CVE ID:	CVE-2018-13093
Description:	An issue was discovered in fs/xfs/xfs_icache.c in the Linux kernel through 4.17.3. There is a NULL pointer dereference and panic in lookup_slow() on a NULL inode->i_ops pointer when doing pathwalks on a corrupted xfs image. This occurs because of a lack of proper validation that cached inodes are free during allocation.
Test IDs:	None available
Cross References:	Common Vulnerability Exposure (CVE) ID: CVE-2018-13093 https://bugzilla.kernel.org/show_bug.cgi?id=199367 https://git.kernel.org/pub/scm/fs/xfs/xfs-linux.git/commit/?h=for-next&id=afca6c5b2595fc44383919fba740c194b0b76aff https://github.com/torvalds/linux/commit/afca6c5b2595fc44383919fba740c194b0b76aff https://lists.debian.org/debian-lts-announce/2020/03/msg00001.html RedHat Security Advisories: RHSA-2019:2029 https://access.redhat.com/errata/RHSA-2019:2029 RedHat Security Advisories: RHSA-2019:2043 https://access.redhat.com/errata/RHSA-2019:2043 https://usn.ubuntu.com/4094-1/ https://usn.ubuntu.com/4118-1/