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Jens Axboe 09bb839434 io_uring: fix fget/fput handling 
This isn't a straight port of commit 84c4e1f89f for aio.c, since
io_uring doesn't use files in exactly the same way. But it's pretty
close. See the commit message for that commit.

This essentially fixes a use-after-free with the poll command
handling, but it takes cue from Linus's approach to just simplifying
the file handling. We move the setup of the file into a higher level
location, so the individual commands don't have to deal with it. And
then we release the reference when we free the associated io_kiocb.

Fixes: 221c5eb233 ("io_uring: add support for IORING_OP_POLL")
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2019-03-15 11:17:05 -06:00
arch Merge branch 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2019-03-10 15:22:03 -07:00
block
certs
crypto
Documentation Merge branch 'core-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2019-03-10 13:46:08 -07:00
drivers platform-drivers-x86 for v5.1-1 2019-03-10 13:16:37 -07:00
fs io_uring: fix fget/fput handling 2019-03-15 11:17:05 -06:00
include Merge branch 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2019-03-10 14:46:56 -07:00
init Merge branch 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2019-03-10 13:58:33 -07:00
ipc
kernel Merge branch 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2019-03-10 15:22:03 -07:00
lib DMA mapping updates for 5.1 2019-03-10 11:54:48 -07:00
LICENSES
mm
net
samples
scripts platform-drivers-x86 for v5.1-1 2019-03-10 13:16:37 -07:00
security
sound
tools Merge branch 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2019-03-10 15:22:03 -07:00
usr
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.cocciconfig
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MAINTAINERS platform-drivers-x86 for v5.1-1 2019-03-10 13:16:37 -07:00
Makefile
README

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.