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| author | Cong Wang <xiyou.wangcong@gmail.com> | 2019-12-06 06:39:02 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-12-18 18:08:51 +0300 |
| commit | 23fbdd5d1e826454a1ce199e716e2015033212c4 (patch) | |
| tree | 65abe1b24874900c2fe690bb2b67e55433e59d95 /net/sched | |
| parent | 71bc12b1fb4afedf52d558a2cfb351f68831caeb (diff) | |
| download | linux-23fbdd5d1e826454a1ce199e716e2015033212c4.tar.xz | |
gre: refetch erspan header from skb->data after pskb_may_pull()
[ Upstream commit 0e4940928c26527ce8f97237fef4c8a91cd34207 ]
After pskb_may_pull() we should always refetch the header
pointers from the skb->data in case it got reallocated.
In gre_parse_header(), the erspan header is still fetched
from the 'options' pointer which is fetched before
pskb_may_pull().
Found this during code review of a KMSAN bug report.
Fixes: cb73ee40b1b3 ("net: ip_gre: use erspan key field for tunnel lookup")
Cc: Lorenzo Bianconi <lorenzo.bianconi@redhat.com>
Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
Acked-by: Lorenzo Bianconi <lorenzo.bianconi@redhat.com>
Acked-by: William Tu <u9012063@gmail.com>
Reviewed-by: Simon Horman <simon.horman@netronome.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'net/sched')
0 files changed, 0 insertions, 0 deletions