Description: xfs: fix _xfs_buf_find oops on blocks beyond the filesystem end
References:
 https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2013-1819
Notes:
 The backported fix in 3.7.y caused a regression and was reverted,
 so be careful with backporting this.
Bugs:
upstream: released (3.8) [eb178619f930fa2ba2348de332a1ff1c66a31424]
2.6.32-upstream-stable: ignored "too risky to backport for minor impact"
sid: released (3.8.11-1)
3.2-wheezy-security: ignored "too risky to backport for minor impact"
2.6.32-squeeze-security: ignored "too risky to backport for minor impact"
3.2-upstream-stable: ignored "too risky to backport for minor impact"