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Paolo Abeni 2cbad98903 bpf: Do not WARN in bpf_warn_invalid_xdp_action() 
The WARN_ONCE() in bpf_warn_invalid_xdp_action() can be triggered by
any bugged program, and even attaching a correct program to a NIC
not supporting the given action.

The resulting splat, beyond polluting the logs, fouls automated tools:
e.g. a syzkaller reproducers using an XDP program returning an
unsupported action will never pass validation.

Replace the WARN_ONCE with a less intrusive pr_warn_once().

Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Toke Høiland-Jørgensen <toke@redhat.com>
Link: https://lore.kernel.org/bpf/016ceec56e4817ebb2a9e35ce794d5c917df572c.1638189075.git.pabeni@redhat.com
2021-12-13 22:25:51 +01:00
arch bpf: Add get_func_[arg|ret|arg_cnt] helpers 2021-12-13 09:25:59 -08:00
block Merge https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf 2021-12-08 16:06:44 -08:00
certs
crypto
Documentation Merge https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next 2021-12-10 15:56:13 -08:00
drivers net: ocelot: add FDMA support 2021-12-10 20:56:58 -08:00
fs net: add netns refcount tracker to struct seq_net_private 2021-12-10 06:38:26 -08:00
include bpf: Add get_func_[arg|ret|arg_cnt] helpers 2021-12-13 09:25:59 -08:00
init
ipc
kernel bpf: Add get_func_[arg|ret|arg_cnt] helpers 2021-12-13 09:25:59 -08:00
lib Merge https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next 2021-12-10 15:56:13 -08:00
LICENSES
mm Merge https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf 2021-12-08 16:06:44 -08:00
net bpf: Do not WARN in bpf_warn_invalid_xdp_action() 2021-12-13 22:25:51 +01:00
samples Merge https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next 2021-12-10 15:56:13 -08:00
scripts
security
sound sound fixes for 5.16-rc4 2021-12-01 10:07:39 -08:00
tools selftests/bpf: Add tests for get_func_[arg|ret|arg_cnt] helpers 2021-12-13 09:25:59 -08:00
usr
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MAINTAINERS Merge https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next 2021-12-10 15:56:13 -08:00
Makefile Makefile: Do not quote value for CONFIG_CC_IMPLICIT_FALLTHROUGH 2021-12-06 16:42:47 -08:00
README

README 

Linux kernel
============

There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.

In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``.  The formatted documentation can also be read online at:

    https://www.kernel.org/doc/html/latest/

There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.

Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.