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da05cecc49
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Firo Yang da05cecc49 sctp: sysctl: make extra pointers netns aware 
Recently, a customer reported that from their container whose
net namespace is different to the host's init_net, they can't set
the container's net.sctp.rto_max to any value smaller than
init_net.sctp.rto_min.

For instance,
Host:
sudo sysctl net.sctp.rto_min
net.sctp.rto_min = 1000

Container:
echo 100 > /mnt/proc-net/sctp/rto_min
echo 400 > /mnt/proc-net/sctp/rto_max
echo: write error: Invalid argument

This is caused by the check made from this'commit 4f3fdf3bc5
("sctp: add check rto_min and rto_max in sysctl")'
When validating the input value, it's always referring the boundary
value set for the init_net namespace.

Having container's rto_max smaller than host's init_net.sctp.rto_min
does make sense. Consider that the rto between two containers on the
same host is very likely smaller than it for two hosts.

So to fix this problem, as suggested by Marcelo, this patch makes the
extra pointers of rto_min, rto_max, pf_retrans, and ps_retrans point
to the corresponding variables from the newly created net namespace while
the new net namespace is being registered in sctp_sysctl_net_register.

Fixes: 4f3fdf3bc5 ("sctp: add check rto_min and rto_max in sysctl")
Reviewed-by: Marcelo Ricardo Leitner <marcelo.leitner@gmail.com>
Reviewed-by: Jakub Kicinski <kuba@kernel.org>
Acked-by: Marcelo Ricardo Leitner <marcelo.leitner@gmail.com>
Signed-off-by: Firo Yang <firo.yang@suse.com>
Link: https://lore.kernel.org/r/20221209054854.23889-1-firo.yang@suse.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2022-12-12 12:57:29 -08:00
arch bpf-next-for-netdev 2022-12-12 11:27:42 -08:00
block
certs
crypto
Documentation bpf-next-for-netdev 2022-12-12 11:27:42 -08:00
drivers net: ethernet: ti: am65-cpsw: Fix PM runtime leakage in am65_cpsw_nuss_ndo_slave_open() 2022-12-12 12:52:28 -08:00
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include bpf-next-for-netdev 2022-12-12 11:27:42 -08:00
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kernel bpf-next-for-netdev 2022-12-12 11:27:42 -08:00
lib rhashtable: Allow rhashtable to be used from irq-safe contexts 2022-12-09 10:42:56 +00:00
LICENSES
mm memcg: Fix possible use-after-free in memcg_write_event_control() 2022-12-08 10:40:58 -08:00
net sctp: sysctl: make extra pointers netns aware 2022-12-12 12:57:29 -08:00
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scripts bpf: Rework process_dynptr_func 2022-12-08 18:25:31 -08:00
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MAINTAINERS Documentation: devlink: add devlink documentation for the etas_es58x driver 2022-12-12 11:39:13 +01:00
Makefile
README

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.