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Date: Tue, 28 Feb 2017 17:20:34 +0100
From: Salvatore Bonaccorso <>
To: OSS Security Mailinglist <>
Subject: Linux: irda: Fix lockdep annotations in hashbin_delete()


CVE-2017-6348 was assigned by MITRE to the following (via

> irda: Fix lockdep annotations in hashbin_delete().
> A nested lock depth was added to the hasbin_delete() code but it
> doesn't actually work some well and results in tons of lockdep splats.
> Fix the code instead to properly drop the lock around the operation
> and just keep peeking the head of the hashbin queue.

Quoting a note from Ben Hutchins: "This actually changes locking, not just
lockdep annotations. So I think it fixes a potential deadlock."

The fix was as well backported to 4.9.13.


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