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(parent: 34e0bbd) | patch
btrfs: check file extent backref offset underflow
authorYan, Zheng <zheng.z.yan@intel.com>
Mon, 29 Aug 2011 01:25:53 +0000 (09:25 +0800)
committerDavid Sterba <dsterba@suse.cz>
Thu, 20 Oct 2011 16:10:31 +0000 (18:10 +0200)
commite30ef0c13a30c409b65ca5c9c89cb389f937c625
tree799dd9e0b150361dc2a5cdf3772a0ce8395d5f06tree | snapshot
parent34e0bbd36518f814e4c80a8e7a4e5e54a99cf8a8commit | diff
btrfs: check file extent backref offset underflow

Offset field in data extent backref can underflow if clone range ioctl
is used. We can reliably detect the underflow because max file size is
limited to 2^63 and max data extent size is limited by block group size.

Signed-off-by: Zheng Yan <zheng.z.yan@intel.com>
fs/btrfs/relocation.c diff | blob | history
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