Stefan Hajnoczi 8c1d353d10 virtiofsd: stay below fs.file-max sysctl value (CVE-2020-10717) ... The system-wide fs.file-max sysctl value determines how many files can be open. It defaults to a value calculated based on the machine's RAM size. Previously virtiofsd would try to set RLIMIT_NOFILE to 1,000,000 and this allowed the FUSE client to exhaust the number of open files system-wide on Linux hosts with less than 10 GB of RAM! Take fs.file-max into account when choosing the default RLIMIT_NOFILE value. Fixes: CVE-2020-10717 Reported-by: Yuval Avrahami <yavrahami@paloaltonetworks.com> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com> Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com> Message-Id: <20200501140644.220940-3-stefanha@redhat.com> Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>		2020-05-01 18:41:56 +01:00
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virtiofsd	virtiofsd: stay below fs.file-max sysctl value (CVE-2020-10717)	2020-05-01 18:41:56 +01:00