------------[ cut here ]------------
WARNING: CPU: 1 PID: 8265 at mm/page_alloc.c:5634 __alloc_pages+0x2fe/0x4f0 mm/page_alloc.c:5634
Modules linked in:
CPU: 1 PID: 8265 Comm: syz.2.1356 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
RIP: 0010:__alloc_pages+0x2fe/0x4f0 mm/page_alloc.c:5634
Code: 0c 25 28 00 00 00 48 3b 8c 24 a0 00 00 00 0f 85 9f 00 00 00 48 8d 65 d8 5b 41 5c 41 5d 41 5e 41 5f 5d c3 c6 05 16 a1 44 0c 01 <0f> 0b eb a4 a9 00 00 08 00 8b 74 24 04 75 3e 44 89 f1 81 e1 7f ff
RSP: 0018:ffffc900051d7a20 EFLAGS: 00010246
RAX: ffffc900051d7a00 RBX: 1ffff92000a3af48 RCX: 0000000000000000
RDX: 0000000000000028 RSI: 0000000000000000 RDI: ffffc900051d7a88
RBP: ffffc900051d7b10 R08: ffffc900051d7a87 R09: ffffc900051d7a60
R10: dffffc0000000000 R11: fffff52000a3af51 R12: 0000000000000013
R13: 0000000000000000 R14: 0000000000040cc0 R15: dffffc0000000000
FS:  00007f671c2f56c0(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000020000002b000 CR3: 000000007e188000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 __alloc_pages_node include/linux/gfp.h:237 [inline]
 alloc_pages_node include/linux/gfp.h:260 [inline]
 __kmalloc_large_node+0x8c/0x1f0 mm/slab_common.c:1077
 __do_kmalloc_node mm/slab_common.c:924 [inline]
 __kmalloc_node_track_caller+0x10f/0x240 mm/slab_common.c:956
 memdup_user_nul+0x28/0xf0 mm/util.c:261
 bitmap_parse_user+0x1f/0x60 lib/bitmap.c:464
 cpumask_parse_user include/linux/cpumask.h:725 [inline]
 write_irq_affinity+0x1bc/0x310 kernel/irq/proc.c:153
 pde_write fs/proc/inode.c:340 [inline]
 proc_reg_write+0x1dd/0x2c0 fs/proc/inode.c:352
 vfs_write+0x2dc/0x9a0 fs/read_write.c:582
 ksys_write+0x14d/0x260 fs/read_write.c:637
 do_syscall_x64 arch/x86/entry/common.c:46 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:76
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f671b39e0d9
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f671c2f5028 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f671b625fa0 RCX: 00007f671b39e0d9
RDX: 00000000fffffcf0 RSI: 0000000000000000 RDI: 0000000000000003
RBP: 00007f671b435024 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f671b626038 R14: 00007f671b625fa0 R15: 00007ffee82f9f88
 </TASK>