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Jens Axboe 5b0bbee473 io_uring: statx must grab the file table for valid fd
Clay reports that OP_STATX fails for a test case with a valid fd
and empty path:

 -- Test 0: statx:fd 3: SUCCEED, file mode 100755
 -- Test 1: statx:path ./uring_statx: SUCCEED, file mode 100755
 -- Test 2: io_uring_statx:fd 3: FAIL, errno 9: Bad file descriptor
 -- Test 3: io_uring_statx:path ./uring_statx: SUCCEED, file mode 100755

This is due to statx not grabbing the process file table, hence we can't
lookup the fd in async context. If the fd is valid, ensure that we grab
the file table so we can grab the file from async context.

Cc: stable@vger.kernel.org # v5.6
Reported-by: Clay Harris <bugs@claycon.org>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2020-04-27 10:41:22 -06:00
arch Merge branch 'akpm' (patches from Andrew) 2020-04-10 17:57:48 -07:00
block block-5.7-2020-04-10 2020-04-10 10:06:54 -07:00
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Documentation Merge branch 'akpm' (patches from Andrew) 2020-04-10 17:57:48 -07:00
drivers Merge branch 'akpm' (patches from Andrew) 2020-04-10 17:57:48 -07:00
fs io_uring: statx must grab the file table for valid fd 2020-04-27 10:41:22 -06:00
include Merge branch 'akpm' (patches from Andrew) 2020-04-10 17:57:48 -07:00
init printk: queue wake_up_klogd irq_work only if per-CPU areas are ready 2020-04-10 13:18:57 -07:00
ipc ipc/util.c: sysvipc_find_ipc() should increase position index 2020-04-10 15:36:22 -07:00
kernel Merge branch 'akpm' (patches from Andrew) 2020-04-10 17:57:48 -07:00
lib libnvdimm for 5.7 2020-04-08 21:03:40 -07:00
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net The main items are: 2020-04-08 21:44:05 -07:00
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scripts ubsan: split "bounds" checker from other options 2020-04-07 10:43:44 -07:00
security Keyrings fixes 2020-04-04 12:24:47 -07:00
sound sound fixes for 5.7-rc1 2020-04-10 12:27:06 -07:00
tools change email address for Pali Rohár 2020-04-10 15:36:22 -07:00
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virt KVM: Pass kvm_init()'s opaque param to additional arch funcs 2020-03-31 10:48:03 -04:00
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Kbuild kbuild: rename hostprogs-y/always to hostprogs/always-y 2020-02-04 01:53:07 +09:00
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README Drop all 00-INDEX files from Documentation/ 2018-09-09 15:08:58 -06:00

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.