CVE-2019-15538

Se descubrió un problema en xfs_setattr_nonsize en fs / xfs / xfs_iops.c en el kernel de Linux a través de 5.2.9. XFS se bloquea parcialmente cuando falla un chgrp debido a que no se encuentra en la cuota de disco. xfs_setattr_nonsize no puede desbloquear el ILOCK después de que la llamada xfs_qm_vop_chown_reserve falla. Este es principalmente un vector de ataque DoS local, pero también podría resultar en DoS remoto si el sistema de archivos XFS se exporta, por ejemplo, a través de NFS.

A flaw was found in the XFS file system in the Linux kernel. An acquired ILOCK was not freed/unlock when the call to xfs_qm_vop_chown_reserve fails and the lock is still held and can lead to denial to access for that device. This is primarily a local denial of service but could result in a remote denial of service if the XFS file system is exported as an NFS file system.

It was discovered that the XFS file system in the Linux kernel did not properly handle mount failures in some situations. A local attacker could possibly use this to cause a denial of service or execute arbitrary code. Benjamin Moody discovered that the XFS file system in the Linux kernel did not properly handle an error condition when out of disk quota. A local attacker could possibly use this to cause a denial of service. Various other issues were also addressed.