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Martin Schiller d8a11e0f4e net/x25: fix nonblocking connect 
commit e21dba7a4d upstream.

This patch fixes 2 issues in x25_connect():

1. It makes absolutely no sense to reset the neighbour and the
connection state after a (successful) nonblocking call of x25_connect.
This prevents any connection from being established, since the response
(call accept) cannot be processed.

2. Any further calls to x25_connect() while a call is pending should
simply return, instead of creating new Call Request (on different
logical channels).

This patch should also fix the "KASAN: null-ptr-deref Write in
x25_connect" and "BUG: unable to handle kernel NULL pointer dereference
in x25_connect" bugs reported by syzbot.

Signed-off-by: Martin Schiller <ms@dev.tdt.de>
Reported-by: syzbot+429c200ffc8772bfe070@syzkaller.appspotmail.com
Reported-by: syzbot+eec0c87f31a7c3b66f7b@syzkaller.appspotmail.com
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2020-01-29 16:45:33 +01:00
arch
block
certs
crypto
Documentation
drivers media: v4l2-ioctl.c: zero reserved fields for S/TRY_FMT 2020-01-29 16:45:33 +01:00
fs readdir: be more conservative with directory entry names 2020-01-29 16:45:31 +01:00
include netfilter: nf_tables: autoload modules from the abort path 2020-01-29 16:45:33 +01:00
init
ipc
kernel
lib lib: Reduce user_access_begin() boundaries in strncpy_from_user() and strnlen_user() 2020-01-29 16:45:29 +01:00
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mm
net net/x25: fix nonblocking connect 2020-01-29 16:45:33 +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.