From: "Martin K. Petersen" <martin.petersen@oracle.com>
To: Todd Poynor <toddpoynor@google.com>
Cc: Doug Gilbert <dgilbert@interlog.com>,
"James E.J. Bottomley" <jejb@linux.vnet.ibm.com>,
"Martin K. Petersen" <martin.petersen@oracle.com>,
linux-scsi@vger.kernel.org, linux-kernel@vger.kernel.org,
Hannes Reinecke <hare@suse.de>
Subject: Re: [PATCH] sg: protect against races between mmap() and SG_SET_RESERVED_SIZE
Date: Tue, 22 Aug 2017 22:21:06 -0400 [thread overview]
Message-ID: <yq1d17naust.fsf@oracle.com> (raw)
In-Reply-To: <20170816054108.119890-1-toddpoynor@google.com> (Todd Poynor's message of "Tue, 15 Aug 2017 22:41:08 -0700")
Todd,
> Take f_mutex around mmap() processing to protect against races with
> the SG_SET_RESERVED_SIZE ioctl. Ensure the reserve buffer length
> remains consistent during the mapping operation, and set the
> "mmap called" flag to prevent further changes to the reserved buffer
> size as an atomic operation with the mapping.
Applied to 4.14/scsi-queue (with a slight whitespace fix). Thanks!
--
Martin K. Petersen Oracle Linux Engineering
prev parent reply other threads:[~2017-08-23 2:21 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-08-16 5:41 [PATCH] sg: protect against races between mmap() and SG_SET_RESERVED_SIZE Todd Poynor
2017-08-23 1:48 ` Douglas Gilbert
2017-08-23 2:21 ` Martin K. Petersen [this message]
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