Subject: softmac possible null deref [was: Complete report of Null dereference errors in kernel 2.6.17.1]

From: Daniel Drake <[email-masked]>
Date: Tue, 25 Jul 2006 01:00:54 +0100

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?

Daniel