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Jarkko Sakkinen aa5c3aa3f1 x86/sgx: Do not fail on incomplete sanitization on premature stop of ksgxd 
commit 133e049a3f upstream.

Unsanitized pages trigger WARN_ON() unconditionally, which can panic the
whole computer, if /proc/sys/kernel/panic_on_warn is set.

In sgx_init(), if misc_register() fails or misc_register() succeeds but
neither sgx_drv_init() nor sgx_vepc_init() succeeds, then ksgxd will be
prematurely stopped. This may leave unsanitized pages, which will result a
false warning.

Refine __sgx_sanitize_pages() to return:

1. Zero when the sanitization process is complete or ksgxd has been
   requested to stop.
2. The number of unsanitized pages otherwise.

Fixes: 51ab30eb2a ("x86/sgx: Replace section->init_laundry_list with sgx_dirty_page_list")
Reported-by: Paul Menzel <pmenzel@molgen.mpg.de>
Signed-off-by: Jarkko Sakkinen <jarkko@kernel.org>
Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com>
Reviewed-by: Reinette Chatre <reinette.chatre@intel.com>
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/linux-sgx/20220825051827.246698-1-jarkko@kernel.org/T/#u
Link: https://lkml.kernel.org/r/20220906000221.34286-2-jarkko@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2022-10-05 10:39:37 +02:00
arch x86/sgx: Do not fail on incomplete sanitization on premature stop of ksgxd 2022-10-05 10:39:37 +02:00
block block: blk_queue_enter() / __bio_queue_enter() must return -EAGAIN for nowait 2022-09-23 14:15:48 +02:00
certs certs/blacklist_hashes.c: fix const confusion in certs blacklist 2022-06-22 14:22:01 +02:00
crypto KEYS: asymmetric: enforce SM2 signature use pkey algo 2022-08-17 14:24:28 +02:00
Documentation Input: iforce - add support for Boeder Force Feedback Wheel 2022-09-20 12:39:45 +02:00
drivers clk: ingenic-tcu: Properly enable registers before accessing timers 2022-10-05 10:39:37 +02:00
fs ext4: use locality group preallocation for small closed files 2022-09-28 11:11:58 +02:00
include serial: Create uart_xmit_advance() 2022-09-28 11:11:54 +02:00
init stack: Declare {randomize_,}kstack_offset to fix Sparse warnings 2022-08-17 14:23:10 +02:00
ipc ipc/mqueue: use get_tree_nodev() in mqueue_get_tree() 2022-06-09 10:23:10 +02:00
kernel cgroup: cgroup_get_from_id() must check the looked-up kn is a directory 2022-10-05 10:39:36 +02:00
lib crypto: lib - remove unneeded selection of XOR_BLOCKS 2022-09-05 10:30:03 +02:00
LICENSES
mm mm: slub: fix flush_cpu_slab()/__free_slab() invocations in task context. 2022-09-28 11:11:44 +02:00
net net: sched: fix possible refcount leak in tc_new_tfilter() 2022-09-28 11:11:53 +02:00
samples samples/landlock: Format with clang-format 2022-06-09 10:23:23 +02:00
scripts mksysmap: Fix the mismatch of 'L0' symbols in System.map 2022-09-23 14:15:51 +02:00
security apparmor: Fix memleak in aa_simple_write_to_buffer() 2022-08-25 11:40:01 +02:00
sound ALSA: hda/realtek: fix speakers and micmute on HP 855 G8 2022-10-05 10:39:35 +02:00
tools selftests: forwarding: add shebang for sch_red.sh 2022-09-28 11:11:54 +02:00
usr usr/include/Makefile: add linux/nfc.h to the compile-test coverage 2022-02-01 17:27:15 +01:00
virt KVM: SEV: add cache flush to solve SEV cache incoherency issues 2022-09-23 14:15:52 +02:00
.clang-format
.cocciconfig
.get_maintainer.ignore
.gitattributes
.gitignore
.mailmap mailmap: add Andrej Shadura 2021-10-18 20:22:03 -10:00
COPYING
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Kconfig
MAINTAINERS Input: goodix - add a goodix.h header file 2022-07-12 16:34:51 +02:00
Makefile Linux 5.15.71 2022-09-28 11:11:58 +02:00
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.