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| author | Eric Dumazet <edumazet@google.com> | 2018-10-02 15:47:35 -0700 |
|---|---|---|
| committer | Moyster <oysterized@gmail.com> | 2019-05-03 19:24:03 +0200 |
| commit | e769e2311aee9f3d0f40bc379fb8499ff5149f65 (patch) | |
| tree | 9364c4e5a59ddfec9b828a82ca21bb173dd78bb9 /net/ipv6 | |
| parent | 14e7a4c00404a80225e73fe793c5590c8bce8431 (diff) | |
rtnl: limit IFLA_NUM_TX_QUEUES and IFLA_NUM_RX_QUEUES to 4096
commit 0e1d6eca5113858ed2caea61a5adc03c595f6096 upstream.
We have an impressive number of syzkaller bugs that are linked
to the fact that syzbot was able to create a networking device
with millions of TX (or RX) queues.
Let's limit the number of RX/TX queues to 4096, this really should
cover all known cases.
A separate patch will add various cond_resched() in the loops
handling sysfs entries at device creation and dismantle.
Tested:
lpaa6:~# ip link add gre-4097 numtxqueues 4097 numrxqueues 4097 type ip6gretap
RTNETLINK answers: Invalid argument
lpaa6:~# time ip link add gre-4096 numtxqueues 4096 numrxqueues 4096 type ip6gretap
real 0m0.180s
user 0m0.000s
sys 0m0.107s
Fixes: 76ff5cc91935 ("rtnl: allow to specify number of rx and tx queues on device creation")
Change-Id: Ife7cd2e3892d21fcf62e478ac1f620d3ee9b798e
Signed-off-by: Eric Dumazet <edumazet@google.com>
Reported-by: syzbot <syzkaller@googlegroups.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
[bwh: Backported to 3.16: adjust context]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Diffstat (limited to 'net/ipv6')
0 files changed, 0 insertions, 0 deletions