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Pablo Neira Ayuso says: ==================== Netfilter fixes for net The following patchset contains a rather large update with Netfilter fixes, specifically targeted to incorrect RCU usage in several spots and the userspace conntrack helper infrastructure (nfnetlink_cthelper), more specifically they are: 1) expect_class_max is incorrect set via cthelper, as in kernel semantics mandate that this represents the array of expectation classes minus 1. Patch from Liping Zhang. 2) Expectation policy updates via cthelper are currently broken for several reasons: This code allows illegal changes in the policy such as changing the number of expeciation classes, it is leaking the updated policy and such update occurs with no RCU protection at all. Fix this by adding a new nfnl_cthelper_update_policy() that describes what is really legal on the update path. 3) Fix several memory leaks in cthelper, from Jeffy Chen. 4) synchronize_rcu() is missing in the removal path of several modules, this may lead to races since CPU may still be running on code that has just gone. Also from Liping Zhang. 5) Don't use the helper hashtable from cthelper, it is not safe to walk over those bits without the helper mutex. Fix this by introducing a new independent list for userspace helpers. From Liping Zhang. 6) nf_ct_extend_unregister() needs synchronize_rcu() to make sure no packets are walking on any conntrack extension that is gone after module removal, again from Liping. 7) nf_nat_snmp may crash if we fail to unregister the helper due to accidental leftover code, from Gao Feng. 8) Fix leak in nfnetlink_queue with secctx support, from Liping Zhang. ==================== Signed-off-by: David S. Miller <davem@davemloft.net> |
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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.