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When dumping the unconfirmed lists, the cpu that is processing the ct
entry can reallocate ct->ext at any time.
Right now accessing the extensions from another CPU is ok provided
we're holding rcu read lock: extension reallocation does use rcu.
Once RCU isn't used anymore this becomes unsafe, so skip extensions for
the unconfirmed list.
Dumping the extension area for confirmed or dying conntracks is fine:
no reallocations are allowed and list iteration holds appropriate
locks that prevent ct (and this ct->ext) from getting free'd.
v2: fix compiler warnings due to misue of 'const' and missing return
statement (kbuild robot).
Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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| certs | ||
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| Documentation | ||
| drivers | ||
| fs | ||
| include | ||
| init | ||
| ipc | ||
| kernel | ||
| lib | ||
| LICENSES | ||
| mm | ||
| net | ||
| samples | ||
| scripts | ||
| security | ||
| sound | ||
| tools | ||
| usr | ||
| virt | ||
| .clang-format | ||
| .cocciconfig | ||
| .get_maintainer.ignore | ||
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| 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.