From: Andrew Morton <akpm@osdl.org>
To: netdev@vger.kernel.org
Cc: Arnaldo Carvalho de Melo <acme@conectiva.com.br>,
Jesse Brandeburg <jesse.brandeburg@intel.com>,
"bugme-daemon@kernel-bugs.osdl.org"
<bugme-daemon@bugzilla.kernel.org>
Subject: Fw: [Bugme-new] [Bug 6409] New: llc_rcv doesn't handle receives using nr_frags and frags[]
Date: Wed, 19 Apr 2006 11:38:06 -0700 [thread overview]
Message-ID: <20060419113806.29ba0d23.akpm@osdl.org> (raw)
Begin forwarded message:
Date: Wed, 19 Apr 2006 11:32:18 -0700
From: bugme-daemon@bugzilla.kernel.org
To: bugme-new@lists.osdl.org
Subject: [Bugme-new] [Bug 6409] New: llc_rcv doesn't handle receives using nr_frags and frags[]
http://bugzilla.kernel.org/show_bug.cgi?id=6409
Summary: llc_rcv doesn't handle receives using nr_frags and
frags[]
Kernel Version: 2.6.16
Status: NEW
Severity: normal
Owner: acme@conectiva.com.br
Submitter: jesse.brandeburg@intel.com
Most recent kernel where this bug did not occur:
Distribution: n/a
Hardware Environment: i686
Software Environment: n/a
Problem Description:
after hitting a *very hard to repro* BUG in a distro kernel I did some code
inspection that seems to show that llc_rcv does not handle receive packets using
skb->data *and* skb_shinfo(skb)->frags[]/nr_frags
Steps to reproduce:
Apparently receiving some netware (802_2) traffic when using one of the
PCI-Express e1000 adapters with packet splitting enabled. Even if the packet is
not split a large frame will use skb->data and ->frags[]
Analysis:
llc_rcv
does a skb_clone inside skb_share_check
llc_fixup_skb
skb_trim
__skb_trim
___pskb_trim(x,x,0) <-- realloc set to 0
___pskb_trim BUG on !realloc inside skb_cloned check
I'll attach the trace from the vendor kernel, I believe the problem is still
relevant to 2.6.16.
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next reply other threads:[~2006-04-19 18:39 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-04-19 18:38 Andrew Morton [this message]
2006-04-19 22:37 ` [Bugme-new] [Bug 6409] New: llc_rcv doesn't handle receives using nr_frags and frags[] David S. Miller
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