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| author | Martin Schiller <ms@dev.tdt.de> | 2020-01-21 10:42:33 +0100 |
|---|---|---|
| committer | Hauke Mehrtens <hauke@hauke-m.de> | 2020-01-26 18:38:17 +0100 |
| commit | 996f02e5bafad2815e72821c19d41fb5297e4dad (patch) | |
| tree | dcf57ae3c52e14dda32ada96f358e94f51159d68 | |
| parent | 6e96fd90471a49185bcfe9dcb4844d444674ecab (diff) | |
| download | upstream-996f02e5bafad2815e72821c19d41fb5297e4dad.tar.gz upstream-996f02e5bafad2815e72821c19d41fb5297e4dad.tar.bz2 upstream-996f02e5bafad2815e72821c19d41fb5297e4dad.zip | |
lantiq: ltq-ptm: vr9: fix skb handling in ptm_hard_start_xmit()
Call skb_orphan(skb) to call the owner's destructor function and make
the skb unowned.
This is necessary to prevent sk_wmem_alloc of a socket from overflowing,
which leads to ENOBUFS errors on application level.
Signed-off-by: Martin Schiller <ms@dev.tdt.de>
| -rw-r--r-- | package/kernel/lantiq/ltq-ptm/Makefile | 2 | ||||
| -rw-r--r-- | package/kernel/lantiq/ltq-ptm/src/ifxmips_ptm_vdsl.c | 3 |
2 files changed, 4 insertions, 1 deletions
diff --git a/package/kernel/lantiq/ltq-ptm/Makefile b/package/kernel/lantiq/ltq-ptm/Makefile index 73fd63f42b..8f4db69411 100644 --- a/package/kernel/lantiq/ltq-ptm/Makefile +++ b/package/kernel/lantiq/ltq-ptm/Makefile @@ -8,7 +8,7 @@ include $(TOPDIR)/rules.mk include $(INCLUDE_DIR)/kernel.mk PKG_NAME:=ltq-ptm -PKG_RELEASE:=1 +PKG_RELEASE:=2 PKG_MAINTAINER:=John Crispin <john@phrozen.org> PKG_LICENSE:=GPL-2.0+ diff --git a/package/kernel/lantiq/ltq-ptm/src/ifxmips_ptm_vdsl.c b/package/kernel/lantiq/ltq-ptm/src/ifxmips_ptm_vdsl.c index 9e24c69d94..46a52e29d8 100644 --- a/package/kernel/lantiq/ltq-ptm/src/ifxmips_ptm_vdsl.c +++ b/package/kernel/lantiq/ltq-ptm/src/ifxmips_ptm_vdsl.c @@ -336,6 +336,9 @@ static int ptm_hard_start_xmit(struct sk_buff *skb, struct net_device *dev) dma_cache_wback((unsigned long)skb->data, skb->len); } + /* make the skb unowned */ + skb_orphan(skb); + *(struct sk_buff **)((unsigned int)skb->data - byteoff - sizeof(struct sk_buff *)) = skb; /* write back to physical memory */ dma_cache_wback((unsigned long)skb->data - byteoff - sizeof(struct sk_buff *), skb->len + byteoff + sizeof(struct sk_buff *)); |