https://github.com/torvalds/linux
Revision eb5e248d502bec191bd99f04cae8b49992b3abde authored by Darrick J. Wong on 22 June 2017, 03:27:35 UTC, committed by Darrick J. Wong on 22 June 2017, 03:27:35 UTC
bmap returns a dumb LBA address but not the block device that goes with
that LBA.  Swapfiles don't care about this and will blindly assume that
the data volume is the correct blockdev, which is totally bogus for
files on the rt subvolume.  This results in the swap code doing IOs to
arbitrary locations on the data device(!) if the passed in mapping is a
realtime file, so just turn off bmap for rt files.

Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
1 parent 95989c4
History
Tip revision: eb5e248d502bec191bd99f04cae8b49992b3abde authored by Darrick J. Wong on 22 June 2017, 03:27:35 UTC
xfs: don't allow bmap on rt files
Tip revision: eb5e248
File Mode Size
Documentation
arch
block
certs
crypto
drivers
firmware
fs
include
init
ipc
kernel
lib
mm
net
samples
scripts
security
sound
tools
usr
virt
.cocciconfig -rw-r--r-- 59 bytes
.get_maintainer.ignore -rw-r--r-- 31 bytes
.gitattributes -rw-r--r-- 30 bytes
.gitignore -rw-r--r-- 1.3 KB
.mailmap -rw-r--r-- 8.1 KB
COPYING -rw-r--r-- 18.3 KB
CREDITS -rw-r--r-- 96.2 KB
Kbuild -rw-r--r-- 2.2 KB
Kconfig -rw-r--r-- 252 bytes
MAINTAINERS -rw-r--r-- 397.6 KB
Makefile -rw-r--r-- 58.6 KB
README -rw-r--r-- 722 bytes

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