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author | valis <sec@valis.email> | 2023-07-29 08:32:02 -0400 |
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committer | mdb:android-git <superproject-auto-update@invalid> | 2023-08-22 07:31:39 +0000 |
commit | 3636061bbeb1f9136cedb77918aa3bfe2b59bb76 (patch) | |
tree | 1baed1442f015262b9944eb0e348151af99f7a90 | |
parent | 66c735920f634265411cb50a947def42fad39c0c (diff) | |
download | superproject-3636061bbeb1f9136cedb77918aa3bfe2b59bb76.tar.gz |
UPSTREAM: net/sched: cls_route: No longer copy tcf_result on update to avoid use-after-free
[ Upstream commit b80b829e9e2c1b3f7aae34855e04d8f6ecaf13c8 ]
When route4_change() is called on an existing filter, the whole
tcf_result struct is always copied into the new instance of the filter.
This causes a problem when updating a filter bound to a class,
as tcf_unbind_filter() is always called on the old instance in the
success path, decreasing filter_cnt of the still referenced class
and allowing it to be deleted, leading to a use-after-free.
Fix this by no longer copying the tcf_result struct from the old filter.
Bug: 296347075
Fixes: 1109c00547fc ("net: sched: RCU cls_route")
Reported-by: valis <sec@valis.email>
Reported-by: Bing-Jhong Billy Jheng <billy@starlabs.sg>
Signed-off-by: valis <sec@valis.email>
Signed-off-by: Jamal Hadi Salim <jhs@mojatatu.com>
Reviewed-by: Victor Nogueira <victor@mojatatu.com>
Reviewed-by: Pedro Tammela <pctammela@mojatatu.com>
Reviewed-by: M A Ramdhan <ramdhan@starlabs.sg>
Link: https://lore.kernel.org/r/20230729123202.72406-4-jhs@mojatatu.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
(cherry picked from commit d4d3b53a4c66004e8e864fea744b3a2b86a73b62)
Signed-off-by: Lee Jones <joneslee@google.com>
Change-Id: Iefbd201b92847ec1349f92c107d7ef5aec3fb359
m--------- | common | 0 |
1 files changed, 0 insertions, 0 deletions
diff --git a/common b/common -Subproject ac4977584ba7b3240436ba6d0c917d1c6ce2da5 +Subproject 6904826e1ac9739626b937fd85e37cf539fec91 |