[ciqlts9_6] net: ipv6: clear suppressed fib6 rule result - #1563
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jira VULN-204226 cve CVE-2026-74581 commit-author Zhiling Zou <zhilinz@nebusec.ai> commit 6aea62e fib6_rule_suppress() drops a suppressed route with ip6_rt_put_flags(), but leaves res->rt6 pointing at the released rt6_info. If no later rule supplies a replacement, fib6_rule_lookup() still sees res.rt6 and returns that stale dst to its caller. A suppressing rule can therefore leak a released route back to rt6_lookup(), and the next put hits rcuref_put_slowpath() from dst_release(). Clear res->rt6 when suppressing the route so suppressed lookups fall through to the null dst instead of reusing the released one. Fixes: cdef485 ("ipv6: fix memory leak in fib6_rule_suppress") Cc: stable@vger.kernel.org Reported-by: Vega <vega@nebusec.ai> Signed-off-by: Zhiling Zou <zhilinz@nebusec.ai> Signed-off-by: Ren Wei <enjou1224z@gmail.com> Reviewed-by: Ido Schimmel <idosch@nvidia.com> Link: https://patch.msgid.link/4b8acb7787d54e440155585dd32ebdf0bef7d122.1784710966.git.zhilinz@nebusec.ai Signed-off-by: Jakub Kicinski <kuba@kernel.org> (cherry picked from commit 6aea62e) Signed-off-by: Shreeya Patel <spatel@ciq.com>
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