From: Jon Maloy <>
Date: Tue, 3 Apr 2018 19:11:19 +0200

> When an item of struct tipc_subscription is created, we fail to
> initialize the two lists aggregated into the struct. This has so far
> never been a problem, since the items are just added to a root
> object by list_add(), which does not require the addee list to be
> pre-initialized. However, syzbot is provoking situations where this
> addition fails, whereupon the attempted removal if the item from
> the list causes a crash.
> This problem seems to always have been around, despite that the code
> for creating this object was rewritten in commit 242e82cc95f6 ("tipc:
> collapse subscription creation functions"), which is still in net-next.
> We fix this for that commit by initializing the two lists properly.
> Fixes: 242e82cc95f6 ("tipc: collapse subscription creation functions")
> Reported-by:
> Signed-off-by: Jon Maloy <>

Applied, thanks Jon.

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