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Greg KH 27414f90ff RDMA/cxgb4: Do not dma memory off of the stack 
commit 3840c5b788 upstream.

Nicolas pointed out that the cxgb4 driver is doing dma off of the stack,
which is generally considered a very bad thing.  On some architectures it
could be a security problem, but odds are none of them actually run this
driver, so it's just a "normal" bug.

Resolve this by allocating the memory for a message off of the heap
instead of the stack.  kmalloc() always will give us a proper memory
location that DMA will work correctly from.

Link: https://lore.kernel.org/r/20191001165611.GA3542072@kroah.com
Reported-by: Nicolas Waisman <nico@semmle.com>
Tested-by: Potnuri Bharat Teja <bharat@chelsio.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-10-29 09:20:09 +01:00
arch x86/apic/x2apic: Fix a NULL pointer deref when handling a dying cpu 2019-10-29 09:20:04 +01:00
block blk-rq-qos: fix first node deletion of rq_qos_del() 2019-10-29 09:20:09 +01:00
certs
crypto crypto: skcipher - Unmap pages after an external error 2019-10-11 18:20:52 +02:00
Documentation USB: rio500: Remove Rio 500 kernel driver 2019-10-17 13:44:47 -07:00
drivers RDMA/cxgb4: Do not dma memory off of the stack 2019-10-29 09:20:09 +01:00
firmware
fs Btrfs: check for the full sync flag while holding the inode lock during fsync 2019-10-29 09:20:07 +01:00
include btrfs: tracepoints: Fix bad entry members of qgroup events 2019-10-29 09:20:07 +01:00
init
ipc
kernel tracing: Fix race in perf_trace_buf initialization 2019-10-29 09:20:03 +01:00
lib lib: textsearch: fix escapes in example code 2019-10-29 09:19:35 +01:00
LICENSES
mm mm/memory-failure: poison read receives SIGKILL instead of SIGBUS if mmaped more than once 2019-10-29 09:19:59 +01:00
net mac80211: Reject malformed SSID elements 2019-10-29 09:19:53 +01:00
samples
scripts namespace: fix namespace.pl script to support relative paths 2019-10-29 09:19:36 +01:00
security ima: fix freeing ongoing ahash_request 2019-10-11 18:21:11 +02:00
sound ASoC: rsnd: Reinitialize bit clock inversion flag for every format setting 2019-10-29 09:19:52 +01:00
tools perf inject jit: Fix JIT_CODE_MOVE filename 2019-10-17 13:45:15 -07:00
usr
virt
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.cocciconfig
.get_maintainer.ignore
.gitattributes
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COPYING
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Kconfig
MAINTAINERS USB: rio500: Remove Rio 500 kernel driver 2019-10-17 13:44:47 -07:00
Makefile Linux 4.19.80 2019-10-17 13:45:44 -07:00
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.
See Documentation/00-INDEX for a list of what is contained in each file.

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.