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Martin KaFai Lau d7de72674a bpftool: Fix a leak of btf object 
When testing a map has btf or not, maps_have_btf() tests it by actually
getting a btf_fd from sys_bpf(BPF_BTF_GET_FD_BY_ID). However, it
forgot to btf__free() it.

In maps_have_btf() stage, there is no need to test it by really
calling sys_bpf(BPF_BTF_GET_FD_BY_ID). Testing non zero
info.btf_id is good enough.

Also, the err_close case is unnecessary, and also causes double
close() because the calling func do_dump() will close() all fds again.

Fixes: 99f9863a0c ("bpftool: Match maps by name")
Signed-off-by: Martin KaFai Lau <kafai@fb.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Acked-by: Andrii Nakryiko <andriin@fb.com>
Cc: Paul Chaignon <paul.chaignon@orange.com>
Link: https://lore.kernel.org/bpf/20200115230019.1101352-1-kafai@fb.com
2020-01-15 15:23:27 -08:00
arch bpf: Introduce BPF_MAP_TYPE_STRUCT_OPS 2020-01-09 08:46:18 -08:00
block
certs
crypto
Documentation Documentation: networking: Add stmmac to device drivers list 2020-01-07 13:38:56 -08:00
drivers ptp: clockmatrix: Rework clockmatrix version information. 2020-01-07 13:51:23 -08:00
fs File locking fix for v5.5 2019-12-29 09:50:57 -08:00
include bpf: Add batch ops to all htab bpf map 2020-01-15 14:00:35 -08:00
init Merge git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next 2019-12-27 14:20:10 -08:00
ipc
kernel bpf: Add batch ops to all htab bpf map 2020-01-15 14:00:35 -08:00
lib Merge branch 'fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2019-12-22 17:00:04 -08:00
LICENSES
mm
net xsk: Support allocations of large umems 2020-01-15 11:41:52 -08:00
samples Merge git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next 2019-12-27 14:20:10 -08:00
scripts libbpf: Clean up bpf_helper_defs.h generation output 2020-01-13 17:48:13 -08:00
security Two bugfix patches for 5.5. 2019-12-31 10:51:27 -08:00
sound
tools bpftool: Fix a leak of btf object 2020-01-15 15:23:27 -08:00
usr
virt
.clang-format
.cocciconfig
.get_maintainer.ignore
.gitattributes
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COPYING
CREDITS
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MAINTAINERS MAINTAINERS: Add stmmac Ethernet driver documentation entry 2020-01-07 13:38:56 -08:00
Makefile Linux 5.5-rc4 2019-12-29 15:29:16 -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.