------------[ cut here ]------------ WARNING: CPU: 3 PID: 5136 at include/linux/cpumask.h:143 cpu_max_bits_warn include/linux/cpumask.h:143 [inline] WARNING: CPU: 3 PID: 5136 at include/linux/cpumask.h:143 cpumask_check include/linux/cpumask.h:150 [inline] WARNING: CPU: 3 PID: 5136 at include/linux/cpumask.h:143 cpumask_next include/linux/cpumask.h:212 [inline] WARNING: CPU: 3 PID: 5136 at include/linux/cpumask.h:143 c_start+0x1da/0x250 arch/x86/kernel/cpu/proc.c:156 Modules linked in: CPU: 3 PID: 5136 Comm: syz-fuzzer Not tainted 6.3.0-rc1-syzkaller-00106-g44889ba56cbb #0 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.14.0-2 04/01/2014 RIP: 0010:cpu_max_bits_warn include/linux/cpumask.h:143 [inline] RIP: 0010:cpumask_check include/linux/cpumask.h:150 [inline] RIP: 0010:cpumask_next include/linux/cpumask.h:212 [inline] RIP: 0010:c_start+0x1da/0x250 arch/x86/kernel/cpu/proc.c:156 Code: 49 11 8c e8 88 a9 51 00 4c 89 e0 5b 5d 41 5c 41 5d 41 5e c3 f3 48 0f bc db e8 72 a9 51 00 89 db e9 38 ff ff ff e8 66 a9 51 00 <0f> 0b e9 c1 fe ff ff 48 c7 c7 80 7f 77 8e e8 d3 49 a2 00 e9 67 ff RSP: 0018:ffffc90001ee7c68 EFLAGS: 00010293 RAX: 0000000000000000 RBX: 0000000000000007 RCX: 0000000000000000 RDX: ffff888023996000 RSI: ffffffff813279da RDI: 0000000000000004 RBP: ffffffff8e777f80 R08: 0000000000000004 R09: 0000000000000007 R10: 0000000000000004 R11: 0000000000000000 R12: ffff88801f2ded60 R13: 0000000000000008 R14: 0000000000000004 R15: 0000000000000000 FS: 0000000001ec53d0(0000) GS:ffff88802cb80000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f08961ed698 CR3: 00000000141a7000 CR4: 0000000000150ee0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: seq_read_iter+0x2ca/0x12d0 fs/seq_file.c:225 proc_reg_read_iter+0x115/0x2d0 fs/proc/inode.c:301 call_read_iter include/linux/fs.h:1845 [inline] new_sync_read fs/read_write.c:389 [inline] vfs_read+0x681/0x930 fs/read_write.c:470 ksys_read+0x12b/0x250 fs/read_write.c:613 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x403ace Code: 48 89 6c 24 38 48 8d 6c 24 38 e8 0d 00 00 00 48 8b 6c 24 38 48 83 c4 40 c3 cc cc cc 49 89 f2 48 89 fa 48 89 ce 48 89 df 0f 05 <48> 3d 01 f0 ff ff 76 15 48 f7 d8 48 89 c1 48 c7 c0 ff ff ff ff 48 RSP: 002b:000000c000561308 EFLAGS: 00000202 ORIG_RAX: 0000000000000000 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000403ace RDX: 0000000000000b49 RSI: 000000c0003ae4b7 RDI: 0000000000000003 RBP: 000000c000561348 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000202 R12: 000000c000561488 R13: 0000000000000000 R14: 000000c0000061a0 R15: 0000000000000001