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The Coverity Scan service has detected potential race conditions in ceph_block_o_direct(), ceph_start_io_read(), ceph_block_buffered(), and ceph_start_io_direct() [1 - 4]. The CID 1590942, 1590665, 1589664, 1590377 contain explanation: "The value of the shared data will be determined by the interleaving of thread execution. Thread shared data is accessed without holding an appropriate lock, possibly causing a race condition (CWE-366)". This patch reworks the pattern of accessing/modification of CEPH_I_ODIRECT flag by means of adding smp_mb__before_atomic() before reading the status of CEPH_I_ODIRECT flag and smp_mb__after_atomic() after clearing set/clear this flag. Also, it was reworked the pattern of using of ci->i_ceph_lock in ceph_block_o_direct(), ceph_start_io_read(), ceph_block_buffered(), and ceph_start_io_direct() methods. [1] https://scan5.scan.coverity.com/#/project-view/64304/10063?selectedIssue=1590942 [2] https://scan5.scan.coverity.com/#/project-view/64304/10063?selectedIssue=1590665 [3] https://scan5.scan.coverity.com/#/project-view/64304/10063?selectedIssue=1589664 [4] https://scan5.scan.coverity.com/#/project-view/64304/10063?selectedIssue=1590377 Signed-off-by: Viacheslav Dubeyko <Slava.Dubeyko@ibm.com> Reviewed-by: Alex Markuze <amarkuze@redhat.com> Signed-off-by: Ilya Dryomov <idryomov@gmail.com> |
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| certs | ||
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| Documentation | ||
| drivers | ||
| fs | ||
| include | ||
| init | ||
| io_uring | ||
| ipc | ||
| kernel | ||
| lib | ||
| LICENSES | ||
| mm | ||
| net | ||
| rust | ||
| samples | ||
| scripts | ||
| security | ||
| sound | ||
| tools | ||
| usr | ||
| virt | ||
| .clang-format | ||
| .clippy.toml | ||
| .cocciconfig | ||
| .editorconfig | ||
| .get_maintainer.ignore | ||
| .gitattributes | ||
| .gitignore | ||
| .mailmap | ||
| .pylintrc | ||
| .rustfmt.toml | ||
| COPYING | ||
| CREDITS | ||
| Kbuild | ||
| Kconfig | ||
| MAINTAINERS | ||
| Makefile | ||
| 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 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.