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Yonghong Song e1afb70252 bpf: check signal validity in nmi for bpf_send_signal() helper 
Commit 8b401f9ed2 ("bpf: implement bpf_send_signal() helper")
introduced bpf_send_signal() helper. If the context is nmi,
the sending signal work needs to be deferred to irq_work.
If the signal is invalid, the error will appear in irq_work
and it won't be propagated to user.

This patch did an early check in the helper itself to notify
user invalid signal, as suggested by Daniel.

Suggested-by: Daniel Borkmann <daniel@iogearbox.net>
Signed-off-by: Yonghong Song <yhs@fb.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
2019-05-28 10:51:33 +02:00
arch riscv: bpf: eliminate zero extension code-gen 2019-05-24 18:58:38 -07:00
block
certs
crypto
Documentation dt-bindings: phy: dp83867: Add documentation for disabling clock output 2019-05-22 17:40:17 -07:00
drivers nfp: bpf: eliminate zero extension code-gen 2019-05-24 18:58:38 -07:00
fs
include bpf: introduce new bpf prog load flags "BPF_F_TEST_RND_HI32" 2019-05-24 18:58:37 -07:00
init
ipc
kernel bpf: check signal validity in nmi for bpf_send_signal() helper 2019-05-28 10:51:33 +02:00
lib
LICENSES
mm
net hv_sock: perf: loop in send() to maximize bandwidth 2019-05-22 18:00:36 -07:00
samples samples: bpf: add ibumad sample to .gitignore 2019-05-24 19:58:03 -07:00
scripts
security
sound
tools bpftool: auto-complete BTF IDs for btf dump 2019-05-28 10:50:27 +02:00
usr
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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.