linux-stable

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Joao Martins d08af0a596 mm/hugetlb: fix refs calculation from unaligned @vaddr Commit `82e5d378b0` ("mm/hugetlb: refactor subpage recording") refactored the count of subpages but missed an edge case when @vaddr is not aligned to PAGE_SIZE e.g. when close to vma->vm_end. It would then errousnly set @refs to 0 and record_subpages_vmas() wouldn't set the @pages array element to its value, consequently causing the reported null-deref by syzbot. Fix it by aligning down @vaddr by PAGE_SIZE in @refs calculation. Link: https://lkml.kernel.org/r/20210713152440.28650-1-joao.m.martins@oracle.com Fixes: `82e5d378b0` ("mm/hugetlb: refactor subpage recording") Reported-by: syzbot+a3fcd59df1b372066f5a@syzkaller.appspotmail.com Signed-off-by: Joao Martins <joao.m.martins@oracle.com> Reviewed-by: Mike Kravetz <mike.kravetz@oracle.com> Cc: <stable@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>		2021-07-15 10:13:49 -07:00
arch	Two fixes:	2021-07-11 11:17:57 -07:00
block
certs
crypto
Documentation	RTC for 5.14	2021-07-10 16:19:10 -07:00
drivers	sd: don't mess with SD_MINORS for CONFIG_DEBUG_BLOCK_EXT_DEVT	2021-07-12 12:25:37 -07:00
fs	hfs: add lock nesting notation to hfs_find_init	2021-07-15 10:13:49 -07:00
include	mm: fix the try_to_unmap prototype for !CONFIG_MMU	2021-07-15 10:13:49 -07:00
init
ipc
kernel	Two fixes:	2021-07-11 11:17:57 -07:00
lib	lib/test_hmm: remove set but unused page variable	2021-07-15 10:13:49 -07:00
LICENSES
mm	mm/hugetlb: fix refs calculation from unaligned @vaddr	2021-07-15 10:13:49 -07:00
net
samples
scripts
security
sound
tools	perf tools changes for v5.14: 2nd batch	2021-07-11 10:54:24 -07:00
usr
virt
.clang-format
.cocciconfig
.get_maintainer.ignore
.gitattributes
.gitignore
.mailmap
COPYING
CREDITS
Kbuild
Kconfig
MAINTAINERS	SCSI misc on 20210711	2021-07-11 10:59:53 -07:00
Makefile	Linux 5.14-rc1	2021-07-11 15:07:40 -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.

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.