Re: softmac possible null deref [was: Complete report of Nulldereference errors in kernel]

From: Stephen Hemminger
Date: Mon Jul 24 2006 - 20:11:07 EST

On Tue, 25 Jul 2006 01:00:54 +0100
Daniel Drake <dsd@xxxxxxxxxx> wrote:

> Tom Walter Dillig wrote:
> > [109]
> > 452 net/ieee80211/softmac/ieee80211softmac_io.c
> > Possible null dereference of variable "*pkt" in function call
> > (include/asm/string.h:__constant_c_and_count_memset) checked at
> > (453:net/ieee80211/softmac/ieee80211softmac_io.c)
> Either I'm misunderstanding, or this is bogus.
> when *pkt is allocated by the various child functions (e.g.
> ieee80211softmac_disassoc_deauth), it is always checked for NULL.
> Finally, line 453 does another NULL check.

> What is the report trying to say?

That the check in 453 should be removed because is unneeded.

People who obsess about code coverage care that there are unneded
checks. I don't think it matters.
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