------------[ cut here ]------------ WARNING: CPU: 1 PID: 3682 at include/linux/cpumask.h:110 cpu_max_bits_warn include/linux/cpumask.h:110 [inline] WARNING: CPU: 1 PID: 3682 at include/linux/cpumask.h:110 cpumask_check include/linux/cpumask.h:117 [inline] WARNING: CPU: 1 PID: 3682 at include/linux/cpumask.h:110 cpumask_next include/linux/cpumask.h:178 [inline] WARNING: CPU: 1 PID: 3682 at include/linux/cpumask.h:110 c_start+0x152/0x1b0 arch/x86/kernel/cpu/proc.c:156 Modules linked in: CPU: 1 PID: 3682 Comm: syz-fuzzer Not tainted 6.0.0-syzkaller-12196-g1501278bb7ba #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:110 [inline] RIP: 0010:cpumask_check include/linux/cpumask.h:117 [inline] RIP: 0010:cpumask_next include/linux/cpumask.h:178 [inline] RIP: 0010:c_start+0x152/0x1b0 arch/x86/kernel/cpu/proc.c:156 Code: a0 98 99 8b e8 df 87 4c 00 5b 5d 4c 89 e0 41 5c 41 5d c3 e8 d0 87 4c 00 45 31 e4 5b 4c 89 e0 5d 41 5c 41 5d c3 e8 be 87 4c 00 <0f> 0b e9 1e ff ff ff 48 c7 c7 80 09 e2 8d e8 cb cd 98 00 e9 6b ff RSP: 0018:ffffc90003907c70 EFLAGS: 00010293 RAX: 0000000000000000 RBX: ffffffff8de20980 RCX: 0000000000000000 RDX: ffff888014921d40 RSI: ffffffff812ffc02 RDI: 0000000000000004 RBP: 0000000000000008 R08: 0000000000000004 R09: 0000000000000008 R10: 0000000000000008 R11: 0000000000000001 R12: ffff88801ab52968 R13: 0000000000000008 R14: ffff88801b70237c R15: 0000000000000000 FS: 000000c0001d7490(0000) GS:ffff88802c900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000dc3f13 CR3: 000000001a24a000 CR4: 0000000000150ee0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: seq_read_iter+0x2c6/0x1280 fs/seq_file.c:225 proc_reg_read_iter+0x111/0x2d0 fs/proc/inode.c:301 call_read_iter include/linux/fs.h:2185 [inline] new_sync_read fs/read_write.c:389 [inline] vfs_read+0x67d/0x930 fs/read_write.c:470 ksys_read+0x127/0x250 fs/read_write.c:613 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x4ae09b Code: e8 ea 57 fb ff eb 88 cc cc cc cc cc cc cc cc e8 fb 9b fb ff 48 8b 7c 24 10 48 8b 74 24 18 48 8b 54 24 20 48 8b 44 24 08 0f 05 <48> 3d 01 f0 ff ff 76 20 48 c7 44 24 28 ff ff ff ff 48 c7 44 24 30 RSP: 002b:000000c0004693b8 EFLAGS: 00000212 ORIG_RAX: 0000000000000000 RAX: ffffffffffffffda RBX: 000000c00003c000 RCX: 00000000004ae09b RDX: 0000000000000b49 RSI: 000000c00052b4b7 RDI: 0000000000000003 RBP: 000000c000469408 R08: 0000000000000001 R09: 000000c00055e1e0 R10: 0000000000000b49 R11: 0000000000000212 R12: 000000c000469570 R13: 0000000000000000 R14: 000000c0000001a0 R15: 00007f9358c24a94