4579 Comm: syz.2.180 Not tainted 5.15.174-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/25/2024
pstate: 20400005 (nzCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : __alloc_pages+0x33c/0x674 mm/page_alloc.c:5440
lr : __alloc_pages+0xc8/0x674 mm/page_alloc.c:5433
sp : ffff8000201a76c0
x29: ffff8000201a77b0 x28: ffff8000201a76e0 x27: dfff800000000000
x26: ffff700004034edc x25: 0000000000000000 x24: ffff8000201a7700
x23: ffff80001b840604 x22: 0000000000040d40 x21: 0000000000000000
x20: ffff8000201a7720 x19: 000000000000001a x18: 0000000000000000
x17: 0000000000000002 x16: ffff8000088a9814 x15: 0000000000000005
x14: ffff0000c0b88000 x13: 0000000000ff0100 x12: 0000000000000005
x11: 1ffff00004034ee4 x10: 0000000000000000 x9 : 0000000000000000
x8 : ffff8000201a7748 x7 : 0000000000000000 x6 : ffff80000805d4a8
x5 : ffff0000e93f1868 x4 : 0000000000000000 x3 : 0000000000000020
x2 : 0000000000000008 x1 : 0000000000000000 x0 : ffff8000201a7720
Call trace:
 __alloc_pages+0x33c/0x674 mm/page_alloc.c:5440
 alloc_pages+0x368/0x5d4
 kmalloc_order+0x40/0x154 mm/slab_common.c:966
 kmalloc_order_trace+0x30/0x21c mm/slab_common.c:982
 kmalloc_large include/linux/slab.h:520 [inline]
 __kmalloc+0x35c/0x4c8 mm/slub.c:4396
 kmalloc include/linux/slab.h:596 [inline]
 kzalloc include/linux/slab.h:721 [inline]
 __v9fs_get_acl+0x58/0x150 fs/9p/acl.c:36
 v9fs_get_acl+0xa4/0x2f0 fs/9p/acl.c:70
 v9fs_mount+0x604/0x780 fs/9p/vfs_super.c:184
 legacy_get_tree+0xd4/0x16c fs/fs_context.c:611
 vfs_get_tree+0x90/0x274 fs/super.c:1530
 do_new_mount+0x278/0x8fc fs/namespace.c:3012
 path_mount+0x594/0x101c fs/namespace.c:3342
 do_mount fs/namespace.c:3355 [inline]
 __do_sys_mount fs/namespace.c:3563 [inline]
 __se_sys_mount fs/namespace.c:3540 [inline]
 __arm64_sys_mount+0x510/0x5e0 fs/namespace.c:3540
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:52
 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142
 do_el0_svc+0x58/0x14c arch/arm64/kernel/syscall.c:181
 el0_svc+0x7c/0x1f0 arch/arm64/kernel/entry-common.c:608
 el0t_64_sync_handler+0x84/0xe4 arch/arm64/kernel/entry-common.c:626
 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584
irq event stamp: 1782
hardirqs last  enabled at (1781): [<ffff8000088d7818>] kasan_quarantine_put+0xdc/0x204 mm/kasan/quarantine.c:231
hardirqs last disabled at (1782): [<ffff800011b4995c>] el1_dbg+0x24/0x80 arch/arm64/kernel/entry-common.c:396
softirqs last  enabled at (952): [<ffff80000877b36c>] spin_unlock_bh include/linux/spinlock.h:408 [inline]
softirqs last  enabled at (952): [<ffff80000877b36c>] bdi_register_va+0x50c/0x7f8 mm/backing-dev.c:904
softirqs last disabled at (950): [<ffff80000877b154>] spin_lock_bh include/linux/spinlock.h:368 [inline]
softirqs last disabled at (950): [<ffff80000877b154>] bdi_register_va+0x2f4/0x7f8 mm/backing-dev.c:894
---[ end trace 1a5da36b8fe46696 ]---