On 21.08.25 14:19, Greg Kroah-Hartman wrote:

On Thu, Aug 21, 2025 at 10:49:09AM +0200, Thorsten Leemhuis wrote:

quoted

On 27.07.25 20:29, Carlos Llamas wrote:

quoted

From: Li Li <redacted>

Introduce a generic netlink multicast event to report binder transaction
failures to userspace. This allows subscribers to monitor these events
and take appropriate actions, such as stopping a misbehaving application
that is spamming a service with huge amount of transactions.

The multicast event contains full details of the failed transactions,
including the sender/target PIDs, payload size and specific error code.
This interface is defined using a YAML spec, from which the UAPI and
kernel headers and source are auto-generated.

It seems to me like this patch (which showed up in -next today after
Greg merged it) caused a build error for me in my daily -next builds
for Fedora when building tools/net/ynl:

"""
make[1]: Entering directory '/home/kbuilder/ark-vanilla/linux-knurd42/tools/net/ynl/lib'
gcc -std=gnu11 -O2 -W -Wall -Wextra -Wno-unused-parameter -Wshadow   -c -MMD -c -o ynl.o ynl.c
        AR ynl.a
make[1]: Leaving directory '/home/kbuilder/ark-vanilla/linux-knurd42/tools/net/ynl/lib'
make[1]: Entering directory '/home/kbuilder/ark-vanilla/linux-knurd42/tools/net/ynl/generated'
        GEN binder-user.c
Traceback (most recent call last):
  File "/home/kbuilder/ark-vanilla/linux-knurd42/tools/net/ynl/generated/../pyynl/ynl_gen_c.py", line 3673, in <module>
    main()
    ~~~~^^
  File "/home/kbuilder/ark-vanilla/linux-knurd42/tools/net/ynl/generated/../pyynl/ynl_gen_c.py", line 3382, in main
    parsed = Family(args.spec, exclude_ops)
  File "/home/kbuilder/ark-vanilla/linux-knurd42/tools/net/ynl/generated/../pyynl/ynl_gen_c.py", line 1205, in __init__
    super().__init__(file_name, exclude_ops=exclude_ops)
    ~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/kbuilder/ark-vanilla/linux-knurd42/tools/net/ynl/pyynl/lib/nlspec.py", line 462, in __init__
    jsonschema.validate(self.yaml, schema)
    ~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^
  File "/usr/lib/python3.13/site-packages/jsonschema/validators.py", line 1307, in validate
    raise error
jsonschema.exceptions.ValidationError: 'from_pid' does not match '^[0-9a-z-]+$'

Failed validating 'pattern' in schema['properties']['attribute-sets']['items']['properties']['attributes']['items']['properties']['name']:
    {'pattern': '^[0-9a-z-]+$', 'type': 'string'}

On instance['attribute-sets'][0]['attributes'][2]['name']:
    'from_pid'
make[1]: *** [Makefile:48: binder-user.c] Error 1
make[1]: Leaving directory '/home/kbuilder/ark-vanilla/linux-knurd42/tools/net/ynl/generated'
make: *** [Makefile:25: generated] Error 2
"""

Odd, this works for me.

Hmmm, happened on various Fedora releases and archs in Fedora's coprs
buildsys for me today. And with a local Fedora 41 x86_64 install, too;
in the latter case (just verified) both when checking out next-20250821
and 63740349eba78f ("binder: introduce transaction reports via netlink")
from -next.

How exactly are you building this?

Just "cd tools/net/ynl; make".

Ciao, Thorsten