Yan, Zheng 84850e8d8a 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>

2011-10-20 18:10:31 +02:00

103 KiB

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