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Filename Latest commit message Latest commit date
Ian Abbott 829fbd1ddf staging: comedi: ni_routes: fix null dereference in ni_find_route_source() 
commit 01e20b664f808a4f3048ca3f930911fd257209bd upstream.

In `ni_find_route_source()`, `tables->route_values` gets dereferenced.
However it is possible that `tables->route_values` is `NULL`, leading to
a null pointer dereference.  `tables->route_values` will be `NULL` if
the call to `ni_assign_device_routes()` during board initialization
returned an error due to missing device family routing information or
missing board-specific routing information.  For example, there is
currently no board-specific routing information provided for the
PCIe-6251 board and several other boards, so those are affected by this
bug.

The bug is triggered when `ni_find_route_source()` is called via
`ni_check_trigger_arg()` or `ni_check_trigger_arg_roffs()` when checking
the arguments for setting up asynchronous commands.  Fix it by returning
`-EINVAL` if `tables->route_values` is `NULL`.

Even with this fix, setting up asynchronous commands to use external
trigger sources for boards with missing routing information will still
fail gracefully.  Since `ni_find_route_source()` only depends on the
device family routing information, it would be better if that was made
available even if the board-specific routing information is missing.
That will be addressed by another patch.

Fixes: 4bb90c87ab ("staging: comedi: add interface to ni routing table information")
Cc: <stable@vger.kernel.org> # 4.20+
Cc: Spencer E. Olson <olsonse@umich.edu>
Signed-off-by: Ian Abbott <abbotti@mev.co.uk>
Link: https://lore.kernel.org/r/20200114182532.132058-2-abbotti@mev.co.uk
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2020-01-23 08:22:35 +01:00
arch ARM: davinci: select CONFIG_RESET_CONTROLLER 2020-01-23 08:22:32 +01:00
block block: fix an integer overflow in logical block size 2020-01-23 08:22:32 +01:00
certs
crypto crypto: algif_skcipher - Use chunksize instead of blocksize 2020-01-17 19:48:46 +01:00
Documentation mei: fix modalias documentation 2020-01-17 19:48:48 +01:00
drivers staging: comedi: ni_routes: fix null dereference in ni_find_route_source() 2020-01-23 08:22:35 +01:00
fs io_uring: only allow submit from owning task 2020-01-23 08:22:32 +01:00
include block: fix an integer overflow in logical block size 2020-01-23 08:22:32 +01:00
init Merge branch 'next-lockdown' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security 2019-09-28 08:14:15 -07:00
ipc ipc/sem.c: convert to use built-in RCU list checking 2019-09-25 17:51:41 -07:00
kernel perf: Correctly handle failed perf_get_aux_event() 2020-01-23 08:22:33 +01:00
lib sbitmap: only queue kyber's wait callback if not already active 2020-01-12 12:21:44 +01:00
LICENSES
mm uaccess: Add non-pagefault user-space write function 2020-01-17 19:48:40 +01:00
net rxrpc: Fix missing security check on incoming calls 2020-01-17 19:49:05 +01:00
samples samples: bpf: fix syscall_tp due to unused syscall 2020-01-12 12:21:26 +01:00
scripts kbuild/deb-pkg: annotate libelf-dev dependency as :native 2020-01-17 19:49:07 +01:00
security tomoyo: Suppress RCU warning at list_for_each_entry_rcu(). 2020-01-17 19:49:05 +01:00
sound ALSA: usb-audio: fix sync-ep altsetting sanity check 2020-01-23 08:22:31 +01:00
tools rseq/selftests: Turn off timeout setting 2020-01-17 19:49:04 +01:00
usr gen_initramfs_list.sh: fix 'bad variable name' error 2020-01-09 10:20:00 +01:00
virt KVM: arm/arm64: Properly handle faulting of device mappings 2019-12-31 16:46:24 +01:00
.clang-format clang-format: Update with the latest for_each macro list 2019-08-31 10:00:51 +02:00
.cocciconfig
.get_maintainer.ignore
.gitattributes
.gitignore Modules updates for v5.4 2019-09-22 10:34:46 -07:00
.mailmap ARM: SoC fixes 2019-11-10 13:41:59 -08:00
COPYING
CREDITS MAINTAINERS: Remove Simon as Renesas SoC Co-Maintainer 2019-10-10 08:12:51 -07:00
Kbuild kbuild: do not descend to ./Kbuild when cleaning 2019-08-21 21:03:58 +09:00
Kconfig
MAINTAINERS MAINTAINERS: Append missed file to the database 2020-01-17 19:48:28 +01:00
Makefile Linux 5.4.13 2020-01-17 19:49:08 +01:00
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.