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Filename Latest commit message Latest commit date
Lin, Zhenpeng 5ab04a4ffe dccp: don't duplicate ccid when cloning dccp sock 
commit d9ea761fdd197351890418acd462c51f241014a7 upstream.

Commit 2677d20677 ("dccp: don't free ccid2_hc_tx_sock ...") fixed
a UAF but reintroduced CVE-2017-6074.

When the sock is cloned, two dccps_hc_tx_ccid will reference to the
same ccid. So one can free the ccid object twice from two socks after
cloning.

This issue was found by "Hadar Manor" as well and assigned with
CVE-2020-16119, which was fixed in Ubuntu's kernel. So here I port
the patch from Ubuntu to fix it.

The patch prevents cloned socks from referencing the same ccid.

Fixes: 2677d20677 ("dccp: don't free ccid2_hc_tx_sock ...")
Signed-off-by: Zhenpeng Lin <zplin@psu.edu>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-09-22 12:26:40 +02:00
arch x86/mm: Fix kern_addr_valid() to cope with existing but not present entries 2021-09-22 12:26:40 +02:00
block scsi: bsg: Remove support for SCSI_IOCTL_SEND_COMMAND 2021-09-22 12:26:23 +02:00
certs
crypto
Documentation docs: Fix infiniband uverbs minor number 2021-09-22 12:26:23 +02:00
drivers ptp: dp83640: don't define PAGE0 2021-09-22 12:26:40 +02:00
fs btrfs: fix upper limit for max_inline for page size 64K 2021-09-22 12:26:38 +02:00
include mm/hugetlb: initialize hugetlb_usage in mm_init 2021-09-22 12:26:37 +02:00
init
ipc
kernel memcg: enable accounting for pids in nested pid namespaces 2021-09-22 12:26:37 +02:00
lib lib/test_stackinit: Fix static initializer test 2021-09-22 12:26:38 +02:00
LICENSES
mm mm,vmscan: fix divide by zero in get_scan_count 2021-09-22 12:26:37 +02:00
net dccp: don't duplicate ccid when cloning dccp sock 2021-09-22 12:26:40 +02:00
samples samples: bpf: Fix tracex7 error raised on the missing argument 2021-09-22 12:26:30 +02:00
scripts kbuild: Fix 'no symbols' warning when CONFIG_TRIM_UNUSD_KSYMS=y 2021-09-22 12:26:26 +02:00
security Smack: Fix wrong semantics in smk_access_entry() 2021-09-22 12:26:27 +02:00
sound ASoC: rockchip: i2s: Fixup config for DAIFMT_DSP_A/B 2021-09-22 12:26:35 +02:00
tools selftests/bpf: Enlarge select() timeout for test_maps 2021-09-22 12:26:34 +02:00
usr
virt
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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.