Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: net_sched: sch_sfq: fix a potential crash on gso_skb handling SFQ has an assumption of always being able to queue at least one packet. However, after the blamed commit, sch->q.len can be inflated by packets in sch->gso_skb, and an enqueue() on an empty SFQ qdisc can be followed by an immediate drop. Fix sfq_drop() to properly clear q->tail in this situation. ip netns add lb ip link add dev to-lb type veth peer name in-lb netns lb ethtool -K to-lb tso off # force qdisc to requeue gso_skb ip netns exec lb ethtool -K in-lb gro on # enable NAPI ip link set dev to-lb up ip -netns lb link set dev in-lb up ip addr add dev to-lb 192.168.20.1/24 ip -netns lb addr add dev in-lb 192.168.20.2/24 tc qdisc replace dev to-lb root sfq limit 100 ip netns exec lb netserver netperf -H 192.168.20.2 -l 100 & netperf -H 192.168.20.2 -l 100 & netperf -H 192.168.20.2 -l 100 & netperf -H 192.168.20.2 -l 100 &
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected a53851e2c3218aa30b77abd6e68cf1c371f15afe before c337efb20d6d9f9bbb4746f6b119917af5c886dc; affected a53851e2c3218aa30b77abd6e68cf1c371f15afe before b44f791f27b14c9eb6b907fbe51f2ba8bec32085; affected a53851e2c3218aa30b77abd6e68cf1c371f15afe before 5814a7fc3abb41f63f2d44c9d3ff9d4e62965b72; affected a53851e2c3218aa30b77abd6e68cf1c371f15afe before 9c19498bdd7cb9d854bd3c54260f71cf7408495e; affected a53851e2c3218aa30b77abd6e68cf1c371f15afe before b4e9bab6011b9559b7c157b16b91ae46d4d8c533; affected a53851e2c3218aa30b77abd6e68cf1c371f15afe before d1bc80da75c789f2f6830df89d91fb2f7a509943; affected a53851e2c3218aa30b77abd6e68cf1c371f15afe before 82448d4dcd8406dec688632a405fdcf7f170ec69; affected a53851e2c3218aa30b77abd6e68cf1c371f15afe before 82ffbe7776d0ac084031f114167712269bf3d832 |
| Linux / Linux | affected 4.16; unaffected 0 before 4.16; unaffected 5.4.295 through 5.4.*; unaffected 5.10.239 through 5.10.*; unaffected 5.15.186 through 5.15.*; unaffected 6.1.142 through 6.1.*; unaffected 6.6.94 through 6.6.*; unaffected 6.12.34 through 6.12.*; unaffected 6.15.3 through 6.15.*; unaffected 6.16 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/c337efb20d6d9f9bbb4746f6b119917af5c886dc
- https://git.kernel.org/stable/c/b44f791f27b14c9eb6b907fbe51f2ba8bec32085
- https://git.kernel.org/stable/c/5814a7fc3abb41f63f2d44c9d3ff9d4e62965b72
- https://git.kernel.org/stable/c/9c19498bdd7cb9d854bd3c54260f71cf7408495e
- https://git.kernel.org/stable/c/b4e9bab6011b9559b7c157b16b91ae46d4d8c533
- https://git.kernel.org/stable/c/d1bc80da75c789f2f6830df89d91fb2f7a509943
- https://git.kernel.org/stable/c/82448d4dcd8406dec688632a405fdcf7f170ec69
- https://git.kernel.org/stable/c/82ffbe7776d0ac084031f114167712269bf3d832
ADP enrichment
No English description supplied.
No English description supplied.
No references supplied.