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commit c64e39c69a9a7ee32c00b0cf7918f6274a565544
Author: Greg Hudson <ghudson@mit.edu>
Date: Fri Jan 3 13:50:48 2014 -0500
Mark AESNI files as not needing executable stacks
Some Linux systems now come with facilities to mark the stack as
non-executable, making it more difficult to exploit buffer overrun
bugs. For this to work, object files built from assembly need a
section added to note whether they require an executable stack.
Patch from Dhiru Kholia with comments added. More information at:
https://bugzilla.redhat.com/show_bug.cgi?id=1045699
https://wiki.gentoo.org/wiki/Hardened/GNU_stack_quickstart
ticket: 7813
target_version: 1.12.1
tags: pullup
diff --git a/src/lib/crypto/builtin/aes/iaesx64.s b/src/lib/crypto/builtin/aes/iaesx64.s
index 1c091c1..d03c859 100644
--- a/src/lib/crypto/builtin/aes/iaesx64.s
+++ b/src/lib/crypto/builtin/aes/iaesx64.s
@@ -834,3 +834,14 @@ lp256encsingle_CBC:
movdqu [r9],xmm1
add rsp,16*16+8
ret
+
+; Mark this file as not needing an executable stack.
+%ifidn __OUTPUT_FORMAT__,elf
+section .note.GNU-stack noalloc noexec nowrite progbits
+%endif
+%ifidn __OUTPUT_FORMAT__,elf32
+section .note.GNU-stack noalloc noexec nowrite progbits
+%endif
+%ifidn __OUTPUT_FORMAT__,elf64
+section .note.GNU-stack noalloc noexec nowrite progbits
+%endif
diff --git a/src/lib/crypto/builtin/aes/iaesx86.s b/src/lib/crypto/builtin/aes/iaesx86.s
index b667acd..1aa12e6 100644
--- a/src/lib/crypto/builtin/aes/iaesx86.s
+++ b/src/lib/crypto/builtin/aes/iaesx86.s
@@ -871,3 +871,14 @@ lp256encsingle_CBC:
movdqu [ecx],xmm1 ; store last iv for chaining
ret
+
+; Mark this file as not needing an executable stack.
+%ifidn __OUTPUT_FORMAT__,elf
+section .note.GNU-stack noalloc noexec nowrite progbits
+%endif
+%ifidn __OUTPUT_FORMAT__,elf32
+section .note.GNU-stack noalloc noexec nowrite progbits
+%endif
+%ifidn __OUTPUT_FORMAT__,elf64
+section .note.GNU-stack noalloc noexec nowrite progbits
+%endif
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