| Date | Mon, 28 May 2012 04:12:17 +0100 | From | Ben Hutchings <> | Subject | [ 015/117] tilegx: enable SYSCALL_WRAPPERS support |
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3.2-stable review patch. If anyone has any objections, please let me know.
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From: Chris Metcalf <cmetcalf@tilera.com>
commit e6d9668e119af44ae5bcd5f1197174531458afe3 upstream.
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.
Signed-off-by: Chris Metcalf <cmetcalf@tilera.com> Signed-off-by: Ben Hutchings <ben@decadent.org.uk> --- arch/tile/Kconfig | 1 + 1 file changed, 1 insertion(+)
diff --git a/arch/tile/Kconfig b/arch/tile/Kconfig index 96033e2..74239dd 100644 --- a/arch/tile/Kconfig +++ b/arch/tile/Kconfig @@ -11,6 +11,7 @@ config TILE select GENERIC_IRQ_PROBE select GENERIC_PENDING_IRQ if SMP select GENERIC_IRQ_SHOW + select HAVE_SYSCALL_WRAPPERS if TILEGX select SYS_HYPERVISOR select ARCH_HAVE_NMI_SAFE_CMPXCHG
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