355e8d26f7
Opening and closing an io_uring instance leaks a UNIX domain socket inode. This is because the ->file of the io_uring instance's internal UNIX domain socket is set to point to the io_uring file, but then sock_release() sees the non-NULL ->file and assumes the inode reference is held by the file so doesn't call iput(). That's not the case here, since the reference is still meant to be held by the socket; the actual inode of the io_uring file is different. Fix this leak by NULL-ing out ->file before releasing the socket. Reported-by: syzbot+111cb28d9f583693aefa@syzkaller.appspotmail.com Fixes: 2b188cc1bb85 ("Add io_uring IO interface") Cc: <stable@vger.kernel.org> # v5.1+ Signed-off-by: Eric Biggers <ebiggers@google.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>
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.