The keyring_detect_cycle_iterator function in security/keys/keyring.c in the Linux kernel through 3.13.6 does not properly determine whether keyrings are identical, which allows local users to cause a denial of service (OOPS) via crafted keyctl commands.
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[linux-kernel] 20140227 kernel BUG at security/keys/keyring.c:1003!
[oss-security] 20140304 CVE-2014-0102 -- Linux kernel: security: keyring cycle detector DoS