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Filename Latest commit message Latest commit date
Jakub Sitnicki cb675fde4c selftests/bpf: Test freeing sockmap/sockhash with a socket in it
commit 5d3919a953c3c96c02fc7a337f8376cde43ae31f upstream.

Commit 7e81a3530206 ("bpf: Sockmap, ensure sock lock held during tear
down") introduced sleeping issues inside RCU critical sections and while
holding a spinlock on sockmap/sockhash tear-down. There has to be at least
one socket in the map for the problem to surface.

This adds a test that triggers the warnings for broken locking rules. Not a
fix per se, but rather tooling to verify the accompanying fixes. Run on a
VM with 1 vCPU to reproduce the warnings.

Fixes: 7e81a3530206 ("bpf: Sockmap, ensure sock lock held during tear down")
Signed-off-by: Jakub Sitnicki <jakub@cloudflare.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: John Fastabend <john.fastabend@gmail.com>
Link: https://lore.kernel.org/bpf/20200206111652.694507-4-jakub@cloudflare.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2020-02-14 16:34:09 -05:00
arch powerpc/kuap: Fix set direction in allow/prevent_user_access() 2020-02-11 04:35:55 -08:00
block
certs
crypto crypto: api - Fix race condition in crypto_spawn_alg 2020-02-11 04:35:31 -08:00
Documentation
drivers iwlwifi: mvm: avoid use after free for pmsr request 2020-02-14 16:34:09 -05:00
fs cifs: fail i/o on soft mounts if sessionsetup errors out 2020-02-11 04:35:54 -08:00
include RDMA/uverbs: Verify MR access flags 2020-02-14 16:34:08 -05:00
init
ipc
kernel perf/core: Fix mlock accounting in perf_mmap() 2020-02-11 04:35:54 -08:00
lib
LICENSES
mm mm/mmu_gather: invalidate TLB correctly on batch allocation failure and flush 2020-02-11 04:35:42 -08:00
net bpf, sockhash: Synchronize_rcu before free'ing map 2020-02-14 16:34:09 -05:00
samples samples/bpf: Xdp_redirect_cpu fix missing tracepoint attach 2020-02-11 04:35:29 -08:00
scripts scripts/find-unused-docs: Fix massive false positives 2020-02-11 04:35:23 -08:00
security broken ping to ipv6 linklocal addresses on debian buster 2020-02-11 04:35:43 -08:00
sound ASoC: pcm: update FE/BE trigger order based on the command 2020-02-14 16:34:07 -05:00
tools selftests/bpf: Test freeing sockmap/sockhash with a socket in it 2020-02-14 16:34:09 -05:00
usr
virt KVM: Play nice with read-only memslots when querying host page size 2020-02-11 04:35:54 -08:00
.clang-format
.cocciconfig
.get_maintainer.ignore
.gitattributes
.gitignore
.mailmap
COPYING
CREDITS
Kbuild
Kconfig
MAINTAINERS
Makefile Linux 5.4.19 2020-02-11 04:35:55 -08:00
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.