Re: [PATCH] qla2xxx: Avoid triggering undefined behavior in qla2x00_mbx_completion()

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To: Bart Van Assche <bart.vanassche@xxxxxxx>
Subject: Re: [PATCH] qla2xxx: Avoid triggering undefined behavior in qla2x00_mbx_completion()
From: "Martin K. Petersen" <martin.petersen@xxxxxxxxxx>
Date: Tue, 30 Jan 2018 21:33:59 -0500
Cc: "Martin K . Petersen" <martin.petersen@xxxxxxxxxx>, "James E . J . Bottomley" <jejb@xxxxxxxxxxxxxxxxxx>, linux-scsi@xxxxxxxxxxxxxxx, Himanshu Madhani <himanshu.madhani@xxxxxxxxxx>
In-reply-to: <20180125162429.7962-1-bart.vanassche@wdc.com> (Bart Van Assche's message of "Thu, 25 Jan 2018 08:24:29 -0800")
Organization: Oracle Corporation
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/25.3 (gnu/linux)

Bart,

> A left shift must shift less than the bit width of the left argument.
> Avoid triggering undefined behavior if ha->mbx_count == 32.

Applied to 4.16/scsi-fixes. Thank you!

-- 
Martin K. Petersen	Oracle Linux Engineering

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References:
- [PATCH] qla2xxx: Avoid triggering undefined behavior in qla2x00_mbx_completion()
  - From: Bart Van Assche

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