net: ipv6: fix dst refleaks in rpl, seg6 and ioam6 lwtunnels

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commit c71a192976 upstream.

dst_cache_get() gives us a reference, we need to release it.

Discovered by the ioam6.sh test, kmemleak was recently fixed
to catch per-cpu memory leaks.

Fixes: 985ec6f5e6 ("net: ipv6: rpl_iptunnel: mitigate 2-realloc issue")
Fixes: 40475b6376 ("net: ipv6: seg6_iptunnel: mitigate 2-realloc issue")
Fixes: dce525185b ("net: ipv6: ioam6_iptunnel: mitigate 2-realloc issue")
Reviewed-by: Justin Iurman <justin.iurman@uliege.be>
Reviewed-by: Simon Horman <horms@kernel.org>
Link: https://patch.msgid.link/20250130031519.2716843-1-kuba@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

...

This commit is contained in:

Jakub Kicinski 2025-01-29 19:15:18 -08:00 • committed by Greg Kroah-Hartman

parent 02e4373593

commit bf500b0d0c

2 changed files with 8 additions and 4 deletions

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6

net/ipv6/rpl_iptunnel.c

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6

net/ipv6/seg6_iptunnel.c

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