------------[ cut here ]------------
WARNING: CPU: 1 PID: 5021 at mm/page_alloc.c:5634 __alloc_pages+0xd0/0x544 mm/page_alloc.c:5634
Modules linked in:
CPU: 1 PID: 5021 Comm: syz.1.243 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/31/2026
pstate: 22400005 (nzCv daif +PAN -UAO +TCO -DIT -SSBS BTYPE=--)
pc : __alloc_pages+0xd0/0x544 mm/page_alloc.c:5634
lr : __alloc_pages+0xac/0x544 mm/page_alloc.c:5628
sp : ffff800022b27800
x29: ffff800022b278d0 x28: ffff800022b27a40 x27: dfff800000000000
x26: ffff800022b27820 x25: dfff800000000000 x24: ffff700004564f04
x23: ffff0000e1b70000 x22: 0000000000000000 x21: 0000000000040d40
x20: 0000000000000000 x19: 0000000000000014 x18: 1fffe00033c2597e
x17: ffff8000163dd000 x16: ffff8000082de324 x15: ffff800008a49854
x14: 0000000000000005 x13: 1ffff00004564f08 x12: 0000000000000000
x11: 0000000000000000 x10: ffff700004564f0d x9 : 0000000000000001
x8 : ffff800018db3000 x7 : 0000000000000000 x6 : ffff80000805ab74
x5 : ffff0000da66d3a0 x4 : 0000000000000000 x3 : 0000000000000020
x2 : 0000000000000008 x1 : 0000000000000000 x0 : 0000000000000000
Call trace:
 __alloc_pages+0xd0/0x544 mm/page_alloc.c:5634
 __alloc_pages_node include/linux/gfp.h:237 [inline]
 alloc_pages_node include/linux/gfp.h:260 [inline]
 __kmalloc_large_node+0x9c/0x1dc mm/slab_common.c:1077
 __do_kmalloc_node mm/slab_common.c:924 [inline]
 __kmalloc+0x12c/0x180 mm/slab_common.c:949
 kmalloc include/linux/slab.h:568 [inline]
 kzalloc include/linux/slab.h:699 [inline]
 __v9fs_get_acl+0x58/0x14c fs/9p/acl.c:28
 v9fs_get_acl+0xb8/0x2c0 fs/9p/acl.c:63
 v9fs_mount+0x714/0x9e8 fs/9p/vfs_super.c:184
 legacy_get_tree+0xd8/0x174 fs/fs_context.c:632
 vfs_get_tree+0x90/0x278 fs/super.c:1584
 do_new_mount+0x228/0x818 fs/namespace.c:3104
 path_mount+0x5ac/0xe6c fs/namespace.c:3462
 do_mount fs/namespace.c:3475 [inline]
 __do_sys_mount fs/namespace.c:3683 [inline]
 __se_sys_mount fs/namespace.c:3660 [inline]
 __arm64_sys_mount+0x4a0/0x5a0 fs/namespace.c:3660
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall+0x98/0x290 arch/arm64/kernel/syscall.c:52
 el0_svc_common+0x13c/0x258 arch/arm64/kernel/syscall.c:140
 do_el0_svc+0x5c/0x134 arch/arm64/kernel/syscall.c:204
 el0_svc+0x58/0x12c arch/arm64/kernel/entry-common.c:637
 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655
 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:589
irq event stamp: 1274
hardirqs last  enabled at (1273): [<ffff8000088fd190>] kasan_quarantine_put+0xc4/0x200 mm/kasan/quarantine.c:240
hardirqs last disabled at (1274): [<ffff800011b9d7f8>] el1_dbg+0x24/0x80 arch/arm64/kernel/entry-common.c:405
softirqs last  enabled at (996): [<ffff80000879a508>] spin_unlock_bh include/linux/spinlock.h:396 [inline]
softirqs last  enabled at (996): [<ffff80000879a508>] bdi_register_va+0x504/0x81c mm/backing-dev.c:904
softirqs last disabled at (994): [<ffff80000879a2f4>] spin_lock_bh include/linux/spinlock.h:356 [inline]
softirqs last disabled at (994): [<ffff80000879a2f4>] bdi_register_va+0x2f0/0x81c mm/backing-dev.c:894
---[ end trace 0000000000000000 ]---