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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
Documentation	RTC for 5.14	2021-07-10 16:19:10 -07:00
LICENSES	LICENSES: Add the CC-BY-4.0 license	2020-12-08 10:33:27 -07:00
arch	Two fixes:	2021-07-11 11:17:57 -07:00
block	block-5.14-2021-07-08	2021-07-09 12:05:33 -07:00
certs	Kbuild updates for v5.13 (2nd)	2021-05-08 10:00:11 -07:00
crypto	Merge branch 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6	2021-07-09 11:00:44 -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	Kbuild updates for v5.14	2021-07-10 11:01:38 -07:00
ipc	Merge branch 'akpm' (patches from Andrew)	2021-07-02 12:08:10 -07:00
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
mm	mm/hugetlb: fix refs calculation from unaligned @vaddr	2021-07-15 10:13:49 -07:00
net	We have new filesystem client metrics for reporting I/O sizes from	2021-07-09 09:52:13 -07:00
samples	VFIO update for v5.14-rc1	2021-07-03 11:49:33 -07:00
scripts	Kbuild updates for v5.14	2021-07-10 11:01:38 -07:00
security	asm-generic/unaligned: Unify asm/unaligned.h around struct helper	2021-07-02 12:43:40 -07:00
sound	sound fixes for 5.14-rc1	2021-07-09 11:40:26 -07:00
tools	perf tools changes for v5.14: 2nd batch	2021-07-11 10:54:24 -07:00
usr	.gitignore: prefix local generated files with a slash	2021-05-02 00:43:35 +09:00
virt	Merge branch 'akpm' (patches from Andrew)	2021-06-29 17:29:11 -07:00
.clang-format	clang-format: Update with the latest for_each macro list	2021-05-12 23:32:39 +02:00
.cocciconfig	…
.get_maintainer.ignore	…
.gitattributes	…
.gitignore	.gitignore: ignore only top-level modules.builtin	2021-05-02 00:43:35 +09:00
.mailmap	m68k updates for v5.14	2021-06-28 14:01:03 -07:00
COPYING	…
CREDITS	MAINTAINERS: move Murali Karicheri to credits	2021-04-29 15:47:30 -07:00
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.