------------[ cut here ]------------ WARNING: CPU: 0 PID: 493 at mm/page_alloc.c:4816 __alloc_pages_noprof+0x39d/0x4f0 mm/page_alloc.c:4816 Modules linked in: CPU: 0 UID: 0 PID: 493 Comm: syz.2.17 Not tainted syzkaller #0 8d65e90dbe1404ddf645e2739a84308a106aec5b Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026 RIP: 0010:__alloc_pages_noprof+0x39d/0x4f0 mm/page_alloc.c:4816 Code: 00 48 3b 8c 24 c0 00 00 00 0f 85 b6 00 00 00 48 8d 65 d8 5b 41 5c 41 5d 41 5e 41 5f 5d c3 cc cc cc cc cc c6 05 b9 46 96 05 01 <0f> 0b eb 9e a9 00 00 08 00 48 8b 54 24 20 75 59 44 89 f1 81 e1 7f RSP: 0018:ffffc90000ff7900 EFLAGS: 00010246 RAX: ffffc90000ff7900 RBX: 0000000000000013 RCX: 0000000000000000 RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffc90000ff7988 RBP: ffffc90000ff7a20 R08: ffffc90000ff7987 R09: 0000000000000000 R10: ffffc90000ff7970 R11: fffff520001fef31 R12: 0000000000000000 R13: 1ffff920001fef28 R14: 0000000000040cc0 R15: dffffc0000000000 FS: 00007fa263ef06c0(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fa262e70000 CR3: 0000000117286000 CR4: 00000000003526b0 Call Trace: ___kmalloc_large_node+0x63/0x140 mm/slub.c:-1 __kmalloc_large_node_noprof+0x1e/0xd0 mm/slub.c:4304 __do_kmalloc_node mm/slub.c:4320 [inline] __kmalloc_node_track_caller_noprof+0x294/0x480 mm/slub.c:4351 memdup_user_nul+0x70/0x160 mm/util.c:313 bitmap_parse_user+0x29/0x80 lib/bitmap-str.c:31 cpumask_parse_user include/linux/cpumask.h:876 [inline] write_irq_affinity kernel/irq/proc.c:151 [inline] irq_affinity_proc_write+0x139/0x230 kernel/irq/proc.c:180 pde_write fs/proc/inode.c:330 [inline] proc_reg_write+0x1f7/0x2f0 fs/proc/inode.c:342 vfs_write+0x395/0xf80 fs/read_write.c:681 ksys_write+0x145/0x260 fs/read_write.c:736 __do_sys_write fs/read_write.c:748 [inline] __se_sys_write fs/read_write.c:745 [inline] __x64_sys_write+0x7f/0x90 fs/read_write.c:745 x64_sys_call+0x271c/0x2ee0 arch/x86/include/generated/asm/syscalls_64.h:2 do_syscall_x64 arch/x86/entry/common.c:47 [inline] do_syscall_64+0x57/0xf0 arch/x86/entry/common.c:78 entry_SYSCALL_64_after_hwframe+0x76/0x7e RIP: 0033:0x7fa262f9e0d9 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:00007fa263ef0028 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00007fa263225fa0 RCX: 00007fa262f9e0d9 RDX: 00000000fffffdd4 RSI: 0000200000000340 RDI: 0000000000000003 RBP: 00007fa263035024 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fa263226038 R14: 00007fa263225fa0 R15: 00007fff6c83e868 ---[ end trace 0000000000000000 ]---