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Yonghong Song a115d0ed72 bpf: set inner_map_meta->spin_lock_off correctly Commit `d83525ca62` ("bpf: introduce bpf_spin_lock") introduced bpf_spin_lock and the field spin_lock_off in kernel internal structure bpf_map has the following meaning: >=0 valid offset, <0 error For every map created, the kernel will ensure spin_lock_off has correct value. Currently, bpf_map->spin_lock_off is not copied from the inner map to the map_in_map inner_map_meta during a map_in_map type map creation, so inner_map_meta->spin_lock_off = 0. This will give verifier wrong information that inner_map has bpf_spin_lock and the bpf_spin_lock is defined at offset 0. An access to offset 0 of a value pointer will trigger the following error: bpf_spin_lock cannot be accessed directly by load/store This patch fixed the issue by copy inner map's spin_lock_off value to inner_map_meta->spin_lock_off. Fixes: `d83525ca62` ("bpf: introduce bpf_spin_lock") Signed-off-by: Yonghong Song <yhs@fb.com> Acked-by: Andrii Nakryiko <andriin@fb.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org>		2019-02-27 17:03:13 -08:00
arch
block
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Documentation	xsk: add FAQ to facilitate for first time users	2019-02-25 23:21:42 +01:00
drivers	bnx2x: Remove set but not used variable 'mfw_vn'	2019-02-18 16:47:32 -08:00
firmware
fs
include	bpf: expose program stats via bpf_prog_info	2019-02-27 17:22:50 +01:00
init
ipc
kernel	bpf: set inner_map_meta->spin_lock_off correctly	2019-02-27 17:03:13 -08:00
lib	bpf: test_bpf: turn off preemption in function __run_once	2019-02-25 22:18:07 +01:00
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mm
net	bpf/test_run: fix unkillable BPF_PROG_TEST_RUN for flow dissector	2019-02-25 22:21:22 +01:00
samples	samples: bpf: fix: broken sample regarding removed function	2019-02-27 17:27:22 +01:00
scripts
security
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tools	tools/bpftool: recognize bpf_prog_info run_time_ns and run_cnt	2019-02-27 17:22:51 +01:00
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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.