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(parent: d1a994a) | patch
xfs: fix over-copying of getbmap parameters from userspace
authorDarrick J. Wong <darrick.wong@oracle.com>
Mon, 3 Apr 2017 22:17:57 +0000 (15:17 -0700)
committerDarrick J. Wong <darrick.wong@oracle.com>
Mon, 3 Apr 2017 22:18:16 +0000 (15:18 -0700)
commit1e9b146fd38f6e22b4991bf566d7c6253f2ff02a
tree276214b108e95e5bec99e26e7087c384b8f590d2tree | snapshot
parentd1a994a0647c7c5124482523f3c977a301a1f2d5commit | diff
xfs: fix over-copying of getbmap parameters from userspace

In xfs_ioc_getbmap, we should only copy the fields of struct getbmap
from userspace, or else we end up copying random stack contents into the
kernel.  struct getbmap is a strict subset of getbmapx, so a partial
structure copy should work fine.

Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
fs/xfs/xfs_ioctl.c diff | blob | history
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