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[ Upstream commit557d19675a] Syzbot reports an out of bound access in ntfs_trim_fs. The cause of this is using a loop termination condition that compares window index (iw) with wnd->nbits instead of wnd->nwnd, due to which the index used for wnd->free_bits exceeds the size of the array allocated. Fix the loop condition. Fixes:3f3b442b5a("fs/ntfs3: Add bitmap") Link: https://syzkaller.appspot.com/bug?extid=b892240eac461e488d51 Reported-by: syzbot+b892240eac461e488d51@syzkaller.appspotmail.com Signed-off-by: Abdun Nihaal <abdun.nihaal@gmail.com> Signed-off-by: Konstantin Komarov <almaz.alexandrovich@paragon-software.com> Signed-off-by: Sasha Levin <sashal@kernel.org>
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.