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Anant Thazhemadam f5d4e47871 fs: quota: fix array-index-out-of-bounds bug by passing correct argument to vfs_cleanup_quota_inode() 
commit e51d68e76d upstream.

When dquot_resume() was last updated, the argument that got passed
to vfs_cleanup_quota_inode was incorrectly set.

If type = -1 and dquot_load_quota_sb() returns a negative value,
then vfs_cleanup_quota_inode() gets called with -1 passed as an
argument, and this leads to an array-index-out-of-bounds bug.

Fix this issue by correctly passing the arguments.

Fixes: ae45f07d47 ("quota: Simplify dquot_resume()")
Link: https://lore.kernel.org/r/20201208194338.7064-1-anant.thazhemadam@gmail.com
Reported-by: syzbot+2643e825238d7aabb37f@syzkaller.appspotmail.com
Tested-by: syzbot+2643e825238d7aabb37f@syzkaller.appspotmail.com
CC: stable@vger.kernel.org
Signed-off-by: Anant Thazhemadam <anant.thazhemadam@gmail.com>
Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
History 2020-12-26 16:02:45 +01:00
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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.