Change in libosmo-abis[master]: e1_input: Initialize list struct

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laforge gerrit-no-reply at lists.osmocom.org
Tue Jun 9 07:35:13 UTC 2020


laforge has posted comments on this change. ( https://gerrit.osmocom.org/c/libosmo-abis/+/18731 )

Change subject: e1_input: Initialize list struct
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Patch Set 2:

(1 comment)

https://gerrit.osmocom.org/c/libosmo-abis/+/18731/2/src/e1_input.c 
File src/e1_input.c:

https://gerrit.osmocom.org/c/libosmo-abis/+/18731/2/src/e1_input.c@571 
PS2, Line 571: talloc_zero
> If we were not using zero-initialization everywhere, we would notice this problem much earlier.
In general I agree, but not in this specific case.  Zero-initializing all llist_heads by talloc_zero of the entire struct makes sure that anyone performing an illegal operation on the llist_head (such as adding something) will cause a null pointer dereference rather than dereferencing some random part of memory (which might be valid! [unlikely, but still])



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Gerrit-Project: libosmo-abis
Gerrit-Branch: master
Gerrit-Change-Id: I850fdc43d597267aa66c6975aca9c1753231ac65
Gerrit-Change-Number: 18731
Gerrit-PatchSet: 2
Gerrit-Owner: pespin <pespin at sysmocom.de>
Gerrit-Reviewer: Jenkins Builder
Gerrit-Reviewer: fixeria <vyanitskiy at sysmocom.de>
Gerrit-Reviewer: laforge <laforge at osmocom.org>
Gerrit-Comment-Date: Tue, 09 Jun 2020 07:35:13 +0000
Gerrit-HasComments: Yes
Gerrit-Has-Labels: No
Comment-In-Reply-To: fixeria <vyanitskiy at sysmocom.de>
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