Description: ocfs2: ip_alloc_sem should be taken in ocfs2_get_block()
References:
Notes:
 bwh> Introduced in 4.6 by commit c15471f79506 "ocfs2: fix sparse file
 bwh> & data ordering issue in direct io"
Bugs:
upstream: released (4.15-rc1) [3e4c56d41eef5595035872a2ec5a483f42e8917f]
4.9-upstream-stable: released (4.9.114) [78a65505cdf7b7392c963d3715269516bc812ef2]
3.16-upstream-stable: N/A "Vulnerability introduced later"
3.2-upstream-stable: N/A "Vulnerability introduced later"
sid: released (4.15.4-1)
4.9-stretch-security: released (4.9.88-1) [bugfix/all/ocfs2-ip_alloc_sem-should-be-taken-in-ocfs2_get_bloc.patch]
3.16-jessie-security: N/A "Vulnerability introduced later"
3.2-wheezy-security: N/A "Vulnerability introduced later"