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Mao Jinlong c9f589923f coresight: tmc-etr: Check if page is valid before dma_map_page() 
commit 1cc573d575 upstream.

alloc_pages_node() return should be checked before calling
dma_map_page() to make sure that valid page is mapped or
else it can lead to aborts as below:

 Unable to handle kernel paging request at virtual address ffffffc008000000
 Mem abort info:
 <snip>...
 pc : __dma_inv_area+0x40/0x58
 lr : dma_direct_map_page+0xd8/0x1c8

 Call trace:
  __dma_inv_area
  tmc_pages_alloc
  tmc_alloc_data_pages
  tmc_alloc_sg_table
  tmc_init_etr_sg_table
  tmc_alloc_etr_buf
  tmc_enable_etr_sink_sysfs
  tmc_enable_etr_sink
  coresight_enable_path
  coresight_enable
  enable_source_store
  dev_attr_store
  sysfs_kf_write

Fixes: 99443ea19e ("coresight: Add generic TMC sg table framework")
Cc: stable@vger.kernel.org
Reviewed-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Signed-off-by: Mao Jinlong <jinlmao@codeaurora.org>
Signed-off-by: Sai Prakash Ranjan <saiprakash.ranjan@codeaurora.org>
Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Link: https://lore.kernel.org/r/20201127175256.1092685-13-mathieu.poirier@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2020-12-30 11:25:48 +01:00
arch ARM: dts: exynos: fix USB 3.0 pins supply being turned off on Odroid XU 2020-12-30 11:25:47 +01:00
block block: factor out requeue handling from dispatch code 2020-12-30 11:25:45 +01:00
certs export.h: remove VMLINUX_SYMBOL() and VMLINUX_SYMBOL_STR() 2018-08-22 23:21:44 +09:00
crypto crypto: algif_skcipher - EBUSY on aio should be an error 2020-10-29 09:55:01 +01:00
Documentation USB: UAS: introduce a quirk to set no_write_same 2020-12-30 11:25:42 +01:00
drivers coresight: tmc-etr: Check if page is valid before dma_map_page() 2020-12-30 11:25:48 +01:00
firmware Fix built-in early-load Intel microcode alignment 2020-01-23 08:21:29 +01:00
fs gfs2: check for empty rgrp tree in gfs2_ri_update 2020-12-11 13:25:04 +01:00
include netfilter: x_tables: Switch synchronization to RCU 2020-12-30 11:25:45 +01:00
init printk: reduce LOG_BUF_SHIFT range for H8300 2020-11-05 11:08:41 +01:00
ipc ipc/util.c: sysvipc_find_ipc() incorrectly updates position index 2020-05-20 08:18:40 +02:00
kernel kernel/cpu: add arch override for clear_tasks_mm_cpumask() mm handling 2020-12-30 11:25:45 +01:00
lib random32: make prandom_u32() output unpredictable 2020-11-18 19:18:52 +01:00
LICENSES LICENSES: Remove CC-BY-SA-4.0 license text 2018-10-18 11:28:50 +02:00
mm mm/swapfile: do not sleep with a spin lock held 2020-12-11 13:25:02 +01:00
net netfilter: x_tables: Switch synchronization to RCU 2020-12-30 11:25:45 +01:00
samples misc: vop: add round_up(x,4) for vring_size to avoid kernel panic 2020-10-30 10:38:29 +01:00
scripts scripts/setlocalversion: make git describe output more reliable 2020-11-05 11:08:31 +01:00
security selinux: Fix error return code in sel_ib_pkey_sid_slow() 2020-11-18 19:18:50 +01:00
sound ALSA: pcm: oss: Fix potential out-of-bounds shift 2020-12-30 11:25:42 +01:00
tools selftests/bpf/test_offload.py: Reset ethtool features after failed setting 2020-12-30 11:25:45 +01:00
usr initramfs: restore default compression behavior 2020-04-13 10:44:59 +02:00
virt KVM: arm64: vgic-v3: Drop the reporting of GICR_TYPER.Last for userspace 2020-12-02 08:48:07 +01:00
.clang-format clang-format: Set IndentWrappedFunctionNames false 2018-08-01 18:38:51 +02:00
.cocciconfig
.get_maintainer.ignore
.gitattributes .gitattributes: set git diff driver for C source code files 2016-10-07 18:46:30 -07:00
.gitignore Kbuild updates for v4.17 (2nd) 2018-04-15 17:21:30 -07:00
.mailmap libnvdimm-for-4.19_misc 2018-08-25 18:13:10 -07:00
COPYING COPYING: use the new text with points to the license files 2018-03-23 12:41:45 -06:00
CREDITS 9p: remove Ron Minnich from MAINTAINERS 2018-08-17 16:20:26 -07:00
Kbuild Kbuild updates for v4.15 2017-11-17 17:45:29 -08:00
Kconfig kconfig: move the "Executable file formats" menu to fs/Kconfig.binfmt 2018-08-02 08:06:55 +09:00
MAINTAINERS Documentation/llvm: add documentation on building w/ Clang/LLVM 2020-09-26 18:01:31 +02:00
Makefile Kbuild: do not emit debug info for assembly with LLVM_IAS=1 2020-12-30 11:25:37 +01:00
README Docs: Added a pointer to the formatted docs to README 2018-03-21 09:02:53 -06:00

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.
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.