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f31e5f1a89
Now it's doing cleanup_entry for oldinfo under the xt_table lock, but it's not really necessary. After the replacement job is done in xt_replace_table, oldinfo is not used elsewhere any more, and it can be freed without xt_table lock safely. The important thing is that rtnl_lock is called in some xt_target destroy, which means rtnl_lock, a big lock is used in xt_table lock, a smaller one. It usually could be the reason why a dead lock may happen. Besides, all xt_target/match checkentry is called out of xt_table lock. It's better also to move all cleanup_entry calling out of xt_table lock, just as do_replace_finish does for ebtables. Signed-off-by: Xin Long <lucien.xin@gmail.com> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org> |
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Linux kernel ============ This file was moved to Documentation/admin-guide/README.rst Please notice that there are several guides for kernel developers and users. These guides can be rendered in a number of formats, like HTML and PDF. In order to build the documentation, use ``make htmldocs`` or ``make pdfdocs``. There are various text files in the Documentation/ subdirectory, several of them using the Restructured Text markup notation. See Documentation/00-INDEX for a list of what is contained in each file. 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.