Description: zram sysfs resource consumption
References:
 https://www.openwall.com/lists/oss-security/2020/06/18/1
 https://lore.kernel.org/linux-block/20200617103412.GA2027053@kroah.com/
 https://bugzilla.redhat.com/show_bug.cgi?id=1847832
Notes:
 carnil> Commit fixes f40609d1591f ("zram: convert remaining
 carnil> CLASS_ATTR() to CLASS_ATTR_RO()") in 4.13-rc1.
Bugs:
upstream: released (5.8-rc6) [853eab68afc80f59f36bbdeb715e5c88c501e680]
4.19-upstream-stable: released (4.19.134) [81a91bf266dd7f2dd56fc3472b7bb54348ac62c7]
4.9-upstream-stable: N/A "Vulnerable code introduced later"
3.16-upstream-stable: N/A "Vulnerable code introduced later"
sid: released (5.7.10-1)
4.19-buster-security: released (4.19.146-1)
4.9-stretch-security: N/A "Vulnerable code introduced later"
3.16-jessie-security: N/A "Vulnerable code introduced later"