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Roberto Sassu 9bac4a2b73 memfd: check for non-NULL file_seals in memfd_create() syscall 
[ Upstream commit 935d44acf6 ]

Ensure that file_seals is non-NULL before using it in the memfd_create()
syscall.  One situation in which memfd_file_seals_ptr() could return a
NULL pointer when CONFIG_SHMEM=n, oopsing the kernel.

Link: https://lkml.kernel.org/r/20230607132427.2867435-1-roberto.sassu@huaweicloud.com
Fixes: 47b9012ecd ("shmem: add sealing support to hugetlb-backed memfd")
Signed-off-by: Roberto Sassu <roberto.sassu@huawei.com>
Cc: Marc-Andr Lureau <marcandre.lureau@redhat.com>
Cc: Mike Kravetz <mike.kravetz@oracle.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2023-06-28 10:29:45 +02:00
arch x86/mm: Avoid using set_pgd() outside of real PGD pages 2023-06-28 10:29:45 +02:00
block
certs
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Documentation
drivers regmap: spi-avmm: Fix regmap_bus max_raw_write 2023-06-28 10:29:44 +02:00
fs nilfs2: prevent general protection fault in nilfs_clear_dirty_page() 2023-06-28 10:29:45 +02:00
include writeback: fix dereferencing NULL mapping->host on writeback_page_template 2023-06-28 10:29:44 +02:00
init
io_uring io_uring/net: disable partial retries for recvmsg with cmsg 2023-06-28 10:29:44 +02:00
ipc
kernel cgroup: Do not corrupt task iteration when rebinding subsystem 2023-06-28 10:29:43 +02:00
lib
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mm memfd: check for non-NULL file_seals in memfd_create() syscall 2023-06-28 10:29:45 +02:00
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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.