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e6d9668e11
Some discussion with the glibc mailing lists revealed that this was necessary for 64-bit platforms with MIPS-like sign-extension rules for 32-bit values. The original symptom was that passing (uid_t)-1 to setreuid() was failing in programs linked -pthread because of the "setxid" mechanism for passing setxid-type function arguments to the syscall code. SYSCALL_WRAPPERS handles ensuring that all syscall arguments end up with proper sign-extension and is thus the appropriate fix for this problem. On other platforms (s390, powerpc, sparc64, and mips) this was fixed in 2.6.28.6. The general issue is tracked as CVE-2009-0029. Cc: <stable@vger.kernel.org> Signed-off-by: Chris Metcalf <cmetcalf@tilera.com> |
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