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Niklas Cassel 4d643b6608 blk-zoned: allow BLKREPORTZONE without CAP_SYS_ADMIN
A user space process should not need the CAP_SYS_ADMIN capability set
in order to perform a BLKREPORTZONE ioctl.

Getting the zone report is required in order to get the write pointer.
Neither read() nor write() requires CAP_SYS_ADMIN, so it is reasonable
that a user space process that can read/write from/to the device, also
can get the write pointer. (Since e.g. writes have to be at the write
pointer.)

Fixes: 3ed05a987e ("blk-zoned: implement ioctls")
Signed-off-by: Niklas Cassel <niklas.cassel@wdc.com>
Reviewed-by: Damien Le Moal <damien.lemoal@wdc.com>
Reviewed-by: Aravind Ramesh <aravind.ramesh@wdc.com>
Reviewed-by: Adam Manzanares <a.manzanares@samsung.com>
Reviewed-by: Himanshu Madhani <himanshu.madhani@oracle.com>
Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Cc: stable@vger.kernel.org # v4.10+
Link: https://lore.kernel.org/r/20210811110505.29649-3-Niklas.Cassel@wdc.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2021-08-24 10:12:36 -06:00
Documentation block: export diskseq in sysfs 2021-08-02 13:37:28 -06:00
LICENSES
arch block: remove CONFIG_DEBUG_BLOCK_EXT_DEVT 2021-08-24 06:42:40 -06:00
block blk-zoned: allow BLKREPORTZONE without CAP_SYS_ADMIN 2021-08-24 10:12:36 -06:00
certs
crypto
drivers mmc: sdhci-tegra: Enable MMC_CAP2_ALT_GPT_TEGRA 2021-08-24 10:09:06 -06:00
fs block: mark blkdev_fsync static 2021-08-24 10:10:33 -06:00
include block: mark blkdev_fsync static 2021-08-24 10:10:33 -06:00
init block: remove CONFIG_DEBUG_BLOCK_EXT_DEVT 2021-08-24 06:42:40 -06:00
ipc
kernel Networking fixes for 5.14-rc4, including fixes from bpf, can, WiFi (mac80211) 2021-07-30 16:01:36 -07:00
lib block: remove CONFIG_DEBUG_BLOCK_EXT_DEVT 2021-08-24 06:42:40 -06:00
mm mm: hide laptop_mode_wb_timer entirely behind the BDI API 2021-08-09 11:52:28 -06:00
net Networking fixes for 5.14-rc4, including fixes from bpf, can, WiFi (mac80211) 2021-07-30 16:01:36 -07:00
samples
scripts
security
sound
tools perf tools fixes for v5.14: 2nd batch 2021-08-01 12:25:30 -07:00
usr
virt
.clang-format
.cocciconfig
.get_maintainer.ignore
.gitattributes
.gitignore
.mailmap
COPYING
CREDITS
Kbuild
Kconfig
MAINTAINERS Networking fixes for 5.14-rc4, including fixes from bpf, can, WiFi (mac80211) 2021-07-30 16:01:36 -07:00
Makefile Linux 5.14-rc4 2021-08-01 17:04:17 -07:00
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.