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authorKirill Korotaev <dev@openvz.org>2006-09-07 14:17:04 +0400
committerLinus Torvalds <torvalds@g5.osdl.org>2006-09-08 08:40:46 -0700
commit3a459756810912d2c2bf188cef566af255936b4d (patch)
tree1b52d90a2412811ebf5078b4f55112864e1890df /include/asm-sparc
parent10387e5eb45c6e48d67102b88229f5bc6037461c (diff)
[PATCH] IA64,sparc: local DoS with corrupted ELFs
This prevents cross-region mappings on IA64 and SPARC which could lead to system crash. They were correctly trapped for normal mmap() calls, but not for the kernel internal calls generated by executable loading. This code just moves the architecture-specific cross-region checks into an arch-specific "arch_mmap_check()" macro, and defines that for the architectures that needed it (ia64, sparc and sparc64). Architectures that don't have any special requirements can just ignore the new cross-region check, since the mmap() code will just notice on its own when the macro isn't defined. Signed-off-by: Pavel Emelianov <xemul@openvz.org> Signed-off-by: Kirill Korotaev <dev@openvz.org> Acked-by: David Miller <davem@davemloft.net> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de> [ Cleaned up to not affect architectures that don't need it ] Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'include/asm-sparc')
-rw-r--r--include/asm-sparc/mman.h8
1 files changed, 8 insertions, 0 deletions
diff --git a/include/asm-sparc/mman.h b/include/asm-sparc/mman.h
index 88d1886abf3b..b7dc40bc68f4 100644
--- a/include/asm-sparc/mman.h
+++ b/include/asm-sparc/mman.h
@@ -35,4 +35,12 @@
#define MADV_FREE 0x5 /* (Solaris) contents can be freed */
+#ifdef __KERNEL__
+#ifndef __ASSEMBLY__
+#define arch_mmap_check sparc_mmap_check
+int sparc_mmap_check(unsigned long addr, unsigned long len,
+ unsigned long flags);
+#endif
+#endif
+
#endif /* __SPARC_MMAN_H__ */