Description: NULL pointer dereference in ext4/mballoc.c:ext4_process_freed_data() when mounting crafted ext4 image
References:
 http://www.openwall.com/lists/oss-security/2018/04/20/2
Notes:
Bugs:
 https://bugzilla.kernel.org/show_bug.cgi?id=199179
 https://bugzilla.kernel.org/show_bug.cgi?id=199275
upstream: released (4.17-rc1) [8e4b5eae5decd9dfe5a4ee369c22028f90ab4c44]
4.9-upstream-stable: released (4.9.96) [6b289a7c34d72212bcd5a8ab9b6a657f2f44f0ee]
3.16-upstream-stable: released (3.16.57) [43ef70b328eddc46938878a270895a9ff7b51059]
3.2-upstream-stable: released (3.2.102) [bf7fc655f12864b4c12d902cf60ae37a708cc344]
sid: released (4.15.17-1) [bugfix/all/ext4-fail-ext4_iget-for-root-directory-if-unallocate.patch]
4.9-stretch-security: released (4.9.88-1) [bugfix/all/ext4-fail-ext4_iget-for-root-directory-if-unallocated.patch]
3.16-jessie-security: released (3.16.56-1) [bugfix/all/ext4-fail-ext4_iget-for-root-directory-if-unallocated.patch]
3.2-wheezy-security: released (3.2.101-1) [bugfix/all/ext4-fail-ext4_iget-for-root-directory-if-unallocated.patch]