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authorKevin Darbyshire-Bryant <ldir@darbyshire-bryant.me.uk>2018-06-18 09:08:05 +0000
committerJohn Crispin <john@phrozen.org>2018-06-18 15:27:15 +0200
commitd600de3ddde269bf0b324735f8f12278f82d9b37 (patch)
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parent0276e1f7608a2b5252aee0c92c9834a150582ffe (diff)
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kernel: atm: pppoatm fix vc-mux connection failures
Backport a hot off the press upstream kernel ATM fix: Preserve value of skb->truesize when accounting to vcc "There's a hack in pskb_expand_head() to avoid adjusting skb->truesize for certain skbs. Ideally it would cover ATM too. It doesn't. Just stashing the accounted value and using it in atm_raw_pop() is probably the easiest way to cope." The issue was exposed by upstream with: commit 14afee4b6092fde451ee17604e5f5c89da33e71e Author: Reshetova, Elena <elena.reshetova@intel.com> Date: Fri Jun 30 13:08:00 2017 +0300 net: convert sock.sk_wmem_alloc from atomic_t to refcount_t But an earlier commit left the ticking timebomb: 158f323b9868 ("net: adjust skb->truesize in pskb_expand_head() Sincerest thanks to Mathias Kresin <dev@kresin.me> for debugging assistance and to David Woodhouse <dwmw2@infradead.org> for further guidance, cajoling & patience in interpreting the debug I was giving him and producing a fix! Fixes FS#1567 Signed-off-by: Kevin Darbyshire-Bryant <ldir@darbyshire-bryant.me.uk>
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