CVE ID:	CVE-2018-1092
Description:	The ext4_iget function in fs/ext4/inode.c in the Linux kernel through 4.15.15 mishandles the case of a root directory with a zero i_links_count, which allows attackers to cause a denial of service (ext4_process_freed_data NULL pointer dereference and OOPS) via a crafted ext4 image.
Test IDs:	None available
Cross References:	Common Vulnerability Exposure (CVE) ID: CVE-2018-1092 DSA-4187 https://www.debian.org/security/2018/dsa-4187 DSA-4188 https://www.debian.org/security/2018/dsa-4188 RHSA-2018:2948 https://access.redhat.com/errata/RHSA-2018:2948 RHSA-2018:3083 https://access.redhat.com/errata/RHSA-2018:3083 RHSA-2018:3096 https://access.redhat.com/errata/RHSA-2018:3096 USN-3676-1 https://usn.ubuntu.com/3676-1/ USN-3676-2 https://usn.ubuntu.com/3676-2/ USN-3677-1 https://usn.ubuntu.com/3677-1/ USN-3677-2 https://usn.ubuntu.com/3677-2/ USN-3678-1 https://usn.ubuntu.com/3678-1/ USN-3678-2 https://usn.ubuntu.com/3678-2/ USN-3678-3 https://usn.ubuntu.com/3678-3/ USN-3678-4 https://usn.ubuntu.com/3678-4/ USN-3754-1 https://usn.ubuntu.com/3754-1/ [debian-lts-announce] 20180502 [SECURITY] [DLA 1369-1] linux security update https://lists.debian.org/debian-lts-announce/2018/05/msg00000.html http://openwall.com/lists/oss-security/2018/03/29/1 http://openwall.com/lists/oss-security/2018/03/29/1 https://bugzilla.kernel.org/show_bug.cgi?id=199179 https://bugzilla.kernel.org/show_bug.cgi?id=199179 https://bugzilla.kernel.org/show_bug.cgi?id=199275 https://bugzilla.kernel.org/show_bug.cgi?id=199275 https://bugzilla.redhat.com/show_bug.cgi?id=1560777 https://bugzilla.redhat.com/show_bug.cgi?id=1560777 https://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4.git/commit/?id=8e4b5eae5decd9dfe5a4ee369c22028f90ab4c44 https://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4.git/commit/?id=8e4b5eae5decd9dfe5a4ee369c22028f90ab4c44