Sabrina Dubroca 629ec78ef8 mpls: add seqcount to protect the platform_label{,s} pair ... The RCU-protected codepaths (mpls_forward, mpls_dump_routes) can have an inconsistent view of platform_labels vs platform_label in case of a concurrent resize (resize_platform_label_table, under platform_mutex). This can lead to OOB accesses. This patch adds a seqcount, so that we get a consistent snapshot. Note that mpls_label_ok is also susceptible to this, so the check against RTA_DST in rtm_to_route_config, done outside platform_mutex, is not sufficient. This value gets passed to mpls_label_ok once more in both mpls_route_add and mpls_route_del, so there is no issue, but that additional check must not be removed. Reported-by: Yuan Tan <tanyuan98@outlook.com> Reported-by: Yifan Wu <yifanwucs@gmail.com> Reported-by: Juefei Pu <tomapufckgml@gmail.com> Reported-by: Xin Liu <bird@lzu.edu.cn> Fixes: 7720c01f3f ("mpls: Add a sysctl to control the size of the mpls label table") Fixes: dde1b38e87 ("mpls: Convert mpls_dump_routes() to RCU.") Signed-off-by: Sabrina Dubroca <sd@queasysnail.net> Link: https://patch.msgid.link/cd8fca15e3eb7e212b094064cd83652e20fd9d31.1774284088.git.sd@queasysnail.net Signed-off-by: Jakub Kicinski <kuba@kernel.org>		2026-03-26 18:32:14 -07:00
..
Kconfig	treewide: replace '---help---' in Kconfig files with 'help'	2020-06-14 01:57:21 +09:00
Makefile	treewide: Add SPDX license identifier - Makefile/Kconfig	2019-05-21 10:50:46 +02:00
af_mpls.c	mpls: add seqcount to protect the platform_label{,s} pair	2026-03-26 18:32:14 -07:00
internal.h	mpls: Protect net->mpls.platform_label with a per-netns mutex.	2025-11-03 17:40:53 -08:00
mpls_gso.c	- Kuan-Wei Chiu has developed the well-named series "lib min_heap: Min	2024-03-14 18:03:09 -07:00
mpls_iptunnel.c	mpls: Add mpls_dev_rcu().	2025-11-03 17:40:48 -08:00