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| author |   Eric Dumazet <edumazet@google.com> | 2015-03-11 18:42:02 -0700 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2015-03-11 23:51:18 -0400 |
| commit | c29390c6dfeee0944ac6b5610ebbe403944378fc (patch) | |
| tree | befe951b043be948957abb1db65cee36dd7a379b /net/ipv4/tcp_vegas.h | |
| parent | xen-netback: notify immediately after pushing Tx response. (diff) | |
| download | linux-dev-c29390c6dfeee0944ac6b5610ebbe403944378fc.tar.xz linux-dev-c29390c6dfeee0944ac6b5610ebbe403944378fc.zip | |
xps: must clear sender_cpu before forwarding
John reported that my previous commit added a regression
on his router.
This is because sender_cpu & napi_id share a common location,
so get_xps_queue() can see garbage and perform an out of bound access.
We need to make sure sender_cpu is cleared before doing the transmit,
otherwise any NIC busy poll enabled (skb_mark_napi_id()) can trigger
this bug.
Signed-off-by: Eric Dumazet <edumazet@google.com>
Reported-by: John <jw@nuclearfallout.net>
Bisected-by: John <jw@nuclearfallout.net>
Fixes: 2bd82484bb4c ("xps: fix xps for stacked devices")
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv4/tcp_vegas.h')
0 files changed, 0 insertions, 0 deletions