[LTS 9.4] net: pktgen: fix access outside of user given buffer in pktgen_thread… #380
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…_write() jira VULN-70913 cve CVE-2025-38061 commit-author Peter Seiderer <[email protected]> commit 425e644 Honour the user given buffer size for the strn_len() calls (otherwise strn_len() will access memory outside of the user given buffer). Signed-off-by: Peter Seiderer <[email protected]> Reviewed-by: Simon Horman <[email protected]> Link: https://patch.msgid.link/[email protected] Signed-off-by: Jakub Kicinski <[email protected]> (cherry picked from commit 425e644) Signed-off-by: Marcin Wcisło <[email protected]>
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[LTS 9.4]
CVE-2025-38061
VULN-70913
Problem
https://lore.kernel.org/linux-cve-announce/2025061835-CVE-2025-38061-caa2@gregkh/T/#u
Applicability: yes (similar as in #376)
See
kernel-src-tree/net/core/pktgen.c
Line 1770 in 8a6224a
kernel-src-tree/net/core/pktgen.c
Line 1800 in 8a6224a
The
countargument is ignored in thestrn_len()calculation.The
CONFIG_NET_PKTGENoption enabling the affected filenet/core/pktgen.cismfor most configuration variants:The module itself is called
pktgenand is used to generate network packets for testing:https://www.kernelconfig.io/CONFIG_NET_PKTGEN?q=CONFIG_NET_PKTGEN&kernelversion=5.15.183&arch=x86
Solution (same as in #376)
Mainline fix in 425e644. Applies to
ciqlts9_4without modifications.kABI check: passed
Boot test: passed
boot-test.log
Kselftests: passed relative
Coverage
All the network-related tests except the unstable ones.
net/forwarding(excepttc_actions.sh,vxlan_bridge_1d_ipv6.sh,ipip_hier_gre_keys.sh,router_bridge_1d_lag.sh,mirror_gre_vlan_bridge_1q.sh,sch_red.sh,dual_vxlan_bridge.sh,tc_police.sh,sch_tbf_ets.sh,sch_tbf_prio.sh,q_in_vni.sh,mirror_gre_bridge_1d_vlan.sh,sch_ets.sh,router_bridge_lag.sh,sch_tbf_root.sh,ip6gre_inner_v6_multipath.sh),net/hsr,net/mptcp(exceptuserspace_pm.sh,simult_flows.sh),net(exceptsrv6_end_flavors_test.sh,fib_nexthops.sh,xfrm_policy.sh,txtimestamp.sh,srv6_end_dt46_l3vpn_test.sh,reuseaddr_conflict,reuseport_addr_any.sh,gro.sh,ip_defrag.sh,srv6_end_dt4_l3vpn_test.sh,udpgro_fwd.sh,srv6_end_dt6_l3vpn_test.sh,udpgso_bench.sh),netfilter(exceptnft_trans_stress.sh)Reference
kselftests–ciqlts9_4–run1.log
Patch
kselftests–ciqlts9_4-CVE-2025-38061–run1.log
Comparison
The reference and patch kernel results are the same.
Specific tests: skipped