An issue was discovered in the Linux kernel before 5.0.4. The 9p filesystem did not protect i_size_write() properly, which causes an i_size_read() infinite loop and denial of service on SMP systems.
cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.0.4
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=5e3cc1ee1405a7eb3487ed24f786dec01b4cbe1f
patchwork.kernel.org/patch/10753365/
security.netapp.com/advisory/ntap-20191004-0001/
support.f5.com/csp/article/K43239141?utm_source=f5support&%3Butm_medium=RSS