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net/sched: pedit: make sure that offset is valid
authorAmir Vadai <amir@vadai.me>
Mon, 28 Nov 2016 10:56:40 +0000 (12:56 +0200)
committerBen Hutchings <ben@decadent.org.uk>
Thu, 16 Mar 2017 02:27:21 +0000 (02:27 +0000)
commit1e6f154d4c60f6bcf9b6fb7727c4c016380298e4
tree32b84762c02959e0b409b7908f7205a45b268e55tree | snapshot
parent578298cf24c6d451ef6ac91c72c31351d01dc565commit | diff
net/sched: pedit: make sure that offset is valid

[ Upstream commit 95c2027bfeda21a28eb245121e6a249f38d0788e ]

Add a validation function to make sure offset is valid:
1. Not below skb head (could happen when offset is negative).
2. Validate both 'offset' and 'at'.

Signed-off-by: Amir Vadai <amir@vadai.me>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
net/sched/act_pedit.c diff | blob | history
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