Re: [PATCH] sg: protect against races between mmap() and SG_SET_RESERVED_SIZE

From	"Martin K. Petersen" <martin.petersen@oracle.com>
Newsgroups	linux.kernel
Subject	Re: [PATCH] sg: protect against races between mmap() and SG_SET_RESERVED_SIZE
Date	2017-08-23 04:30 +0200
Message-ID	<uhtAC-2W7-3@gated-at.bofh.it> (permalink)
References	<ueZnj-36e-7@gated-at.bofh.it>
Organization	Oracle Corporation

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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

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[PATCH] sg: protect against races between mmap() and SG_SET_RESERVED_SIZE Todd Poynor <toddpoynor@google.com> - 2017-08-16 07:50 +0200
  Re: [PATCH] sg: protect against races between mmap() and  SG_SET_RESERVED_SIZE Douglas Gilbert <dgilbert@interlog.com> - 2017-08-23 03:50 +0200
  Re: [PATCH] sg: protect against races between mmap() and SG_SET_RESERVED_SIZE "Martin K. Petersen" <martin.petersen@oracle.com> - 2017-08-23 04:30 +0200

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