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101e596e74
A previous commit changed the logic around how SQ entries are iterated,
and as a result, had a few bugs. One is that it fully trusts the SQ
head and tail, which are user exposed. Another is that it fails to
increment the SQ head if the SQ index is out of range.
Fix both of those up, reverting to the previous logic of how to
iterate SQ entries.
Link: https://lore.kernel.org/io-uring/68ffdf18.050a0220.3344a1.039e.GAE@google.com/
Fixes: 1cba30bf9f ("io_uring: add support for IORING_SETUP_SQE_MIXED")
Reported-by: syzbot+10a9b495f54a17b607a6@syzkaller.appspotmail.com
Tested-by: syzbot+10a9b495f54a17b607a6@syzkaller.appspotmail.com
Reviewed-by: Keith Busch <kbusch@kernel.org>
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 reStructuredText 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.