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| author | Tilman Schmidt <tilman@imap.cc> | 2009-10-06 16:18:31 +0400 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2009-10-07 09:20:58 +0400 |
| commit | ee239d9901c13040598f6c46d5017869c6d14e2e (patch) | |
| tree | da17fe435e47009304ebb3a5052eedf7aeae8249 | |
| parent | 3305adffc556f7998b40c31afcef4c8755ce919a (diff) | |
| download | linux-ee239d9901c13040598f6c46d5017869c6d14e2e.tar.xz | |
gigaset: linearize skb
The code of the Gigaset driver assumes that sk_buff-s coming
from the ISDN4Linux subsystem are always linear. Explicitly
calling skb_linearize() is cheap if they are, but much more
robust in case they ever aren't.
Impact: robustness improvement
Signed-off-by: Tilman Schmidt <tilman@imap.cc>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | drivers/isdn/gigaset/i4l.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/isdn/gigaset/i4l.c b/drivers/isdn/gigaset/i4l.c index 9b22f9cf2f33..322f16ebc6ec 100644 --- a/drivers/isdn/gigaset/i4l.c +++ b/drivers/isdn/gigaset/i4l.c @@ -51,6 +51,12 @@ static int writebuf_from_LL(int driverID, int channel, int ack, return -ENODEV; } bcs = &cs->bcs[channel]; + + /* can only handle linear sk_buffs */ + if (skb_linearize(skb) < 0) { + dev_err(cs->dev, "%s: skb_linearize failed\n", __func__); + return -ENOMEM; + } len = skb->len; gig_dbg(DEBUG_LLDATA, |