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| Filename | Latest commit message | Latest commit date |
|---|---|---|
516bd00e5a
commit 2f941622fd88328ca75806c45c9e9709286a0609 upstream.
WARNING: CPU: 1 PID: 16059 at lib/refcount.c:31 refcount_warn_saturate+0xdf/0xf
[..]
__nft_mt_tg_destroy+0x42/0x50 [nft_compat]
nft_target_destroy+0x63/0x80 [nft_compat]
nf_tables_expr_destroy+0x1b/0x30 [nf_tables]
nf_tables_rule_destroy+0x3a/0x70 [nf_tables]
nf_tables_exit_net+0x186/0x3d0 [nf_tables]
Happens when a compat expr is destoyed from abort path.
There is no functional impact; after this work queue is flushed
unconditionally if its pending.
This removes the waitcount optimization. Test of repeated
iptables-restore of a ~60k kubernetes ruleset doesn't indicate
a slowdown. In case the counter is needed after all for some workloads
we can revert this and increment the refcount for the
!= NFT_PREPARE_TRANS case to avoid the increment/decrement imbalance.
While at it, also flush for match case, this was an oversight
in the original patch.
Fixes: ffe8923f109b7e ("netfilter: nft_compat: make sure xtables destructors have run")
Reported-by: kernel test robot <rong.a.chen@intel.com>
Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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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.