mirror of
https://github.com/hardkernel/linux.git
synced 2026-06-05 02:21:52 +09:00
4bb1a53be8
syzbot is reporting use of uninitialized spinlock at gsmld_write() [1], for commit32dd59f969("tty: n_gsm: fix race condition in gsmld_write()") allows accessing gsm->tx_lock before gsm_activate_mux() initializes it. Since object initialization should be done right after allocation in order to avoid accessing uninitialized memory, move initialization of timer/work/waitqueue/spinlock from gsmld_open()/gsm_activate_mux() to gsm_alloc_mux(). Link: https://syzkaller.appspot.com/bug?extid=cf155def4e717db68a12 [1] Fixes:32dd59f969("tty: n_gsm: fix race condition in gsmld_write()") Reported-by: syzbot <syzbot+cf155def4e717db68a12@syzkaller.appspotmail.com> Tested-by: syzbot <syzbot+cf155def4e717db68a12@syzkaller.appspotmail.com> Cc: stable <stable@kernel.org> Acked-by: Jiri Slaby <jirislaby@kernel.org> Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> Link: https://lore.kernel.org/r/2110618e-57f0-c1ce-b2ad-b6cacef3f60e@I-love.SAKURA.ne.jp Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.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.