------------[ cut here ]------------
WARNING: CPU: 0 PID: 4385 at mm/page_alloc.c:5462 __alloc_pages+0x2b8/0x470 mm/page_alloc.c:5462
Modules linked in:
CPU: 0 PID: 4385 Comm: syz-executor.0 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/03/2025
pstate: 22400005 (nzCv daif +PAN -UAO +TCO -DIT -SSBS BTYPE=--)
pc : __alloc_pages+0x2b8/0x470 mm/page_alloc.c:5462
lr : __alloc_pages+0xac/0x470 mm/page_alloc.c:5455
sp : ffff80001fbb7740
x29: ffff80001fbb7810 x28: 1ffff000035e8a90 x27: ffff80001fbb7760
x26: ffff80001af45480 x25: dfff800000000000 x24: ffff700003f76eec
x23: ffff80001af45484 x22: 0000000000000000 x21: 0000000000040d40
x20: 0000000000000000 x19: 0000000000000014 x18: 0000000000000000
x17: 0000000000000000 x16: ffff80000881850c x15: 0000000000000005
x14: 0000000000000005 x13: 1ffff00003f76ef0 x12: 0000000000000000
x11: 0000000000000000 x10: ffff700003f76ef5 x9 : 1ffff00003f76ef4
x8 : ffff80001fbb77a8 x7 : 0000000000000000 x6 : ffff80000805b5c8
x5 : ffff0000da57afe8 x4 : 0000000000000000 x3 : 0000000000000020
x2 : 0000000000000008 x1 : 0000000000000000 x0 : ffff80001fbb7780
Call trace:
 __alloc_pages+0x2b8/0x470 mm/page_alloc.c:5462
 alloc_pages+0x34c/0x5c0 mm/mempolicy.c:-1
 kmalloc_order+0x44/0x15c mm/slab_common.c:986
 kmalloc_order_trace+0x30/0x240 mm/slab_common.c:1002
 kmalloc_large include/linux/slab.h:536 [inline]
 __kmalloc+0x310/0x43c mm/slub.c:4401
 kmalloc include/linux/slab.h:612 [inline]
 kzalloc include/linux/slab.h:738 [inline]
 __v9fs_get_acl+0x58/0x14c fs/9p/acl.c:36
 v9fs_get_acl+0xb8/0x2e0 fs/9p/acl.c:71
 v9fs_mount+0x5d0/0x758 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+0x228/0x810 fs/namespace.c:3034
 path_mount+0x5bc/0x1008 fs/namespace.c:3364
 do_mount fs/namespace.c:3377 [inline]
 __do_sys_mount fs/namespace.c:3585 [inline]
 __se_sys_mount fs/namespace.c:3562 [inline]
 __arm64_sys_mount+0x514/0x5f0 fs/namespace.c:3562
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall+0x98/0x2b0 arch/arm64/kernel/syscall.c:52
 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142
 do_el0_svc+0x58/0x13c arch/arm64/kernel/syscall.c:181
 el0_svc+0x78/0x1d0 arch/arm64/kernel/entry-common.c:608
 el0t_64_sync_handler+0xcc/0xe4 arch/arm64/kernel/entry-common.c:626
 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584
irq event stamp: 1870
hardirqs last  enabled at (1869): [<ffff8000088448c8>] kasan_quarantine_put+0xc4/0x200 mm/kasan/quarantine.c:231
hardirqs last disabled at (1870): [<ffff80001124d360>] el1_dbg+0x24/0x80 arch/arm64/kernel/entry-common.c:396
softirqs last  enabled at (990): [<ffff8000086ff1b0>] spin_unlock_bh include/linux/spinlock.h:409 [inline]
softirqs last  enabled at (990): [<ffff8000086ff1b0>] bdi_register_va+0x51c/0x7cc mm/backing-dev.c:904
softirqs last disabled at (988): [<ffff8000086fef9c>] spin_lock_bh include/linux/spinlock.h:369 [inline]
softirqs last disabled at (988): [<ffff8000086fef9c>] bdi_register_va+0x308/0x7cc mm/backing-dev.c:894
---[ end trace 84edca62754ae485 ]---