Subject: linux-next: build failure after merge of the block tree

From: Mark Brown <[email-masked]>
Date: Fri, 23 Jan 2026 17:42:59 +0000

Hi all,

After merging the block tree, today's linux-next build (x86 allmodconfig)
failed like this:

In file included from /tmp/next/build/include/linux/string.h:386,
                 from /tmp/next/build/include/linux/bitmap.h:13,
                 from /tmp/next/build/include/linux/cpumask.h:11,
                 from /tmp/next/build/arch/x86/include/asm/paravirt.h:21,
                 from /tmp/next/build/arch/x86/include/asm/cpuid/api.h:57,
                 from /tmp/next/build/arch/x86/include/asm/processor.h:19,
                 from /tmp/next/build/include/linux/sched.h:13,
                 from /tmp/next/build/include/linux/io_uring.h:5,
                 from /tmp/next/build/io_uring/bpf_filter.c:7:
In function 'fortify_memset_chk',
    inlined from 'io_uring_populate_bpf_ctx' at /tmp/next/build/io_uring/bpf_filter.c:33:2:
/tmp/next/build/include/linux/fortify-string.h:480:25: error: call to '__write_overflow_field' declared with attribute warning: detected write beyond size of field (1st parameter); maybe use struct_group()? [-Werror=attribute-warning]
  480 |                         __write_overflow_field(p_size_field, size);
      |                         ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
cc1: all warnings being treated as errors

Caused by commit

  f1e3672e49e2c (io_uring: add support for BPF filtering for opcode restrictions)

I have used the tree from 20260122 instead.